PROCEDURE FOR THE PRODUCTION OF A MICRO ENGINE

OXYGENATOR

CATHETER FOR HEART FUNCTION ASSISTANCE

ARTIFICIAL, INTO THE BODY IMPLANTIERTES AUXILIARY HEART.

Thermoform cannula with variable cannula body stiffness

A cannula supporting a percutaneous pump can include a proximal section with a first flexural modulus. The cannula can include one or more distal sections with a flexural modulus that is different than the first flexural modulus. The material and its arrangement along the length of the cannula can be selected so as to influence bending properties. This can, for example, allow efficient positioning of the cannula in a desired location without displacing the guidwire.

BLOOD PUMP

A dynamic blood pump includes a rotating core member and rotating ring portion effective to pre-spin blood before the blood enteres helical pumping channels of the pump. The blood is pumped and further rotated as it moves axially along the helical channels toward a centrifugal section of the pump. At the centrifugal pumping section circumferential velocity differentials are also controlled to diminish damage to the blood. Outwardly of the centrifugal pumping section, a forced-vortex pumping section communicates the pumped blood to an exit port.

The compressible motor, the positioning motor of the implantation apparatus and method

CATHETER TO ASSIST THE PERFORMANCE OF A HEART

In a catheter (2) to assist the performance of a heart (1) with at least one pump (7), the pump is formed as a rotary pump at the distal end of the catheter (2), the rotor (6) lying dis- tally on the outer side being coupled via a magneto coupling with a drive wheel (21), formed as a hydraulically or pneu- matically operated paddle wheel, arranged inside the catheter (2). The driving fluid is supplied to the paddle wheel via a lumen (22) of the catheter (2) and is carried off via a further lumen (23) of the catheter.

Axial flow rotor with downstream bearing wash flow

An implantable blood pump includes an impeller rotatable about a rotational axis, having a body with a bottom surface at a downstream end and a central opening centered about the axis extending at least partially through the body from the bottom surface. A projecting element, e.g., a shaft, extends from below the bottom surface into or through the opening to support the impeller. The body can be configured to drive a primary downstream blood flow along an exterior of the body to beyond a peripheral edge of the bottom surface, and to provide a secondary downstream blood flow through the opening and along the bottom surface to beyond the peripheral edge, the secondary flow improving washing of a bearing surface.

DEVICE FOR THE AXIAL PROMOTION OF FLUIDS MEDIA

CENTRIFUGAL PUMP TO FOERDERUNG OF BLOOD

ARTICULATED MOTOR STATOR ASSEMBLY FOR A PUMP

... ▓▓▓An articulating motor stator assembly for use in a pump incorporates features ▓that permit recycling of the motor stator when disposing of other parts of the ▓pump. Such a stator assembly facilitates convenient manufacture, testing, and ▓installation of the pump. For convenient installation, the motor stator ▓assembly can incorporate a multi-part, annular housing that defines a central ▓conduit to receive a motor rotor assembly. The multi-part housing of the motor ▓stator assembly may be selectively repositioned between an open and closed ▓configuration. In its open configuration a motor rotor assembly may be ▓conveniently installed in the motor stator and when closed the motor stator ▓will actuate the motor rotor assembly in order to operate a pump. The assembly ▓thereby enables separate manufacture and shipment from a remote location. In ▓addition, the assembly can be separately tested prior to installation. After ▓pump use, the motor stator can be opened so as to remove the motor ...

OXYGENATOR

Implantable cardiac pump.

Il s'agit d'une pompe cardiaque (1) implantable comprenant un boîtier (6) muni d'au moins un orifice d'aspiration (7) et d'au moins un orifice de refoulement (9) du sang, et des moyens (11) d'entraînement du sang en continu, internes au boîtier et situés entre lesdits orifices. Les moyens d'entraînement comprennent au moins deux vis (13, 16) sans fin à pas inverse de forme complémentaire, dont l'une (13) est creuse et l'autre (16) est pleine, s'engrenant l'une dans l'autre, les vis étant chacune motorisée et agencée pour repousser le sang entre l'orifice d'aspiration et l'orifice de refoulement du boîtier.

CENTRIFUGAL PUMPS FOR MEDICAL USES

Extracorporeal circuit devices can be used for on-pump open-heart surgery to support surgical procedures such as coronary artery bypass grafting. In some cases, a centrifugal pump is used as part of an extracorporeal circuit. Centrifugal pump heads are described herein that induce flow on two sides of an impeller plate, and that can be conveniently mechanically assembled.

INTRAKARDIALE PUMPING DEVICE

KANNULATIONSANORDNUNG

Blood pumping device

Disclosed is a blood pumping device, comprising: a housing (10) having an overflow passage (11), and an inlet (12) and an outlet (13) respectively connected to the overflow passage (11); a rotor assembly (20) rotatably arranged in the overflow passage (11); a coil (30) arranged in a side wall of the housing (10); a first permanent magnet part (42) arranged inside the rotor assembly (20); a second permanent magnet part (44) arranged in the side wall of the housing (10), with the first permanent magnet part (42) and the second permanent magnet part (44) forming a radial permanent magnetic bearing; a piece of electric motor magnetic steel (40) arranged inside a rotor of the rotor assembly (20); and a magnetic protection part (31) arranged at the periphery of the coil (30), wherein the magnetic protection part (31) and the piece of electric motor magnetic steel (40) act together to provide an axial pre-tightening force for the rotor assembly (20). The blood pumping device provides a radial ...

ANTI-THROMBOGENIC BLOOD PUMP

BLOOD PUMP

FLEXIBLE MEMBRANE SEALLESS CENTRIFUGAL PUMP

... 2123305 9310357 PCTABS00022 Centrifugal pumps (10) are disclosed having nonrotatable membranes (21) to rotate fluid in a pumping chamber having at least a first open passage inlet (71) and an open passage outlet (91). Specifically, the membrane (21) is deflected into a nonconcentric shape to the fluid rotation, with the nonconcentric shape being rotated to function as a centrifugal pump impeller by deformers (41, 42, 43) separated from the pumped fluid by the membrane (21). As the membrane (21) does not rotate, rotary shaft seals, bearings, or small gaps between moving, sliding, and/or rubbing pump surfaces and to which the pumped fluid is accessible are not required in the pumps (10). In preferred forms, the deformers (41, 42) can be located inside the membrane (21) and inside the pumping chamber or the deformer (43) can be located outside the membrane (21) and outside the pumping chamber. The membranes (21) are corrugated (102, 103) in the preferred form to direct the fluid flow into ...

Auxiliary Artificial Heart of the Embedded-In-Body Type

INTRACARDIAC PUMP DEVICE

The invention relates to a pump device comprising a first pump (10a) and a second pump (10b). The suction end of the first pump (10a) can be introduced into the left ventricle (42) of the heart, whilst the delivery end is positioned in the aorta (40), and the suction end of the second pump (10b) is arranged in the right atrium (43) whilst the delivery end is positioned in the pulmonary artery (47). Both pumps (10a, 10b) are driven interdependently by a single control unit, the first pump (10a) assumes a lead function while the second pump (10b) only pumps around 90 % of the volume flow of said first (10a) pump. Pressure sensors on the pumps serve to detect the pressure difference between the suction end and the delivery end of a pump and to determine the volume flow. Both pumps are introduced into the heart without the ventricle having to be opened.

METHOD FOR PRODUCING A MICROMOTOR

According to the method, the components (24a, 24b) of a stator (24) are slid onto a mandrel (60), said mandrel being inserted into an injection mould (50). The motor housing is produced by injecting polymeric material (63), the stator components (24a, 24b) being injected into said housing. A bearing (27) is contained in the injection mould (50) during the injection process. The mandrel (60) is then pulled out of the stator and a prepared rotor is inserted. This provides an economical and highly precise method for producing an electromotor with very small dimensions.

AXIAL FLOW PUMP WITH MULTI-GROOVED ROTOR

An axial-flow blood pump for pumping blood includes a substantially cylindrical outer enclosure. A tubular housing concentric with and located within the outer enclosure has at one end an inlet and at an opposite end an outlet. A motor stator is concentric with and located between the outer enclosure and the tubular housing. An impeller is concentric with and located within the tubular housing. The impeller is suspended in operation by a combination of passive magnetic forces between magnets within the impeller or magnetized regions of the impeller and the motor stator and hydrodynamic thrust forces generated as blood flows between the tubular housing and a plurality of hydrodynamic thrust bearing surfaces located on the impeller. A volute may be in fluid-tight connection with the outlet of the tubular housing for receiving blood in the axial direction and directing blood in a direction normal to the axial direction. The volute has a flow-improving member extending axially from the volute ...

SYSTEMS AND METHODS FOR REDUCING PRESSURE AT OUTFLOW OF A DUCT

Various systems and methods are provided for reducing pressure at an outflow of a duct such as the thoracic duct or the lymphatic duct. A catheter system can include a catheter shaft configured to be at least partially implantable within a patient's vein, a flexible membrane attached to the catheter shaft, the flexible membrane being a collapsible, tube-like member having a lumen extending therethrough, and a single selectively deployable restriction member formed over a portion of the flexible membrane at substantially a midpoint between a proximal end of the flexible membrane and a distal end of the flexible membrane, the restriction member being configured to control a size of the lumen so as to direct a controlled volume of fluid from an upstream side of the restriction member to a downstream side the restriction member.

LIQUID PUMP

LIQUID PUMP A two stage centrifugal and shear pump is characterized by low turbulence for pumping delicate liquids, as blood. Centrifugal first stage is a hollow shaft on which the shear pump discs are mounted. Offset slots in the shaft and disc hubs direct liquid out of the shaft to the discs.

TWO-STAGE ROTODYNAMIC BLOOD PUMP

A pump includes a housing, a stator supported in the housing, and a rotor assembly including a rotor supported in the housing for rotation relative to the stator about an axis. The stator includes a stator core, a first lamination wound around an axial portion of the stator core, and a second lamination wound around a second axial portion of the stator core. The first and second laminations are spaced from each other along the length of the stator core. The rotor includes a rotor core, a first magnet assembly that extends around an axial portion of the rotor core, and a second magnet assembly that extends around a second axial portion of the rotor core. The first and second magnet assemblies are spaced from each other along the length of the rotor.

Blood pump

Die Erfindung betrifft unter anderem eine Blutpumpe (1) mit einem axialen rohrförmigen Einlass (2), einer an den axialen Einlass (2) anschließenden Tangentialkammer (3) mit im Wesentlichen radialem Auslass (18), einem mit dem Auslass und/oder der Tangentialkammer verbundenen axialen Leitkörper (8; 45), einem auf dem Leitkörper (8; 45) gelagerten Laufrad (9) mit einer dem Leitkörper zugewandten Innenfläche (34) und einer Außenfläche (33) sowie einer auf der Außenfläche (33) angeordneten Beschaufelung (20). Erfindungsgemäß ragt zumindest ein Teilbereich (8.2; 8.1) des Leitkörpers von der Tangentialkammer (3) in den Einlass (2), wobei zumindest ein Kraft auf den Rotor (13) übertragender Abschnitt des Stators (12) in dem Teilbereich (8.1, 8.2) angeordnet ist. Das Laufrad (9) ist in radialer Richtung durch ein hydrodynamisches Radiallager gelagert.

Intravascular rotary blood pump

The invention relates to an intravascular rotary blood pump comprising a catheter (10), a pump device (50) fixed distally on the catheter (10) and at least one pressure sensor (30, 60) which is securely connected to the pump device (50) and which has a pressure-sensitive surface (32) which is exposed to the environment and which is oriented perpendicular to the general longitudinal axis of the blood pump.

INTRACARDIAC BLOOD PUMP

The invention relates to a blood pump which has a drive part (11) and a pump part (12), said pump part being extended by means of a flexible hose (13). Pressure sensors (60, 61) detect the pressure difference between the inlet end and the outlet end of the pump. The volume flow can then be determined from the pressure difference in conjunction with the rotational speed. The pressure difference can also be used to determine the correct position of the pump in the heart. Alternatively, the current consumed by the motor (21) is measured and the volume flow of the pump is calculated from this current consumption measurement, taking into account the known rotational speed. The signal of the pressure measurement device or the motor current can be used to determine the correct position of the pump in the heart.

OXYGENATOR

BLOOD PUMP

The invention relates inter alia to a blood pump (1) having an axially tubular inlet (2), a tangential chamber (3) adjoining the axial inlet (2) and having a substantially radial outlet (18), an axial guide body (8; 45) connected to the outlet and/or to the tangential chamber, an impeller (9) supported on the guide body (8; 45) and having an inner surface (34) facing the guide body and an outer surface (33) as well as blading (20) arranged on the outer surface (33). In accordance with the invention, at least one part region (8.2; 8.1) of the guide body projects from the tangential chamber (3) into the inlet (2), wherein at least one section of the stator (12) transmitting a force onto the rotor (13) is arranged in the part region (8.1, 8.2). The impeller (9) is supported by a hydrodynamic radial bearing in the radial direction.

IMPELLER AND FRAME FOR BLOOD PUMP

Apparatus and methods are described including a ventricular assist device that includes an impeller configured to be placed inside a subject's left ventricle. A frame is disposed around the impeller, the frame defining generally-cylindrical central portion, and a proximal conical portion that widens from a proximal end of the frame to a proximal end of the generally-cylindrical central portion. A motor drives the impeller to pump blood from the left ventricle to the subject's aorta, by rotation of the impeller. The impeller is configured to be disposed at least partially within the proximal conical portion of the frame during at least some of a time during which the impeller rotates. Other applications are also described.

Ventricular Assist Devices

An implantable blood pump includes a control unit storing patient specific settings. The control unit is configured to store patient specific settings. The patient specific settings can be used to determine a target operating speed for the blood pump and/or a target operating mode for the blood pump. The patient specific settings can include at least one of an operating mode for the pump, a set speed for the pump, a lower speed limit for the pump, a patient hematocrit value, a patient hematocrit date, a patient blood density, and a periodic log rate for event and periodic data. 1. A method of controlling an implantable blood pump , the method comprising:storing preprogrammed patient specific settings within an implantable control unit;communicating at least one of the preprogrammed patient specific settings from the implantable control unit to a non-implanted external control unit; andcontrolling, by the non-implanted external control unit, operation of the implantable blood pump in accordance with the at least one of the preprogrammed patient specific settings communicated to the external control unit from the implantable control unit.2. The method of claim 1 , wherein the implantable control unit is integrally housed with the implantable blood pump or in a separate implantable housing.3. The method of claim 1 , wherein:the preprogrammed patient specific settings include at least one of a patient specific set speed and a patient specific low speed limit; andthe non-implanted external control unit controls the implantable pump to operate at a target speed that is based on at least one of the patient specific set speed, the patient specific low speed limit, and a set of event based rules for the target speed.4. The method of claim 3 , wherein the set of event based rules for the target speed is based on at least one of the following events:a target running mode for the implantable blood pump is set as stopped;the implantable blood pump has just started up;a suction ...

Cavopulmonary viscous impeller assist device and method

CAVOPULMONARY VISCOUS IMPELLER ASSIST DEVICE AND An apparatus (20, 120) for pumping blood in the circulatory system of an animal, comprising: a rotor (80, 180) symmetrical about a rotational axis and symmetrical about a plane perpendicular to the rotational axis, said rotor (80, 180) having an outer surface adapted and configured for pumping blood, said rotor (80, 180) having an interior and including a first plurality of permanent magnets (81); a stator (60, 160) including a plurality of electrical windings (64), said windings (64) being located within the interior of said rotor (80, 180) and establishing a radial gap between the magnets (81) and the windings (64), the gap being adapted and configured to discourage clotting of the blood therebetween; a source of electrical power; and an electronic controller operably connecting said source to said winding (64); wherein said rotor (80, 180) spins relative to said stator in response to said controller providing power to said windings (64 ...

ROTARY PUMP, IN PARTICULAR INTENDED TO FORM ARTIFICIAL HEART

Electrical heart aid pump - handles majority of blood circulation while leaving heart nerves unaffected

경피적 시스템, 장치 및 방법

... 본 발명은 두 해부학적 구역 사이의 유체 연통을 제공하는 트랜스카테터 방법에 관한 것이다. 본 발명은 또한 적어도 하나의 해부학적 벽을 통한 두 해부학적 구역 사이의 유체 연통을 제공하는 체내 커넥터를 포함하는 트랜스카테터 시스템-상기 커넥터는 흐름 조절 장치를 수용하도록 구성됨, 커넥터, 흐름 조절 장치 및 삽입 장치에 관한 것이다.

Blood pump

SYSTEMS AND METHODS FOR REDUCING PRESSURE AT AN OUTFLOW OF A DUCT

Various systems and methods are provided for reducing pressure at an outflow of a duct such as the thoracic duct or the lymphatic duct. A catheter system can include a catheter shaft configured to be at least partially implantable within a patient's vein, a flexible membrane attached to the catheter shaft, the flexible membrane being a collapsible, tube-like member having a lumen extending therethrough, and a single selectively deployable restriction member formed over a portion of the flexible membrane at substantially a midpoint between a proximal end of the flexible membrane and a distal end of the flexible membrane, the restriction member being configured to control a size of the lumen so as to direct a controlled volume of fluid from an upstream side of the restriction member to a downstream side the restriction member.

Blood circulation system

An artificial heart and lung apparatus includes a roller pump; a blood removal line; a first blood transfer line; a blood removal rate sensor; a control unit that performs the linked control of the roller pump in correspondence with a blood removal rate; and a blood transfer rate adjustment unit that instructs the roller pump to transfer a blood transfer rate. The blood transfer rate adjustment unit includes an operation amount input unit to which an operation amount from an arbitrary circumferential position can be input, and which outputs a pulse signal according to the input operation amount. A counter adds and subtracts pulse signals output from the operation amount input unit, and outputs a resultant as blood transfer rate adjustment data. The counter performs a counting operation with respect to the circumferential position of the operation amount input unit when blood transfer control transitions to the normal control.

Cavopulmonary viscous impeller assist device and method

A bearingless and sealless rotary blood pump is disclosed which provides multidirectional flow intended to provide low-pressure, high-volume right-sided partial assist circulatory support in a univentricular Fontan circulation on a permanent basis. The pump includes a housing and an impeller suspended in the center of the housing. The housing incorporates flow optimization features between inlet and outlet ends, as well as with the impeller surface. Large fluid gaps maintained between impeller and housing eliminate any potential for blood flow obstruction. The impeller contains some motor components. It includes a central stator and surrounding rotor. The motor includes a brushless DC outrunner electrical motor design. An electromagnetic stator core is surrounded by a circumferential passive magnetic ring. The rotor is further levitated about the stator spindle by a plurality of axially and radially located passive magnetic and hydrodynamic journal bearings on both ends of the spindle.

HEART PUMP

A heart pump (1) having a housing (2) with a central longitudinal axis, inlet means (203) and an outlet means (201) is disclosed. A stationary shaft (4) extends axially within the housing (2) and the means (16,17) are provided for supporting the shaft centrally located within the housing (2). A stator assembly (10) is mounted about the stationary shaft (4) and a shell assembly (6) is rotatable about the stator assembly (10) and shaft (4). The shell assembly (6) is located between the housing (2) and stator assembly (10) and includes a spiral ridge (7) located on the outerside thereof for pumping blood through the housing (2) between the housing (2) and shell assembly (6) as the shell assembly (6) rotates. Rotor laminations (51-54) are located on an innerside of the shell assembly (6). The rotor lamination (51-54) have a plurality of axially extending permanent magnets (55-58) therebetween which are circumferentially spaced about the stationary shaft (4). A damper winding means (30, 71-74 ...

HEART RATE DETERMINATION BASED ON VAD CURRENT WAVEFORM

CATHETER TO ASSIST THE PERFORMANCE OF A HEART

In a catheter (2) to assist the performance of a heart (1) with at least one pump (7), the pump is formed as a rotary pump at the distal end of the catheter (2), the rotor (6) lying dis- tally on the outer side being coupled via a magneto coupling with a drive wheel (21), formed as a hydraulically or pneu- matically operated paddle wheel, arranged inside the catheter (2). The driving fluid is supplied to the paddle wheel via a lumen (22) of the catheter (2) and is carried off via a further lumen (23) of the catheter.

Percutaneous system, devices and methods

The present invention relates to a transcatheter method for providing fluid communication between two anatomical compartments. The present invention also relates to a transcatheter system comprising an intracorporeal connector for fluid communication between two anatomical compartments through at least one anatomical wall, wherein said connector is adapted to receive a flow regulating device, a connector, a flow regulating device and an insertion device.

OXYGENATOR

PUMP WHICH IS TO BE IMPLANTED INTO A VESSEL

The invention relates to a pump (1) which is to be implanted into a vessel or a heart, wherein the pump (1) is inserted into the vessel or the heart in a first state, in order to then be able to be functionally changed over to a second state, said pump having a drive part and a delivery part (FE), wherein the drive part is non-functional in the first state and becomes functional owing to the changeover to the second state, wherein the drive part has an electric motor, wherein the electric motor is in the form of a wet rotor, and wherein the rotor (R) of the electric motor is arranged separately from the stator (S) of the electric motor in the first state, and wherein the rotor (R) of the electric motor is moved into the stator (S) of the electric motor in the second state, wherein the rotor (R) can drive the delivery part (FE) in the second state.

AUXILIARY ARTIFICIAL HEART OF THE EMBEDDED-IN-BODY TYPE

An auxiliary artificial heart embedded in the human body. The auxiliary artificial heart has an apex cordis area ring and a body. The apex cordis area ring is embedded in a cut-out apex cordis area of the human heart. The body includes an elongated pump section and a drive section. The pump section is inserted into one of the ventricles of the human heart, passing through the apex cordis area ring. A front end nozzle whose diameter is smaller than that of the pump section is formed at the front end of the pump section, and it is inserted into the aorta or pulmonary artery, passing through the center of the aorta or pulmonary valve. The pump section sucks blood in the ventricle through its base portion and feeds it into the aorta or pulmonary artery through the front end nozzle.

Ventricular assist device control

Rotary pump for artificial heart - has two double bladed rotors within cylindrical stator to define two pumping chambers

Systems and methods for reducing pressure at an outflow of a duct

Various systems and methods are provided for reducing pressure at an outflow of a duct such as the thoracic duct or the lymphatic duct. In one embodiment, an indwelling catheter can be configured to be at least partially implanted within a vein of a patient in the vicinity of an outflow port of a duct of the lymphatic system. The catheter can include first and second restrictors each configured to at least partially occlude the vein within which the catheter is implanted and thus to restrict fluid flow within the vein when the restrictors are activated. The restrictors can each be configured to move between an activated configuration, in which the restrictor occludes the vein, and a relaxed configuration, in which the restrictor does not occlude the vein. The catheter can include a pump, such as an axial motor pump, configured to pump fluid through the catheter.

Systems and methods for reducing pressure at outflow of a duct

Various systems and methods are provided for reducing pressure at an outflow of a duct such as the thoracic duct or the lymphatic duct. A catheter system can include a catheter shaft configured to be at least partially implantable within a patient's vein, a flexible membrane attached to the catheter shaft, the flexible membrane being a collapsible, tube-like member having a lumen extending therethrough, and a single selectively deployable restriction member formed over a portion of the flexible membrane at substantially a midpoint between a proximal end of the flexible membrane and a distal end of the flexible membrane, the restriction member being configured to control a size of the lumen so as to direct a controlled volume of fluid from an upstream side of the restriction member to a downstream side the restriction member.

ROTARY BLOOD PUMP

Systems and methods for reducing pressure at outflow of a duct

CAVOPULMONARY VISCOUS IMPELLER ASSIST DEVICE AND METHOD

ARTICULATED MOTOR STATOR ASSEMBLY FOR A PUMP

An articulating motor stator assembly for use in a pump incorporates features that permit recycling of the motor stator when disposing of other parts of the pump. Such a stator assembly facilitates convenient manufacture, testing, and installation of the pump. For convenient installation, the motor stator assembly can incorporate a multi-part, annular housing that defines a central conduit to receive a motor rotor assembly. The multi-part housing of the motor stator assembly may be selectively repositioned between an open and closed configuration. In its open configuration a motor rotor assembly may be conveniently installed in the motor stator and when closed the motor stator will actuate the motor rotor assembly in order to operate a pump. The assembly thereby enables separate manufacture and shipment from a remote location. In addition, the assembly can be separately tested prior to installation. After pump use, the motor stator can be opened so as to remove the motor rotor assembly.

CATHETER TO ASSIST THE PERFORMANCE OF A HEART

Systems and methods for reducing pressure at an outflow of a duct

Various systems and methods are provided for reducing pressure at an outflow of a duct such as the thoracic duct or the lymphatic duct. In one embodiment, an indwelling catheter can be configured to be at least partially implanted within a vein of a patient in the vicinity of an outflow port of a duct of the lymphatic system. The catheter can include first and second restrictors each configured to at least partially occlude the vein within which the catheter is implanted and thus to restrict fluid flow within the vein when the restrictors are activated. The restrictors can each be configured to move between an activated configuration, in which the restrictor occludes the vein, and a relaxed configuration, in which the restrictor does not occlude the vein. The catheter can include a pump, such as an axial motor pump, configured to pump fluid through the catheter.

Pump device

Blood in-vitro circulation auxiliary device

혈관내 로터리 혈액 펌프

... 본 발명은 혈관내 로터리 혈액 펌프에 관한 것으로, 이 혈액 펌프는 카테터(10), 카테터(1)의 말단에 고정된 펌프 장치(50) 및 펌프 장치(50)에 단단히 연결되고 압력 감지 영역(32)을 갖는 적어도 하나의 압력 센서(30, 60)를 포함하고, 이 압력 감지 영역은환경에노출되고 혈액 펌프의일반적인 종축에 수직으로 배향된다.

PORTABLE CONTROLLER WITH INTEGRAL POWER SOURCE FOR MECHANICAL CIRCULATION SUPPORT SYSTEMS

A portable external device for a mechanical circulation support system includes first and second power sources, e.g. batteries and control electronics for redundant uninterrupted operation of an implantable blood pump. The control and power source module may be configured to accommodate a variety of wearable configurations for patient convenience and comfort.

Cavopulmonary viscous impeller assist device and method

A bearingless and sealless rotary blood pump is disclosed which provides multidirectional flow intended to provide low-pressure, high-volume right-sided partial assist circulatory support in a univentricular Fontan circulation on a permanent basis. The pump includes a housing and an impeller suspended in the center of the housing. The housing incorporates flow optimization features between inlet and outlet ends, as well as with the impeller surface. Large fluid gaps maintained between impeller and housing eliminate any potential for blood flow obstruction. The impeller contains some motor components. It includes a central stator and surrounding rotor. The motor includes a brushless DC outrunner electrical motor design. An electromagnetic stator core is surrounded by a circumferential passive magnetic ring. The rotor is further levitated about the stator spindle by a plurality of axially and radially located passive magnetic and hydrodynamic journal bearings on both ends of the spindle.

Cavopulmonary viscous impeller assist device and method

CAVOPULMONARY VISCOUS IMPELLER ASSIST DEVICE AND An apparatus (20, 120) for pumping blood in the circulatory system of an animal, comprising: a rotor (80, 180) symmetrical about a rotational axis and symmetrical about a plane perpendicular to the rotational axis, said rotor (80, 180) having an outer surface adapted and configured for pumping blood, said rotor (80, 180) having an interior and including a first plurality of permanent magnets (81); a stator (60, 160) including a plurality of electrical windings (64), said windings (64) being located within the interior of said rotor (80, 180) and establishing a radial gap between the magnets (81) and the windings (64), the gap being adapted and configured to discourage clotting of the blood therebetween; a source of electrical power; and an electronic controller operably connecting said source to said winding (64); wherein said rotor (80, 180) spins relative to said stator in response to said controller providing power to said windings (64 ...

Two-stage rotary power blood pump

Compressible motor, implanting assembly and method for positioning the motor

ROTATION DRIVE DEVICE AND CENTRIFUGAL PUMP DEVICE

A centrifugal blood pump apparatus includes an impeller (10) provided in a blood chamber (7), a plurality of permanent magnets (17) provided in the impeller (10), and a plurality of sets of magnetic materials (18) and coils (20) provided in a motor chamber (8) for driving the impeller (10) to rotate with a diaphragm (6) interposed therebetween. The plurality of permanent magnets (17) are aligned with a gap therebetween in a rotation direction of the impeller (10). Accordingly, if the weight of the permanent magnets (17) is maintained at a constant value, a magnetic field can be strengthened even with a wide motor gap due to the diaphragm (6), as compared to an example where there is no gap between the permanent magnets (17).

Rotary blood pump

혈액펌프

... 본 발명은 혈액펌프에 관한 것으로서, 본 발명에 따른 혈액펌프는 상부에 혈액이 유입되는 유입구와 가장자리를 따라 상기 혈액이 방출되는 출구를 구비한 하우징, 상기 하우징의 내측에 회전 가능하게 구비되고, 표면에 다수개의 블레이드를 구비하여 상기 유입구를 통해 유입된 상기 혈액을 원심력에 의해 상기 출구를 향해 이동시키는 임펠러부, 상기 임펠러부의 중앙부를 관통하여 구비되어 상기 임펠러부가 회전 가능하게 지지하며, 상기 혈액을 하부로 이동시키는 회전축 부재 및 상기 임펠러부에 구비되어 상기 하우징 외부의 자기장 변화에 따라 상기 임펠러부를 미리 결정된 방향으로 회전시키는 자성체를 구비하는 것을 특징으로 한다.

Intravascular rotary blood pump

An intravascular rotary blood pump has a catheter (10), a pumping device (50), which is arranged distally from the catheter and has at its distal end a flexible flow cannula (53), through which blood is either sucked in or expelled by the pumping device (50) during the operation of the blood pump, and at least one pressure sensor (27, 28A, 30) having at least one optical fibre (28A), which is laid along the flow cannula (53). In this arrangement, the optical fibre (28A) and possibly a sliding tube (27), in which the optical fibre (28A) is laid, run(s) along a neutral axis of the flow cannula (53).

Device for pumping blood in extracorporeal circuit

원심 혈액 펌프

... 기계적 베어링을 갖지않는 원심 혈액 펌프는 펌프 케이싱(1), 펌프 케이싱 내에 중심축에 대해 회전가능하게 배열되고 제한된 클리어런스 내에서 축방향 및 방사 방향으로 자유롭게 이동가능한 임펠러(9)를 포함한다. 임펠러는 전자기 구동부와 연동하여 임펠러의 회전을 설정하는 영구 자석 또는 영구적으로 자화된 자기 영역(N/S)을 갖는다. 원형 벽(12) 또는 원형으로 배열된 벽부가 펌프 케이싱 내에 제공되며, 이들의 내면은 임펠러의 유체 역학적 방사상 베어링을 형성하도록 임펠러의 외주와 함께 방사상 클리어런스를 규정한다.

SUCTION DETECTION METHODS AND DEVICES

A method of detecting a suction condition during operation of a rotary blood pump with an inlet connected to a ventricle of the heart of a patient, an outlet connected to an artery of the patient, a rotor, and a control circuit configured maintain the rotor at a set rotational speed. The method includes measuring the rotational speed of the rotor at a plurality of times during each of a plurality of speed measurement intervals. A speed range is determined between a minimum measured speed and a maximum measured speed during each of the plurality of speed measurement intervals. At least one additional parameter relating to the operation of the blood pump is derived. A suction detection signal is generated if both at least one determined speed range is above a speed range limit and the at least one additional parameter is indicative of a suction condition. 1. A method of detecting a suction condition during operation of a rotary blood pump with an inlet connected to a ventricle of a heart of a patient , an outlet connected to an artery of the patient , a rotor , and a control circuit configured maintain the rotor at a set rotational speed , the method comprising:(a) measuring the rotational speed of the rotor at a plurality of times during each of a plurality of speed measurement intervals;(b) determining a speed range between a minimum measured speed and a maximum measured speed during each of the plurality of speed measurement intervals;(c) deriving at least one additional parameter relating to the operation of the blood pump; and(d) generating a suction detection signal if both (i) at least one determined speed range is above a speed range limit and (ii) the at least one additional parameter is indicative of a suction condition.2. The method of claim 1 , wherein the speed range limit is a function of the set speed during a respective one of the plurality of speed measurement intervals.3. The method of claim 1 , further comprising determining an error signal based on ...

HYDRODYNAMIC THRUST BEARINGS FOR ROTARY BLOOD PUMP

A rotary blood pump includes a casing defining a pumping chamber. The pumping chamber has a blood inlet and a tangential blood outlet. One or more motor stators are provided outside of the pumping chamber. A rotatable impeller is within the pumping chamber and is adapted to cause blood entering the pumping chamber to move to the blood outlet. The impeller has one or more magnetic regions. The impeller is radially constrained in rotation by magnetic coupling to one or more motor stators and is axially constrained in rotation by one or more hydrodynamic thrust bearing surfaces on the impeller. 126-. (canceled)27. A rotary blood pump comprising:a pumping chamber in fluid communication with a primary fluid flow path;an impeller rotatable on an axis within the pumping chamber and having a plurality of upper surface areas circumferentially disposed about the axis, each upper surface area facing an interior wall of the pumping chamber as the impeller rotates, each of at least a diametrically opposed pair of the upper surface areas being configured with an inclined surface area tapered in an upward axial direction and defining a hydrodynamic bearing surface having a lower pressure fluid entrance end and a higher pressure fluid exit end causing an increase in pressure acting axially downwardly on the impeller as the impeller rotates; andeach of the plurality of upper surface areas further including a pressure relief surface downstream of the higher pressure fluid exit, the pressure relief surface being configured to define a secondary fluid flow path different than the primary fluid flow path, the higher pressure entrance end of the downstream pressure relief surface being spaced from the higher pressure fluid exit end of the hydrodynamic bearing surface by a bridging surface area of the same respective upper surface area therebetween.28. The rotary blood pump of claim 27 , wherein each raised body is configured with two straight sidewalls of unequal length which intersect ...

혈관내 로터리 혈액 펌프

... 혈관내 로터리 혈액 펌프는 카테터(10), 카테터의 말단에 배치되고 그말단부에 가요성 플로우 캐뉼라(53)를 구비하며, 이를 통해 혈액 펌프가 동작하는 동안에 펌핑 장치(50)에 의해 혈액이 흡입되거나 방출되는 펌핑 장치(50), 및 적어도 하나의 광섬유(28A)를 갖고, 플로우 캐뉼라(53)를 따라서 놓이는 적어도 하나의 압력 센서(27, 28A, 30)를 구비한다. 본 장치에서, 광 섬유(28A) 및 아마도 광 섬유(28A)가 놓이는 슬라이딩 튜브(27)는 플로우 캐뉼라(53)의 중립축(neutral axis)을 따라서 이어진다.

SYSTEMS AND METHODS FOR REDUCING PRESSURE AT AN OUTFLOW OF A DUCT

Various systems and methods are provided for reducing pressure at an outflow of a duct such as the thoracic duct or the lymphatic duct. In one embodiment, an indwelling catheter can be configured to be at least partially implanted within a vein of a patient in the vicinity of an outflow port of a duct of the lymphatic system. The catheter can include first and second restrictors each configured to at least partially occlude the vein within which the catheter is implanted and thus to restrict fluid flow within the vein when the restrictors are activated. The restrictors can each be configured to move between an activated configuration, in which the restrictor occludes the vein, and a relaxed configuration, in which the restrictor does not occlude the vein. The catheter can include a pump, such as an axial motor pump, configured to pump fluid through the catheter. 186-. (canceled)87. A catheter for treatment of edema in a subject , the catheter comprising:a hollow body;an expandable membrane along an outside of a portion of the hollow body, the expandable membrane comprising a proximal restrictor and a distal restrictor spaced apart from each other to thereby form a channel through the expandable membrane when expanded; andat least one inlet along a side wall of the expandable membrane between the proximal restrictor and the distal restrictor.88. The catheter of claim 87 , comprising a plurality of inlets along the side wall of the expandable membrane between the proximal restrictor and the distal restrictor.89. The catheter of claim 87 , wherein the hollow body comprises an outlet external to the subject claim 87 , the outlet configured to be coupled to a pump.90. The catheter of claim 87 , wherein the catheter is sized to fit within an introducer sheath.91. The catheter of claim 87 , wherein the distal restrictor and the proximal restrictor each comprises an inflatable balloon coupled to an inflation lumen extending along the hollow body.92. The catheter of claim 91 ...

Method for monitoring an impeller pump used in a medical application

압축 모터, 이식 구조체, 및 모터의 위치특정 방법

... 본 발명은 고정자(2, 2') 및 회전자 (1, 1')를 포함하는 모터에 관한 것으로서, 상기 고정자 및 회전자는 축방향(4)에 대하여 구동 가능하며, 고정자 및 회전자 중 적어도 하나, 특히 고정자는 전류를 공급받을 수 있는 권선구조를 구비하고, 상기 고정자는 방사상으로 압축 및 팽창가능하게 구성된다.

FLEXIBLE CATHETER WITH A DRIVESHAFT

Compressible motor, implantation arrangement, and method for positioning the motor

구동 샤프트를 구비하는 유연성 카테터

... 본 발명은 구동 샤프트(2), 상기 구동 샤프트(2)를 에워싸는 슬리브(6), 상기 구동 샤프트(2)와 슬리브(6)를 에워싸는 유도관(7)을 포함하며, 여기에서 구동 샤프트, 슬리브(6) 및 유도관(7)은 유연성이고, 상기 구동 샤프트(2)가 그 근위단부에서 구동 샤프트(2)를 구동 모터(18)에 연결하기 위한 연결 부재(5)를 구비하는 굴곡성 카테터(1)에 관한 것으로서, 여기에서 구동 샤프트(2)는 적어도 국부적으로, 적어도 10 중량%의 크롬, 니켈 및 코발트를 각각 함유하는 합금으로 구성된다. 또한, 본 발명은 이러한 카테터를 구비하는 혈액 펌프 구조에 관한 것이다.

CATHETER TO ASSIST THE PERFORMANCE OF A HEART

PUMP DEVICE HAVING A DETECTION DEVICE

The invention relates to a pump device having a pump (8) and an energy supply device (5, 18), wherein the pump has a conveying element (9, 11) which conveys a fluid by means of supplied energy, wherein the pump has a transport state and an operating state, and wherein at least one first element (9, 9a, 10, 10', 11) of the pump has a different shape and/or size in the transport state than in the operating state. The operating safety of such a pump device is increased by a detection device (12, 20, 21, 22, 23, 24, 25, 27, 28, 29) which detects whether at least the first element is in the operating state with respect to shape and/or size by means of a sensor.

BLOOD PUMP

The present invention relates to a blood pump capable of preventing blood clot from occurring in a blood pump. The blood pump according to the present invention comprises: a housing having an inlet where blood flows in on an upper part, and an outlet where the blood is discharged along the edge; an impeller unit formed in the housing to be rotatable, having a plurality of blades on the surface and transferring the blood flowing in through the inlet toward the outlet by a centrifugal force; a rotational axis member penetrating the center part of the impeller unit, supporting the impeller unit to be rotatable and transferring the blood to a lower part; and a magnetic formed in the impeller unit and rotating the impeller unit in the predetermined direction according to a change in a magnetic field outside the housing. COPYRIGHT KIPO 2017 ...

Pump device with a detection device

Die Erfindung bezieht sich auf eine Pumpeneinrichtung mit einer Pumpe (8) und einer Energiezuführungseinrichtung (5, 18), wobei die Pumpe ein Förderelement (9, 11) aufweist, das mittels zugeführter Energie ein Fluid fördert, wobei die Pumpe einen Transportzustand und einen Betriebszustand aufweist und wobei wenigstens ein erstes Element (9, 9a, 10, 10', 11) der Pumpe im Transportzustand eine andere Form und/oder Größe aufweist als im Betriebszustand. Die Betriebssicherheit einer solchen Pumpeneinrichtung wird erhöht durch eine Detektionseinrichtung (12, 20, 21, 22, 23, 24, 25, 27, 28, 29), die mittels eines Sensors erfasst, ob wenigstens das erste Element sich bezüglich Form und/oder Größe im Betriebszustand befindet.

Folding device for side curtain airbag and method for folding side curtain airbag using same

Method for the pump device and the pump device

CATHETER PUMP ASSEMBLY INCLUDING A STATOR

A catheter pump assembly is provided that includes a proximal a distal portion, a catheter body, an impeller, and a flow modifying structure. The catheter body has a lumen that extends along a longitudinal axis between the proximal and distal portions. The impeller is disposed at the distal portion. The impeller includes a blade with a trailing edge. The flow modifying structure is disposed downstream of the impeller. The flow modifying structure has a plurality of blades having a leading edge substantially parallel to and in close proximity to the trailing edge of the blade of the impeller and an expanse extending downstream from the leading edge. In some embodiments, the expanse has a first region with higher curvature and a second region with lower curvature. The first region is between the leading edge and the second region.

CATHETER DEVICE

The catheter device comprises a motor located at the proximal end of the catheter device and a drive shaft, extending from the proximal end section to the distal end section of the catheter device, for driving a rotating element located at the distal end of the catheter device. The catheter device also comprises a hose-like catheter body which encompasses the drive shaft and extends from the proximal end section to the distal end section of the catheter device. At the proximal end of the catheter device, the drive shaft is connected to a motor by a clutch. The clutch is a magnetic clutch with a proximal and a distal magnet unit. The proximal magnet unit is connected to the motor and the distal magnet unit to the drive shaft. The distal magnet unit is mounted fluid-tight in a clutch housing. The proximal end of the catheter body makes a fluid-tight connection with the clutch housing. 110-. (canceled)11. A catheter device comprising:a drive shaft having a proximal end and a distal end, wherein the proximal end is coupled to a motor;a compressible and expandable helical rotor mounted to the distal end of the drive shaft, the rotor comprising a rotor blade configured to self-expand from a compressed state to a self-expanded state, wherein the rotor has a length, and wherein the rotor blade has a pitch and forms a helix having a half winding around a central axis collinear with the drive shaft; anda compressible and expandable pump housing disposed around the rotor, the housing having a tubular mesh structure;wherein the pitch of the rotor blade varies along the length of the rotor.12. The catheter device of claim 11 , further comprising a plurality of spacer sleeves mounted on the drive shaft claim 11 , wherein the pitch of the rotor blade is set by the plurality of spacer sleeves claim 11 , wherein at least two of the plurality of spacer sleeves have unequal lengths.13. The catheter device of claim 11 , wherein the rotor comprises a reinforcing structure that centers ...

Method and system for controlling blood pump

Axial flow type blood pump with dislocation design radial permanent magnet bearing

펌프, 특히 혈액 펌프

... 본 발명은 근위단부 및 원위단부와 그 사이에 마련되는 펌프 하우징을 포함하는 펌프, 특히 혈액 펌프에 관한 것으로서, 상기 펌프 하우징의 내부에서 그 길이방향을 따라서 마련되는 구동 샤프트와, 상기 구동 샤프트 상에 마련되는 운반 요소와, 캐뉼라를 구비한다. 여기서, 상기 펌프 하우징과 샤프트 구조 및 운반 요소는 펌프의 가능한 최대의 효율과 내구성(longevity)이 보장되도록 상호 조정된다.

ARTICULATED MOTOR STATOR ASSEMBLY FOR A PUMP

Selon cette invention, un ensemble stator pour moteur articulé destiné à une pompe possède des propriétés qui permettent de réutiliser le stator du moteur lorsqu'on élimine d'autres parties de la pompe. Cet ensemble stator rend plus commodes et aisées la fabrication, la vérification et l'installation de la pompe. Pour une procédure d'installation plus commode, on peut intégrer au stator du moteur un boîtier annulaire composé d'éléments multiples qui délimite une conduite centrale destinée à recevoir un ensemble rotor du moteur. On peut conférer au boîtier à éléments multiples de l'ensemble rotor du moteur une configuration tantôt ouverte, tantôt fermée. En configuration ouverte, un ensemble rotor du moteur peut être installé commodément dans le stator du moteur; en configuration fermée, le stator du moteur active l'ensemble rotor du moteur pour mettre en marche la pompe. Il est ainsi possible de fabriquer et d'expédier cet ensemble depuis un lieu géographique distant. En outre, on peut ...

ARRANGEMENT WITH A BLOOD PUMP, A CONTROL UNIT AND A DEVICE FOR TRANSMITTING THE MEASURED VALUES

An assembly with a blood pump and a control unit to control the flow rate at the blood pump includes a device that is designed to deliver a parameter of the breathing cycle or a parameter associated with the breathing cycle. In this way, it is also made possible for a parameter that correlates to the breathing cycle to be used to control the blood pump, in order to proactively prevent problems associated with the drainage. 121222414246162641424830336162683033. An assembly ( , , ) with a blood pump ( , , ) , a control unit ( , , ) to control the flow rate at the blood pump ( , , ) , and at least one device ( , , ) for transmitting measurement values to the control unit ( , , ) , wherein the device ( , , ) is designed to output a parameter of the breathing cycle or a parameter that is associated with the breathing cycle.24. The assembly according to claim 1 , wherein the blood pump () includes a drive for controlling the output thereof to vary the flow rate.341424. The assembly according to claim 1 , wherein the blood pump ( claim 1 , claim 1 , ) includes a rotor for controlling the rotating speed thereof to vary the flow rate.451525. The assembly according to claim 1 , wherein it includes a gas exchanger ( claim 1 , claim 1 , ).533. The assembly according to claim 1 , wherein the device is an EKG () and the parameter correlates to an impedance of the EKG.68182881828. The assembly according to claim 1 , wherein the device is a ventilator ( claim 1 , claim 1 , ) and the parameter correlates to an inspiratory pressure of the ventilator ( claim 1 , claim 1 , ).7. The assembly according to claim 1 , wherein the device is a chest strap and the parameter correlates to a stretching or tension in the chest strap.8. The assembly according to claim 1 , wherein the device is a piezo element.9. The assembly according to claim 1 , wherein the device is a diaphragm or myocardial sensor.10. The assembly according to claim 1 , wherein the device is a sensory gastric tube. ...

AXIAL FLOW ROTOR WITH DOWNSTREAM BEARING WASH FLOW

An implantable blood pump includes an impeller rotatable about a rotational axis, having a body with a bottom surface at a downstream end and a central opening centered about the axis extending at least partially through the body from the bottom surface. A projecting element, e.g., a shaft, extends from below the bottom surface into or through the opening to support the impeller. The body can be configured to drive a primary downstream blood flow along an exterior of the body to beyond a peripheral edge of the bottom surface, and to provide a secondary downstream blood flow through the opening and along the bottom surface to beyond the peripheral edge, the secondary flow improving washing of a bearing surface. 1. An impeller for a blood pump , comprising:a ferromagnetic body having a bottom surface at a downstream end of the body and a central opening extending at least partially through the body from the bottom surface, the central opening centered about a rotational axis of the body, the rotational axis defining an axial direction; andthe body configured to rotate about an element projecting from a surface below the bottom surface into the opening to drive a primary blood flow along an exterior of the body to beyond a peripheral edge of the bottom surface, and the body configured to drive a secondary blood flow through the opening toward the bottom surface and then outwardly along the bottom surface to beyond the peripheral edge, the bottom surface undulates in a direction of a circumference of the bottom surface between each of at least one trough and at least one respective elevation, the at least one trough and a least one elevation of the bottom surface configured to drive the secondary flow of the fluid towards the peripheral edge of the bottom surface.2. The impeller of claim 1 , wherein the undulations of the body define a plurality of ridges protruding in an axial direction below portions of the bottom surface claim 1 , the ridges defining a plurality of ...

HEART FAILURE RECOVERY DEVICE AND METHOD OF TREATMENT

A heart failure recovery device includes a fluid pump having an inlet and an outlet in fluid communication with a pump reservoir, and a pumping element disposed within the pump reservoir, the pumping element including a protrusion that in an active state is configured to rotate and move fluid away from the inlet and towards the outlet. A receiver coil can be electrically coupled to the fluid pump and is configured to subcutaneously absorb electromagnetic energy for powering the fluid pump. In certain embodiments, an implantable port provides fluid access to the pump reservoir for cleaning and maintaining the fluid pump. In other embodiments, a valve closes fluid access to at least one of the inlet and the outlet during periods when the device is not being used for treatment. 1. A heart failure recovery device comprising:a fluid pump comprising an inlet and an outlet in fluid communication with a pump reservoir, and a pumping element disposed within the pump reservoir, the pumping element comprising a protrusion that in an active state is configured to rotate and move fluid away from the inlet and towards the outlet;a receiver coil electrically coupled to the fluid pump, the receiver coil configured to subcutaneously absorb electromagnetic energy for powering the fluid pump; anda valve configured to open in the active state and fluidly seal at least one of the inlet and the outlet in an inactive state.2. A system comprising the heart failure recovery device of claim 1 , the system comprising:an external coil configured to send electromagnetic energy to the receiver coil for powering the fluid pump while the receiver coil is implanted subcutaneously.3. The heart failure recovery device of claim 1 , wherein the pumping element comprises an impeller.4. The heart failure recovery device of claim 3 , wherein the pump reservoir has a substantially circular cross-sectional profile.5. The heart failure recovery device of claim 1 , wherein the valve is an iris valve.6. The ...

CIRCULATORY ASSIST PUMP

A minimally invasive circulatory support platform that utilizes an aortic stent pump or pumps. The platform uses a low profile catheter-based techniques and provides temporary and chronic circulatory support depending on the needs of the patient. Also described is a catheter-based temporary assist pump to treat patients with acute decompensated heart failure and provide circulatory support to subjects undergoing high risk percutaneous coronary intervention (“PCI”). Further described is a wirelessly powered circulatory assist pump for providing chronic circulatory support for heart failure patients. The platform and system are relatively easy to place, have higher flow rates than existing systems, and provide improvements in the patient's renal function. 1. A system for a circulatory assist pump , which system maintains arterial pulsatility , the system comprising:a stent cage of a size and shape to allow a highly open flow when placed within a subject's aorta, and further of a circumference sized to be stable against the subject's aortic wall while allowing the subject's aorta to maintain its natural pulsatility, anda circulatory assist pump, encaged by the stent cage, the circulatory assist pump comprising: an impeller system of arm-like impeller blades that during operation rotate to draw blood down the aorta from the subject's heart,wherein, when the system is positioned and operated in the aorta proximal and above the renal arteries of the subject, natural pulsatility of the subject's heart beat in the aorta is maintained.2. (canceled)3. The system of claim 1 , wherein the circulatory assist pump comprises a cam lobe design to expand and withdraw the arm-like impeller blades into and out of a catheter associated with the cam.4. The system of claim 1 , further comprising a drive shaft and drive shaft lubrication system for the impeller system.5. The system of claim 4 , wherein the impeller system has an ePTFE liner.6. The system of claim 1 , further comprising a ...

Circulatory support devic

A circulatory support device includes a flexible cannula having a fluid outlet at a proximal end; and a pump assembly disposed at a distal end of the flexible cannula. The pump assembly includes a pump housing having a fluid inlet defined therein; a motor disposed within a distal end of the housing; and an impeller, driven to rotate by the motor, and configured to push blood toward the fluid outlet.

Transcatheter insertion device and method

The present invention relates to a transcatheter method for providing fluid communication between two anatomical compartments. The present invention also relates to a transcatheter system comprising an intracorporeal connector for fluid communication between two anatomical compartments through at least one anatomical wall, wherein said connector is adapted to receive a flow regulating device, a connector, a flow regulating device and an insertion device.

COMPRESSIBLE MOTOR, IMPLANTATION ARRANGEMENT, AND METHOD FOR POSITIONING THE MOTOR

The invention relates to a motor with a stator (′) and a rotor (′), which can be driven about an axial direction (). The invention is characterized in that at least one of the stator and the rotor, in particular the stator, which has a winding arrangement that can be supplied with a current, can be radially compressed and expanded. 121-. (canceled)22. A motor , comprising:a rotor that can be driven about an axial direction; anda stator, which has a winding arrangement that can be supplied with a current,wherein the rotor is connected to a pump rotor such that the rotor and the pump rotor rotate jointly about the same axial direction,wherein the stator and pump rotor are each radially compressible and expandable, andwherein the winding arrangement has at least one sub-winding, which is reversibly deformable.23. The motor according to claim 22 , wherein the rotor and the stator can be displaced relative to one another in the axial direction between a first position claim 22 , in which the stator is radially compressible claim 22 , and a second position claim 22 , in which the stator is radially expanded.24. The motor according to claim 22 , wherein the stator and the pump rotor can be arranged axially in succession such that the stator and pump rotor are jointly radially compressible.25. The motor according to claim 22 , wherein the pump rotor comprises blades which fold around the axis of the rotor when the pump rotor is compressed.26. The motor according to claim 22 , wherein the pump rotor is formed from a resilient hyperelastic plastics material.27. The motor according to claim 22 , wherein the pump rotor is configured to collapse when the stator is compressed.28. The motor according to claim 22 , wherein the pump rotor is configured to resiliently or hyperelastically expand when the stator expands.29. The motor according to claim 22 , wherein the rotor has a plurality of magnet elements claim 22 , which are reversibly movable relative to one another.30. The motor ...

Methods and devices for identifying suction events

The present disclosure provides for a method, control device, and implantable system, for acquiring a plurality of flow rate data points over time, each data point indicative of a flow rate of blood through the pump, calculating, based on the plurality of acquired flow rate data points, a value characterizing one or more features of a waveform formed from the plurality of flow rate data points; and determining, based on the value, the presence or absence of a suction condition in the pump.

TRANSCATHETER SYSTEM AND METHOD FOR REGULATING FLOW OF FLUID BETWEEN TWO ANATOMICAL COMPARTMENTS

The present invention relates to a transcatheter method for providing fluid communication between two anatomical compartments. The present invention also relates to a transcatheter system comprising an intracorporeal connector for fluid communication between two anatomical compartments through at least one anatomical wall, wherein said connector is adapted to receive a flow regulating device, a connector, a flow regulating device and an insertion device. 1. A transcatheter system comprising an intracorporeal flow regulating device for regulating the flow of fluid between two anatomical compartments through at least one anatomical wall , wherein the flow regulating device comprises means for intracorporeally securing the flow regulating device to an connector intracorporeal connector positioned through said anatomical wall(s).2. The system according to claim 1 , wherein the flow regulating device comprises an actuator to allow or prevent fluid flow through the intracorporeal connector.3. The system according to claim 1 , wherein the flow regulating device comprises a first portion located in use in the first compartment claim 1 , a second portion located in use in the second compartment claim 1 , and an intermediate portion located in use through the anatomical wall(s).4. The system according to claim 3 , wherein the first portion and/or the second portion comprises one or more apertures for fluid passage from the first compartment to the second compartment.5. The system according to claim 3 , wherein the first portion comprises a cross-section of larger diameter than the diameter of the cross-section of the intermediate portion.6. The system according to claim 1 , wherein when the flow regulating device is coupled to the connector claim 1 , fluid can flow from the first compartment to the second compartment claim 1 , and when the flow regulating device is not coupled to the connector claim 1 , fluid is prevented from flowing from the first compartment to the second ...

VENTRICULAR ASSIST DEVICES AND INTEGRATED SENSORS THEREOF

A ventricular assist device for intraventricular placement inside a heart of a mammalian subject includes a pump including a housing having an inlet end, an inlet at the inlet end, and an outlet. The pump further includes a moveable element disposed in the pump housing for pumping blood from the inlet to the outlet. A base member is included as well as a spacer member connected to the pump housing and the base member. The base member is positioned a distance from the inlet end of the pump housing to define a gap therebetween. One or more sensor elements are mounted to at least one from the group consisting of the base member and the housing, the one or more sensor elements being configured to measure one or more blood parameters prevailing within the gap during operation of the pump. 1. A ventricular assist device for intraventricular placement inside a heart of a mammalian subject comprising:a pump including a housing having an inlet end, an inlet at the inlet end, and an outlet, the pump further including a moveable element disposed in the pump housing for pumping blood from the inlet to the outlet;a base member;a spacer member connected to the pump housing and the base member, the base member being positioned a distance from the inlet end of the pump housing to define a gap therebetween; andone or more sensor elements mounted to at least one from the group consisting of the base member and the housing, the one or more sensor elements being configured to measure one or more blood parameters prevailing within the gap during operation of the pump.2. The device of claim 1 , wherein the one or more sensor elements include a first sensor element mounted to the pump housing and a second sensor element mounted to the base member.3. The device of claim 2 , wherein the first and second sensor elements are ultrasonic transducers.4. The device of claim 3 , wherein the pump inlet has a major longitudinal axis claim 3 , and wherein the ultrasonic transducers are disposed on ...

GUIDABLE INTRAVASCULAR BLOOD PUMP AND RELATED METHODS

An improved intravascular blood pump and related methods involving the broad inventive concept of equipping the intravascular blood pump with guiding features such that the intravascular blood pump can be selectively positioned at a predetermined location within the circulatory system of a patient. 1. (canceled)2. A method for perfusing a patient with an intravascular blood pump system , the intravascular blood pump system comprising:an intravascular blood pump comprising a rotor having a rotor hub tapering in a distal direction, at least one blade extending outward from the rotor hub, the rotor hub having a distal end extending distally beyond a most distal portion of the at least one blade and a shroud within which the rotor is rotatably disposed;a cannula extending from the shroud and comprising an outer cannula surface, the outer cannula surface having a substantially circular cross-section along a portion of its length; progressing the guide wire to a predetermined location in the circulatory system of the patient; and', 'advancing the intravascular blood pump system along the guide wire to the predetermined location., 'a guide mechanism comprising a lumen having a proximal end and a distal end, the guide mechanism adapted to guide a distal portion of said intravascular blood pump system to a predetermined location within a circulatory system of the patient, wherein an axis coaxial with and extending through a portion of said guide mechanism extends through a region delimited by the outer cannula surface, and wherein the guide mechanism is configured to allow for a guide wire to slideably advance therealong, the method comprising the steps of3. The method of claim 2 , wherein the guide mechanism is configured such that the guide wire passes through the region delimited by the outer cannula surface at a location proximal to where the guide wire establishes slidable contact with the guide mechanism.4. The method of claim 2 , wherein the intravascular blood pump ...

EXTRACORPOREAL AMBULATOR ASSIST LUNG

A extracorporeal system for lung assist includes a housing, a blood flow inlet in fluid connection with the housing; a blood flow outlet in fluid connection with the housing; a plurality of hollow gas permeable fibers adapted to permit diffusion of gas between blood and an interior of the hollow gas permeable fibers, the plurality of hollow gas permeable fibers being positioned between the blood flow inlet and the blood flow outlet such that blood flows around the plurality of hollow gas permeable fibers when flowing from the blood flow inlet to the blood flow outlet; a gas inlet in fluid connection with the housing and in fluid connection with inlets of the plurality of hollow gas permeable fibers; a gas outlet in fluid connection with the housing and in fluid connection with outlets of the plurality of hollow gas permeable fibers; and at least one moving element to create velocity fields in blood flow contacting the plurality of hollow gas permeable fibers. The plurality of hollow gas permeable fibers may extend generally perpendicular to the direction of bulk flow of blood through the housing. 1. A extracorporeal system for lung assist comprising:a housing,a blood flow inlet in fluid connection with the housing;a blood flow outlet in fluid connection with the housing;a plurality of hollow gas permeable fibers adapted to permit diffusion of gas between blood and an interior of the hollow gas permeable fibers, the plurality of hollow gas permeable fibers being positioned between the blood flow inlet and the blood flow outlet such that blood flows around the plurality of hollow gas permeable fibers when flowing from the blood flow inlet to the blood flow outlet, the plurality of hollow gas permeable fibers extending generally perpendicular to the direction of bulk flow of blood through the housing;a gas inlet in fluid connection with the housing and in fluid connection with inlets of the plurality of hollow gas permeable fibers;a gas outlet in fluid connection with ...

BLOOD PUMP CATHETER WITH DUAL-FUNCTION CONTINUOUS LUMEN

Apparatus and methods are described including a blood pump catheter that includes an axial shaft, and an impeller disposed on the axial shaft. A motor drives the impeller to pump blood, by rotating the impeller. A drive cable extends from the motor to the axial shaft, the drive cable being configured to impart rotational motion from the motor to the impeller by rotating. A distal tip portion is disposed at a distal end of the blood pump catheter. The drive cable, the axial shaft, and the distal tip portion define a continuous lumen therethrough from outside the subject's body to the distal end of the blood pump catheter. The continuous lumen facilitates insertion of the blood pump catheter into the subject's body over a guidewire, and, subsequently, provides a channel through which the purging fluid flows. Other applications are also described. 1. An apparatus for use with a guidewire and purging fluid , the apparatus comprising: an axial shaft;', 'an impeller disposed on the axial shaft;', "a motor configured to be disposed outside a body of a subject, and configured to drive the impeller to pump blood within the subject's body, by rotating the impeller;", "a drive cable configured to extend from outside the subject's body to the axial shaft, the drive cable being configured to impart rotational motion from the motor to the impeller by rotating; and", 'a distal tip portion disposed at a distal end of the blood pump catheter,', ["to facilitate insertion of the blood pump catheter into the subject's body over the guidewire, and", 'subsequently to provide a channel through which the purging fluid flows., "wherein the drive cable, the axial shaft and the distal tip portion define a continuous lumen therethrough from outside the subject's body to the distal end of the blood pump catheter, the continuous lumen being configured:"}], 'a blood pump catheter comprising2. The apparatus according to claim 1 , wherein the blood pump catheter comprises a left ventricular assist ...

SENSOR FOR BLOOD PUMP

Apparatus and methods are described including a blood pump that includes an impeller, and a motor configured to drive the impeller to pump blood by rotating the impeller. The impeller is configured to undergo axial motion, in response to changes in a pressure against which the impeller is pumping. A sensor detects the axial motion of the impeller, and generates a sensor signal in response thereto. A computer processor receives the sensor signal and generates an output in response thereto. Other applications are also described. 1. An apparatus comprising: an impeller;', 'a motor configured to drive the impeller to pump blood by rotating the impeller, the impeller being configured to undergo axial motion, in response to changes in pressure against which the impeller is pumping;', 'a sensor configured to detect the axial motion of the impeller, and to generate a sensor signal in response thereto; and', 'a computer processor configured to receive the sensor signal and to generate an output in response thereto., 'a blood pump comprising2. The apparatus according to claim 1 , wherein the impeller is configured to undergo axial back-and-forth motion in response to cyclical changes in pressure against which the impeller is pumping.3. The apparatus according to claim 1 , wherein the computer processor is configured to generate an output indicating a cardiac cycle of the subject claim 1 , in response to receiving the sensor signal.4. The apparatus according to claim 1 , wherein the computer processor is configured to change a rate of rotation of the impeller claim 1 , at least partially based upon the sensor signal.5. The apparatus according to claim 1 , wherein the blood pump catheter comprises a left ventricular assist device claim 1 , and wherein the impeller is configured to pump blood from a left ventricle of the subject to an aorta of the subject.6. The apparatus according to claim 5 , wherein the impeller is configured to undergo axial back-and-forth motion in response ...

Tube for ventricular assist device

Apparatus and methods are described including a ventricular assist device that includes a tube configured to traverse a subject's aortic valve. The tube defines a generally-cylindrical central portion, and a proximal conical portion that narrows from a proximal end of the central portion to a proximal end of the tube. The tube defines one or more blood inlet openings in a vicinity of a distal end of the tube, and one or more blood outlet openings that extend axially from the central portion of the tube at least partially into the proximal conical portion of the tube. A blood pump pumps blood into the tube from the subject's left ventricle through the one or more blood inlet openings, and from the tube into the aorta through the one or more blood outlet openings. Other applications are also described.

AXIAL FLOW PUMP WITH MULTI-GROOVED ROTOR

An axial-flow blood pump for pumping blood includes a substantially cylindrical outer enclosure. A tubular housing concentric with and located within the outer enclosure has at one end an inlet and at an opposite end an outlet. A motor stator is concentric with and located between the outer enclosure and the tubular housing. An impeller is concentric with and located within the tubular housing. The impeller is suspended in operation by a combination of passive magnetic forces between magnets within the impeller or magnetized regions of the impeller and the motor stator and hydrodynamic thrust forces generated as blood flows between the tubular housing and a plurality of hydrodynamic thrust bearing surfaces located on the impeller. A volute may be in fluid-tight connection with the outlet of the tubular housing for receiving blood in the axial direction and directing blood in a direction normal to the axial direction. The volute has a flow-improving member extending axially from the volute and into and coaxially with the tubular housing. 146-. (canceled)47. A blood pump , comprising:a pump housing;a rotor positioned within the housing, the rotor having an axis of rotation, a leading edge at an upstream end of the rotor and a trailing edge at a downstream end of the rotor, the rotor comprising peripheral land surfaces defined by one or more flow channels extending from the leading edge to the trailing edge, a collective width of the flow channels in a circumferential direction of the rotor at each of a plurality of axial positions on a radial periphery of the rotor being less than a collective total width of the peripheral land surfaces in the circumferential direction at the plurality of axial positions, the rotor further having a hydrodynamic bearing surface configured to enable the rotor to rotate freely suspended, the rotor including a plurality of magnetic poles; anda stator including an electrically activated coil configured to magnetically interact with the ...

HEART RATE DETERMINATION BASED ON VAD CURRENT WAVEFORM

The present disclosure provides for methods and systems for determining heart rate of a patient. Based on motor current signals of a ventricular assist device (VAD), each of first, second and third events in the measured current signal may be detected, the first event being indicative of a rise or fall in the current signal, the second event being indicative of a rise or fall in the current signal in the opposite direction as the first event, and the third event being indicative of a rise or fall in the current signal in the same direction as the first event. A timer counter may be initiated upon detection of the first event, and an elapsed time may be measured upon detection of the third event. Heart rate may be determined based on the elapsed time of the timer counter. 1. A method of determining heart rate of a patient having an implantable blood pump , comprising:measuring a motor current signal of the implantable blood pump, the implantable blood pump being in fluid communication with a ventricle of the patient's heart;detecting a first event in the measured current signal, the first event being indicative of one from the group consisting of a rise in the current signal and a fall in the current signal;initiating a timer counter when detecting the first event;detecting a second event in the measured current signal, the second event being indicative of one from the group consisting of a rise in the current signal and a fall in the current signal in the opposite direction as the first event;detecting a third event in the measured current signal, the third event being indicative of one from the group consisting of a rise in the current signal and a fall in the current signal in the same direction as the first event;measuring an elapsed time of the timer counter when detecting the third event; anddetermining the heart rate of the patient based on the elapsed time of the timer counter.2. The method of claim 1 , wherein detecting the second event is initiated after ...

AXIAL FLOW PUMP WITH MULTI-GROOVED ROTOR

An axial-flow blood pump for pumping blood includes a substantially cylindrical outer enclosure. A tubular housing concentric with and located within the outer enclosure has at one end an inlet and at an opposite end an outlet. A motor stator is concentric with and located between the outer enclosure and the tubular housing. An impeller is concentric with and located within the tubular housing. The impeller is suspended in operation by a combination of passive magnetic forces between magnets within the impeller or magnetized regions of the impeller and the motor stator and hydrodynamic thrust forces generated as blood flows between the tubular housing and a plurality of hydrodynamic thrust bearing surfaces located on the impeller. A volute may be in fluid-tight connection with the outlet of the tubular housing for receiving blood in the axial direction and directing blood in a direction normal to the axial direction. The volute has a flow-improving member extending axially from the volute and into and coaxially with the tubular housing. 146-. (canceled)47. A blood pump comprising:a cannula defining a pump chamber lumen;a rotor within said lumen rotatable on a rotation axis concentric with said lumen and having a blood upstream end and a blood downstream end, said rotor having magnetic drive poles by which said rotor is rotated and being configured to direct blood flow axially within said lumen said rotor having one or more of each of a magnetic and hydrodynamic bearing surface to enable said rotor to rotate freely suspended within said lumen, and a tapered axial extension at said blood downstream end to enhance downstream blood flow characteristics in an axial direction when said rotor is rotating;a magnetic stator ring surrounding a portion of said lumen within which said rotor is centered;a volute in fluid flow communication with said pump chamber lumen downstream of said tapered axial extension of said rotor to minimize thrombus and increase pressure of pumped ...

VENTRICULAR ASSIST DEVICES

An implantable blood pump includes a control unit storing patient specific settings. The control unit is configured to store patient specific settings. The patient specific settings can be used to determine a target operating speed for the blood pump and/or a target operating mode for the blood pump. The patient specific settings can include at least one of an operating mode for the pump, a set speed for the pump, a lower speed limit for the pump, a patient hematocrit value, a patient hematocrit date, a patient blood density, and a periodic log rate for event and periodic data. 1. A mechanical circulatory assist system , comprising:an implantable blood pump configured to supplement or replace a pumping function of a heart;an implantable control unit communicatively coupled with the blood pump and storing one or more preprogrammed patient specific settings on which control of the blood pump is based; anda non-implanted external control unit configured to be operatively coupled with the implantable blood pump and to control the implantable blood pump based on one or more event based rules and at least one of the one or more preprogrammed patient specific settings communicated to the external control unit by the implantable control unit.2. The mechanical circulatory assist system of claim 1 , wherein:the one or more event based rules comprise one or more event based rules for determining a target speed for the implantable blood pump; andthe non-implanted external control unit controls the implantable blood pump to operate at the target speed.3. The mechanical circulatory assist system of claim 2 , wherein:the one or more preprogrammed patient specific settings comprise a target running mode for the implantable blood pump; andthe target speed is set to zero if the target running mode for the implantable blood pump is set as stopped.4. The mechanical circulatory assist system of claim 2 , wherein:the one or more preprogrammed patient specific settings comprise a patient- ...

GUIDABLE INTRAVASCULAR BLOOD PUMP AND RELATED METHODS

An improved intravascular blood pump and related methods involving the broad inventive concept of equipping the intravascular blood pump with guiding features such that the intravascular blood pump can be selectively positioned at a predetermined location within the circulatory system of a patient. 1. (canceled)2. An intravascular blood pump system , comprising: a rotor having a rotor hub tapering in a distal direction, at least one blade extending outward from the rotor hub, the rotor hub has a distal end extending distally beyond the most distal portion of the at least one blade and', 'a shroud within which the rotor is rotatably disposed;', 'a cannula extending from the shroud and comprising an outer cannula surface, the outer cannula surface having a substantially circular cross-section along a portion of its length;', 'a guide mechanism comprising a lumen having a proximal end and a distal end, the guide mechanism adapted to guide a distal portion of said intravascular blood pump system to a predetermined location within a circulatory system of a patient;', 'wherein an axis coaxial with and extending through a portion of said guide mechanism extends through a region delimited by the outer cannula surface, and wherein the guide mechanism is configured to allow for a guide wire to slideably advance therealong., 'an intravascular blood pump comprising3. The intravascular blood pump system of claim 2 , wherein the guide mechanism is configured such that the guide wire passes through the region delimited by the outer cannula surface at a location proximal to where the guide wire establishes slidable contact with the guide mechanism.4. The intravascular blood pump system of claim 2 , further comprising:an elongate catheter extending proximally with respect to the intravascular blood pump; anda blood pressure detection mechanism comprising a fluid column disposed within the elongate catheter and configured to detect a pressure of blood proximate the intravascular ...

Intravascular pump with proximal and distal pressure or flow sensors and distal sensor tracking

The present invention provides an intravascular blood pump comprising a pump assembly without a flow inducer or diffuser, and proximal and distal flow rate or pressure sensors, wherein the distal flow rate or pressure sensor may be tracked distal to the impeller after placement of the blood pump within the patient's vasculature.

INTRAVASCULAR PUMP WITH EXPANDABLE REGION AT LEAST PARTIALLY COLLAPSIBLE INTO RECESSES DEFINED BETWEEN IMPELLER BLADES

The present invention provides an intravascular blood pump comprising a housing that is at least partially expandable and collapsible and having an impeller with one or more blades attached thereto. The housing having spanning sections that are aligned with the blade(s) and adapted to collapse into recesses or spaces defined or provided between or along the blade(s) and along the central rotor to which the blade(s)s are attached. 1. A blood pump having a housing and comprising:an impeller assembly comprising a central rotor and at least one blade disposed therealong and defining at least one blade recess defined along the central rotor, the impeller assembly operationally connected with a rotational motor adapted to rotate the impeller assembly;the blood pump housing comprising a collapsible and expandable region comprising two or more spanning sections disposed at least partially over the impeller assembly, wherein each spanning section is configured to align with and collapse into, and expand out of, one of the at least one blade recesses.2. The blood pump of claim 1 , further comprising a push and/or pull wire operatively connected with each spanning section claim 1 , wherein the push and/or pull wire is adapted to move each spanning section to an expanded configuration and a position that does not interfere with the rotation of the impeller.3. The blood pump of claim 2 , wherein pulling the push and/or pull wire moves the two or more spanning sections to a collapsed position within the blade recess that will interfere with the rotation of the impeller.4. The blood pump of claim 1 , wherein each of the two or more spanning sections are biased to collapse to a position within one of the at least one blade recesses.5. The blood pump of claim 4 , further comprising a push and/or pull wire operatively connected with each spanning section and adapted to move each of the two or more spanning sections radially outward from the biased position to a position that will not ...

INTRAVASCULAR PUMP WITH EXPANDABLE AND COLLAPSIBLE INLET REGION AND METHODS THEREOF

The present invention provides an intravascular blood pump comprising a housing region that may be expandable and collapsible, wherein the expandable housing region includes the inlet to the pump and wherein the distal diameter of the expandable housing region, including the inlet, is larger than a proximal diameter of the expandable housing region. A non-expandable region may be provided and disposed between the expandable housing region and the pump assembly of the intravascular blood pump. 1. A blood pump comprising:an impeller assembly; a housing defining a lumen therethrough,', 'an inner diameter, and a', 'an outer diameter, wherein the non-expandable region is disposed distal to, and in fluid communication with, the impeller assembly; and, 'a non-expandable region comprising'} a housing defining a lumen therethrough,', 'a proximal end with an outer diameter and an inner diameter, and', 'a distal end with an outer diameter and an inner diameter,, 'a collapsible and expandable region disposed distal to, and in fluid communication with, the non-expandable region and comprising'}wherein collapsible and expandable region is adapted to expand to an expanded configuration wherein the inner diameter of the distal end of the collapsible and expandable region is greater than the inner diameter of the proximal end of the collapsible and expandable region.2. The blood pump of claim 1 , wherein the outer diameter of the distal end of the collapsible and expandable region is greater than the outer diameter of the proximal end of the collapsible and expandable region.3. The blood pump of claim 1 , wherein the distal end of the collapsible and expandable region comprises an inlet.4. The blood pump of claim 1 , wherein the collapsible and expandable region comprises a single region having an inner diameter that decreases from the distal end of the collapsible and expandable region to the proximal end of the collapsible and expandable region.5. The blood pump of claim 4 , ...

Blood pump housing component

Blood pump assemblies and methods of manufacturing and operating blood pump assemblies are provided. The blood pump assembly includes a pump and an impeller blade rotatably coupled to the pump. The blood pump assembly also includes a pump housing component sized for passage through a body lumen and coupled to the pump. The pump housing component includes a peripheral wall extending about a rotation axis of the impeller blade. The peripheral wall includes an inner peripheral wall surface and an outer peripheral wall surface. The peripheral wall also includes one or more blood exhaust apertures. Each blood exhaust aperture in the one or more blood exhaust apertures is defined by an inner aperture edge and an outer aperture edge. Each inner aperture edge is chamfered between the inner peripheral wall surface and the outer peripheral wall surface.

AXIAL FLOW PUMP WITH MULTI-GROOVED ROTOR

An axial-flow blood pump for pumping blood includes a substantially cylindrical outer enclosure. A tubular housing concentric with and located within the outer enclosure has at one end an inlet and at an opposite end an outlet. A motor stator is concentric with and located between the outer enclosure and the tubular housing. An impeller is concentric with and located within the tubular housing. The impeller is suspended in operation by a combination of passive magnetic forces between magnets within the impeller or magnetized regions of the impeller and the motor stator and hydrodynamic thrust forces generated as blood flows between the tubular housing and a plurality of hydrodynamic thrust bearing surfaces located on the impeller. A volute may be in fluid-tight connection with the outlet of the tubular housing for receiving blood in the axial direction and directing blood in a direction normal to the axial direction. The volute has a flow-improving member extending axially from the volute and into and coaxially with the tubular housing. 1. A blood pump , comprising:a pump housing;a rotor for pumping blood positioned in said housing, said rotor having an axis of rotation and a leading edge and a trailing edge and comprising peripheral land surfaces defined by one or more flow channels extending from said leading edge to said trailing edge, said channels being curved to drive blood in an axial direction as the rotor is rotated, the collective width of said channels at some axial positions on the radial periphery of the rotor being substantially equal to or less than the collective total width of said peripheral land surfaces; anda motor including a plurality of magnetic poles carried by the rotor, and a stator including an electrically activated coil to magnetically interact with said magnetic poles to cause said rotor to rotate.246-. (canceled) The present disclosure relates to rotary pumps and, in particular, to axial flow blood pumps having a generally cylindrical ...

GENERATING ARTIFICIAL PULSE

In order to produce a pulsatile blood flow pattern that includes time periods of relatively high blood flow rates and time periods of relatively low blood flow rates, the operating speed of a blood pump can be selectively controlled to produce an operating speed pattern that includes time periods of relatively high rotation speeds and periods of relatively low rotation speeds. For example, the blood pump is rotated at a first speed for a first period of time. The speed of the blood pump is then decreased from the first speed to a second speed and is operated at the second speed for a second amount of time. The speed of the blood pump is then decreased to a third speed for a third amount of time. If desired, the operating speed pattern can be repeated to continue the pulsatile blood flow pattern. 1. A method of controlling an implantable blood pump , the method comprising:operating the implantable blood pump in an artificial pulse mode for a first period of time;transmitting a first signal to the implantable blood pump to transition the implantable blood pump from the artificial pulse mode to a perturbation mode;operating the implantable blood pump in the perturbation mode for a second period of time;transmitting a second signal to the implantable blood pump to transition the implantable blood pump from the perturbation mode to the artificial pulse mode; andoperating the implantable blood pump back in the artificial pulse mode.2. The method of claim 1 , wherein operating the implantable blood pump in the perturbation mode comprises:operating the implantable blood pump at a low speed for a first speed period;increasing the speed of the implantable blood pump from the low speed to a high speed; andoperating the implantable blood pump at the high speed for a second speed period.3. The method of claim 2 , further comprising operating the implantable blood pump at an intermediate speed for a third period of time.4. The method of claim 3 , wherein the intermediate speed is ...

GUIDABLE INTRAVASCULAR BLOOD PUMP AND RELATED METHODS

An improved intravascular blood pump and related methods involving the broad inventive concept of equipping the intravascular blood pump with guiding features such that the intravascular blood pump can be selectively positioned at a predetermined location within the circulatory system of a patient. 1. (canceled)2. An intravascular blood pump system , comprising:a blood pump adapted to be guided to a predetermined location within a circulatory system of a patient by a guide wire and configured to provide left-heart support, the blood pump comprising a rotor having a rotor hub and at least one blade extending outward from the rotor hub;a rotor shroud at least partially disposed about the rotor hub;an elongate catheter extending proximally with respect to the blood pump;a cannula extending from the rotor shroud and comprising an outer cannula surface, the outer cannula surface having a substantially circular cross-section along a portion of its length, wherein a distal portion of the rotor shroud having an outer diameter matching an inner diameter of a proximal portion of the cannula, the proximal portion of the cannula disposed about a distal portion of the rotor shroud, and wherein at least a proximal portion of the rotor shroud has the same outer diameter as the proximal portion of the cannula;one or more first ports and one or more second ports establishing fluid communication between a cannula lumen and an exterior region of the cannula, wherein at least one first port of the one or more first ports is located in proximity to the rotor and at least one second port of the one or more second ports is spaced apart from and located distal to the at least one first port, wherein the cannula is configured such that when the blood pump is positioned in the patient to provide left-heart support a distal end of the cannula and the at least one second port are positioned inside the patient's heart and a proximal end of the cannula and the at least one first port are ...

CATHETER PUMP

A catheter pump is provided that includes a rotatable impeller and an elongate cannula. The elongate cannula has a mesh that has a plurality of circumferential members disposed about the impeller. The elongate cannula has a plurality of axial connector extending between a proximal side of a distal circumferential member and a distal side of a proximal circumferential member. The circumferential members are radially self-expandable. The cannula is configured to minimize fracture within at least in the distal zone of the mesh as the elongated cannula moves into a sheathing device. 1. A catheter pump assembly , comprising:an elongate body having a distal end and a proximal end opposite the distal end;an expandable cannula coupled with the distal end of the elongate body, the expandable cannula comprising a mesh structure that includes a plurality of struts defining an impeller zone and a plurality of helical zones extending at least proximate the impeller zone; andan impeller coupled with the distal end of the elongate body and having a stowed configuration and an expanded configuration, the impeller configured to rotate within the impeller zone of the expandable cannula in the expanded configuration to induce fluid flow within the expandable cannula.2. The catheter pump assembly of claim 1 , wherein each strut of the plurality of struts is disposed axially adjacent at least one other strut of the plurality of struts claim 1 , and wherein each strut extends one of distally or proximally in an alternating pattern about a circumference of the expandable cannula.3. The catheter pump assembly of claim 2 , wherein each helical zone of the plurality of helical zones is further defined at least partially between parallel struts of the plurality of struts.4. The catheter pump assembly of claim 2 , wherein each strut extends one of distally or proximally in the alternating pattern to define an undulating pattern of distally oriented apices and proximally oriented apices5. The ...

CATHETER PUMP

A catheter pump is provided that includes a rotatable impeller and an elongate cannula. The elongate cannula has a mesh that has a plurality of circumferential members disposed about the impeller. The elongate cannula has a plurality of axial connector extending between a proximal side of a distal circumferential member and a distal side of a proximal circumferential member. The circumferential members are radially self-expandable. The cannula is configured to minimize fracture within at least in the distal zone of the mesh as the elongated cannula moves into a sheathing device. 1. A catheter pump assembly , comprising:an elongate body having a distal end and a proximal end opposite the distal end;a cannula coupled with the distal end of the elongate body, the cannula comprising a mesh structure that includes a non-expandable proximal connection structure, a non-expandable distal connection structure, and a plurality of struts extending at least partway between the proximal connection structure and the distal connection structure, the plurality of struts defining an expandable region of the cannula, wherein the expandable region is configured to expand radially from a first diameter in a stowed configuration to a second diameter in a deployed configuration; andan impeller coupled with the distal end of the elongate body, the impeller configured to expand within at least a portion of the expandable region of the cannula, the impeller further configured to rotate, when expanded, to induce fluid flow within a lumen of the cannula when the expandable region is expanded in the deployed configuration.2. The catheter pump assembly of claim 1 , wherein the portion of the expandable region of the cannula defines an impeller zone claim 1 , and wherein the mesh structure further defines:a first transition zone between the impeller zone and the proximal connection structure; anda second transition zone defined between the impeller zone and the distal connection structure.3. The ...

BLOOD PUMP HOUSING COMPONENT

Blood pump assemblies and methods of manufacturing and operating blood pump assemblies are provided. The blood pump assembly includes a pump and an impeller blade rotatably coupled to the pump. The blood pump assembly also includes a pump housing component sized for passage through a body lumen and coupled to the pump. The pump housing component includes a peripheral wall extending about a rotation axis of the impeller blade. The peripheral wall includes an inner peripheral wall surface and an outer peripheral wall surface. The peripheral wall also includes one or more blood exhaust apertures. Each blood exhaust aperture in the one or more blood exhaust apertures is defined by an inner aperture edge and an outer aperture edge. Each inner aperture edge is chamfered between the inner peripheral wall surface and the outer peripheral wall surface. 133-. (canceled)34. A housing for an intravascular blood pump assembly comprising: an inner surface,', 'an outer surface, and', 'one or more blood exhaust apertures, each blood exhaust aperture being defined by an inner edge and an outer edge;, 'a housing sized for passage through a vascular lumen of a body, the housing including a peripheral wall havingwherein each inner edge is chamfered between the inner surface and the outer surface, andwherein each of the inner and outer edges include rounded corners.35. The housing of claim 34 , wherein each inner edge includes a chamfer of about 45°.36. The housing of claim 34 , wherein each rounded outer edge has a radius of about 40 microns or greater.37. The housing of claim 36 , wherein each rounded outer edge has a radius of about 105 microns or greater.38. The housing of claim 34 , wherein the entirety of each outer edge is rounded.39. The housing of claim 38 , wherein the housing is electropolished.40. The housing of claim 34 , wherein each inner edge includes a first chamfered portion having a first chamfer angle and a second chamfered portion having a second chamfer angle ...

METHOD FOR PUMP START IN A FULLY IMPLANTED LVAD SYSTEM WHEN MULTIPLE POWER SOURCES MAY BE PRESENT

A method of controlling operation of an implantable blood pump includes attempting to restart a stopped implantable blood pump for a predetermined number of attempts with either power from an internal battery of a controller in communication with the implantable blood pump or transcutaneous energy transfer system (TETS) power in communication with the internal battery and the implantable blood pump. Following the predetermined number of attempts, the method includes pausing attempting to restart the implantable blood pump and begin attempting to recharge the internal battery with TETS power.

PUMP TO MOTOR CONNECTION SYSTEM

A connection system for an implantable blood pump including a pump housing having an impeller disposed therein and a motor housing including a motor disposed therein, the motor housing spaced a distance from the pump housing. A flexible outer sheath couples the pump housing to the motor housing, the outer sheath defining a maximum total length between 7 and 10 centimeters. An inner shaft is coaxial with the outer sheath and couples the motor to the impeller. 1. A pump to motor connection system for an implantable blood pump , comprising:a pump housing including an impeller disposed therein;a motor housing including a motor disposed therein, the motor housing being spaced a distance from the pump housing;a flexible outer sheath coupling the pump housing to the motor housing, the outer sheath defining a maximum total length between 7 and 10 centimeters; andan inner shaft coaxial with the outer sheath, the inner shaft coupling the motor to the impeller.2. The system of claim 1 , further comprising a motor shaft extending at least partially within the outer sheath.3. The system of claim 1 , wherein the pump housing defines a total length between 2 and 4 centimeters.4. The system of claim 3 , wherein the motor housing defines a total length between 2 and 4 centimeters.5. The system of claim 1 , wherein the outer sheath includes a pliable member and a cover member surrounding the pliable member.6. The system of claim 5 , wherein the inner shaft is flexible and includes a plurality of steel members defining a coil.7. The system of claim 1 , wherein the outer sheath includes a proximal portion and a distal portion claim 1 , the proximal portion being rigidly coupled to the pump housing and the distal portion being rigidly coupled to the motor housing claim 1 , the pump housing being moveable relative to the motor housing.8. The system of claim 1 , further comprising a bearing and a thrust washer each coupled to the inner shaft.9. The system of claim 8 , wherein the thrust ...

Guidable intravascular blood pump and related methods

An improved intravascular blood pump and related methods involving the broad inventive concept of equipping the intravascular blood pump with guiding features such that the intravascular blood pump can be selectively positioned at a predetermined location within the circulatory system of a patient.

GUIDABLE INTRAVASCULAR BLOOD PUMP AND RELATED METHODS

An improved intravascular blood pump and related methods involving the broad inventive concept of equipping the intravascular blood pump with guiding features such that the intravascular blood pump can be selectively positioned at a predetermined location within the circulatory system of a patient. 1. (canceled)2. An intravascular blood pump system , comprising:a blood pump adapted to be guided to a predetermined location within a circulatory system of a patient by a guide wire and configured to provide left-heart support, the blood pump comprising a rotor having a rotor hub and at least one blade extending outward from the rotor hub;a rotor shroud at least partially disposed about the rotor hub;an elongate catheter extending proximally with respect to the blood pump;a cannula extending from the rotor shroud and comprising an outer cannula surface, the outer cannula surface having a substantially circular cross-section along a portion of its length, wherein a distal portion of the rotor shroud having an outer diameter matching an inner diameter of a proximal portion of the cannula, the proximal portion of the cannula disposed about a distal portion of the rotor shroud, and wherein at least a proximal portion of the rotor shroud has the same outer diameter as the proximal portion of the cannula; andone or more first ports and one or more second ports establishing fluid communication between a cannula lumen and an exterior region of the cannula, wherein at least one first port of the one or more first ports is located in proximity to the rotor and at least one second port of the one or more second ports is spaced apart from and located distal to the at least one first port, wherein the cannula is configured such that when the blood pump is positioned in the patient to provide left-heart support a distal end of the cannula and the at least one second port are positioned inside the patient's heart and a proximal end of the cannula and the at least one first port are ...

GUIDABLE INTRAVASCULAR BLOOD PUMP AND RELATED METHODS

An improved intravascular blood pump and related methods involving the broad inventive concept of equipping the intravascular blood pump with guiding features such that the intravascular blood pump can be selectively positioned at a predetermined location within the circulatory system of a patient. 1. (canceled)2. An intravascular blood pump system , comprising:a blood pump adapted to be guided to a predetermined location within a circulatory system of a patient by a guide wire and configured to provide left-heart support, the blood pump comprising a rotor having a rotor hub and at least one blade extending outward from the rotor hub;a rotor shroud at least partially disposed about the rotor hub;an elongate catheter extending proximally with respect to the blood pump;a cannula extending from the rotor shroud and comprising an outer cannula surface, the outer cannula surface having a substantially circular cross-section along a portion of its length, wherein a distal portion of the rotor shroud having an outer diameter matching an inner diameter of a proximal portion of the cannula, the proximal portion of the cannula disposed about a distal portion of the rotor shroud, and wherein at least a proximal portion of the rotor shroud has the same outer diameter as the proximal portion of the cannula;one or more first ports and one or more second ports establishing fluid communication between a cannula lumen and an exterior region of the cannula, wherein at least one first port of the one or more first ports is located in proximity to the rotor and at least one second port of the one or more second ports is spaced apart from and located distal to the at least one first port, wherein the cannula is configured such that when the blood pump is positioned in the patient to provide left-heart support a distal end of the cannula and the at least one second port are positioned inside the patient's heart and a proximal end of the cannula and the at least one first port are ...

MONITORING OF A CARDIAC ASSIST DEVICE

A control system for a cardiac assist device includes a sensor implantable in the body at the heart or at an implanted pump of the cardiac assist device, the sensor being for detecting motion of the pump within the body and hence being for monitoring movement of the pump, where the control system is arranged to, in use: receive signals from the sensor, the signals providing information on the movement of the pump; and to process the signals to monitor the pump speed and/or to identify pump malfunction and/or cardiac assist treatment complications. 1. A control system for a cardiac assist device , the system including a sensor implantable in the body at the heart or at an implanted pump or graft of the cardiac assist device , the sensor being for detecting motion of the pump within the body and hence being for monitoring movement of the pump , and the control system being arranged to , in use: receive signals from the sensor , the signals providing information on the movement of the pump which may be used to determine information about pump function , vibrations caused by the impeller and blood flow patterns through the pump; and to process the signals to monitor the pump speed and/or to identify pump malfunction and complications to cardiac assist treatment.2. A control system as claimed in claim 1 , wherein a failure of the cardiac assist device is identified when the sensor signal diverges by a given degree from an expected or normal range of values.3. A control system as claimed in claim 1 , wherein processing of the sensor signals includes a raw signal analysis claim 1 , frequency analysis claim 1 , pattern recognition analysis claim 1 , data streaming analysis and/or acoustic analysis.4. A control system as claimed in claim 3 , wherein the signal analysis is used to identify the pump parameters that can indicate pump failure and may be used to identify changes in blood flow patterns thorough the cardiac assist device caused by inflow and outflow problems and ...

BLOOD PUMP HOUSING COMPONENT

Blood pump assemblies and methods of manufacturing and operating blood pump assemblies are provided. The blood pump assembly includes a pump and an impeller blade rotatably coupled to the pump. The blood pump assembly also includes a pump housing component sized for passage through a body lumen and coupled to the pump. The pump housing component includes a peripheral wall extending about a rotation axis of the impeller blade. The peripheral wall includes an inner peripheral wall surface and an outer peripheral wall surface. The peripheral wall also includes one or more blood exhaust apertures. Each blood exhaust aperture in the one or more blood exhaust apertures is defined by an inner aperture edge and an outer aperture edge. Each inner aperture edge is chamfered between the inner peripheral wall surface and the outer peripheral wall surface. 133-. (canceled)34. A blood pump assembly comprising:a pump;an impeller blade rotatably coupled to the pump; anda pump housing component sized for passage through a body lumen and coupled to the pump, the pump housing component including a peripheral wall extending about a rotation axis of the impeller blade, the peripheral wall having:an inner surface,an outer surface, anda plurality of blood exhaust apertures, each blood exhaust aperture being defined by an inner edge and an outer edge; andwherein each blood exhaust aperture is blunted between the inner surface and the outer surface.35. The blood pump assembly of claim 34 , wherein the one or more blood exhaust apertures are circular-shaped.36. The blood pump assembly of claim 34 , wherein the outer edges of the plurality of blood exhaust apertures are rounded.37. The housing of claim 34 , wherein each rounded outer edge has a radius of about 40 microns or greater.38. The housing of claim 36 , wherein each rounded outer edge has a radius of about 105 microns or greater.39. The housing of claim 34 , wherein the entirety of each outer edge is rounded.40. The blood pump ...

PHYSIOLOGICALLY RESPONSIVE VAD

A ventricular assist device incorporating a rotary pump, such as a rotary impeller pump is implantable in fluid communication with a ventricle and an artery to assist blood flow from the ventricle to the artery. The device includes a pump drive circuit supplying power to the pump, one or more sensors for sensing one or more electrophysiological signals such as electrogram signals in and a signal processing circuit connected to the sensors and the pump drive circuit. The signal processing circuit is operative to detect the sensor signals and control power supplied to the pump from the pump drive circuit so that the pump runs in a pulsatile mode, with a varying speed synchronized with the cardiac cycle. When an arrhythmia is detected, the pump drive circuit may also run the pump in an atrial arrhythmia mode or a ventricular arrhythmia mode different from the normal pulsatile mode. 119-. (canceled)20. A ventricular assist device comprising:a rotary pump configured to be implantable in fluid communication with a ventricle and an artery of a subject to assist blood flow from the ventricle to the artery; a pump drive circuit for applying power to the pump;one or more sensors for sensing one or more electrogram signals in a patient;a signal processing circuit in communication with the sensors and the pump drive circuit, the signal processing circuit being operative to receive the electrogram signals from the sensors, and control power supplied to the pump from the pump drive circuit so that in a normal sinus rhythm mode the pump drive circuit varies the power applied to the pump in synchronism with the phases of the cardiac cycle as determined by the electrogram signals, wherein variations of the normal sinus rhythm causes the pump to run with a varying pump speed synchronized with the cardiac cycle.21. A ventricular assist device as claimed in wherein the pump is a rotary impeller pump.22. A ventricular assist device as claimed in claim 20 , wherein the signal processing ...

GUIDABLE INTRAVASCULAR BLOOD PUMP AND RELATED METHODS

An improved intravascular blood pump and related methods involving the broad inventive concept of equipping the intravascular blood pump with guiding features such that the intravascular blood pump can be selectively positioned at a predetermined location within the circulatory system of a patient. 1. (canceled)2. An intravascular blood pump system , comprising:a blood pump comprising a rotor having a rotor hub, at least one blade extending outward from the rotor hub, and a shroud within which the rotor is at least partially rotatably disposed;a catheter coupled to a proximal end of the blood pump;a cannula that is coupled to a distal end of the blood pump;one or more first ports and one or more second ports establishing fluid communication between a lumen of the cannula and an exterior region of the cannula, wherein at least one first port of the one or more first ports is located in proximity to the rotor and at least one second port of the one or more second ports is spaced apart from and located distal to the at least one first port, wherein the cannula is configured such that when the blood pump is positioned in the patient to provide left-heart support a distal end of the cannula and the at least one second port are positioned inside the patient's heart and a proximal end of the cannula and the at least one first port are positioned in the patient's aorta, and the blood pump is configured to draw blood from the patient's heart into the at least one second port through the cannula lumen and out the at least one first port to provide left-heart support while the cannula is positioned across an aortic valve of the patient, wherein a distal portion of the shroud has an outer diameter matching an inner diameter of a proximal portion of the cannula, and the proximal portion of the cannula is disposed about a distal portion of the shroud; anda distal tip, wherein the distal tip is pigtail shaped or J-shaped, and when the blood pump is positioned in the patient to ...

PHYSIOLOGICALLY RESPONSIVE VAD

A ventricular assist device incorporating a rotary pump, such as a rotary impeller pump is implantable in fluid communication with a ventricle and an artery to assist blood flow from the ventricle to the artery. The device includes a pump drive circuit supplying power to the pump, one or more sensors for sensing one or more electrophysiological signals such as electrogram signals in and a signal processing circuit connected to the sensors and the pump drive circuit. The signal processing circuit is operative to detect the sensor signals and control power supplied to the pump from the pump drive circuit so that the pump runs in a pulsatile mode, with a varying speed synchronized with the cardiac cycle. When an arrhythmia is detected, the pump drive circuit may also run the pump in an atrial arrhythmia mode or a ventricular arrhythmia mode different from the normal pulsatile mode. 1. (canceled)2. A ventricular assist device comprising:an implantable rotary pump including a plurality of operating modes each having a speed;a pump drive circuit for applying power to the pump;a plurality of sensors for sensing a plurality of electrogram signals in a subject; anda signal processing circuit in communication with the pump drive circuit and the plurality of sensors, the signal processing circuit configured to detect an arrhythmia in the subject, classify the arrhythmia according to a type of the arrhythmia, and actuate the pump drive circuit to operate the pump in a select operating mode of the plurality of operating modes in accordance with the type of the arrhythmia.3. The ventricular assist device of claim 2 , wherein the type of the arrhythmia is an atrial arrhythmia and the select operating mode includes a pulsed mode claim 2 , the pulsed mode including the speed being synchronized with a cardiac cycle of the subject using an R-wave.4. The ventricular assist device of claim 2 , wherein the type of the arrhythmia is an atrial arrhythmia and the select operating mode ...

VENTRICULAR ASSIST DEVICE

Apparatus and methods are described including a left ventricular assist device. The left ventricular assist device includes an impeller configured to be placed inside a subject's left ventricle, and to pump blood from the subject's left ventricle to the subject's aorta, by rotating. A frame is disposed around the impeller. A tube traverses the subject's aortic valve, such that a proximal portion of the tube is disposed within the subject's aorta and a distal portion of the tube is disposed within the subject's left ventricle. The distal portion of the tube defines one or more blood inlet openings that are configured to allow blood to flow from the subject's left ventricle into the tube. A mesh is configured to prevent inner structures of the left ventricle from passing into the one or more blood inlet openings. Other applications are also described. 1. An apparatus comprising: ["an impeller configured to be placed inside a left ventricle of a subject, and to pump blood from the subject's left ventricle to an aorta of the subject, by rotating;", 'a frame disposed around the impeller;', "a tube configured to traverse an aortic valve of the subject, such that a proximal portion of the tube is disposed within the subject's aorta and a distal portion of the tube is disposed within the subject's left ventricle, the distal portion of the tube defining one or more blood inlet openings that are configured to allow blood to flow from the subject's left ventricle into the tube; and", 'a mesh configured to prevent inner structures of the left ventricle from passing into the one or more blood inlet openings., 'a left ventricular assist device comprising2. The apparatus according to claim 1 , wherein the inner structures of the left ventricle include inner structures of the left ventricle selected from the group consisting of: an interventricular septum claim 1 , chordae tendineae claim 1 , papillary muscles claim 1 , and an apex of the left ventricle.3. The apparatus according ...

VENTRICULAR ASSIST DEVICE

Apparatus and methods are described including a left ventricular assist device. The left ventricular assist device includes an impeller configured to be placed inside a subject's left ventricle, and to pump blood from the subject's left ventricle to the subject's aorta, by rotating. A frame is disposed around the impeller. A tube traverses the subject's aortic valve, such that a proximal portion of the tube is disposed within the subject's aorta and a distal portion of the tube is disposed within the subject's left ventricle. The distal portion of the tube defines one or more blood inlet openings that are configured to allow blood to flow from the subject's left ventricle into the tube. A braided element is configured to prevent inner structures of the left ventricle from passing into the one or more blood inlet openings. Other applications are also described. 1. An apparatus comprising: ["an impeller configured to be placed inside a left ventricle of a subject, and to pump blood from the subject's left ventricle to an aorta of the subject, by rotating;", 'a frame disposed around the impeller;', "a tube configured to traverse an aortic valve of the subject, such that a proximal portion of the tube is disposed within the subject's aorta and a distal portion of the tube is disposed within the subject's left ventricle, the distal portion of the tube defining one or more blood inlet openings that are configured to allow blood to flow from the subject's left ventricle into the tube; and", 'a braided element configured to prevent inner structures of the left ventricle from passing into the one or more blood inlet openings., 'a left ventricular assist device comprising2. The apparatus according to claim 1 , wherein the braided element comprises a shape-memory material.3. The apparatus according to claim 1 , wherein the braided element is not covered.4. The apparatus according to claim 1 , wherein a distal tip of the braided element is configured to invert.5. The apparatus ...

GUIDABLE INTRAVASCULAR BLOOD PUMP AND RELATED METHODS

An improved intravascular blood pump and related methods involving the broad inventive concept of equipping the intravascular blood pump with guiding features such that the intravascular blood pump can be selectively positioned at a predetermined location within the circulatory system of a patient. 123-. (canceled)24. A method for perfusing a patient with an intravascular blood pump system , the intravascular blood pump system comprising (i) an intravascular blood pump comprising a rotor having a rotor hub tapering in the distal direction , at least one blade extending radially outward from the rotor hub , the hub having a distal end extending distally beyond the most distal portion of the blade and a shroud within which the rotor is rotatably disposed; (ii) a cannula extending from the shroud and comprising an outer cannula surface , the outer cannula surface having a substantially circular cross-section along a portion of its length; (iii) a first lumen in fluid communication with the intravascular blood pump and operatively arranged to deliver purge fluid to the intravascular blood pump; and (iv) a guide mechanism configured as a second lumen having a proximal end and a distal end , the guide mechanism adapted to guide a distal portion of said intravascular blood pump system to a predetermined location within the circulatory system of a patient , wherein an axis coaxial with and extending through a portion of said guide mechanism extends through a region delimited by the outer cannula surface , and wherein the guide mechanism is configured to allow for a guide wire to slideably advance therealong , the method comprising the steps of:progressing a guide wire to a predetermined location in the circulatory system of the patient; andadvancing the blood pump system along the guide wire to the predetermined location.25. A method for perfusion a patent with an intravascular blood pump system , the intravascular blood pump system comprising (i) an intravascular blood ...

Motor assembly with heat exchanger for catheter pump

A catheter pump is disclosed. The catheter pump can include an impeller and a catheter body having a lumen therethrough. The catheter pump can also include a drive shaft disposed inside the catheter body. A motor assembly can include a chamber. The motor assembly can include a rotor disposed in the at least a portion of the chamber, the rotor mechanically coupled with a proximal portion of the drive shaft such that rotation of the rotor causes the drive shaft to rotate. The motor assembly can also comprise a stator assembly disposed about the rotor. The motor assembly can also include a heat exchanger disposed about the stator assembly, the heat exchanger may be configured to direct heat radially outward away from the stator assembly, the rotor, and the chamber.

VENTRICULAR ASSIST DEVICE

Apparatus and methods are described including a left ventricular assist device that includes an impeller configured to be placed inside a left ventricle of a subject and to pump blood from the left ventricle to an aorta of the subject, by rotating. A frame is disposed around the impeller. A tube is configured to traverse an aortic valve of the subject, such that a proximal portion of the tube is disposed within the subject's aorta and a distal portion of the tube is disposed within the subject's left ventricle. The distal portion of the tube extends to a distal end of the frame and defines one or more lateral blood inlet openings that are configured to allow blood to flow from the subject's left ventricle into the tube. Other applications are also described. 1. An apparatus comprising: an impeller configured to be placed inside a left ventricle of a subject and to pump blood from the left ventricle to an aorta of the subject, by rotating;', 'a frame disposed around the impeller; and', "a tube configured to traverse an aortic valve of the subject, such that a proximal portion of the tube is disposed within the subject's aorta and a distal portion of the tube is disposed within the subject's left ventricle,", "the distal portion of the tube extending to a distal end of the frame and defining one or more lateral blood inlet openings that are configured to allow blood to flow from the subject's left ventricle into the tube."], 'a left ventricular assist device comprising2. The apparatus according to claim 1 , wherein the frame is shaped such that claim 1 , in a non-radially constrained configuration of the frame claim 1 , the frame defines a proximal conical portion claim 1 , a central cylindrical portion claim 1 , and a distal conical portion claim 1 , wherein the distal portion of the tube extends distally over the distal conical portion of the frame claim 1 , and wherein at least some of the one or more blood inlet openings are at least partially disposed over the ...

CATHETER PUMP WITH OFF-SET MOTOR POSITION

A catheter pump assembly is provided that includes an elongate body, an elongate flexible shaft disposed in the elongate body, and an impeller coupled with the distal end of the elongate flexible shaft. The drive system includes a drive component, a motor and a tension member. The tension member is coupled with the motor and the drive component and to cause the drive component to rotate, and thereby to cause the impeller to rotate. 1. A percutaneous heart pump comprising:a drive shaft having a proximal end and a distal end;an impeller coupled with the distal end of the drive shaft;an armature assembly comprising a plurality of windings; anda rotor coupled to the proximal end of the drive shaft and positioned within the armature assembly, the plurality of windings in the armature assembly energizable to rotate the rotor.2. The percutaneous heart pump of claim 1 , further comprising a control system coupled to the armature assembly via a lead claim 1 , the control system including one or more processors and configured to supply the plurality of windings with current to energize the plurality of windings.3. The percutaneous heart pump of claim 1 , further comprising a sensor configured to assist in energizing the plurality of windings.4. The percutaneous heart pump of claim 3 , wherein the sensor is disposed in a magnetic field generated by the armature assembly.5. The percutaneous heart pump of claim 1 , further comprising a housing claim 1 , wherein the armature assembly and the rotor are positioned within the housing.6. The percutaneous heart pump of claim 5 , wherein the housing includes a first recess configured to receive a first portion of the armature assembly claim 5 , and a cap configured to receive a second portion of the armature assembly.7. The percutaneous heart pump of claim 1 , wherein a space is provided between the armature assembly and the rotor claim 1 , the space being in fluid communication with a lumen that can be fluidly coupled with a source of ...

Circulatory assist pump

A minimally invasive circulatory support platform that utilizes an aortic stent pump or pumps. The platform uses a low profile catheter-based techniques and provides temporary and chronic circulatory support depending on the needs of the patient. Further described is a wirelessly powered circulatory assist pump for providing chronic circulatory support for heart failure patients. The platform and system are relatively easy to place, have higher flow rates than existing systems, and provide improvements in the patient's renal function.

Generating Artificial Pulse

Mechanical circulatory assist systems and related methods produce a pulsatile blood flow in synchronization with heart activity. A mechanical circulatory assist system includes a continuous-flow pump and a controller. The continuous-flow pump is implantable in fluid communication with a left ventricle of a heart of a patient and an aorta of the patient to assist blood flow from the left ventricle to the aorta. The controller includes a sensor that generates a signal indicative of an activity of the heart. The controller is operatively connected to the continuous-flow pump and configured to operate the continuous-flow pump in an artificial pulse mode in synchronization with the activity of the heart. 1. A mechanical circulatory assist system comprising:a continuous-flow pump implantable in fluid communication with a left ventricle of a heart of a patient and an aorta of the patient to assist blood flow from the left ventricle to the aorta; anda controller comprising a sensor that generates a signal indicative of an activity of the heart, wherein the controller is operatively connected to the continuous-flow pump and configured to operate the continuous-flow pump in an artificial pulse mode in synchronization with the activity of the heart.2. The mechanical circulatory assist system of claim 1 , wherein the signal is indicative of a power consumption of the continuous-flow pump.3. The mechanical circulatory assist system of claim 2 , wherein the controller processes the signal to determine when the left ventricle contracts.4. The mechanical circulatory assist system of claim 3 , wherein the artificial pulse mode comprises:(a) operating the continuous-flow pump at a first speed for a first speed duration;(b) reducing the speed of the continuous-flow pump from the first speed to a second speed;(c) operating the continuous-flow pump at the second speed for a second speed duration;(d) reducing the speed of the continuous-flow pump from the second speed to a third speed;(e ...

Physiologically responsive vad

A ventricular assist device incorporating a rotary pump, such as a rotary impeller pump is implantable in fluid communication with a ventricle and an artery to assist blood flow from the ventricle to the artery. The device includes a pump drive circuit supplying power to the pump, one or more sensors for sensing one or more electrophysiological signals such as electrogram signals in and a signal processing circuit connected to the sensors and the pump drive circuit. The signal processing circuit is operative to detect the sensor signals and control power supplied to the pump from the pump drive circuit so that the pump runs in a pulsatile mode, with a varying speed synchronized with the cardiac cycle. When an arrhythmia is detected, the pump drive circuit may also run the pump in an atrial arrhythmia mode or a ventricular arrhythmia mode different from the normal pulsatile mode.

PERCUTANEOUS HEART PUMP

Disclosed herein are heart pumps that can include a catheter body and an impeller coupled with a distal end of the catheter body. The impeller can include a tip that is resealable or that includes a resealable member. The heart pump can also include a diffuser disposed between the distal end of the catheter body and the impeller, wherein the diffuser includes a flow directing surface. 123.-. (canceled)24. A heart pump comprisingan impeller housing comprising one or more outlets, the impeller housing having a longitudinal axis;an impeller disposed with the impeller housing, the impeller comprising a blade and being configured to convey blood through the one or more outlets; andan adjustment device at a proximal end portion of the heart pump, the adjustment device configured to be disposed outside the patient,wherein the heart pump is configured to provide relative motion between the impeller housing and the impeller parallel to the longitudinal axis when the adjustment device is activated.25. The heart pump of claim 24 , wherein claim 24 , at a first axial position claim 24 , the one or more outlets is disposed proximal a proximal-most end of the blade.26. The heart pump of claim 25 , wherein claim 25 , at a second axial position claim 25 , the one or more outlets is disposed adjacent the blade.27. The heart pump of claim 24 , further comprising a rod connected to the impeller housing claim 24 , the rod configured to cause the impeller housing to translate parallel to the longitudinal axis relative to the impeller.28. The heart pump of claim 24 , wherein the adjustment device comprises a nut mechanically connected to the impeller by way of a pin claim 24 , wherein rotation of the nut causes the pin and the impeller to translate along the longitudinal axis.29. The heart pump of claim 24 , further comprising a catheter body having a distal end portion connected with a proximal end portion of the impeller housing.30. The heart pump of claim 24 , further comprising a tip ...

PHYSIOLOGICALLY RESPONSIVE VAD

A ventricular assist device incorporating a rotary pump, such as a rotary impeller pump is implantable in fluid communication with a ventricle and an artery to assist blood flow from the ventricle to the artery. The device includes a pump drive circuit supplying power to the pump, one or more sensors for sensing one or more electrophysiological signals such as electrogram signals in and a signal processing circuit connected to the sensors and the pump drive circuit. The signal processing circuit is operative to detect the sensor signals and control power supplied to the pump from the pump drive circuit so that the pump runs in a pulsatile mode, with a varying speed synchronized with the cardiac cycle so that it operates in copulsation or counterpulsation with the cycle. The cardiac cycle for purposes of synchronization can also be based on an average of two or more cardiac cycles. 1. A ventricular assist device comprising:a rotary pump configured to be implantable in fluid communication with a ventricle and an artery of a subject to assist blood flow from the ventricle to the artery;a pump drive circuit for applying power to the pump;one or more sensors for sensing one or more electrogram signals in a patient; anda signal processing circuit in communication with the sensors and the pump drive circuit, the signal processing circuit being operative to receive the electrogram signals from the sensors, and control power supplied to the pump from the pump drive circuit so that in a normal pulsatile mode the pump drive circuit varies the power applied to the pump in synchronism with the cardiac cycle as determined by the electrogram signals, and such variation causes the pump to run with a varying speed synchronized with the cardiac cycle of the subject so that the pump speeds up and slows down during each cardiac cycle,wherein the varying speed is synchronized with the cardiac cycle so that the pump operates at a maximum speed during ventricular diastole.2. The ...

Blood pump

A centrifugal blood pump for circulating blood is provided, wherein an impeller makes no contact at all with a housing and a rotating shaft and moves in a rotating manner with the impeller in a stably levitating state. Also provided is a blood pump in which the impeller rotates at high speed even when the blood pump is reduced in scale. The blood pump contains a magnet of enhanced magnetic force at the inside of a housing and at an outer peripheral surface of an impeller and providing a fixed-interval spacing on the periphery of a bearing section makes it possible to ensure a state where no contact at all is made between the housing, a shaft, and the impeller, and makes it possible to cause the impeller to rotate stably over a long period of time.

PHYSIOLOGICALLY RESPONSIVE VAD FOR CARDIAC EVENTS

A ventricular assist system including an implantable rotary pump, a pump drive circuit for supplying power to the pump, and a signal processing circuit receiving one or more electrophysiological signals and one or more physiological signals of the subject. The signal processing circuit is operable to receive inputs from the one or more electrophysiological sensors and the physiological sensor, and determine the presence or absence of a non-normal sinus cardiac rhythm condition based on the input from the electrophysiological sensors. In the presence of a non-normal sinus rhythm, the circuit operates the pump in a modified mode of operation. In the absence of a non-normal sinus rhythm, the circuit operates the pump in a normal mode of operation. In either case, the circuit controls the power to the pump and/or speed of the pump based on the input from the physiological sensor and the mode of operation. 1. A signal processing circuit for controlling operation of a pump drive operatively coupled to an implantable rotary pump , the signal processing circuit configured to:receive inputs from one or more electrophysiological sensors and a physiological sensor;determine at least one from the group consisting of the presence and absence of a non-normal sinus cardiac rhythm condition of a patient based on the input from the one or more electrophysiological sensors; and instruct the pump drive to operate in a modified mode of operation; and', 'control at least one from the group consisting power to the pump drive and speed of the pump based on the input from the physiological sensor and the modified mode of operation; and, 'when a non-normal sinus rhythm is determined to be present instruct the pump drive to operate in a normal mode of operation; and', 'control at least one from the group consisting power to the pump drive and speed of the pump based on the input from the physiological sensor., 'when a non-normal sinus rhythm is determined to be absent2. The circuit of claim ...

BLOOD PUMP

A blood pump having an axially tubular inlet, a tangential chamber adjoining the axial inlet and having a substantially radial outlet, with an axial guide body connected to the outlet and/or to the tangential chamber, an impeller supported on the guide body and having an inner surface facing the guide body and an outer surface as well as blading arranged on the outer surface. At least one part region of the guide body projects from the tangential chamber into the inlet, wherein at least one section of the stator transmitting a force onto the rotor is arranged in the part region. The impeller is supported by a hydrodynamic radial bearing in the radial direction. 2. A blood pump in accordance with claim 1 , wherein the impeller is supported in the radial direction only by a hydrodynamic radial bearing preferably formed between the inner surface of the impeller and the guide body outer surface.3. A blood pump in accordance with claim 1 , wherein the stator is arranged in a hollow space of the guide body.4. A blood pump in accordance with claim 1 , wherein the guide body is connected to a wall of the tangential chamber.5. A blood pump in accordance with claim 1 , wherein the stator includes windings and preferably a ferrite core.6. A blood pump in accordance with claim 1 , wherein the impeller is made in cylinder jacket form in the part section claim 1 , preferably completely.736. A blood pump in accordance with claim 1 , wherein the impeller includes a hollow space and the rotor is arranged in the hollow space ().8. A blood pump in accordance with claim 1 , wherein the rotor preferably includes at least one alternatingly magnetized segmented permanent magnet ring.9. A blood pump in accordance with claim 8 , wherein the permanent magnet ring is present as a one-piece ring magnet or is composed of respective individually magnetized part segments.10. A blood pump in accordance with claim 1 , wherein the impeller is arranged such that the blading is arranged both in the ...

STABILIZING DRIVE FOR CONTACTLESS ROTARY BLOOD PUMP IMPELLER

A rotary blood pump includes a casing defining a pumping chamber. The pumping chamber has a blood inlet and a tangential blood outlet. One or more motor stators are provided outside of the pumping chamber. A rotatable impeller is within the pumping chamber and is adapted to cause blood entering the pumping chamber to move to the blood outlet. The impeller has one or more magnetic regions. The impeller is radially constrained in rotation by magnetic coupling to one or more motor stators and is axially constrained in rotation by one or more hydrodynamic thrust bearing surfaces on the impeller. 120.-. (canceled)21. A rotary blood pump comprising:a housing defining a pump chamber;an impeller rotatable on a rotation axis within said pump chamber, said impeller having a hollow interior cavity defined by a cylindrical perimeter wall surface; anda plurality of spaced apart polyhedron bodies within said interior cavity each extending radially inwardly from said perimeter wall surface and having a surface area facing the rotation axis of said impeller, said polyhedron bodies being positioned to enable balanced rotation of said impeller, selected polyhedron bodies comprising one or more openings formed in predetermined surface areas thereof and configured substantially to equalize the weight thereof.221. The rotary blood pump of claim comprising at least two of said polyhedron bodies spaced approximately 180° apart about the rotation axis of said impeller.231. The rotary blood pump of claim comprising four of said polyhedron bodies spaced approximately 90° apart about the rotation axis of said impeller.241. The rotary blood pump of claim in which each polyhedron surface area facing the rotation axis of the impeller is curved , said curved surfaces areas having equal radii of curvature such that collectively said curved surface areas define a common circular arc the center of which is the rotation axis of the impeller.254. The rotary blood pump of claim comprising a plurality ...

GUIDABLE INTRAVASCULAR BLOOD PUMP AND RELATED METHODS

An improved intravascular blood pump and related methods involving the broad inventive concept of equipping the intravascular blood pump with guiding features such that the intravascular blood pump can be selectively positioned at a predetermined location within the circulatory system of a patient. 1. (canceled)2. An intravascular blood pump system comprising:a pump assembly;a conduit assembly that is selectively engageable with the pump assembly; anda perfusion assembly that is selectively coupleable with the conduit assembly, wherein when the perfusion assembly is coupled to the conduit assembly the perfusion assembly is operable to perfuse a patient with blood flowing through the conduit assembly.3. The intravascular blood pump system of claim 2 , wherein the perfusion assembly includes a seal disposed to prevent migration of blood out of a proximal end of the perfusion assembly.4. The intravascular blood pump system of claim 3 , wherein the seal is a Touehy-Borst hemostasis seal.5. The intravascular blood pump system of claim 4 , wherein a drive cable that is connected to a pump of the pump assembly extends through the conduit assembly and exits through the Touehy-Borst hemostasis seal.6. The intravascular blood pump system of claim 5 , further comprising:a motor assembly operably connected to the drive cable so as to drive the pump of the pump assembly.7. The intravascular blood pump system of claim 2 , wherein the perfusion assembly is selectively coupleable with the conduit assembly via a male quick-connect coupling that selectively couples with a female quick-connect coupling.8. The intravascular blood pump system of claim 7 , wherein the perfusion assembly includes a hemostasis valve coupled to the female quick-connect coupling.9. The intravascular blood pump system of claim 2 , wherein the perfusion assembly includes a hemostasis valve disposed at a location where the perfusion assembly is selectively coupleable with the conduit assembly.10. The ...

ROTARY PUMP WITH THRUST BEARINGS

A rotary blood pump includes a casing defining a pumping chamber. The pumping chamber has a blood inlet and a tangential blood outlet. One or more motor stators are provided outside of the pumping chamber. A rotatable impeller is within the pumping chamber and is adapted to cause blood entering the pumping chamber to move to the blood outlet. The impeller has one or more magnetic regions. The impeller is radially constrained in rotation by magnetic coupling to one or more motor stators and is axially constrained in rotation by one or more hydrodynamic thrust bearing surfaces on the impeller. 1. A rotary blood pump comprising:A housing defining a pumping chamber with upper and lower interior surfaces and having a blood inlet and a tangential blood outlet;A rotatable impeller within said pumping chamber and adapted to increase blood pressure within said pumping chamber to cause blood to move to said blood outlet, said impeller having at least one raised surface area adjacent said upper interior surface of said pumping chamber;a first tapered region of said raised surface area having a leading portion and a trailing portion such that a gap between said first tapered region and said upper interior surface of said housing decreases from said leading portion to said trailing portion to create a hydrodynamic thrust load acting to bias said impeller axially away from said upper interior surface of said housing when said impeller is rotating, each of said first tapered regions having a shroud extending from said leading portion to said trailing portion along each of its inner and outer boundaries.218-. (canceled) This application claims the benefit of U.S. Provisional Applications Nos. 60/758,793, filed Jan. 13, 2006; 60/758,892, filed Jan. 13, 2006; 60/758,795, filed Jan. 13, 2006; and 60/758,794, filed Jan. 13, 2006, the entire contents of which are hereby incorporated by reference.The present invention relates to rotary pumps and, more specifically, to centrifugal rotary ...

PHYSIOLOGICALLY RESPONSIVE BLOOD PUMP FOR ISCHEMIA DETECTION AND TREATMENT

A ventricular assist device incorporating a rotary pump configured to be in fluid communication with a heart and systemic circulation of a subject to assist blood flow from the heart to the systemic circulation. The device includes a pump drive circuit for applying power to the pump, one or more sensors for sensing one or more electrogram signals (such as subcutaneous pre-cordial electrode signals) in the patient, and a signal processing circuit to determine the presence or absence of a reduction in cardiac blood flow, ischemic condition or myocardial infarction condition based on subcutaneous pre-cordial electrode signals, to control power supplied to the pump from the pump drive circuit, and to operate the pump in either a normal sinus rhythm mode in the absence of an ischemic condition or myocardial infarction condition, or a modified mode of operation in the presence of an ischemic condition or myocardial infarction condition. 1. A ventricular assist device comprising:a rotary pump configured to be implantable in fluid communication with a heart and systemic circulation of a subject to assist blood flow from the heart to the systemic circulation;a pump drive circuit for applying power to the pump;a pump drive circuit to control the speed of the pump;one or more sensors for sensing one or more electrogram signals in a patient; anda signal processing circuit in communication with the sensors and the pump drive circuit, the signal processing circuit being operative to receive the subcutaneous ECG signals, wherein the signal processing circuit is operative to determine the presence or absence of a reduction in cardiac blood flow or an ischemic condition or myocardial infarction condition based on subcutaneous pre-cordial electrode signals, and to control power supplied to the pump from the pump drive circuit so as to control the speed of the pump and operate the pump in a normal sinus rhythm mode in the absence of an ischemic condition or myocardial infarction ...

METHODS TO INCREASE THE OVERALL DIAMETER OF DONATING VEINS AND ARTERIES

A system and method for increasing the speed of blood and the wall shear stress in a peripheral artery or peripheral vein to a sufficient level and for a sufficient period of time to result in a persistent increase in the overall diameter and lumen diameter of the donating artery or donating vein is provided. The method includes systems and methods to effect the movement of blood at the desired rate and in the desired direction. The movement of blood is monitored and adjusted, as necessary, to maintain the desired blood speed and wall shear stress in the peripheral artery or vein in order to optimize the rate and extent of persistent diameter increase of the peripheral artery or peripheral vein. 1. A method for creating an arteriovenous fistula or an arteriovenous graft in a human patient , the method comprising:fluidly connecting one end of a pump-conduit assembly to the donating vein or location; pumping venous blood from the donating vein or location into the accepting vein, wherein: the pumping of blood results in a mean wall shear stress in the accepting vein of greater than or equal to 0.76 Pa;', 'the pumping of blood results in a mean pulse pressure in the accepting vein of less than 40 mmHg; and', 'the pumping of blood results in an increase in the lumen diameter and overall diameter of the accepting vein which persists after pumping has ceased; and,, 'fluidly connecting another end of the pump-conduit assembly to an accepting vein; and,'}creating the arteriovenous fistula or arteriovenous graft in the patient using at least a portion of the accepting vein with the persistently-increased lumen diameter and overall diameter.2. The method of claim 1 , wherein the pump-conduit assembly pumps deoxygenated blood.3. The method of claim 1 , wherein the pump-conduit assembly pumps blood at a rate between 50 ml/min and 2500 ml/min claim 1 , 50 ml/min and 1000 ml/min claim 1 , 100 ml/min and 1000 ml/min claim 1 , 100 ml/min and 1500 ml/min claim 1 , 50 ml/min and 2500 ...

METHOD FOR OPERATING A PUMP DEVICE AND A PUMP DEVICE

A method may be provided for the operation of a pump device, which comprises at least one pump as well as a suction element which is connected to the at least one pump and which has a suction opening positioned in a cavity of a body of a patient that sucks a fluid by way of producing a reduced pressure in the suction element, wherein an acceleration is measured and monitored during the operation of the pump device, wherein the reduced pressure in the suction element is reduced at least for a limited reaction time period, given the occurrence of an acceleration variable which lies above a fixed threshold valve. A correspondingly configured pump device may be provided. 1. A method comprising:sucking a fluid out of a cavity with a pump by producing a reduced pressure in an inlet connected to the pump;monitoring an temporal derivative of a rotation rate during the sucking; andreducing the reduced pressure in the inlet in response to the temporal derivative of a rotation rate exceeding a threshold value.2. The method of further comprising reducing a pump power of the pump for a reaction time period.3. The method of claim 2 , wherein the pump is a rotation pump claim 2 , the method further comprising reducing a speed of the rotation pump for a reaction time period.4. The method of further comprising closing claim 1 , at least partly claim 1 , a valve in the inlet at least for a reaction time period.5. The method of further comprising reducing at least one of: a suction pressure of the inlet claim 1 , a pump power of the pump claim 1 , or a closure of a valve in the inlet more rapidly at the beginning of a reaction time period than later in the reaction time period claim 1 , and increasing at least one of: a suction pressure of the inlet claim 1 , a pump power of the pump claim 1 , or an opening of a valve of the inlet towards the end of the reaction time period.6. The method of claim 1 , wherein the variable derived from the acceleration comprises at least one of: a ...

METHOD FOR CONVEYING A MEDIUM WITH A PUMP AND PUMP COMPRISING A ROTOR, A HOUSING AND A DRIVE

A method for conveying blood or priming liquid as a medium using a blood pump, measures gas in the medium in a feed line to the pump, in or on the pump, and the pump power is increased only for a short time as a function of the measured gas. A blood pump, in particular a centrifugal pump or diagonal pump, includes a rotor, a housing and a drive, the pump including a gas detector which acts upon the drive when gas is detected. 11255. Method of conveying blood or priming fluid as medium with a blood pump () , in which gas () is measured in the medium () in an inlet line to the pump , in or on the pump and the pump output is increased only briefly as a function of the measured gas.21. Method according to wherein the pump () is a centrifugal pump or a diagonal pump.3. Method according to claim 1 , wherein the pump output is increased for a period of less than 5 seconds and preferably from 0 to 2 seconds claim 1 , more particularly from 0.1 to 2 seconds.4. Method according to claim 1 , wherein the pump output is increased by up to 100% within a period of less than 5 seconds and preferably 0 to 2 seconds claim 1 , more particularly from 0.1 to 2 seconds5. Method according to claim 1 , wherein the pump output is reduced before the increase.6. Method according to claim 1 , wherein before the increase the pump output is reduced by up to 100% within a period of less than 5 seconds and preferably 0 to 2 seconds claim 1 , more particularly from 0.1 to 2 seconds.7. Method according to claim 1 , wherein the pump output is increased on detection of gas entry.8. Method according to claim 1 , wherein the pump output is increased after the detection of a predetermined gas quantity.951631. Method according to claim 1 , wherein the pump output is increased after a period of time corresponding to the time required by the medium () to travel from the detector () to the rotor () of the pump ().10. Method according to claim 1 , wherein the pump output is increased on expiry of a ...

Electrocardiography Triggered Piston Pump

A positive displacement pump that triggers with the beating of a mammalian heart, through the monitoring of an ECG signal is disclosed. A programmable delay from the detection of the forthcoming contraction of the heart enables the pump to syncopate the ejection of the fluid with the events occurring in the cardiovascular system. This delayed ejection could be used to overlay the ejected fluid from the pump with a pressure wave in the artery of systemic circulation through a catheter connection between the pump and a physiological model (e.g., cow, dog, human). The outcome of this use could be to raise the pulse pressure in the system to take advantage of physiological pathways that respond to this transient change in blood pressure. The novelty of this system stems from the adaptable control architecture designed to augment the pulsatile characteristics of the cardiovascular system. This inventive concept could be expanded to encompass the augmentation (dampen or enhance) of pulsatile characteristics in any oscillating flow system. 1. A biocompatible positive displacement pump that triggers with the beating of a mammalian heart comprising:(a) a frame system; (i) a pump head system;', '(ii) a pump casing component; and', '(iii) a drive train system, comprising a motor drive power supply;, '(b) a pump unit, comprising(c) an electronics system, comprising an electronics power supply.2. The pump of claim 1 , wherein the pump casing component comprising:(a) a feed line;(b) a return line; (i) a barb adapter;', '(ii) a tubing;', '(ii) a polymer tubing;', '(iii) a high flow check valve; and', '(iv) a three-way barb connection;, 'wherein the feed line and return line each comprisewherein the barb adapter connects the flexible tubing to an acrylic pump casing, the polymer tubing, the high flow check valve, and the three-way barb connection.3. The pump of claim 1 , wherein the pump casing component comprising:(a) a feed line;(b) a return line; (i) a barb adapter;', '(ii) a ...

GENERATING ARTIFICIAL PULSE

In order to produce a pulsatile blood flow pattern that includes time periods of relatively high blood flow rates and time periods of relatively low blood flow rates, the operating speed of a blood pump can be selectively controlled to produce an operating speed pattern that includes time periods of relatively high rotation speeds and periods of relatively low rotation speeds. For example, the blood pump is rotated at a first speed for a first period of time. The speed of the blood pump is then decreased from the first speed to a second speed and is operated at the second speed for a second amount of time. The speed of the blood pump is then decreased to a third speed for a third amount of time. If desired, the operating speed pattern can be repeated to continue the pulsatile blood flow pattern. 115-. (canceled)16. A method for pumping blood , comprising:operating a blood pump at a first speed for a first period of time;reducing a speed of the blood pump from the first speed to a second speed;returning the speed of the blood pump from the second speed to the first speed by overshooting the first speed to a greater speed before returning to the first speed.17. The method of claim 16 , wherein one or more of reducing the speed of the blood pump from the first speed to the second speed and returning the speed of the blood pump from the second speed to the first speed includes a step-wise change in speed.18. The method of claim 16 , wherein the first period of time is longer than a sum of a second period of time in which the speed of the blood pump is reduced to the second speed and a duration of the overshoot of the first speed when returning the speed of the blood pump from the second speed to the first speed.19. The method of claim 16 , wherein a second period of time in which the speed of the blood pump is reduced to the second speed is longer than a duration of the overshoot of the first speed when returning the speed of the blood pump from the second speed to the ...

VENTRICULAR ASSIST DEVICE AND METHOD

An intracorporeal device is provided for supporting heart function of a patient. The intracorporeal device is configured to be secured across at least two anatomical walls of the heart. The intracorporeal device is configured to be secured to one or more anatomical walls by a connector. The connector is arranged to be positioned across one or more anatomical walls. 1. An intracorporeal device for supporting heart function of a patient , wherein said device is configured to be secured across at least two anatomical walls of the heart.2. The intracorporeal device according to claim 1 , wherein at least one anatomical wall is an intra-cardiac wall and a least one anatomical wall is an extra-cardiac wall.3. The intracorporeal device according to claim 1 , wherein the intracorporeal device is configured to be secured to one or more anatomical walls by means of:a connector, said connector arranged to be positioned across one or more anatomical walls; and, optionally,a fixing means, said fixing means being integrally formed or coupled to the intracorporeal device.4. The intracorporeal device according to claim 3 , wherein the fixing means comprises a plurality of arms extending from the intracorporeal device.5. The intracorporeal device according to claim 1 , wherein the intracorporeal device comprises one or more recesses adapted and configured to receive one or more anatomical walls.6. The intracorporeal device according to claim 1 , comprising a proximal portion positioned in a first anatomical compartment claim 1 , an intermediate portion positioned in a second anatomical compartment claim 1 , a distal portion positioned in a third anatomical compartment.7. The intracorporeal device according to claim 6 , comprising a motor located in the proximal portion claim 6 , one or more fluid inlet ports in the intermediate portion claim 6 , a pump in the intermediate portion claim 6 , and one or more fluid outlet ports in the distal portion.8. The intracorporeal device ...

CATHETER DEVICE

The catheter device comprises a motor at the proximal end of the catheter device and a drive shaft, extending from the proximal end section to the distal end section of the catheter device, for driving a rotating element located at the distal end of the catheter device. The catheter device also comprises a hose-like catheter body which encompasses the drive shaft and extends from the proximal end section to the distal end section. At the proximal end of the catheter device, the drive shaft is connected to a motor by a clutch. The clutch is a magnetic clutch with a proximal and a distal magnet unit. The proximal magnet unit is connected to the motor and the distal magnet unit to the drive shaft. The distal magnet unit is mounted fluid-tight in a clutch housing. The proximal end of the catheter body makes a fluid-tight connection with the clutch housing. 110.-. (canceled)11. A catheter device comprising:a drive shaft;a rotor, connected to the drive shaft;a pump head comprising an expandable and collapsible pump housing;a body cap, wherein the body cap has a proximal end and a distal end, and comprises an atraumatic ball at said distal end of the body cap; anda body element that forms a connection between the body cap and the pump housing.12. The catheter device of claim 11 , wherein the body element is co-axial with the drive shaft.13. The catheter device of claim 12 , wherein the body cap comprises:a first bore, proximal to the ball, the first bore extending perpendicularly to a flow direction of the catheter device, anda second bore providing a communicating passage from the first bore to the proximal end of the body cap.14. The catheter device of claim 12 , comprising a connection bush having proximal and distal areas claim 12 , the connection bush being positioned at a proximal end of the body element and being aligned coaxially with the body element.15. The catheter device of claim 14 , wherein the proximal area of the distal connection bush is connected to the ...

Axial-flow blood pump

The invention relates to an axial flow blood pump device comprising an integrated electromagnetic drive with a stationary stator assembly and a rotatable impeller assembly, wherein the stationary stator assembly at least comprises stator windings ( 3 ) and a bearing system ( 4 ) supporting the rotatable impeller assembly, the impeller assembly comprising at least one blade ( 9 ) and permanent magnets ( 10 ) interacting with the stator windings ( 3 ), wherein the stationary stator assembly comprises supporting elements ( 8 ) for mounting, in particular coaxially mounting the device in the interior of an anchoring system ( 7 ) being implantable into a vessel. The invention furthermore relates to a system comprising a device according to any of the preceding claims and a anchoring system ( 7 ), in particular a stent ( 7 ) surrounding the device, wherein the anchoring system ( 7 ) and the device, in particular the at least one blade ( 9 ) and the supporting members ( 8 ) of the device are in a collapsed/compressed/folded state for implanting the system into a vessel, the system being expandable/unfoldable after implantation.

WIRELESS DIAGNOSTIC SYSTEM FOR INDIRECT FLOW MEASUREMENT IN ARTIFICIAL HEART PUMPS

Systems, apparatuses, and methods are disclosed for optimizing management of one or more implanted artificial heart pumps. An example method includes wirelessly retrieving, via one or more portable diagnostic devices, data regarding the one or more implanted artificial heart pumps. The example method further includes analyzing, by a server device, performance characteristics of the one or more implanted artificial heart pumps based on the retrieved data. The example method further includes causing rendering of the performance characteristics. Corresponding apparatuses and computer program products are contemplated. 1. A method for optimizing management of one or more implanted artificial heart pumps that indirectly measure flow , the method comprising:wirelessly retrieving, via one or more portable diagnostic devices, data regarding the one or more implanted artificial heart pumps;analyzing, by a server device, performance characteristics of the one or more implanted artificial heart pumps based on the retrieved data; andcausing rendering of the performance characteristics.2. The method of claim 1 , wherein wirelessly retrieving the data from the diagnostic device includes wirelessly retrieving the data from the diagnostic device via radio frequencies allocated for exclusive medical usage.3. The method of claim 1 , wherein wirelessly retrieving the data regarding the one or more implanted artificial heart pumps comprises:continuously retrieving, via the one or more portable diagnostic devices, the data regarding the one or more implanted artificial heart pump.4. The method of claim 3 , wherein the retrieved data is representative of at least one of speed setting input claim 3 , estimated instantaneous and average blood flow rate over a specified time interval claim 3 , variable power consumption claim 3 , or proprietary preprogrammed alarm notifications of the one or more implanted artificial heart pumps.5. The method of claim 1 , wherein claim 1 , in an instance in ...

PUMP AND METHOD FOR MIXED FLOW BLOOD PUMPING

A blood pump includes a housing and a rotor within the housing configured to rotate along an axis. The rotor may include a hub, the hub having regions with blades and regions without blades. The regions without blades may have a constant outer diameter and may extend along at least one fourth the length of the hub. The regions with blades may have an increasing outer diameter. Blades may be disposed on a downstream end region of the hub and extend downstream of the hub. Blades may begin approximately halfway along the axial length of a motor stator located about a hub and extend downstream of the motor stator. Blades may have portions that produce axial fluid flow and radial fluid flow with improved flow characteristics. 1. A blood pump comprising:a housing; anda rotor within the housing configured to rotate along an axis, the rotor including:a hub that has an axial length, the hub having (i) a first region where no blades are located, the first region having a constant outer diameter and extending along at least one fourth of the length of the hub, and (ii) a blade region located downstream of the first region, wherein the outer diameter of the hub increases along the blade region in a downstream direction; andblades disposed on the blade region that are configured to produce axial fluid flow in the direction of the axis and radial fluid flow in a direction radially outward from the axis.2. The blood pump of claim 1 , wherein each of the blades extends along between one third and two thirds of the axial length of the hub.3. The blood pump of claim 1 , wherein the outer diameter of the hub increases with a linear taper over the blade region.4. The blood pump of claim 1 , wherein the outer diameter of the hub increases over the entire blade region.5. The blood pump of claim 1 , wherein each of the blades wraps around approximately 170 degrees of the hub about the axis.6. The blood pump of claim 1 , wherein the pump includes a motor stator having an upstream region ...

Method of manufacturing centrifugal pump

A centrifugal blood pump prevents a shaft member from oscillating due to expansion of a pump housing resulting from pressurization of the blood. The centrifugal blood pump is manufactured by assembling a bottom member 21 and a lid member 22, and compressing them in a direction in which the bottom member 21 and the lid member 22 approach each other by a deformation amount along their outer circumferential walls. The lid member and the bottom member are joined while in the compressed state in order to create a preloading force between the shaft member and bearings to resist the expansion due to pressurization of the blood during use.

INTRAVASCULAR FLUID MOVEMENT DEVICES, SYSTEMS, AND METHODS OF USE

Devices for moving blood within a patient, and methods of doing so. The devices can include a pump portion that includes an impeller and a housing around the impeller, as well as a fluid lumen. The impeller can be activated to cause rotation of the impeller and thereby move fluid within the fluid lumen. 1. An intravascular blood pump , comprising:a collapsible housing comprising a fluid lumen, the fluid lumen having a distal end and a proximal end;a collapsible distal impeller axially spaced from a collapsible proximal impeller, at least a portion of the distal impeller and the proximal impeller disposed axially between the distal end and the proximal end of the fluid lumen,wherein the distal impeller has an expanded configuration in an expanded state, and the proximal impeller has an expanded configuration in an expanded state, andwherein the expanded configuration of the distal impeller is different than the expanded configuration of the proximal impeller.2. A blood pump of claim 1 , wherein the collapsible distal impeller has a distal blade and the proximal impeller has a proximal blade claim 1 , wherein the distal blade has a different pitch than the proximal blade.3. A blood pump of claim 2 , wherein the distal blade is one of a plurality of distal blades claim 2 , and wherein the proximal blade is one of a plurality of proximal blades claim 2 , wherein the plurality of distal blades have a different pitch than each of the plurality of proximal blades.4. A blood pump of claim 2 , wherein the proximal impeller is shaped claim 2 , dimensioned and positioned to provide predominantly centrifugal flow and the distal impeller is shaped and dimensioned to provide predominantly axial flow.5. A blood pump of claim 1 , wherein distal impeller and proximal impeller are adapted and configured to move fluid in the same direction.6. An intravascular blood pump claim 1 , comprising:a collapsible housing comprising a fluid lumen, the fluid lumen having a distal end and a ...

Flexible catheter with a drive shaft

The invention relates to a flexible catheter (1) with a drive shaft (2), with a sleeve (6) surrounding the drive shaft (2) and with a sheath (7) surrounding the drive shaft (2) and the sleeve (6), wherein the drive shaft, the sleeve (6) and the sheath (7) are pliable, wherein the drive shaft (2) at a proximal end of the drive shaft (2) comprises a coupling element (5) for connecting the drive shaft (2) to a drive motor (18), wherein the drive shaft (2) at least regionally consist of a alloy which contains at least 10% by weight of chromium, nickel and cobalt in each case. The invention moreover relates to a blood pump arrangement with such a catheter.

PUMP, IN PARTICULAR A BLOOD PUMP

The present invention relates to a pump, in particular a blood pump having a proximal and a distal end and a pump housing arranged therebetween, a driveshaft arranged in an interior of the pump housing along the longitudinal direction, a conveying element arranged on the driveshaft, and a cannula. Here, the pump housing, the shaft arrangement and the conveying element are coordinated with one another in such a way that these guarantee the best possible efficiency and longevity of the pump. 120-. (canceled)21. A pump , in particular a blood pump , comprising:a pump housing having a proximal end, a distal end, a region of the proximal end, and a region of the distal end,a driveshaft arranged in an interior of the pump housing along a longitudinal axis; anda conveying element arranged on the driveshaft,wherein the pump housing comprises at least one pump-receiving portion and a proximal portion arranged proximally of the pump-receiving portion, and can be transferred in a radial direction extending transversely to the longitudinal direction from a compressed state into an expanded state; andwherein the driveshaft is pivotable on a proximal bearing, the proximal bearing located in the region of the proximal end of the pump housing,wherein the driveshaft is configured in such a way that a bending resistance of the driveshaft in a region of the proximal portion of the pump housing and distal of the proximal bearing is coordinated with a bending resistance of the proximal portion, such that when the pump housing bends the conveying element is arranged substantially concentrically within the pump-receiving portion.22. The pump according to claim 21 , wherein the conveying element comprises at least one foldable segment claim 21 , wherein the at least one foldable segment is configured to collapse in response to an application of a torque.23. The pump according to claim 21 , wherein the pump housing also comprises a distal portion arranged distally of the pump-receiving ...

SYSTEMS AND METHODS FOR REDUCING PRESSURE AT AN OUTFLOW OF A DUCT

Various systems and methods are provided for reducing pressure at an outflow of a duct such as the thoracic duct or the lymphatic duct. In one embodiment, an indwelling catheter can be configured to be at least partially implanted within a vein of a patient in the vicinity of an outflow port of a duct of the lymphatic system. The catheter can include first and second restrictors each configured to at least partially occlude the vein within which the catheter is implanted and thus to restrict fluid flow within the vein when the restrictors are activated. The restrictors can each be configured to move between an activated configuration, in which the restrictor occludes the vein, and a relaxed configuration, in which the restrictor does not occlude the vein. The catheter can include a pump, such as an axial motor pump, configured to pump fluid through the catheter. 186-. (canceled)87. A system for treatment of edema in a subject , the system comprising:an introducer sheath;a catheter dimensioned to be inserted through the introducer sheath, the catheter comprising a retracted configuration and a deployed configuration, wherein in the deployed configuration, the catheter comprises a suction lumen and a fluid bypass lumen; anda pump external to the subject;wherein the system is configured such that the pump is operably coupled to the suction lumen of the catheter to receive fluid from the subject, and return the fluid to the subject via the introducer sheath.88. The system of claim 87 , wherein when the catheter is in the deployed configuration claim 87 , the catheter comprises first and second restrictors disposed along the fluid bypass lumen.89. The system of claim 88 , wherein the catheter is dimensioned to be inserted into a jugular vein of a patient such that the first and second restrictors flank a lymphatic outflow duct.90. The system of claim 88 , wherein when the catheter is in the deployed configuration claim 88 , the fluid bypass lumen is defined by a membrane ...

MAGNETIC DRIVING PUMP DEVICE

A magnetic driving pump device includes: an impeller; driven bodies integrally rotating together with the impeller and including permanent magnets; a drive unit including a magnet body on which a permanent magnet is placed such that when the drive unit rotates around a predetermined axis, different magnetic poles alternately appear on an outer periphery of the drive unit; and a rotation actuator rotating the magnet body around its axis. The magnet body is arranged side-by-side with respect to the driven bodies in a state that an axis of the magnet body is oriented to a direction which is not at right angles with respect to a rotation center of the impeller, and the impeller is rotated through the driven bodies by rotating the magnet body by the rotation actuator. 1: A magnetic driving pump device comprising:an impeller rotatably placed in a pump chamber of a pump case;driven bodies integrally rotating together with the impeller and including permanent magnets placed on the driven bodies such that when the driven bodies are rotated, different magnetic poles alternately appear on outer peripheries of the driven bodies;a drive unit provided outside the pump chamber and giving a rotating magnetic field to the driven bodies in a non-contact manner to rotate the impeller with respect to the pump case, a magnet body on which a permanent magnet is placed such that when the drive unit rotates around a predetermined axis, different magnetic poles alternately appear on an outer periphery of the drive unit; and', 'a rotation actuator rotating the magnet body around its axis, wherein, 'the drive unit includingthe magnet body is arranged side-by-side with respect to the driven bodies in a state where an axis of the magnet body is oriented to a direction which is not at right angles with respect to a rotation center of the impeller, and the impeller is rotated through the driven bodies by rotating the magnet body by the rotation actuator.2: The magnetic driving pump device ...

Dual-Pump Continuous-Flow Total Artificial Heart

A total artificial heart for a mammalian cardiovascular system is provided. The total artificial heart has a pump casing including an outer housing and an integral hollow support shaft extending therethrough. The casing defines a first flow path within the outer housing about an exterior of the hollow support shaft and a separate second flow path extending within the hollow support shaft. An annular impeller is housed within the outer housing of the casing for rotation about the hollow support shaft to provide a centrifugal flow pump in the first flow path, and an axial flow impeller is housed within the hollow support shaft of the casing for forming an axial flow pump in the second flow path. 1. A pump , comprising:a centrifugal flow pump having an annular impeller with a central opening; andan axial flow pump having an axial flow impeller;said axial flow pump being integrated with said centrifugal flow pump such that said axial flow pump extends through said central opening of said annular impeller of said centrifugal flow pump.2. A pump according to claim 1 , wherein said axial flow impeller of said axial flow pump is positioned to extend within said central opening of said annular impeller of said centrifugal flow pump.3. A pump according to claim 1 , wherein an axis of rotation of said axial flow impeller of said axial flow pump is parallel or tilted at an angle of less than about 5° relative to an axis of rotation of said annular impeller of said centrifugal flow pump.4. A pump according to claim 1 , wherein said annular impeller of said centrifugal flow pump and said axial flow impeller of said axial flow pump each rotate about a common axis of rotation.5. A pump according to claim 1 , further comprising a casing for housing said annular impeller of said centrifugal flow pump claim 1 , wherein said casing includes a hollow support shaft extending through said central opening of said annular impeller of said centrifugal flow pump about which said annular ...

CATHETER DEVICE

The catheter device comprises a motor at the proximal end of the catheter device and a drive shaft, extending from the proximal end section to the distal end section of the catheter device, for driving a rotating element located at the distal end of the catheter device. The catheter device also comprises a hose-like catheter body which encompasses the drive shaft and extends from the proximal end section to the distal end section. At the proximal end of the catheter device, the drive shaft is connected to a motor by a clutch. The clutch is a magnetic clutch with a proximal and a distal magnet unit. The proximal magnet unit is connected to the motor and the distal magnet unit to the drive shaft. The distal magnet unit is mounted fluid-tight in a clutch housing. The proximal end of the catheter body makes a fluid-tight connection with the clutch housing. 110-. (canceled)11. A percutaneous heart pump system being configured for percutaneous insertion through a vascular system of a patient and positioning across an aortic valve , comprising:a catheter having a tubular pump housing disposed at a distal portion of the catheter, the pump housing having distal inlet holes and proximal outlet holes and a tubular fluid flow surface that extends between the inlet and outlet holes and forms a contact interface for positioning across the aortic value;a radially compressible helical rotor disposed within the pump housing, wherein the rotor includes a central bore;a drive shaft disposed within the pump housing and having a proximal drive shaft portion and a distal drive shaft portion, wherein the proximal drive shaft portion is configured to couple to a motor and the distal drive shaft portion extends through the central bore of the rotor and is configured to rotate the rotor within the pump housing;a body cap having a distal tip and a proximal opening; and a proximal opening,', 'a distal opening, and', 'an interior cylindrical surface that surrounds the distal portion of the ...

Catheter device

The catheter device comprises a motor at the proximal end of the catheter device and a drive shaft, extending from the proximal end section to the distal end section of the catheter device, for driving a rotating element located at the distal end of the catheter device. The catheter device also comprises a hose-like catheter body which encompasses the drive shaft and extends from the proximal end section to the distal end section. At the proximal end of the catheter device, the drive shaft is connected to a motor by a clutch. The clutch is a magnetic clutch with a proximal and a distal magnet unit. The proximal magnet unit is connected to the motor and the distal magnet unit to the drive shaft. The distal magnet unit is mounted fluid-tight in a clutch housing. The proximal end of the catheter body makes a fluid-tight connection with the clutch housing.

LOW COST VENTRICULAR DEVICE AND SYSTEM THEREOF

A blood pump device comprising: a centrifugal blood pump having: a pump housing defining an inlet to receive blood and direct blood onto an impeller, the pump housing having a top bezel and a central column directed into the middle of a cavity within the pump housing; the impeller is adapted, in use, to rotate in the cavity around the central column and to be suspended on a pivot bearing mounted between the middle of the lower surface of the impeller and the middle of the upper surface of the central column; the impeller is stabilised, in use, by the rotation of blades generating a centrifugal force acting on the blades in radial direction away from the central column. 1. A blood pump device comprising:a centrifugal blood pump having: a pump housing defining an inlet to receive blood and direct blood onto an impeller, the pump housing having a top bezel and a central column directed into the middle of a cavity within the pump housing; the impeller is adapted, in use, to rotate in the cavity around the central column and to be suspended on a pivot bearing mounted between the middle of the lower surface of the impeller and the middle of the upper surface of the central column; the impeller is stabilised, in use, by the rotation of blades generating a centrifugal force acting on the blades in radial direction away from the central column.2. The device of claim 1 , wherein the impeller includes a plurality of blades extending radially away from a centre of the impeller claim 1 , the blades to force blood received at the inlet through the pump housing and to the outlet.3. The device of claim 2 , wherein all of the blades are joined about a central pivot mount and wherein each blade is joined to an adjacent blade with an elongated arm.4. The device of claim 1 , wherein a drive unit is attached and secured against an outer lower surface of the pump housing and wherein a protrusion from the upper surface of the drive unit engages with respective recess in the outer lower ...

SYSTEM AND METHOD TO INCREASE THE OVERALL DIAMETER OF VEINS

A system and method for increasing the speed of blood and wall shear stress (WSS) in a peripheral vein for a sufficient period of time to result in a persistent increase in the overall diameter and lumen diameter of the vein is provided. The method includes pumping blood at a desired rate and pulsatility. The pumping is monitored and adjusted, as necessary, to maintain the desired blood speed, WSS and pulsatility in the peripheral vein in order to optimize the rate and extent of dilation of the peripheral vein. 1. A system for persistently increasing a lumen diameter of a blood vessel prior to creation of an arteriovenous fistula or an arteriovenous graft in a patient , the system comprising:a pump-conduit assembly to remove blood from a donating vessel and pump blood into the blood vessel, the pump-conduit assembly including:a pump having a pump inlet and a pump outlet;a first conduit, the first conduit having an inlet configured to fluidly connect to a donating vessel, the first conduit configured for insertion and advancement into the donating vessel ; and an outlet fluidly connected to the pump inlet;a second conduit, the second conduit having a second inlet fluidly connected to the pump outlet and a second outlet to fluidly connect to the blood vessel, the second conduit configured to connect to the pump outlet and the second outlet configured for engagement to the blood vessel; anda control unit configured to control the pump and pump blood into the blood vessel such that the mean pulse pressure in the second conduit is less than 20 mmHg.2. The system of claim 1 , wherein the first conduit is configured for insertion into the subclavian vein claim 1 , jugular vein claim 1 , brachiocephalic vein claim 1 , superior vena cava claim 1 , femoral vein claim 1 , external iliac vein claim 1 , common iliac vein claim 1 , and inferior vena cava.3. The system of claim 3 , wherein claim 3 , the first conduit and a first portion of the second conduit comprises polyvinyl ...

BLOOD PUMP

Apparatus and methods are described, including a catheter () configured to be placed inside a blood vessel of a subject. A first impeller () is disposed on the catheter, and a second impeller () is disposed on the catheter, proximally to the first impeller. A support structure () is disposed upon the catheter such that a longitudinal center of the support structure is disposed between the first and second impellers, the support structure being configured to support an inner wall of the blood vessel in an open configuration in a region between the first and second impellers. Other applications are also described. 143-. (canceled)44. A method , comprising: cutting a tube such that the cut tube defines a structure having first and second end portions at proximal and distal ends of the structure, the end portions being connected to one another by a plurality of elongate elements;', 'causing the elongate elements to radially expand and form helical elongate elements, by axially compressing the structure;', 'coupling a respective reinforcement element to each of the helical elongate elements, such that each of the reinforcement elements extends from the helical elongate element toward a longitudinal axis of the structure;', 'coupling a material to the helical elongate elements, such that each of the helical elongate elements with the material coupled thereto defines a respective blade of the impeller,', 'the reinforcement elements being configured to reinforce central portions of respective blades of the impeller., 'manufacturing an impeller by45. The method according to claim 44 ,further comprising coupling an axial element to the structure such that the axial element extends along a longitudinal axis of the structure,wherein coupling the respective reinforcement element to each of the helical elongate elements, comprises coupling the respective reinforcement element to each of the helical elongate elements such that each of the reinforcement elements extends from a ...

BLOOD PUMP WITH IMPELLER RINSE OPERATION

A method of operating an implantable blood pump having a first stator, a second stator, and an impeller movably disposed there between. The method includes applying a first voltage waveform at first phase to the first stator to generate a magnetic field to rotate the impeller. A second voltage waveform is applied at a second phase shifted from the first phase to the second stator to rotate the impeller, the second voltage waveform is asymmetric to the first voltage waveform. 1. A method of operating an implantable blood pump having a first stator , a second stator , and an impeller movably disposed there between , the method comprising:applying a first voltage waveform at first phase to the first stator to generate a magnetic field to rotate the impeller;applying a second voltage waveform at a second phase shifted from the first phase to the second stator to rotate the impeller, the second voltage waveform being asymmetric to the first voltage waveform.2. The method of claim 1 , wherein applying the second voltage waveform includes phase delaying the application of the second voltage by 60 degrees.3. The method of claim 1 , wherein the first voltage waveform is a square wave.4. The method of claim 1 , wherein the second voltage waveform is a square wave.5. The method of claim 1 , wherein the second voltage waveform is trapezoidal.6. The method of claim 1 , wherein applying the first voltage waveform occurs while the impeller is rotating.7. The method of claim 1 , wherein the first voltage waveform and the second voltage waveform each have transition steps between positive and negative polarities of their respective waveforms claim 1 , and wherein the first voltage waveform and the second voltage waveform each have the same polarity at their respective transition steps.8. The method of claim 7 , wherein the duration of the transition steps of the first voltage waveform and the second voltage waveform range from 1-30 electrical degrees.9. The method of claim 1 , ...

CATHETER-BASED PUMP FOR IMPROVING ORGAN FUNCTION

Apparatus, systems, and methods in which a catheter-based pump is used are disclosed. The catheter-based pump is placed within the inferior vena cava of a patient. The catheter-based pump has a variable obstructor, such as a balloon or some other artificial obstruction, which is sized and dimensioned to compartmentalize the inferior vena cava into an upstream region and a downstream region of the inferior vena cava. The catheter-based pump is configured to pump blood from the upstream region to a fluid line that discharges blood to a discharge location in the downstream region. Thus, a suitable pressure gradient across the organ is provided, which can benefit organ function. 1. A system for improving renal function in a patient , the system comprising:a catheter-based pump including a variable obstructor configured to be placed entirely within an inferior vena cava of the patient at a position downstream of a renal vein ostium, wherein the variable obstructer has a size and is dimensioned to compartmentalize the inferior vena cava into an upstream region and a downstream region; andwherein the catheter-based pump is configured to pump blood from the upstream region to a fluid line configured to discharge the blood to a discharge location in the downstream region, wherein the catheter-based pump is sized and dimensioned to be implanted entirely in the inferior vena cava, andwherein the fluid line includes an inlet for blood configured to be positioned in the upstream region of the inferior vena cava and an outlet for blood configured to be positioned in the downstream region of the inferior vena cava.2. The system of claim 1 , wherein the variable obstructor claim 1 , when fully inflated claim 1 , has a diameter between 12 and 30 mm claim 1 , inclusive.3. The system of claim 1 , wherein the catheter-based pump is an implantable impeller pump.4. The system of claim 1 , wherein the catheter-based pump is dimensioned to draw blood upstream of the renal vein ostium.5. ...

CATHETER PUMP WITH OFF-SET MOTOR POSITION

A catheter pump assembly is provided that includes an elongate body, an elongate flexible shaft disposed in the elongate body, and an impeller coupled with the distal end of the elongate flexible shaft. The drive system includes a drive component, a motor and a tension member. The tension member is coupled with the motor and the drive component and to cause the drive component to rotate, and thereby to cause the impeller to rotate. 110-. (canceled)11. A catheter pump assembly , comprising: an elongate body having a proximal end and a distal end, a first lumen and a second lumen extending between the proximal and distal ends;', 'an elongate flexible shaft having a proximal end and a distal end and extending through the first lumen;', 'an impeller disposed distal of the distal end of the elongate flexible shaft;', 'a driven component coupled with the proximal end of the elongate flexible shaft and supported for rotation adjacent to the proximal end of the elongate body and; and', 'an outflow port disposed proximal of the driven component;, 'a catheter assembly, comprisingan operating fluid system including a source of operating fluid in communication with the second lumen of the elongate body, the operating fluid flowable into the second lumen and distally within the elongate body and thereafter proximally in the first lumen to cool and/or lubricate the elongate flexible drive shaft and the driven component; anda drive system comprising a motor and a transmission for transferring torque to the driven component, the motor disposed laterally of the outflow port such that the operating fluid can be removed from the catheter assembly through the outflow port proximally of the driven component without flowing through the motor.12. The catheter pump assembly of claim 11 , wherein the transmission comprises a flexible tension member disposed between a first speed and torque transfer member disposed on an output shaft of the motor and a second speed and torque transfer member ...

CATHETER DEVICE

The catheter device comprises a motor located at the proximal end of the catheter device and a drive shaft, extending from the proximal end section to the distal end section of the catheter device, for driving a rotating element located at the distal end of the catheter device. The catheter device also comprises a hose-like catheter body which encompasses the drive shaft and extends from the proximal end section to the distal end section of the catheter device. At the proximal end of the catheter device, the drive shaft is connected to a motor by a clutch. The clutch is a magnetic clutch with a proximal and a distal magnet unit. The proximal magnet unit is connected to the motor and the distal magnet unit to the drive shaft. The distal magnet unit is mounted fluid-tight in a clutch housing. The proximal end of the catheter body makes a fluid-tight connection with the clutch housing. 110-. (canceled)11. A catheter device comprising:a drive shaft;a rotor connected to the drive shaft;a pump head; anda covering;wherein:the pump head comprises an expandable and compressible pump housing with a continuous tubular mesh structure having apertures;the pump housing comprises a plurality of sections of the continuous tubular mesh structure arranged between a distal end of the housing and a proximal end of the housing, the plurality of sections including an intake section and a pump section;the pump section includes the rotor;a transition section is formed in the mesh structure between the pump section and the intake section;at least some of the apertures of the mesh structure in the transition section are larger than all of the apertures of the mesh structure in the pump section; andthe covering covers at least some of the apertures in the pump section when the pump head is in an expanded state.12. The catheter device of claim 11 , wherein the apertures in the intake section are larger than the apertures in the transition section.13. The catheter device of claim 12 , wherein ...

AXIAL FLOW ROTOR WITH DOWNSTREAM BEARING WASH FLOW

An implantable blood pump includes an impeller rotatable about a rotational axis, having a body with a bottom surface at a downstream end and a central opening centered about the axis extending at least partially through the body from the bottom surface. A projecting element, e.g., a shaft, extends from below the bottom surface into or through the opening to support the impeller. The body can be configured to drive a primary downstream blood flow along an exterior of the body to beyond a peripheral edge of the bottom surface, and to provide a secondary downstream blood flow through the opening and along the bottom surface to beyond the peripheral edge, the secondary flow improving washing of a bearing surface. 1. An impeller for a blood pump , comprising:a body having a bottom surface at a downstream end of the body and a central opening extending at least partially through the body from the bottom surface, the central opening centered about a rotational axis of the body,the body being configured to rotate about an element projecting from a surface below the bottom surface into the opening to drive a primary blood flow along an exterior of the body to beyond a peripheral edge of the bottom surface, and the body configured to drive a secondary blood flow through the opening and along the bottom surface beyond the peripheral edge.2. The impeller of claim 1 , wherein the body comprises a plurality of ridges protruding in an axial direction below portions of the bottom surface claim 1 , the ridges defining a plurality of fluid channels for driving the secondary flow between the opening and the peripheral edge.3. The impeller of claim 2 , wherein the ridges are blades elongated in a direction from the opening towards the peripheral edge.4. The impeller of claim 3 , wherein the fluid channels have arcuate shape.5. The impeller of claim 3 , wherein the ridges have straight walls defining the plurality of fluid channels.6. The impeller of claim 5 , wherein the ridges taper ...

PERCUTANEOUS HEART PUMP

Disclosed herein are heart pumps that can include a catheter body and an impeller coupled with a distal end of the catheter body. The impeller can include a tip that is resealable or that includes a resealable member. The heart pump can also include a diffuser disposed between the distal end of the catheter body and the impeller, wherein the diffuser includes a flow directing surface. 123-. (canceled)24. A heart pump comprising:a catheter body including a proximal end, a distal end, and an elongate body extending between the proximal end and the distal end;a housing coupled to the distal end of the catheter body and including a distal opening and a proximal opening;an impeller coupled to the distal end of the catheter body and positioned within the housing; anda diffuser including a flow directing surface and disposed between the distal end of the catheter body and the impeller, the diffuser positioned within the housing and adjacent the proximal opening of the housing.25. The heart pump of claim 24 , wherein the diffuser is transitionable between an expanded configuration and a collapsed configuration claim 24 , wherein the diffuser has a first diameter in the expanded configuration claim 24 , and wherein the diffuser has a second diameter in the collapsed configuration that is smaller than the first diameter.26. The heart pump of claim 24 , further comprising a bearing assembly that includes a cavity that is configured to direct infusant through the bearing assembly and into the diffuser.27. The heart pump of claim 26 , wherein the diffuser further includes an outlet that is configured to direct the infusant out of the heart pump.28. The heart pump of claim 27 , wherein the outlet is located at a distal end of the diffuser.29. The heart pump of claim 27 , wherein the outlet is located at a proximal end of the diffuser.30. The heart pump of claim 26 , wherein the diffuser is configured to expand in response to the infusant being directed into the diffuser.31. The ...

DEVICE TO ASSIST THE PERFORMANCE OF A HEART

In a catheter () to assist the performance of a heart () with at least one pump (), the pump is formed as a rotary pump at the distal end of the catheter (), the rotor () lying distally on the outer side being coupled via a magneto coupling with a drive wheel (), formed as a hydraulically or pneumatically operated paddle wheel, arranged inside the catheter (). The driving fluid is supplied to the paddle wheel via a lumen () of the catheter () and is carried off via a further lumen () of the catheter. 1726212222232. A catheter to assist the performance of a heart with at least one pump, characterised in that the pump () is formed as a rotary pump at the distal end of the catheter (), the rotor () lying distally at the outside being coupled via a magneto coupling with a drive wheel () which is arranged inside the catheter () and is formed as a hydraulically or pneumatically operated paddle wheel and the driving fluid being supplied to the paddle wheel via a lumen () of the catheter () and being carried off via a further lumen () of the catheter (). This application is a continuation of and claims priority to U.S. application Ser. No. 14/454,965, filed on Aug. 8, 2014, which is a continuation of and claims priority to U.S. application Ser. No. 13/555,318, filed on Jul. 23, 2012, which is a divisional of and claims priority to U.S. application Ser. No. 12/449,632, filed on Aug. 18, 2009, which is the U.S. national phase of International Application PCT/IB2008/000421, filed on Feb. 27, 2008, which designated the U.S. and claims benefit of AT A 306/2007, filed Feb. 27, 2007, the entire contents of these prior applications are hereby incorporated by reference.The invention relates to a catheter to assist the performance of a heart with at least one pump.After a heart failure, for example a cardiac infarction or other reasons for the decrease in the performance of a heart, it is of essential importance for intensive care medicine to normalise and stabilise the cardiac ...

ATTACHMENT MECHANISMS FOR MOTOR OF CATHETER PUMP

A catheter pump includes an impeller and a drive shaft coupled with the impeller. The catheter pump includes a motor assembly coupled with the drive shaft. The motor assembly includes a motor housing having an opening through a wall of the motor housing and a flexible member disposed about the opening, the flexible member configured to engage a connection portion of a platform. 1. A catheter pump system comprising:an impeller;a drive shaft coupled with the impeller; anda motor assembly coupled with the drive shaft, the motor assembly comprising a motor housing having an opening through a wall of the motor housing and a flexible member disposed about the opening, the flexible member configured to engage a connection portion of a platform.2. The catheter pump system of claim 1 , further comprising the platform.3. The catheter pump system of claim 2 , wherein the platform includes a clamp or a band sized and shaped to be disposed about a portion of a patient.4. The catheter pump system of claim 1 , wherein the connection portion of the platform comprises a projection having a groove formed about a perimeter of the projection claim 1 , wherein the motor assembly is secured to the platform by inserting the projection into the opening such that the flexible member is captured in the groove.5. A kit for a catheter pump system comprising:an impeller;a drive shaft coupled with the impeller;a motor assembly coupled with the drive shaft, the motor assembly comprising a connector;a first platform to be mounted to a patient or a structure to support the motor assembly, the first platform configured to attach to the motor assembly by way of the connector; anda second platform to be mounted to the patient or the structure to support the motor assembly, the second platform configured to attach to the motor assembly by way of the connector.6. The kit of claim 5 , wherein the first platform comprises a band or a clamp.7. A medical device housing claim 5 , comprising:a housing ...

BLOOD FLOW SYSTEM WITH OPERATOR ATTACHABLE COMPONENTS

A system for pumping blood in a patient comprises multiple components including a rotational drive assembly; a fluid drive element; a housing, an inflow cannula assembly and an outflow graft assembly. The inflow cannula assembly comprises an inflow conduit and an inflow connector. The outlet graft assembly comprises an outflow conduit and an outflow connector. The housing surrounds the fluid drive element and comprises an inflow port and an outflow port. The inflow conduit comprises a first end operably attachable to the inflow port and a second end fluidly connectable to a source of oxygenated blood. The outflow conduit comprises a first end operably attachable to the outflow port and a second end fluidly connectable to a blood vessel. The inflow connector operably connects the inflow conduit to the inflow port. The outflow connector operably connects the outflow conduit to the outflow port. 1. A system for pumping blood in a patient comprising:a rotational drive assembly;a fluid drive element;a housing, surrounding the fluid drive element, and comprising an inflow port and an outflow port; an inflow conduit with a proximal end and a distal end, wherein the distal end is operably attachable to the inflow port and the proximal end is fluidly connectable to a source of oxygenated blood; and', 'an inflow connector constructed and arranged to operably connect the inflow conduit to the inflow port; and, 'an inflow cannula assembly comprising an outflow conduit with a proximal end and a distal end, wherein the proximal end is operably attachable to the outflow port and the distal end is fluidly connectable to a blood vessel; and', 'an outflow connector constructed and arranged to operably connect the outflow conduit to the outflow port., 'an outflow graft assembly comprising'}2. The system of wherein the inflow cannula assembly is constructed and arranged to provide feedback of proper attachment.3. The system of wherein the feedback comprises feedback selected from the ...

THERMOFORM CANNULA WITH VARIABLE CANNULA BODY STIFFNESS

A cannula supporting a percutaneous pump can include a proximal section with a first flexural modulus. The cannula can include one or more distal sections with a flexural modulus that is different than the first flexural modulus. The material and its arrangement along the length of the cannula can be selected so as to influence bending properties. This can, for example, allow efficient positioning of the cannula in a desired location without displacing the guidewire. 1. A system for the insertion of a percutaneous pump , the system comprising:a cannula having a proximal inlet, a proximal section, a first distal section, and a distal outlet;a percutaneous pump configured to couple to the proximal inlet; anda transition zone between the proximal section and the first distal section,wherein the proximal section has a first flexural modulus and the first distal section has a second flexural modulus which is smaller than the first flexural modulus.2. The system of claim 1 , wherein the transition zone is a fused transition zone.3. The system of claim 2 , wherein the fused transition zone is a thermally fused transition zone.4. The system of claim 1 , wherein the first flexural modulus is configured to increase a buckling force of the cannula and the second flexural modulus is configured to match a flexural modulus of a guidewire on which the cannula is backloaded.5. The system of claim 1 , wherein the distal outlet is configured to be inserted in a right ventricle of a heart.6. The system of claim 1 , wherein the proximal section of the cannula includes a proximal inner wall made of a first material and a proximal outer wall made of a second material claim 1 , wherein a flexural modulus of the second material is greater than a flexural modulus of the first material.7. The system of claim 1 , wherein the first flexural modulus is equal to or greater than 23 claim 1 ,000 psi claim 1 , and the second flexural modulus is equal to or lower than 15 claim 1 ,000 psi.8. The ...

PUMP DEVICE HAVING A DETECTION DEVICE

The invention relates to a pump device having a pump () and an energy supply device (), wherein the pump has a conveying element () which conveys a fluid by means of supplied energy, wherein the pump has a transport state and an operating state, and wherein at least one first element () of the pump has a different shape and/or size in the transport state than in the operating slate. The operating safety of such a pump device is increased by a detection device () which detects whether at least the first element is in the operating state with respect to shape and/or size by means of a sensor. 115-. (canceled)16. An intravascular pump device , comprising:a first catheter having a proximal end and a distal end;a pump head configured to compress into a compressed state and expand into an expanded state, wherein the pump head is configured to move within the first catheter and the pump head elastically expands into the expanded state upon release from the first catheter;the pump head having a rotor with impeller blades, the impeller blades being elastically compressible and automatically elastically expandable, wherein the impeller blades are configured to convey a fluid by a supplied energy; anda sensor configured to produce an output signal indicative of a load on the rotor.17. The pump device of claim 16 , wherein the sensor is configured to produce the output signal by detecting electrical current driving the rotor.18. The pump device of claim 16 , the intravascular pump device configured to modify a transfer of the supplied energy based on the output signal from the sensor.19. The pump device of claim 18 , wherein the intravascular pump device is configured to interrupt transfer of the supplied energy based on the output signal from the sensor.20. The pump device of claim 17 , wherein the detected electrical current is higher when the pump head is not in the expanded state than when the pump head is in the expanded state.21. The pump device of claim 17 , further ...

VENTRICULAR ASSIST DEVICE

Apparatus and methods are described including a blood pump that includes an impeller that has proximal and distal bushings, and is configured to pump blood through a subject's body. A frame, which includes proximal and distal bearings, is disposed around the impeller. An axial shaft passes through the proximal and distal bearings of the frame and the proximal and distal bushings of the impeller. The axial shaft is coupled to at least one of the proximal and distal bushings of the impeller, such that the at least one bushing is held in an axially-fixed position with respect to the axial shaft, and is not held in an axially-fixed position with respect to the proximal and distal bearings. Other applications are also described. 1. An apparatus , comprising: ["an impeller comprising proximal and distal bushings, and configured to pump blood through a subject's body;", 'a frame configured to be disposed around the impeller, the frame comprising proximal and distal bearings;', being coupled to at least one of the proximal and distal bushings of the impeller, such that the at least one bushing is held in an axially-fixed position with respect to the axial shaft, and', 'not being held in an axially-fixed position with respect to the proximal and distal bearings., 'an axial shaft configured to pass through the proximal and distal bearings of the frame and the proximal and distal bushings of the impeller, the axial shaft], 'a blood pump comprising2. The apparatus according to claim 1 , wherein the blood pump does not include any thrust bearing configured to be disposed within the subject's body.3. The apparatus according to claim 1 , wherein the blood pump further comprises one or more thrust bearings configured to be disposed outside the subject's body claim 1 , and wherein opposition to thrust generated by the rotation of the impeller is provided solely by the one or more thrust bearings disposed outside the subject's body.4. The apparatus according to claim 1 , further ...

Bearingless implantable blood pump

Implantable blood pumps and related methods employ a compact rotary motor. The compact rotary motor includes a stator and a rotor. The stator includes a stator core and stator coils. The stator core includes a toroidal portion. Each of the stator coils extends around a respective segment of the toroidal portion. The stator being disposed within the housing circumferentially about the dividing wall such that the blood flow conduit extends through the stator core. The stator core is disposed circumferentially around at least a portion of the rotor.

MOTOR ASSEMBLY WITH HEAT EXCHANGER FOR CATHETER PUMP

A catheter pump is disclosed. The catheter pump can include an impeller and a catheter body having a lumen therethrough. The catheter pump can also include a drive shaft disposed inside the catheter body. A motor assembly can include a chamber. The motor assembly can include a rotor disposed in the at least a portion of the chamber, the rotor mechanically coupled with a proximal portion of the drive shaft such that rotation of the rotor causes the drive shaft to rotate. The motor assembly can also comprise a stator assembly disposed about the rotor. The motor assembly can also include a heat exchanger disposed about the stator assembly, the heat exchanger may be configured to direct heat radially outward away from the stator assembly, the rotor, and the chamber. 141-. (canceled)42. A catheter pump system comprising:an impeller;a catheter body having a supply lumen therethrough, and through which a first fluid is supplied to a distal portion of the catheter body;a drive shaft disposed inside the catheter body and coupled with the impeller at a distal portion of the drive shaft; and a rotor mechanically coupled with a proximal portion of the drive shaft; and', 'a stator assembly disposed about the rotor and configured to cause the rotor to rotate; and, 'a motor assembly comprisinga heat exchanger coupled with the motor assembly to remove heat therefrom, the heat exchanger comprising a volume to receive a second fluid, wherein the heat exchanger is disposed about a portion of the stator assembly, and wherein the volume is in fluid isolation from the supply lumen of the catheter body.43. The catheter pump system of claim 42 , wherein the first fluid is a biocompatible coolant fluid.44. The catheter pump system of claim 42 , wherein the second fluid is a non-biocompatible coolant fluid.45. The catheter pump system of claim 44 , wherein the second fluid comprises a refrigerant.46. The catheter pump system of claim 44 , wherein the second fluid comprises a compressed gas. ...

BLOOD CIRCULATION SYSTEM

An artificial heart and lung apparatus includes a roller pump; a blood removal line; a first blood transfer line; a blood removal rate sensor; a control unit that performs the linked control of the roller pump in correspondence with a blood removal rate; and a blood transfer rate adjustment unit that instructs the roller pump to transfer a blood transfer rate. The blood transfer rate adjustment unit includes an operation amount input unit to which an operation amount from an arbitrary circumferential position can be input, and which outputs a pulse signal according to the input operation amount. A counter adds and subtracts pulse signals output from the operation amount input unit, and outputs a resultant as blood transfer rate adjustment data. The counter performs a counting operation with respect to the circumferential position of the operation amount input unit when blood transfer control transitions to the normal control. 1. A blood circulation system that can be connected to a human body , and transfers removed blood to the human body via a blood transfer pump , the system comprising:the blood transfer pump;a blood removal line through which removed blood flows to the blood transfer pump;a blood transfer line that transfers blood, which is sent from the blood transfer pump, to the human body;blood removal rate measurement means that is provided in the blood removal line;a control unit that performs the linked control of the blood transfer pump in correspondence with a blood removal rate measured by the blood removal rate measurement means such that a blood transfer rate of the blood transfer pump is in a specific range with respect to the blood removal rate; andblood transfer rate instruction means for instructing a target blood transfer rate of the blood transfer pump in normal control in which the blood transfer pump transfers blood independently from the blood removal rate,wherein the blood transfer rate instruction means includes a blood transfer rate ...