КАТЕТЕР ДЛЯ ЭНДОТЕРАПИИ

... 1. Катетер для эндотерапии, предназначенный для клинического и/или предклинического и/или лабораторного использования, который может обеспечивать одновременную инфузию и отсасывание жидкостей, содержащий инфузионную полость - трубку (2), соединенную на ее проксимальном конце с насосом или баллоном и любым аппаратом (14), который содержит жидкости для инфузии под положительным давлением относительно давления на дистальном конце катетера, и всасывающую полость - трубку (1), соединенную на ее проксимальном конце с насосом или баллоном или любым другим аппаратом (15), который улавливает жидкость под отрицательным давлением относительно давления на дистальном конце катетера, и фильтр или мембрану или сетку или сетчатый каркас, через который имеет место инфузия и всасывание, в котором усовершенствование содержит устройство (3), гидродинамически приводящееся в движение внутри фильтра или мембраны или сетки или сетчатого каркаса, которое направляет инфузионную жидкость через поверхность фильтра ...

УСТРОЙСТВА ЛЮМИНАЛЬНЫЕ ВЖИВЛЯЕМЫЕ УСОВЕРШЕНСТВОВАННЫЕ

... 1. Устройство медицинское, содержащее:трубку, содержащую внешнюю поверхность с множеством канавок, проходящих вдоль продольной оси трубки; ивнешний кожух, окружающий трубку, в котором канавки и кожух образуют множество каналов, проходящих вдоль, по меньшей мере, одного участка продольной оси трубки, и в котором указанный кожух содержит пористый или проницаемый материал, за счет чего обеспечивается доставка лечебного средства из каналов через пористый и/или проницаемый материал кожуха.2. Устройство медицинское по п.1, в котором трубка является центральной трубкой медицинского устройства, и в котором трубка:(i) не содержит просветов,(ii) содержит, по меньшей мере, один просвет,(iii) содержит два просвета.3. Устройство медицинское по п.1, в котором устройство содержит множество выполненных с возможностью расширения согнутых секций, которые расширяются в крепежную секцию большего диаметра.4. Устройство медицинское по п.1, содержащее вспомогательную трубку, и в котором вспомогательная трубка ...

Koaxial-Katheter

MULTILUMENKATHETER ZUR MINIMIERUNG DER GLIEDISCHÄMIE

VERBINDUNGSSYSTEM FÜR EINEN PROXIMAL SCHNEIDBAREN KATHETER

Pleural manometry catheter

A pleural manometry catheter comprises a first tube 22, a second tube 4 and a pressure transducer 26 (e.g. a digital manometer); the first tube comprising a first end 8 which (in use) is disposed inside the pleural cavity and a second end 25 which (in use) projects from the pleural cavity, the first end of the tube having at least one aperture 24 such that pleural fluid flows through the aperture along a first flow path to the pressure transducer, and the second tube comprising a first end 8 which (in use) is disposed inside the pleural cavity and a second end 12 which projects from the pleural cavity to the exterior, at least one aperture 6 being disposed at or near the first end of the second tube such that fluid may flow along a second flow path through the aperture and along the tube to the second end of the tube, allowing fluid to be drained from the pleural cavity (for example into a syringe, 14 or other drainage device or system). The pressure transducer is configured to detect real-time ...

Flow assist device

DOUBLE LUMEN CATHETER

DIALYSESONDE

CATHETER SHANK WITH SEVERAL LINES AND FASTEN-CASH CATHETER HUB

MEDICAL DEVICE FOR THE PRODUCTION AND DELIVERY OF A WITH GAS ENRICHED LIQUID

MEHRLUMIGER CONTAINER CATHETER AND PROCEDURE FOR ITS PRODUCTION

DIALYSESONDE

CATHETER WITH PUMP

DEVICE TO KANÜLIERUNG A BLOOD-PROMINENT CONTAINER

DIVISIBLE MULTIPLE ONES CATHETER ARRANGEMENT

DEVICE WITH DOPPELLUMIGEM CATHETER

DIALYSIS PROBE.

CATHETER WITH SHIELDED POINT

CATHETER WITH SEVERAL LINES, IN PARTICULAR FOR HAEMIDIALYSE

AORTALE BALLONOCCLUSIONSKANÜLE

COAGULATE-RESISTANT MULTIPLE LUMEN CATHETER

DIАLYSЕSОNDЕ

DIАLYSЕSОNDЕ

DIАLYSЕSОNDЕ

DIАLYSЕSОNDЕ

DIАLYSЕSОNDЕ

DIАLYSЕSОNDЕ

DIАLYSЕSОNDЕ

DIАLYSЕSОNDЕ

DIАLYSЕSОNDЕ

DIАLYSЕSОNDЕ

DIАLYSЕSОNDЕ

DIАLYSЕSОNDЕ

Bent co-axial catheter

MULTI-LUMEN CATHETER WITH ATTACHABLE HUB

Catheters and method of manufacture

Triple lumen catheter

MULTIPLE LUMEN CATHETER FOR HEMODIALYSIS

A pleural manometry catheter

A pleural manometry catheter comprises two tubes and a pressure transducer. The first tube provides a first flow path from the pleural cavity to the pressure transducer. The second tube provides a second flow path from the pleural cavity such that fluid can be drained from the pleural cavity. The pressure transducer detects real-time changes in the fluid pressure of the first flow path, such that when in use, fluid is drained from the pleural cavity along the second tube, the sensor in communication with the first tube detects a concomitant drop in fluid pressure in the fluid in the first tube.

Cardioplegia catheter system

Venous return cannula with enhanced drainage

Multiple lumen catheter with an enlarged tip

VENOUS RETURN CATHETER

Two-staged venous cannula with expandable reinforcing member

MULTI-LUMEN CATHETER WITH ATTACHABLE HUB

The present invention is a multi-lumen catheter assembly having an selectively attachable hub including a multi-lumen catheter tube that has a proximal portion and a distal portion and a hub assembly that has a proximal portion and a distal portion, whereby the distal portion of the catheter tube is selectively attachable to the proximal portion of the hub assembly after subscutaneous insertion of the proximal protion of the catheter tube into a patient.

MULTI-LUMEN CATHETER WITH INTEGRATED CONNECTOR

... ²²²A multi-lumen catheter (10) and method for inserting same into a patient is ²disclosed. The catheter may include a single-lumen flush tube portion (14), ²the flush tube portion having a proximal end being connected to the distal end ²of the catheter tube such that the single lumen of the flush tube is in fluid ²communication with each of the lumens of the catheter tube. A connector (12) ²is provided having a longitudinal cavity (22), a coupling portion (24) near ²the distal end of the connector, and is in fluid communication with the lumen ²or lumens in the catheter tube. The coupling portion (24) of the cavity of the ²connector is configured to receive a mating coupling portion of a medical ²device such as a trocar. The catheter device facilitates the subcutaneous ²tunneling of the catheter after catheter tip placement, and simultaneous fluid ²communication with all of the catheter lumens.² ...

MULTI-LUMEN CATHETER WITH ATTACHABLE HUB

The present invention is a multi-lumen catheter assembly having an selectively attachable hub including a multi-lumen catheter tube that has a proximal portion and a distal portion and a hub assembly that has a proximal portion and a distal portion, whereby the distal portion of the catheter tube is selectively attachable to the proximal portion of the hub assembly after subscutaneous insertion of the proximal protion of the catheter tube into a patient.

INSTRUMENT DELIVERY DEVICE HAVING A MULTI-POSITION ROTARY ELEMENT

A delivery device for delivering an instrument through an intravenous catheter may include a housing, a rotary element disposed within the housing, and an instrument. In some embodiments, the rotary element may include a groove, which may extend around at least a portion of the circumference of the rotary element. In some embodiments, the instrument may be disposed within the groove and/or between the rotary element and the housing. In some embodiments, in response to rotation of the rotary element with respect to the housing, the instrument may be advanced distally through an port of the housing. In some embodiments, the instrument may include a guidewire, a probe, tubing, or a light tube.

DOUBLE LUMEN CATHETER TIP

DOUBLE LUMEN CATHETER TIP A double lumen catheter having a fluid intake lumen and fluid return lumen of equal cross-sectional area, separated by an internal divide wherein blood flow characteristics are increased and maintained in a continuous fashion by a series of apertures positioned on both the intake side and return side of the catheter is disclosed. The apertures are in such position and configuration that they communicate with one another to prevent the accumulation of fibrin or other matter within the lumens as fluid enters into or exits from those lumens.

CATHETER

A double lumen catheter made up of an elongated integral flexible plastic thin-walled tubular body extending from a proximal end part, through an intermediate part, to a distal end part, terminating in a tip. The intermediate part has an outer wall and an internal septum wall containing juxtaposed arterial and venous lumens. The terminal end of each lumen in the proximal part is adapted for connection to an access tube to hemodialysis apparatus. At the junction of the intermediate part and the distal part, the arterial lumen is terminated and the venous lumen continued at least part way to the tip of the distal part. The outside surface of the outer walls are continuous and smooth to offer minimum resistance to insertion into the body of a patient. The walls are also relatively thin to provide for lumens of relatively large cross-section compared to the total cross-section of the catheter body. Removable obturators are inserted in the lumens to prevent the catheter from buckling. The inner ...

METHOD AND APPARATUS FOR DELIVERY OF THERAPEUTIC AGENTS TO THE HEART

A method and system for delivering a therapeutic agent directly to the heart employing minimally invasive techniques and concepts. In particular. the delivery of vascular endothelial growth factors (VEGF) is performed endovascularly or endoxopically to a region of a patient's heart treated with transmyocardial revascularization (TMR). A system is provided for inducing cardioplegic arrest. An aortic occlusion device has an inflatable balloon which occludes the ascending aorta when inflated. Cardioplegic fluid may be infused through a lumen of the aortic occlusion device to stop the heart while the patient's circulatory system is supported on cardiopulmonary bypass_ A side-firing fiberoptic laser is introduced through the aortic occlusion device in the endovascular technique to perform TMR. Subsequently, a therapeutic agent delivery catheter is directed into one of the coronary arteries to deliver and dissipate the VEGF into the surrounding vascular plexus to promote angiogenesis stimulation ...

CATHETER INSERTION APPARATUS

CATHETER WITH OCCLUSION RESISTANT TIP

A catheter is provided that includes an elongated tubular body extending to a distal end. The tubular body has a first and a second lumen with a septum disposed therebetween. The tubular body includes a first wall that defines the first lumen and a second wall that defines the second lumen. A portion of the septum extends distally beyond the first lumen and the second lumen. The first wall includes a first wall extension that extends distally beyond the first lumen and is spaced apart from the portion of the septum. The first wall extension defines a concave surface facing the portion of the septum. Alternatively, the septum has a septum extension that extends distally beyond the first lumen and the second lumen. In alternate embodiment, the septum extension defines a first planar surface and an opposing second planar surface.

DUAL LUMEN SUBCLAVIAN CANNULA

CANNULA

CANNULA AND METHOD FOR BIDIRECTIONAL BLOOD FLOW

IMPROVEMENTS IN CATHETERS

SYSTEMS AND METHODS FOR THROMBOLYSIS AND DELIVERY OF AN AGENT

A system for aspirating thrombus and delivering an agent includes an aspiration catheter having a supply lumen having a proximal end, a distal end, and a wall, and an aspiration lumen having a proximal end, an open distal end, and an interior wall surface adjacent the open distal end, and at least one orifice at or adjacent the distal end of the supply lumen, in fluid communication with the aspiration lumen and located proximally of the open distal end of the aspiration lumen, wherein the at least one orifice is configured to create a spray pattern that is caused to impinge on the interior wall surface of the aspiration lumen such that the spray pattern upon impinging on the interior wall surface is caused to transform into at least a substantially distally-oriented flow capable of exiting the open distal end of the aspiration lumen.

RADIOEMBOLIZATION DELIVERY DEVICE

A delivery assembly includes a console including a vial containment region and a vial engagement mechanism extending from the console within the vial containment region. The engagement mechanism is configured to engage a vial assembly. The delivery assembly further includes a sled assembly removably coupled to the console at the vial containment region and a safety shield removably coupled to the console over the vial containment region such that the vial engagement mechanism and the sled assembly are encapsulated within the safety shield when the safety shield is coupled thereto. The sled assembly, the vial assembly, and the safety shield are configured to inhibit radioactive emissions from within the vial containment region.

CATHETER ASSEMBLIES AND METHODS THEREOF

Disclosed herein are catheter assemblies and methods thereof that address various aspects of at least the retrograde tunneling technique. The catheter assemblies include, but are not limited to, catheter assemblies configured for vascular access, catheter assemblies configured for priming, catheter assemblies configured for tunneling, and mechanisms for connecting catheter tubes to their respective catheter assemblies. The methods include, but are not limited to, priming, tunneling, and connecting catheter tubes to their respective catheter assemblies.

DUAL-TIP HEMODIALYSIS CATHETER

A dual tip dialysis catheter has a proximal portion with connected lumens and a distal portion with diverging lumens. The lumens may separate at a split junction and diverge in a scissors like manner to reduce or eliminate a crack or gap adjacent to the split junction, thereby reducing clotting. A dual tip dialysis catheter may have forward openings configured to direct flow in opposite directions.

METHOD AND DEVICE FOR INFUSION OF PHARMACOLOGIC AGENTS AND THROMBUS ASPIRATION IN ARTERY

A catheter device and method for treating an artery with thrombus, the catheter comprising an inflatable member. A carrier catheter has a proximal end and a distal end adapted to be inserted percutaneously into an artery, the carrier catheter having a tubular body adjacent to a rear end of the inflatable member. An inflating tube passes through the tubular body and having an open front end in fluid communication with the inflatable member to inflate same. An infusion tube is adapted to infuse pharmacologic agents, the infusion tube passing through the tubular body and having an open front end extending beyond the inflatable member. An aspiration tube is adapted to aspire the thrombus, the aspiration tube passing through the tubular body and having an open front end between the carrier catheter and the inflatable member.

CANNULA DEVICE, ARTIFICIAL LUNG

Dispositif de canule (1) pour la circulation du sang dans un poumon artificiel caractérisé en ce qu'il comprend : - une première lumière (LA), dite lumière d'aspiration, comprenant au moins un orifice permettant l'aspiration d'un volume de sang; - une seconde lumière (Ll), dite lumière d'injection, comprenant au moins un orifice permettant l'injection d'un volume de sang, caractérisée en ce que la lumière d'injection (Ll) et la lumière d'aspiration (LA) sont maintenues solidaire sur au moins une portion de leur longueur, lesdites lumières étant étanches l'une de l'autre, la lumière d'injection (Ll) comportant un élément déformable (STN) maintenu sur une portion de son extrémité distale, ledit élément déformable (STN) comportant un premier agencement dit de « passage » et un second agencement dit « de maintien », le passage du premier agencement au second agencement s'effectuant par une modification du diamètre dudit élément déformable (STN).

METHODS AND APPARATUS TO EXCHANGE A FLUID OF AN IMPLANTABLE DEVICE

An injector apparatus comprises an elongate structure having one or more openings positionable near a penetrable barrier of an implantable device so as to receive fluid of the implantable device. The apparatus comprises a needle and a sheath extending over at least a portion of the needle. The elongate structure may comprise a distal tip to penetrate tissue and the penetrable barrier, and a distal opening near the tip to release therapeutic fluid into the implantable chamber. In many embodiments the distal tip, the distal opening, and the plurality of openings are separated from a stop that engages a tissue of the patient and limit penetration depth such that the distal opening and the plurality of openings are located along an axis of the implantable device to increase an efficiency of the exchange.

CATHETER DEVICE

A catheter includes an elongate body having first and second chambers extending within the elongate body from a proximal end to an intermediate section, the first chamber having a first opening and the second chamber having a second opening at the intermediate section. The catheter also includes a valve structure that may have first and second barrier elements to open or close the first and second openings, respectively. The first and the second barrier elements may be coupled by a connecting struc-ture moving within an opening in a guide structure. Alternatively, the first and the second barrier elements may be coupled in a U--shaped structure that moves over the guide structure. To permit flushing of the chambers when the first and second openings are closed, the first and second chambers may also be connected by a connecting channel defined by an opening in a wall of the elon-gate body.

CATHETER WITH ARTICULABLE SEPTUM EXTENSION

A catheter includes an elongated tubular body including a first wall and second wall defining first and second lumens, respectively. Each wall extends to a distal end and defines a distal opening. The first and second walls may each include one or more side openings disposed proximal of the distal end. The first and second lumens are separated by a septum. The septum includes a septum extension extending distally from the septum. The septum extension is adapted to articulate relative to the septum in response to fluid flow into and out of the distal openings of the first and second lumens. The septum extension is dimensioned to partially obstruct fluid flow into the catheter through one of the distal openings upon the articulation of the septum extension.

Triple-Lumen Critical Care Catheter

REINFORCED MULTIPLE LUMEN CATHETER

REINFORCED MULTIPLE LUMEN CATHETER

Disclosed is a flexible, reinforced, multiple lumen catheter. This catheter includes an elongated, flexible, tubular element extending about a central axis, and including embedded therein at least one filament extending in a helical path about the central axis. The inner surface of the tubular element defines an interior region . The catheter also includes an elongated divider element having elongated lateral edges. These edges are integral with, and extending from, portions of the inner surface of the tubular element. At least two lumens are defined in the interior region of the tubular element on opposing sides of the divider element. Also disclosed is a method for assembling the flexible, reinforced, multiple lumen catheter.

TAPERED AND REINFORCED CATHETER

A tapered single (50) or multi-lumen catheter (10, 70) having an elongated cylindrical tube (28) for injection and removal of fluid, is provided with generally constant or gradually increasing diameter internal lumen or lumens (16, 18) which are connected to a tip portion (26) which may be a conical tapered tip that smoothly merges with the cylindrical surface of the tube (28) so that insertion trauma and the possibility of kinking are minimized. The catheter body is generally formed of proximal and distal portions wherein the proximal portion preferably includes a portion (30) which increases in external diameter in the proximal direction to provide a strain relief for the intersection of the catheter body (12) and the hub member (20) of the catheter. The portion of the catheter body which increases in diameter may also include one or more lumens therein which similarly increase in diameter to increase the flow of fluid therethrough or which are of constant diameter such that the outer ...

METHODS AND DEVICES FOR OCCLUDING A PATIENT'S ASCENDING AORTA

An aortic occlusion catheter (2) has a blood return lumen (22) for returning oxygenated blood to a patient, and an occluding member (12) for occluding the patient's ascending aorta. The blood return lumen has openings (24, 26) on both sides of the occluding member for infusing oxygenated blood on both sides of the occluding member.

DIALYSIS PROBE.

IMPROVEMENT IN CATHETERS

Controlling Catheter Flow

A catheter assembly includes an elongate member and a balloon. The elongate member defines at least one lumen and an outer surface. The outer surface defines at least one opening in fluid communication with the at least one lumen. The balloon is disposed within the at least one lumen. The balloon is inflatable such that a portion of the balloon expands from the at least lumen through the at least one opening. The expansion of the balloon increases the flow restriction through the at least one opening compared to the flow restriction through the at least one opening when the balloon is in a deflated condition. Methods for using a catheter assembly to remove occlusive material from a catheter are also described.

CATHETER HAS FLOW DOUBLE AND PROCEEDED Of INSERTION

CATHETER

TUBE CONNECTION

FLUID EXCHANGE APPARATUS

KATETER

DUAL-TIP HEMODIALYSIS CATHETER

A dual tip dialysis catheter has a proximal portion with connected lumens and a distal portion with diverging lumens. The lumens may separate at a split junction and diverge in a scissors like manner to reduce or eliminate a crack or gap adjacent to the split junction, thereby reducing clotting. A dual tip dialysis catheter may have forward openings configured to direct flow in opposite directions.

MULTI-LUMEN CATHETER AND TIP CONFIGURATIONS FOR USE THEREWITH

An improved multi-lumen catheter with tip configurations for the simultaneous injection and withdrawal of fluids. The multi-lumen catheter is a hollow cylindrical structure preferably made of polyurethane. It includes an outer catheter, generally used for the removal of fluid from a patient, and an inner catheter, generally used for injection of fluids into a patient. The inner catheter is contained within the outer catheter, extends throughout its length and is bisected by a septum to create two parallel lumens. The shape of each lumen depends on the shape of the septum. For example, if the inner catheter is split in half, the resulting two lumens are D-shaped. The inner catheter is secured by either the outer catheter's tapered distal end, or a bond, wherein the bond secures the inner catheter to the outer catheter. In a preferred embodiment, the inner catheter extends beyond the distal end of the outer catheter to promote a better separation between intake fluid and outflow fluid. The ...

REINFORCED MULTI-LUMEN CATHETER

A reinforced multi-lumen catheter and method of manufacturing the same. An assembly for manufacturing the multi-lumen catheter includes a catheter body substrate including a septum, one or more mandrels, a reinforcing element and one or more sleeves. The septum may have a distal region with a cross-sectional thickness greater than that of a proximal region. The septum can be separately formed. The septum can be split along a length of the distal region. The reinforcing element can be positioned over at least a proximal region of the catheter body substrate.

STATIONARY CENTRAL TUNNEL DIALYSIS CATHETER WITH OPTIONAL SEPARABLE SHEATH

A stationary central tunnel dialysis catheter includes a planar axially elongated sinuous tubular member having a plurality of axially extending lumens formed therein with at least two of said lumens each having at least one aperture for through passage of fluid during dialysis with said apertures being axially displaced from one another along said tubular member.

SPLITTABLE MULTIPLE CATHETER ASSEMBLY

A multiple catheter assembly (100) is provided. The assembly includes a first catheter (110) having a first proximal end region (112), a first distal end region (114), terminating in a first distal tip (116), and an outer surface (120) defining at least a first lumen (122) extending longitudinally therethrough between a first distal (118) and a first proximal opening. The assembly also includes a second catheter (130) having a second proximal end region (132), a second distal end region (134) terminating in a second distal tip (136), and a second outer surface (140) defining at least a second lumen (142) extending longitudinally therethrough between a second distal and a second proximal opening. The first lumen and the second lumens are independent from each other for facilitating simultaneous flow in opposite directions. The outer surfaces of the first and second catheters are releasably joined for allowing the first and second distal tips and first and second proximal end regions to be ...

APPARATUS AND METHOD FOR THE DIALYSIS OF BLOOD

This invention is an improved apparatus and method for the dialysis of blood. The improved apparatus comprises a subcutaneous port, a catheter assembly (105) comprising a connector portion comprising a subcutaneous port element (115), and a catheter portion comprising a catheter element (120). The improved apparatus also comprises a novel percutaneous catheter assembly comprising a catheter portion comprising a catheter element (220), and a connector portion comprising an extra-coporeal connector element (25).

Multiple lumen catheter

A cylindrical elongate body having proximal and distal ends and enclosing two similar longitudinally extending lumens separated by a septum and a further lumen within the septum. A convergently tapered tip extending from the distal end of the body defines part of the further lumen that extends distally beyond the longitudinally extending lumens, while a connector at the proximal end of the body couples plural access tubes in fluid communication with respective individual of the lumens. Openings providing access to each of the longitudinally extending lumens are spaced from one another longitudinally along the body. The further lumen terminates at an opening at the distal end of the tip. The longitudinally extending lumens are blocked immediately distally of the openings.

Dialysis catheter with stiffening member and flow diverting structure

Disclosed is a double lumen continuous flow dialysis catheter having contiguous lumens of different lengths, the shorter lumen acting as a blood intake lumen and the longer as a blood return lumen. The catheter is designed to ease insertion into the body without the use of a tearaway sheath and to minimize recirculation flow from the blood return lumen to the blood intake lumen and/or prevent the blood intake lumen from becoming compressed against a vessel or body wall during dialysis.

Cannula having reverse flow tip

A cannula for conducting fluid to a body includes a cannula body having proximal and distal ends and a lumen extending therebetween. The lumen is adapted to receive the fluid flowing therethrough. The cannula also includes a cannula tip, which is coupled to the distal end of the cannula body. The canula tip includes a side wall having a plurality of fluid outlets formed therein. Each fluid outlet is directed toward the proximal end of the cannula body to reverse the flow of fluid exiting the cannula by an obtuse angle from the original direction of flow.

Self-occluding catheter

A self-occluding catheter includes a body portion for connection to extracorporeal equipment. An elongated tubular extension is provided for insertion into a body cavity. The body portion includes a resiliently biased spool supported therein which is slidable between an open and a closed position for alternately permitting and stopping the flow of blood through the catheter during a given medical procedure. The biasing device for resilient biasing the spool preferably comprises one or more magnets fixed within the body portion which generate a magnetic force for urging the magnetically polarized spool to its closed position.

System for cardiac procedures

A system for accessing a patient's cardiac anatomy which includes an endovascular aortic partitioning device that separates the coronary arteries and the heart from the rest of the patient's arterial system. The endovascular device for partitioning a patient's ascending aorta comprises a flexible shaft having a distal end, a proximal end, and a first inner lumen therebetween with an opening at the distal end. The shaft may have a preshaped distal portion with a curvature generally corresponding to the curvature of the patient's aortic arch. An expandable means, e.g. a balloon, is disposed near the distal end of the shaft proximal to the opening in the first inner lumen for occluding the ascending aorta so as to block substantially all blood flow therethrough for a plurality of cardiac cycles, while the patient is supported by cardiopulmonary bypass. The endovascular aortic partitioning device may be coupled to an arterial bypass cannula for delivering oxygenated blood to the patient's arterial ...

Catheter for prolonged access

A flexible dual lumen catheter is provided for use especially in prolonged access. The catheter is especially used for such access in haemodialysis treatments and includes an elongate body having side-by-side lumens, distal and proximal ends, and one of the lumens being an intake lumen for receiving body fluid and other being a return lumen for leading fluid to the body. Connecting tubes are provided attached to the lumens and a tip is provided adjacent the distal end. The tip defines an intake opening spaced from the distal end of the body to provide access to the intake lumen and the return opening leads from the return lumen at the distal end of the body. The body has two portions, a distal portion adjacent the distal end for engagement within body tissue and a proximal portion extending between the connecting tubes and the distal portion, the distal portion having minimal rigidity for acceptance in the body tissue and the proximal portion having greater rigidity sufficient to minimize ...

Multi-lumen catheters and methods for using same

Multi-lumen balloons for use as or in conjunction with balloon dilation catheters, and methods for making such balloons, are disclosed.

LASER ASSISTED THROMBOLYSIS

The present disclosure relates to methods and systems for removing a vascular obstruction in a subject using a combination ofthrombolytic and laser ablation therapy. Treatment methods include positioning a catheter adjacent to an obstruction within a vessel of a subject. A portion of the obstruction may be ablated by delivering laser energy through the optical fibers to the distal end of the catheter, where the optical fibers are exposed, and circulating a fluid containing one or more thrombolytic agents to a remaining portion of the obstruction for a predetermined amount time. Fluid containing one or more thrombolytic agents capable of dissolving a remaining portion of the obstruction may be circulated through the fluid delivery lumen and removed through the fluid removal lumen.

Splitable tip catheter with bioresorbable adhesive

Splitable-tip catheters are disclosed with bioresorbable adhesive to provide spatial separation of distal tip elements during use. The invention can be particularly useful in hemodialysis applications where it is desirable to separate blood extraction and return lumens. The adhesive facilitates insertion of the distal end of the catheter as an assembly, e.g., into a blood vessel using a single guidewire, while the bioresorbable nature of the adhesive allows the tip elements to separate in vivo.

DEVICE, SYSTEM AND METHODS FOR MEASUREMENT OF PRESSURES IN THE URINARY TRACT

A catheter for measuring pressure in the urinary tract of a patient includes a catheter body having a proximal and distal end. A plurality of lumens is formed in the catheter body, and an adaptor is coupled to the proximal end of the catheter body. The adaptor includes a port for each lumen. A first pressure sensor, typically including a balloon, is fluidically coupled to a first lumen and is configured and positioned to measure pressure in a urethra of the patient. A second pressure sensor, also typically including a balloon, is fluidically coupled to a second lumen and is configured and positioned on the catheter body to measure pressure in a bladder of the patient. An expandable retention member, which may be coupled to a third lumen, is positioned on the catheter body between the first and second expandable pressure sensors so that the catheter body may be retained at a selected location in the urinary tract to properly position the fluid pressure sensors in the bladder and urethra, respectively. 1. (canceled)2. A method for measuring pressure at multiple locations in the urinary tract of a patient to facilitate a treatment for urinary incontinence , the method comprising:advancing a catheter having a first and second pressure sensor into the urinary tract of a patient so as position the first sensor at a first location in a urethra of the patient and the second pressure sensor at a second location in a bladder of the patient;expanding an expandable retention member so as to retain the first sensor at the first location and the second sensor at the second location during exertion of a physiological force on the catheter; andmeasuring pressures at the first location and the second location in response to an external stimulus.3. The method of claim 2 , wherein the pressures at the first and second location are measured substantially simultaneously.4. The method of claim 2 , wherein the pressures at the first and second location are measured sequentially.5. The ...

VA ECMO with Pulmonary Artery Ventilation

A veno-arterial extracorporeal membrane oxygenation system includes a dual lumen drainage cannula configured for withdrawing blood from a patient's vasculature in a manner that provides a perfusion of oxygenated blood with reduced carbon dioxide content while unloading the left ventricle, with two points of access to the patient's vasculature. The dual lumen drainage cannula has a first drainage tube and a second drainage tube co-axially aligned with the first drainage tube. The first and second drainage tubes are fluidly coupled to a connector. A blood pump having a pump inlet is configured for fluidly connecting with the connector, while an oxygenator having an oxygenator inlet is configured for fluidly connecting with a pump outlet. An infusion cannula is configured for fluidly connecting with an oxygenator outlet for infusing oxygenated blood into a patient's bloodstream. 120-. (canceled)21. A veno-arterial extracorporeal membrane oxygenation (VA ECMO) system comprising: a first drainage tube configured for fluid drainage from a first portion of a cardiopulmonary system; and', 'a second drainage tube aligned with the first drainage tube and configured for fluid drainage from a second portion of the cardiopulmonary system;, 'a dual lumen drainage cannula comprisinga blood pump having a pump inlet and a pump outlet, the pump inlet configured for fluidly connecting with the first drainage tube and the second drainage tube; andan oxygenator having an oxygenator inlet and an oxygenator outlet, the oxygenator inlet configured for fluidly connecting with the pump outlet,wherein a distal end of the second drainage tube is fixedly connected to the first drainage tube.22. The VA ECMO system of claim 21 , wherein the distal end of the second drainage tube comprises a tapering section and wherein the second drainage tube is fixedly connected to the first drainage tube along a length of the tapering section.23. The VA ECMO system of claim 21 , wherein the first drainage tube ...

Aspiration Catheter

The invention relates to an aspiration catheter ( 1 ) for the extraction of thrombotic material from blood vessels, with a first ( 3 ) and a second lumen ( 6 ), wherein the first lumen ( 3 ) is distally provided with an aspiration opening ( 5 ) and the second lumen ( 6 ) of smaller cross section than the first lumen ( 3 ) and extending coaxially in the distal region ( 2 ) of the first lumen ( 3 ) being provided with a lateral ( 7 ) as well as distally located opening ( 8 ), said lateral opening ( 7 ) reaching through the wall of the catheter. Within the first lumen ( 3 ) a stabilization wire ( 11 ) is movably arranged which terminates distally of the lateral opening ( 7 ) of the second lumen ( 6 ) but proximally of the aspiration opening ( 5 ) of the first lumen ( 3 ).

Loop-tip catheter

A hemodialysis catheter, including an elongate body with an outer wall enclosing an arterial lumen and a venous lumen, and a method of making same. The catheter includes a first continuous loop and a second continuous loop formed from a distal extension of the outer wall, the first continuous loop beginning at a first side of the distal end of the body to define a first enclosed opening, and the second continuous loop beginning at a second side of the distal end of the body to define a second enclosed opening.

Catheter Assembly Including Triple Lumen Tip

A catheter assembly for use in accessing a vasculature of a patient during renal replacement or other therapies is disclosed. In one embodiment, the catheter assembly includes a catheter body that defines first and second lumens. The catheter body defines a distal tip region that includes a venous lateral opening that is in fluid communication with the first lumen and an arterial lateral opening that is in fluid communication with the second lumen.

Multilumen catheter with pressure resistant lumen and method

The assembly comprises two or more catheter tubes fused together to form a fused catheter bundle. Each tube has at least one lumen extending longitudinally through the catheter from its distal end to its proximal end and at least one of said tubes comprises a pressure resistant lumen. The tubes are fused together by use of heat & pressure generated by heat shrinkable tube slides positioned over a segment of the catheter tubes while mandrels are positioned within each tube lumen. After cooling, the heat shrinkable tube may be removed and the mandrels removed such that and the fused catheter bundle is formed. One or more of the tubes may be of a different hardness, material and/or color. A distal end of the fused catheter bundle can be split free floating, stepped or tapered tipped. A non fused portion may form catheter extension legs.

Catheter tip

Catheters and their uses for vascular access to a patient are described. The catheter comprises an arterial lumen and a venous lumen which run along the shaft of the catheter for most of the length. Near the catheter tip, the two lumens can twist around the longitudinal axis of the catheter. The catheter shaft has two openings, one where the arterial lumen begins the twist and another about 180 degrees into the twist. The catheter shaft also contains an opening for the venous lumen near the nose of the catheter shaft. The orientation of the arterial lumen opening on opposite sides of the shaft eliminates the possibility of side port occlusions since the catheter can't be pressed against a vessel wall that blocks both suction openings simultaneously. And using these openings at each point reduces the chance of occlusion due to blood clots and fibrin sheaths. Other embodiments are described.

Catheter device

A catheter assembly comprising an elongated tubular structure having a distal end and a proximal end; a septum disposed within the interior of the tubular structure so as to define a first lumen and a second lumen, and a valve element disposed at the distal end of the tubular structure and configured to move longitudinally relative to the tubular structure between (i) a closed position in which the distal end of the tubular structure is closed off by the valve element, and (ii) an open position in which the distal end of the tubular structure is not closed off by the valve element; wherein the tubular structure, septum and valve element are configured so as to provide fluid communication between the first and second lumen when the valve element is disposed in its closed position.

Valved Tip Catheters

The present disclosure relates to multiple embodiments of catheters which include valved openings which are normally closed to maintain a lock solution within a catheter during periods of non-use.

Systems, devices and methods for resuscitation

Methods, devices, systems of resuscitating a patient including accessing an arterial vessel positioning a catheter into the arterial vessel advancing the catheter through the arterial vessel to position it below a vessel supplying blood to a heart and a brain expanding an expandable portion of the catheter to prevent blood from flowing past the expanded portion and infusing a substance retrograde into the artery within the arterial section between the heart and the expanded portion of the catheter.

VASCULAR CATHETER

There is provided a catheter assembly wherein at least one of the arterial lumen and the venous lumen are radially displaceable in the transverse plane relative to the longitudinal axis of the catheter body between an insertion position and a drawing position. The maximum radial displacement in the transverse plane, between the radially displaceable arterial and/or venous lumen and the longitudinal axis of the catheter body is greater in the drawing position than in the insertion position. There is also provided a method of inserting and removing the catheter assembly into or from a blood vessel, and a method of treating blood using the catheter assembly. 1. A catheter assembly , said catheter assembly comprising a catheter body defining an arterial lumen and a venous lumen , the catheter body including a distal tip portion including or housing a terminal catheter portion , the arterial lumen including at least one aperture at or towards a distal end of the arterial lumen and in fluid communication with the arterial lumen , and the venous lumen including at least one aperture at or towards a distal end of the venous lumen and in fluid communication with the venous lumen ,wherein at least one of the arterial lumen and the venous lumen are radially displaceable in a transverse plane relative to a longitudinal axis of the catheter body between an insertion position and a drawing position; andwherein a maximum radial displacement in the transverse plane, between the radially displaceable arterial and/or venous lumens and the longitudinal axis of the catheter body is greater in the drawing position than in the insertion position.2. The catheter assembly as claimed in claim 1 , wherein the radially displaceable arterial and/or venous lumens form a helix around the longitudinal axis of the catheter body.3. The catheter assembly as claimed in claim 1 , further comprising:two lumens radially displaceable in the transverse plane relative to the longitudinal axis of the ...

System and Method of Manufacturing Dialysis Catheters

Disclosed is a system and method for splitting dual lumens using hot stamping. The system includes a die assembly having a heated die with a septum that is configured to split the dual lumen to form a split catheter by splitting the septum of the dual lumen. The die can receive a pair of mandrels therethrough, wherein the mandrels are configured to support a dual lumen loaded thereon. The dual lumen and the mandrels are pushed via a block into the die until the dual lumen passes through the septum within the die and two lumens are fully formed. The lumens are cooled with an air blast and the mandrels are removed after the lumens are cooled. 1. A method of manufacturing a split tip catheter assembly having a dual lumen having a proximal end , a distal end , and a septum extending from said proximal end to said distal end , wherein said septum comprises a thickness that is substantially equal to a thickness of said dual lumen , the method comprising the steps of:providing a heated die comprising a circular cross section with a septum located at a midsection thereof;loading said dual lumen on a pair of mandrels;inserting said pair of mandrels loaded with said dual lumen through said heated die;guiding said dual lumen and said pair of mandrels through said heated die until said septum of said heated die separates said dual lumen into two separate lumens.2. The method of claim 1 , wherein said heated die is heated via a radio frequency heating system.3. The method of claim 1 , further comprising the steps of:cooling said lumens via air blast; andremoving said two separate lumens from said pair of mandrels.4. The method of claim 1 , wherein said heated die is heated to 300° F. to 350° F.5. A device for manufacturing a split tip catheter claim 1 , comprising:a die comprising a circular cross section with a septum located at a midsection thereof, thereby defining a first semicircular section and a second semicircular section, wherein said first semicircular section is ...

INFUSION SITE FOR IMPROVED MIXING OF FLUIDS

The present disclosure relates to a blood line () comprising an infusion site () intended to inject into the line a solution comprising: —a first main channel () having a first passage section, —a second main channel () having a second passage section, —means for the formation () of a turbulence area located downstream from the first main channel, located upstream from the second main channel, these formation means comprising a first fluid passage means () defining a reduction () in the passage section and whose smallest passage section is smaller than the first passage section and smaller than the second fluid passage section, —a secondary channel () comprising an inlet () for letting in the solution and an outlet () in fluid communication with the first main channel or the means for the formation of a turbulence area or the second main channel. 1. An extracorporeal circulation blood or plasma treatment device with local anticoagulation including:a filter having a first compartment and a second compartment separated by a semipermeable membrane;an arterial line in fluid communication with the first compartment of the filter;a pre-infusion channel for a local anticoagulation substance in fluid communication with the arterial line;a container of a local anticoagulation substance in fluid communication with the pre-infusion channel; a first line portion in fluid communication with an outlet of the filter,', "a second line portion in fluid communication with a patient's vascular access,", a first main channel in fluid communication with the first line portion and having a first passage section,', 'a second main channel in fluid communication with the second line portion and having a second passage section, and', 'a turbulence area downstream from and in fluid communication with the first main channel, and upstream from and in fluid communication with the second main channel, the turbulence area comprising a first fluid passage defining a reduction in passage section ...

Vascular Access Apparatus

The present invention for vascular access comprises a single-lumen catheter that is configured to be reversibly and coaxially combinable with an inner catheter so as to form a coaxial double-lumen catheter device. The single-lumen catheter in a configuration of the coaxial double-lumen catheter device is configured to take in blood from patient to a hemodialysis machine whereas the inner catheter in the configuration of the coaxial double-lumen catheter device is configured to return the blood from the hemodialysis machine to the patient. 1. A vascular access apparatus for vascular access , comprising:an outer single-lumen catheter, and an inner single-lumen catheter comprising a plurality of longitudinal ridges disposed on an outer surface of a tubular shaft of the inner single-lumen catheter, wherein the inner single-lumen catheter is configured to be reversibly threaded in a tubular space of the outer single-lumen catheter so as to reversibly compartmentalize a single lumen of the outer single-lumen catheter into a coaxial double lumen.2. The vascular access apparatus for vascular access according to claim 1 , wherein the outer single-lumen catheter further comprises:a proximal opening, wherein the proximal opening is provided in a beveled, elliptical configuration having a long radius of the proximal opening longer than 2×a short radius of the proximal opening so as to reduce turbulence of an inflow of blood flowing through the proximal opening and cross-sectional collapse of the proximal opening by the inflow of the blood.3. The vascular access apparatus for vascular access according to claim 1 , wherein the outer single-lumen catheter further comprises:a distal portion having a sealable lock assembly;the sealable lock assembly comprises an external helical thread portion adjoining proximally a seal portion, wherein the sealable lock assembly is configured to sealably accommodate and lock the inner single-lumen catheter in the outer single-lumen catheter.4. The ...

PERCUTANEOUS CATHETER AND METHOD OF MANUFACTURING TUBE FOR PERCUTANEOUS CATHETER

A percutaneous catheter for an extracorporeal blood circulator has a tubular reinforcement body comprised of a plurality of wires braided in a reticulated manner. The braided wires include first wires wound in a first helical direction and second wires wound in a second helical direction crossing the first wires to define regular gap portions. A portion of the first and second wires are deviated from the helical directions to enlarge a selected gap portion into a first opening portion. A resin layer coats the reinforcement body and includes a second opening portion coincident with the first opening portion to form a side hole for fluid communication between an interior lumen and an exterior of the catheter. A continuous reinforcement is provided between longitudinal ends of the tubular reinforcement body including a longitudinal region of the side hole. 1. A percutaneous catheter including a lumen in which blood circulates , the percutaneous catheter comprising:a tubular reinforcement body comprised of a plurality of wires braided in a reticulated manner including first wires wound in a first helical direction and second wires wound in a second helical direction crossing the first wires to define regular gap portions, wherein a portion of the first and second wires are deviated from the helical directions to enlarge a selected gap portion into a first opening portion; anda resin layer coating the reinforcement body and including a second opening portion coincident with the first opening portion;whereby a side hole for fluid communication between the lumen and an exterior of the catheter is formed by the first opening portion and the second opening portion overlapping each other, and whereby a continuous reinforcement is provided between longitudinal ends of the tubular reinforcement body including a longitudinal region of the side hole.2. The percutaneous catheter according to claim 1 , wherein the resin layer is comprised of a first tube at a distal end of the ...

Catheter for Portable Lung Assist Device

The present invention relates to a catheter that minimizes or eliminates the recirculation of oxygenated blood. The catheter of the present invention can be used to drain blood from multiple points in the patient, namely the superior vena cava, right atrium, and the right ventricle, while returning blood to the patient's pulmonary artery. Further, the catheter of the present invention is less likely to be moved or dislodged than catheters currently available in the art, thus making the catheter particularly useful for portable lung assist devices. The present invention also relates to methods for inserting the catheter into the patient and using the catheter with a lung assist device. 1. A catheter comprising:a first tube having a proximal end, a distal end, and a length therebetween, and a lumen within the length of the first tube with at least one opening to the lumen near the distal end;a second tube having a proximal end, a distal end, and a length therebetween, and a lumen within the length of the second tube with at least one opening to the lumen at the distal end; anda preformed curvature near the distal end of the first tube and along the length of the second tube;wherein at least one of the openings of the first tube resides within the curvature, and wherein the distance of the at least one opening in the first tube residing in the curvature relative to the at least one opening in the distal end of the second tube is such that when the catheter is positioned in a subject's heart, the at least one opening in the first tube is positionable in the right ventricle while the at least one opening of the second tube is positionable in the pulmonary artery.2. The catheter of claim 1 , wherein the distal end of the second tube extends 50 to 150 mm past the most distal opening of the first tube.3. The catheter of claim 1 , wherein at least one of the openings of the first tube is positionable in the superior vena cava when the catheter is positioned in the subject's ...

DUAL LUMEN CANNULA

A dual lumen coaxial cannula, assembly includes a first infusion tube having a first elongate body defining a first lumen therethrough and a second drainage tube co-axially aligned with the first infusion tube and having a second elongate body with a second lumen defined by a space between the first infusion tube and second drainage tube. A connector is removably attached to the first infusion tube and the second drainage tube for coupling the dual lumen coaxial cannula to an extracorporeal blood circuit. The first infusion tube and the second drainage tube include a plurality of infusion and drainage apertures, respectively, provided at the distal end and extending through the sidewall of the first infusion tube and the drainage tube, respectively. 1. A dual lumen cannula comprising:a drainage tube having a proximal end, a distal end, and a lumen extending therethrough;an infusion tube coaxially aligned within the lumen of the drainage tube, the infusion tube having a proximal end, a distal end, and a lumen extending therethrough;wherein the infusion tube includes a distal end region extending distally beyond the distal end of the drainage tube to the distal end of the infusion tube;a plurality of drainage apertures extending through a sidewall of the drainage tube proximal of the distal end of the drainage tube; anda connector provided at the proximal end of the infusion tube and the proximal end of the drainage tube, the connector including an inlet portion defining an infusion fluid pathway in fluid communication with the lumen of the infusion tube and an outlet portion defining a drainage fluid pathway in fluid communication with the lumen of the drainage tube;wherein the infusion fluid pathway and the drainage fluid pathway transition from a coaxial arrangement at a distal end of the connector to an axially offset arrangement at a proximal end of the connector.2. The dual lumen cannula of claim 1 , wherein a distal end region of the drainage tube has a tapered ...

Injection cannula, ecmo system

The invention relates to a cannula ( 1 ) for injecting a fluid (F 1 ) into a body cavity ( 5 ), comprising: a main lumen (LP) for the fluid to flow in a first direction; an accessory reperfusion lumen (LA) comprising an outlet ( 20′ ) for discharging the fluid in a second direction; and a device for positioning the cannula in the cavity, the device comprising a stop ( 41 ) which can move along an auxiliary lumen (LX) and be deployed in the cavity in order to lock the cannula in position in the cavity, the outlet ( 30′ ) of the auxiliary lumen being arranged at a distance (d) from the outlet ( 20′ ) of the accessory reperfusion lumen such that when the cannula is locked in position in the cavity, the outlet ( 20′ ) of the accessory reperfusion lumen (LA) is oriented in the cavity such that the collected fluid is discharged in the second direction.

ARTERIAL SHEATH WHICH ALLOWS DISTAL PERFUSION WITHIN A CANNULATED VESSEL

Defining proximal as toward the heart and distal as away from the heart, a sheath includes a proximal opening and multiple fenestrations maintainable in position slightly beyond a site or point of sheath entry into a vessel by way of an anchoring assembly having a set of radially displaceable anchoring elements configured for abutting a superficial vessel wall. The fenestrations and/or anchoring element(s) are arranged obliquely or non-obliquely around peripheral portions of the sheath. The sheath can receive blood from a pumping source at a proximal opening, and channel the blood toward, to, and through the fenestrations. The fenestrations, in combination with the proximal opening, enable the perfusion of blood into the cannulated vessel in a set of distal directions for perfusing a distal tissue or organ. Flow of blood out of fenestrations directs blood distally towards the limb, head, or other distal region, mitigating the risk of or preventing ischemia. 1. A sheath structure configured for cannulating an anatomical vessel , the sheath structure comprising: a distal portion coupled to the distal end and configured for receiving an endovascular or transcatheter device;', 'a valve portion disposed near or at the distal end, the valve portion including at least one valve and configured for preventing backflow of a first portion of the fluid out of the distal end; and', a first lumen therein fluidically coupled to the lumen of the first tube', 'a proximal opening configured for receiving the fluid from a pumping source and channeling the fluid into the first lumen; and', 'a set of fenestrations disposed distal to the proximal opening and fluidically coupled thereto, the set of fenestrations configured for distally outputting or discharging a second portion of the fluid into the vessel., 'a first segment configured to entirely reside within the vessel when the vessel is cannulated, the first segment comprising], 'a first tube having an elongate length, a distal end, a ...

HEMODIALYSIS DEVICE

A hemodialysis device which includes a main tube, a first linking tube, a second linking tube and a third linking tube is disclosed. The main tube includes a central tube, an annular tube, a plurality of dialysis holes, a first end and a second end. The central tube includes a blood passage. The annular tube includes a waste passage which surrounds the central tube. The plurality of dialysis holes are located on the central tube, wherein the blood passage is connected to the waste passage via the plurality of dialysis holes. The first end and the second end are the two opposite ends of the main tube. The first linking tube is connected to the first end and to the central tube. The second linking tube is connected to the second end and to the central tube. 1. A hemodialysis device , comprising: a central tube, comprising at least one blood passage;', 'an annular tube, comprising a waste passage, wherein the waste passage is around the central tube;', 'a plurality of dialysis holes, located on the central tube,', 'wherein the at least one blood passage is connected to the waste passage via the plurality of dialysis holes;', 'a first end; and', 'a second end, wherein the first end and the second end are two opposite ends of the main tube;, 'a main tube, comprisinga first linking tube, connected to the first end and to the central tube;a second linking tube, connected to the second end and to the central tube; anda third linking tube, connected to the second end and to the annular tube.2. The hemodialysis device as claimed in claim 1 , further comprising a first electrode and a second electrode claim 1 , wherein the first electrode is located at the first end and the second electrode is located at the second end; the first electrode and the second electrode form an electric field.3. The hemodialysis device as claimed in claim 2 , further comprising a controlling module claim 2 , wherein the controlling module is electrically connected to the first electrode and the ...

CATHETER

A catheter includes a first lumen and a second lumen in which fluid flows, and a longitudinal end part including a body portion having a constant diameter and a nozzle portion extending from a longitudinal end of the body portion with a gradually reducing diameter. A side surface of the body portion includes cavities fluidly communicating with the first lumen and the second lumen. 1. A catheter , comprising:a first lumen and a second lumen in which fluid flows; anda longitudinal end part comprising a body portion having a constant diameter and a nozzle portion extending from a longitudinal end of the body portion with a gradually reducing diameter,wherein a side surface of the body portion comprises cavities fluidly communicating with the first lumen and the second lumen.2. The catheter of claim 1 , wherein:in a longitudinal end surface of the nozzle portion, an inlet fluidly communicates with the first lumen through which the fluid is introduced, and an outlet fluidly communicates with the second lumen through which the fluid is discharged; andthe catheter further comprises a separation wall extending in an elongated manner from a partition wall partitioning the first lumen and the second lumen at the longitudinal end of the nozzle portion and separates the inlet and the outlet.3. The catheter of claim 1 , wherein an inlet fluidly communicating with the first lumen through which the fluid is introduced claim 1 , and an outlet fluidly communicating with the second lumen through which the fluid is discharged are formed in a shape in which a portion between a longitudinal end of the nozzle portion and a side surface of the nozzle portion has a curved surface in a longitudinal direction.4. The catheter of claim 3 , wherein an inclination of the curved surface increases from a longitudinal end surface of the nozzle portion towards side surfaces of the nozzle portion.5. The catheter of claim 1 , wherein an inlet fluidly communicating with the first lumen through which ...

CENTRAL VENOUS CATHETER ACCESS ASPIRATION SYSTEM

A central venous catheter access aspiration system using a single connection is provided. 1. A device , comprising:a hub connector fluidly connected to a proximate end of each of a first, second and third tube;a first, second, and third one-way valve assembly disposed in each respective tube between each proximate and distal end thereof;the first and third one-way valve assembly being distal directional; andthe second one-way valve assembly being proximate directional.2. The device of claim 1 , further comprising a first claim 1 , second claim 1 , and third syringe fluidly connected to a distal end of first claim 1 , second and third tube respectively.3. The device of claim 2 , wherein each one-way valve assembly is pressure actuable via each operatively associated syringe to selectively interconnect the distal and proximate ends of each respective tube.4. The device of claim 1 , further comprising a fourth tube fluidly connected to the third tube between the distal end of the third tube and the third one-way valve assembly; and a fourth one-way valve assembly disposed in the fourth tube in a distal directional orientation.5. The device of claim 4 , further comprising a vacutainer connection provided on the distal end of the fourth tube.6. A device claim 4 , comprising:a hub connector fluidly connected to a proximate end of each of a first, second and third tube;a first, second, and third syringe fluidly connected to a distal end of first, second and third tube respectively, wherein each one-way valve assembly is actuable by pressure via each operatively associated syringe to selectively interconnect the distal and proximate ends of each respective tube;a first, second, and third one-way valve assembly disposed in each respective tube between each proximate and distal end thereof;a fourth tube fluidly connected to the third tube between the distal end of the third tube and the third one-way valve assembly;a fourth one-way valve assembly disposed in the fourth tube;a ...

Removable catheter cap and applications thereof

Removable catheter cap, and applications thereof, for delivering medical tubes in bodily passages. Removable catheter cap covers flexible medical tube (e.g., catheter) distal tip during delivery in a body lumen. Catheter cap includes: cap body removably connectable to, for capping, catheter distal tip, and transformable into a predefined constituent part freely passable through catheter lumen; and cap releasing member extending through catheter proximal end when catheter cap is connected to the catheter, and manipulatable for transforming cap body into constituent part or/and for withdrawing constituent part from catheter distal tip through catheter lumen. Exemplary applications are: provision of a catheter assembly including a catheter and the removable catheter cap connected thereto; a medical kit including one or more catheters and one or more correspondingly configured removable catheter caps; and a method for delivering a catheter in a blood vessel of a subject, for example, via an over-the-wire technique.

Omnidirectional Deployable Multichannel Neural Electrode System

A neural probe system having a single guide tube that is inserted into neural tissue and from which a number of neural probes can be deployed is described. Each probe is deployable into tissue along a desired trajectory. This is done by supporting the electrode array on a spring tape-type carrier that maintains axial stiffness once the neural probe has deployed out a channel in the guide tube. That way, a target neural tissue is bounded by an increased number of neural probes while minimizing trauma to surrounding body tissue.

Catheter with Tapered Self-Introducing Low-Recirculation Distal Tip

Disclosed is a multi-lumen catheter having a distal end catheter tip configured to improve fluid flow into and out from the catheter tip while reducing undesired recirculation during hemodialysis treatment of a patient. A first lumen and a second lumen each extends from the catheter proximal end to the catheter distal end, the first lumen and the second lumen being parallel to each other. A septum having a first side and a second side separates the first lumen from the second lumen. Some embodiments of the catheter tip include a beveled shape region, having a first lumen orifice, a second lumen orifice, and a septum top surface. Within the beveled shape region, at least a portion of the septum first side and at least a portion of the septum top surface form a first eave over the first lumen and at least a portion of the septum second side and at least a portion of the septum top surface form a second eave over the second lumen.

BALLOON CATHETER AND STENT DELIVERY SYSTEM

A balloon catheter is disclosed, which includes an elongated shaft body, a dilatable balloon in which a distal end portion and a proximal end portion form a dilation chamber inside of the dilatable balloon by being away from each other and being individually bonded to an outer periphery of the shaft body, and a stretch regulation member that connects the outer periphery of the shaft body or an inner periphery of the balloon of the distal end portion of the balloon and the outer periphery of the shaft body or the inner periphery of the balloon of the proximal end portion of the balloon with each other inside the dilation chamber while regulating a stretch occurring between the distal end portion and the proximal end portion of the balloon during dilation of the balloon. 1. A balloon catheter comprising:an elongated shaft body;a dilatable balloon in which a distal end portion and a proximal end portion form a dilation chamber inside of the dilatable balloon by being away from each other and being individually bonded to an outer periphery of the shaft body; anda stretch regulation member that connects the outer periphery of the shaft body or an inner periphery of the balloon of the distal end portion of the balloon and the outer periphery of the shaft body or an inner periphery of the balloon of the proximal end portion of the balloon with each other inside the dilation chamber while regulating a stretch occurring between the distal end portion and the proximal end portion of the balloon during dilation of the balloon.2. The balloon catheter according to claim 1 , an outer tube which has a distal end opening portion; and', 'an inner tube which is inserted into the outer tube to form a balloon dilation lumen between the inner tube and an inner peripheral surface of the outer tube and has a forward extension portion extending forward beyond the distal end opening portion of the outer tube;, 'wherein the shaft body includeswherein the distal end portion of the balloon ...

Pressure Actuated Valve with Improved Biasing Member

A valve for controlling material flow through a catheter, comprises a first flexible member including a first moveable element, wherein, when the first moveable element is in the open position, material may flow past the first flexible member through a first lumen of the catheter and, when the first moveable element is in the closed position, flow through the first lumen is prevented and a first biasing member coupled to the first flexible member for biasing the first moveable member toward the closed position. 1. A valve comprising:a flexible member comprising a first moveable element, a second movable element, and at least one biasing member;wherein the first moveable element and the second moveable element are configured to remain in a closed position when acted upon by a predetermined fluid pressure; andwherein the at least one biasing member is configured to bias the first moveable element and the second moveable element towards the closed position.2. The valve of claim 1 , wherein the predetermined threshold level of fluid pressure is below 44 mmHG.3. The valve of claim 1 , wherein the first moveable element and the second moveable element are configured to move to an open position when acted upon by a flow of fluid above the predetermined fluid pressure.4. The valve of claim 1 , wherein the valve is sized to fit within a flow passage of a catheter hub.5. The valve of claim 4 , wherein the flexible member is substantially an elliptical shape.6. The valve of claim 1 , wherein the valve is configured to allow a flow rate of up to 350 ml/min.7. The valve of claim 1 , wherein the at least one biasing member is integrally formed within the flexible member.8. The valve of claim 7 , wherein the at least one biasing member comprises two biasing members both comprised of a plastic material.9. The valve of claim 7 , wherein the at least one biasing member comprises two biasing members both comprised of a metal material.10. The valve of claim 7 , wherein the at least one ...

SYMMETRICAL TIP ACUTE CATHETER

A medical catheter assembly includes a catheter tip coupled to a distal end of an elongate catheter member and is symmetric about a plane defined by a septum of the elongate catheter member. The catheter tip defines first and second lumens, and the catheter tip defines first and second openings in the distal portion of the catheter tip. Each opening of the catheter tip is defined by a respective side surface of the catheter tip. Each opening is in fluid communication with a respective one of the first and second lumens of the catheter tip and with a respective one of a pair of lumens defined by the elongate catheter member. The distance between upper and lower surfaces of the catheter tip decreases from a distal end of the proximal portion toward a closed distal end of the catheter tip. 115-. (canceled)16. A medical catheter comprising:an elongated body defining a lumen, wherein the elongated body comprises a sidewall defining a side opening in fluid communication with the lumen, the side opening having a proximal end, a distal end, a first side extending from the proximal end to the distal end, and a second side opposing the first side and extending from the proximal end to the distal end, wherein when the elongated body is straight, the first and second sides curve towards each other between the proximal and distal ends.17. The medical catheter of claim 16 , wherein the side opening defines a longitudinal axis extending between the proximal and distal ends and a transverse axis transverse to the longitudinal axis claim 16 , and wherein the side opening is symmetric about the transverse axis.18. The medical catheter of claim 16 , wherein the side opening has a substantially figure-eight shape comprising an arcuate distal portion and an arcuate proximal portion.19. The medical catheter of claim 18 , wherein the arcuate distal portion has a first diameter claim 18 , and the arcuate proximal portion has a second diameter smaller than the first diameter.20. The medical ...

ADVANCED DIALYSIS CATHETER WITH PRESSURE SENSOR

The present disclosure relates to a hemodialysis catheter that can monitor intravascular pressure using a MEMS sensor. The hemodialysis catheter comprises a venous lumen, an atrial lumen, and at least one MEMS system sensor. The hemodialysis catheter also comprises a data acquisition and processing system. The hemodialysis catheter can communicate with a monitor system to display pressure data. 1. A hemodialysis catheter comprising: wherein the first tubular component and second tubular component extend from the proximal end to the distal end of the elongate member;', 'wherein the second tubular component extends a further distance from the proximal end of the elongate member than does the first tubular component;, 'an elongate member having a proximal end, a distal end, a first tubular component and a second tubular component;'}a microelectricalmechanical system sensor disposed proximate a distal end of the second tubular component;a connector hub at the proximal end of the elongate member; andat least one access line affixed to the connector hub in communication with at least a portion of the elongate member.2. The hemodialysis catheter of claim 1 , wherein the first tubular component and the second tubular component comprise two halves of a single extrusion.3. The hemodialysis catheter of claim 1 , wherein the first tubular component comprises at least one lumen for blood flow out of the patient.4. The hemodialysis catheter of claim 1 , wherein second tubular member comprises at least a first lumen and a second lumen claim 1 , wherein the first lumen is designated for blood returning to the patient and the second lumen is designated for the microelectricalmechanical system sensor.5. The hemodialysis catheter of claim 1 , wherein the microelectricalmechanical system sensor comprises a pressure sensor.6. The hemodialysis catheter of claim 1 , further comprising radio opaque markers claim 1 , wherein at least one radio opaque markers designates the location of the ...

Dialysis Catheter

A dialysis catheter is provided. A first lumen extends through a first tubular member from a proximal portion to a distal portion, and a first orifice at the distal portion provides an opening through the first tubular member to the first lumen. The first tubular member further includes an inflation lumen extending longitudinally at least partially through a length of the first tubular member. A balloon is operably connected to an outer surface of the first tubular member proximal to the first opening, is in fluid communication with the inflation lumen. A second tubular member has a proximal portion connected to the outer surface of the first tubular member. A distal portion of the second tubular member is connected to the balloon wall. A second lumen extends through the second tubular member, and a second orifice provides an opening through the second tubular member at the distal portion. 1. A dialysis catheter , the catheter comprising:a first tubular member having a proximal portion, a distal portion, a first lumen extending longitudinally therethrough and an inflation lumen extending at least partially through the first tubular member, the distal portion comprising a first opening connected to the first lumen;a balloon operably connected to an outer surface of the first tubular member proximal to the first opening, the balloon having a balloon wall at least partially surrounding the first tubular member and configured for disrupting occluding material when occluding material is present near the distal portion of the catheter, wherein the inflation lumen is in fluid communication with the balloon for selective inflation and deflation of the balloon; anda second tubular member having a proximal portion connected to the outer surface of the first tubular member and a distal portion connected to the balloon wall, the second tubular member having a second lumen extending therethrough, the distal portion of the second tubular member having a second opening connected ...

Tip Configurations for Multi-Lumen Catheter

Multi-lumen catheters with improved tip configurations, including a triple-lumen catheter which may be useful for apheresis. In one variation, the catheter has three lumens with distal openings angularly spaced apart and staggered axially with respect to one another. In another variation, the catheter has two lumens exiting distally and one centrally positioned lumen exiting proximally. A third variation is a catheter with a single distal opening and two proximal openings. The staggered lumen openings along the axial length of the catheter may decrease recirculation while maximizing flow rates. 1. A multi-lumen catheter , comprising:a first interior wall separating a first lumen from a second lumen;a second interior wall separating the first lumen from a third lumen, the second interior wall and the first interior wall meeting at a central axis of the catheter;a third interior wall separating the second lumen from the third lumen;a first distal opening in fluid communication with the first lumen;a second distal opening in fluid communication with the second lumen; anda third distal opening in fluid communication with the third lumen, the third distal opening positioned proximal of the second distal opening, the second distal opening positioned proximal of the first distal opening.2. The multi-lumen catheter according to claim 1 , wherein the second interior wall and the first interior wall form an angle of approximately 120 degrees.3. The multi-lumen catheter according to claim 1 , wherein each of the first claim 1 , second claim 1 , and third lumens has a constant cross-section from a proximal end of the catheter to a distal end thereof.4. The multi-lumen catheter according to claim 3 , wherein each of the first claim 3 , second claim 3 , and third lumens has a similar cross-sectional shape.5. The multi-lumen catheter according to claim 1 , wherein the first lumen increases in cross-sectional area from the second lumen to a distal end of the catheter.6. The multi- ...

Catheter Assembly

A catheter assembly for use in accessing a vasculature of a patient during renal replacement or other therapies is disclosed. In one embodiment, the catheter assembly includes a catheter body that defines first and second lumens. The catheter body defines a distal tip region that includes a venous lateral opening that is in fluid communication with the first lumen and an arterial lateral opening that is in fluid communication with the second lumen. 1. A catheter assembly , comprising: a terminal catheter portion;', 'a nose portion distal of the terminal catheter portion;', 'a venous lateral opening in fluid communication with the first lumen; and', 'an arterial lateral opening in fluid communication with the second lumen, the venous and arterial lateral openings separated by a septum and positioned un-staggered with respect to one another in the distal tip region, each of the venous and arterial lateral openings having a proximal end defined through a catheter outer wall in the terminal catheter portion, the catheter outer wall tapered toward the septum in the nose portion., 'a catheter body defining a first lumen and a second lumen, the catheter body including a distal tip region, the distal tip region including2. The catheter assembly according to claim 1 , wherein the venous lateral opening and the arterial lateral opening are symmetrically positioned with respect to one another.3. The catheter assembly according to claim 1 , wherein each of the venous lateral opening and the arterial lateral opening defines a partial oval perimeter in the terminal catheter portion.4. The catheter assembly according to claim 1 , further comprising a distal end opening located in the nose portion.5. The catheter assembly according to claim 4 , wherein the distal end opening is in communication with a third lumen defined by the catheter body.6. The catheter assembly according to claim 5 , wherein the distal end opening is centrally positioned with respect to a central axis of the ...

INFUSION LUBRICATED ATHERECTOMY CATHETER

A matter elimination catheter includes a catheter body extending from a catheter proximal portion to a catheter distal portion. The catheter body includes an infusion lumen, an aspiration lumen fluidly isolated from the infusion lumen, and a septum interposed between the infusion and aspiration lumens. A drive shaft is within the infusion lumen and is configured to provide rotation near the catheter distal portion. A guide wire lumen is within the drive shaft, and the infusion lumen, the drive shaft and the guide wire lumen are fluidly separated from the aspiration lumen with the septum. In one example, fluid bearings are formed between one or more of the catheter body and drive shaft or the drive shaft and a guide wire or guide wire liner when supplied with infusion fluid through the infusion lumen. 1. A matter elimination catheter , comprising:a catheter body extending from a catheter proximal portion to a catheter distal portion, the catheter body including an infusion lumen;a drive shaft disposed within the infusion lumen, the drive shaft being configured to provide rotation to at least one rotatable cutter coupled to the drive shaft near the catheter distal portion; anda guide wire liner extending through the drive shaft, the guide wire liner defining a guide wire lumen therein, wherein the drive shaft is rotatable relative to the guide wire liner;wherein pressurized infusion fluid delivered through the infusion lumen and flowing distally between an outer surface of the guide wire liner and an inner surface of the infusion lumen forms one or more fluid bearings between components of the matter elimination catheter;wherein the guide wire liner includes one or more orifices extending through a side wall of the guide wire liner, at least some of the pressurized infusion fluid being deliverable through the infusion lumen passing through the one or more orifices to lubricate a guide wire extending through the guide wire lumen.2. The matter elimination catheter of ...

CATHETER FOR EXTRACORPOREAL BLOOD CIRCULATOR

A catheter for an extracorporeal blood circulator disperses a flow of blood flowing out from a blood feeding hole to reduce the impact of blood collision on a living organ. The catheter includes a blood feeding lumen extending in an axial direction and a blood feeding hole communicating with a distal end of the blood feeding lumen, and a side portion of the blood feeding hole on the proximal side facing the blood feeding lumen is cut out to a bottom portion of the blood feeding hole. 1. A catheter extending in an axial direction for allowing passage of blood , comprising:a tube defining a blood feeding lumen extending in the axial direction to a distal end; anda rigid connector receiving the tube and having a side hole;wherein the tube comprises a blood feeding hole at a distal end of the blood feeding lumen cooperating with the side hole to define an opening with a proximal edge facing the blood feeding lumen that is cut out to a bottom portion of the blood feeding hole so that the proximal edge is substantially perpendicular to the axial direction, and wherein the opening has an outer shape decreasing gradually in width from the proximal edge to the distal end.2. The catheter according to claim 1 , wherein the blood feeding hole further comprises a distal wall formed at the distal side of the blood feeding hole as an extension of a bottom planar wall of the tube so as to be curved into a concave shape toward the distal side in the axial direction.3. The catheter according to claim 1 , further comprising a rib extending between the distal side of the blood feeding hole and the proximal side of the blood feeding hole claim 1 , configured to prevent a biological tissue from being caught by the blood feeding hole.4. The catheter according to claim 3 , wherein the rib is comprised of a rod-like member extending substantially linearly along the axial direction and is formed by a portion of the connector extending across the side hole.5. The catheter according to claim 1 ...

Venous-to-venous loco-regional delivery of a therapeutic agent

The methods, systems, and devices disclosed herein generally involve a venous-to-venous delivery of drugs to a targeted region within a patient. A triple lumen catheter device is disclosed that is particularly suitable for delivery of therapeutic drugs via a closed loop, preventing the circulation of toxic agents throughout the body, thereby creating an isolated treatment zone that maximizes local therapeutic concentrations while preventing agents from escaping to the rest of the body.

Aspiration Thrombectomy Catheter System, And Associated Methods

An aspiration thrombectomy catheter system includes an aspirator and an aspiration catheter for insertion in a blood vessel. The catheter has a shaft with a proximal end for connection with the aspirator and a tapering distal end with a tip for insertion in the vessel. A plurality of aspiration ports are arranged in sets along the tapering distal end, for aspirating thrombus from the vessel. At least one aspiration lumens within the shaft conducts thrombus from the vessel, through the aspiration ports, to the aspirator. Variably sized or shaped ports provide differing aspiration vectors for enhanced thrombus removal. The aspiration thrombectomy catheter additionally provides for uniform drug dispersion at a thrombotic area, alone or in combination with aspiration of the thrombus. In the event of an adverse reaction, drug dosage may be easily reduced by aspirating dispersed drugs back into the catheter.

Catheter

A catheter comprising a dual lumen catheter tube with a molded plastic bolus formed at the distal end of the tube. The tube and bolus assembly which results has arterial and venous ports which overlap each other longitudinally but are oriented on opposite sides of the tube and bolus assembly.

DIALYSIS CATHETER

A dialysis catheter includes an entirely subcutaneous first section, with an exterior interface via penetration of the overlying subcutaneous skin layer. In addition the first section of the dialysis catheter includes a detachable portion that enables insertion via a guidewire instead of a peel-away sheath. The dialysis catheter has a layered design that minimizes risk of infection. 1. A dialysis catheter comprising:a lumen tube comprising an inflow lumen and an outflow lumen;the lumen tube bifurcating into a clampless first limb and a clampless second limb for the inflow lumen and the outflow lumen, respectively;each of the first limb and the second limb comprising a limb port;each limb port configured to secure to a needle guide; andthe needle guide and the limb port configured to house a duckbill valve intermedially between the needle guide and the limb port.2. The dialysis catheter of claim 1 , further comprising an endcap for the needle guide.3. The dialysis catheter of claim 1 , the limb port comprising threads to mate with threads of the needle guide.4. The dialysis catheter of claim 1 , the limb port comprising a first chamber to receive a duckbill of the duckbill valve and an outer edge to mate with a flange of the duckbill valve.5. The dialysis catheter of claim 4 , further comprising:the limb port further comprising a second chamber to mate with a lumen of the lumen tube and an intermedial area between the first chamber and the second chamber.6. A dialysis catheter comprising:a lumen tube bifurcating into a first limb and a second limb;each of the first limb and the second limb comprising a limb port;each limb port configured to secure to a needle guide formed to house a valve; andthe needle guide and the limb port configured to cooperatively retain the valve intermedially between the needle guide and the limb port.7. The dialysis catheter of claim 6 , the needle guide comprising an interior cavity tapered from a wide aperture to a narrow aperture at the ...

CATHETER POSITIONING

A medical catheter includes an elongate member and an insert. The elongate member has proximal and distal end portions and defines a longitudinal axis through the proximal and distal end portions. The elongate member includes a wall at least partially defining a longitudinal lumen and defining a side opening extending radially from an outer surface of the wall to the longitudinal lumen. The insert is at least partially disposed within the side opening and at least partially defines an insert passage in fluid communication with the longitudinal lumen. The elongate member includes a first material defining the side opening and the insert includes a second material different from the first material. 1. A medical catheter comprising:an elongate member including proximal and distal end portions and defining a longitudinal axis extending through the proximal and distal end portions, the elongate member including a wall at least partially defining a first lumen and a second lumen, and the wall defining a first side opening in fluid communication with the first lumen and a second side opening in fluid communication with the second lumen;a first insert at least partially disposed within the first side opening; anda second insert at least partially disposed within the second side opening, the elongate member comprising a first material defining the first and second side openings, and the first and second inserts each comprising a second material different from the first material.2. The medical catheter of claim 1 , wherein the second material is more radiopaque than the first material.3. The medical catheter of claim 1 , wherein the second material has a higher durometer than the first material.4. The medical catheter of claim 1 , wherein the second material comprises at least one of titanium claim 1 , stainless steel claim 1 , polytetrafluoroethylene claim 1 , or polyurethane having a Shore A hardness greater than 95 durometer.5. The medical catheter of claim 1 , wherein the ...

METHOD AND DEVICE FOR INFUSION OF PHARMACOLOGIC AGENTS AND THROMBUS ASPIRATION IN ARTERY

A catheter device and method for treating an artery with thrombus, the catheter comprising an inflatable member. A carrier catheter has a proximal end and a distal end adapted to be inserted percutaneously into an artery, the carrier catheter having a tubular body adjacent to a rear end of the inflatable member. An inflating tube passes through the tubular body and having an open front end in fluid communication with the inflatable member to inflate same. An infusion tube is adapted to infuse pharmacologic agents, the infusion tube passing through the tubular body and having an open front end extending beyond the inflatable member. An aspiration tube is adapted to aspire the thrombus, the aspiration tube passing through the tubular body and having an open front end between the carrier catheter and the inflatable member. 1. A method for treating an artery having a thrombus comprising: percutaneously positioning a catheter with an infusion tube in the artery proximally to the thrombus; passing a tip of the infusion tube through the thrombus; and infusing at least one pharmacologic agent distally to the thrombus via the infusion tube.2. The method according to claim 1 , wherein positioning the catheter comprises positioning an inflatable member of the catheter proximally to the thrombus claim 1 , and further comprising inflating the inflatable member proximally to the thrombus.3. The method according to claim 2 , wherein inflating the inflatable member proximally to the thrombus is performed prior to infusing at least one pharmacologic agent distally to the thrombus.4. The method according to claim 1 , wherein positioning the catheter further comprises positioning an aspiration tube of the catheter proximally to the thrombus claim 1 , the aspiration tube being proximal to the inflatable member.5. The method according to claim 4 , further comprising performing an aspiration via the aspiration tube while deflating the inflatable member to aspire the thrombus.6. The ...

High Flow Rate Dialysis Catheters and Related Methods

High flow rate catheters, and related methods, are useful in dialysis and other procedures. A catheter according to the invention comprises a hub and a generally elongated conduit. The conduit has a substantially continuous and smooth wall. The conduit also defines at least one lumen and has a length extending from a proximal end to a distal end of the conduit. The proximal end is coupled to a hub and the distal end has an opening in communication with the lumen. The conduit has a conical shape which tapers along the length. 1. A catheter , comprising:a hub; anda generally elongated conduit having a substantially continuous and smooth wall, the conduit defining at least one lumen and having a length extending from a proximal end to a distal end of the conduit, the proximal end coupled to the hub and the distal end having an opening in communication with the lumen, the conduit being conical and tapering along the length from the hub to the opening.2. The catheter of wherein the wall has a notch distal to the distal end claim 1 , the notch communicating with at least one of the lumens.3. The catheter of wherein the wall has a thickness claim 1 , the wall having a greater thickness at the proximal end than at the distal end claim 1 , wherein the thickness transitions between the proximal end and the distal end.4. The catheter of wherein at least one of the lumens increases in cross-sectional area from the distal end to the proximal end.5. The catheter of wherein the notch comprises a longitudinal cut in the conduit.6. The catheter of wherein the notch includes a distal appendage.7. The catheter of wherein the notch comprises an opening having an area greater than that of a transverse cross-sectional area of the conduit immediately proximal to the opening.8. The catheter of wherein a surface of the conduit is treated to inhibit association of materials with the conduit.9. The catheter of wherein the surface of the conduit is treated with heparin.10. The catheter of ...

CANNULA DEVICE, ARTIFICIAL LUNG

A cannula device for the circulation of the blood in an artificial lung, includes: an aspiration lumen including at least one orifice permitting the aspiration of a volume of blood; an injection lumen including at least one orifice permitting the injection of a volume of blood, wherein the injection lumen and the aspiration lumen are held rigidly connected over at least a portion of their length, the lumens being sealed in relation to each other, the injection lumen having a deformable element, which is held on a portion of the distal end thereof, the deformable element having a first setting and a second setting, the change from the first setting to the second setting being effected by a modification of the diameter of the deformable element. 1. A cannula device for the circulation of a fluid in an artificial lung , the cannula device comprising:an aspiration lumen comprising at least one orifice configured to aspirate a volume of the fluid,an injection lumen comprising at least one orifice configured to inject a volume of the fluid,wherein the injection lumen and the aspiration lumen are held rigidly connected over at least a portion of their length, said injection and aspiration lumens being sealed in relation to each other, wherein the injection lumen comprises at a distal end thereof a deformable element which is meshed so as to enable a passage of a fluid between its meshes, said deformable element being held over a portion of the distal end thereof, said deformable element comprising a first setting and a second setting, a change from the first setting to the second setting being effected by a modification of a diameter of said deformable element.2. The cannula device according to claim 1 , wherein the deformable element is meshed claim 1 , extensible and retractable.3. The cannula device according to claim 1 , wherein:the first setting of the deformable element is obtained by extension of said deformable element, the diameter of the deformable element then ...

"Dual Lumen Cannula"

A dual lumen coaxial cannula assembly includes a first infusion tube having a first elongate body defining a first lumen therethrough and a second drainage tube co-axially aligned with the first infusion tube and having a second elongate body with a second lumen defined by a space between the first infusion tube and second drainage tube. A connector is removably attached to the first infusion tube and the second drainage tube for coupling the dual lumen coaxial cannula to an extracorporeal blood circuit. The first infusion tube and the second drainage tube include a plurality of infusion and drainage apertures, respectively, provided at the distal end and extending through the sidewall of the first infusion tube and the drainage tube, respectively. 118-. (canceled)19. A dual lumen cannula comprising:a first infusion tube having a first elongate body defining a first lumen therethrough, the first infusion tube having a first proximal end, a first distal end, and a first sidewall extending circumferentially therebetween;a second drainage tube aligned with the first infusion tube and having a second elongate body with a second lumen, the second drainage tube having a second proximal end, a second distal end, and a second sidewall extending circumferentially therebetween;a plurality of infusion apertures extending through the first sidewall of the first infusion tube; anda plurality of drainage apertures extending through the second sidewall of the second drainage tube,wherein a total cross-sectional area of the plurality of infusion apertures is equal to or greater than the cross-sectional area of the first lumen, andwherein the total cross-sectional area of the plurality of drainage apertures is equal to or greater than the cross-sectional area of the second lumen.20. The dual lumen cannula of claim 19 , wherein the second drainage tube is coaxially aligned with the first infusion tube.21. The dual lumen cannula of claim 19 , wherein the plurality of infusion ...

Integrated expandable access for medical device introducer

An integrated sheath assembly for inserting f a medical device such as a percutaneous pump into a vessel can include a first sheath having a first lumen defining a first opening between proximal and distal ends of the first sheath for passage of a portion of the pump and a second sheath having a second lumen defining a second opening between proximal and distal ends of the second sheath. The second lumen is expandable to allow passage of the first sheath containing the portion of the pump. The first sheath fills a space between the second sheath and the portion of the percutaneous pump when the first sheath containing the percutaneous pump is inserted into the second lumen. The first sheath has a first hub, and the second sheath has a second hub. In some embodiments, a single sheath and a movable connector can be integrated on the medical device.

Catheter Assembly Including a Multi-Lumen Configuration

A catheter assembly for use in accessing a vasculature of a patient is disclosed. In one embodiment, the catheter assembly includes a catheter body that includes a flattened oval outer surface and defines first and second lumens. The catheter body defines a distal tip region that includes a venous lateral opening that is in fluid communication with the first lumen and includes a distal-facing portion. The distal tip region further includes an arterial lateral opening that is in fluid communication with the second lumen, includes a distal-facing portion, and is substantially un-staggered with respect to the venous lateral opening. A distal end opening is in fluid communication with a power injectable third lumen. In another embodiment, the first and second lumens each generally include a reniform cross-sectional shape. In yet another embodiment, a dual-lumen catheter includes first and second lumens that each define a modified ellipse cross-sectional shape. 1. A catheter assembly , comprising: the first and second lumens include a modified reniform cross-sectional shape;', 'the third lumen includes a substantially circular cross sectional shape; and', a first lateral opening in fluid communication with the first lumen, the first lateral opening defined by an angled cross cut; and', 'a second lateral opening in fluid communication with the second lumen, the second lateral opening defined by an angled cross cut., 'the catheter tube includes], 'an elongate catheter tube defining first, second, and third lumens, wherein2. The catheter assembly as defined in claim 1 , wherein the first and second lumens are mirror images of one another about a center line of the catheter tube.3. The catheter assembly as defined in claim 1 , wherein a cross section of the outer surface of the catheter tube defines a flattened oval shape.4. The catheter assembly as defined in claim 1 , wherein the third lumen is configured to withstand pressures associated with power injection of a fluid ...

METHOD AND APPARATUS FOR RECTAL ANAESTHESIA

A system and method for delivering a medicament including a catheter configured for implantation in different target tissue sites, extending from a proximal end to a distal end, and having a sidewall which defines an internal lumen. The distal end has one or more apertures in the sidewall for the release of the medicament into the target tissue site; the system also comprises a medicament reservoir fluidly communicable with the internal lumen of each catheter, an adhesive member configured to adhere to the skin of the patient around the exit wound and having an opening therein to allow the catheters to pass through the adhesive member and a retaining member configured to be overlaid on the adhesive member and comprising a guide surface configured to receive a length of the two or more catheters and a plurality of retaining portions to retain the catheters against the guide surface. 1. A system for delivering a medicament to a target tissue site in a patient over a period of time , the system comprising:a catheter configured for implantation in a target tissue site, the catheter extending from a proximal end to a distal end and having a sidewall which defines an internal lumen, said distal end having one or more apertures in the sidewall for the release of the medicament into the target tissue site;a medicament reservoir fluidly communicable with the internal lumen of the catheter;an adhesive member configured to adhere to the skin of the patient around the exit wound and having an opening therein to allow the catheter to pass through the adhesive member; anda retaining member configured to be overlaid on the adhesive member and comprising a guide surface configured to receive a length of the catheter and a plurality of retaining portions to retain the catheters against the guide surface.2. The system of wherein the catheter comprises two or more catheters.3. The system of claim 2 , wherein the two or more catheters have a trocar receiving opening in the sidewall at ...

Dual Lumen Cannula

A dual lumen coaxial cannula assembly includes a first infusion tube having a first elongate body defining a first lumen therethrough and a second drainage tube co-axially aligned with the first infusion tube and having a second elongate body with a second lumen defined by a space between the first infusion tube and second drainage tube. A connector is removably attached to the first infusion tube and the second drainage tube for coupling the dual lumen coaxial cannula to an extracorporeal blood circuit. The first infusion tube and the second drainage tube include a plurality of infusion and drainage apertures, respectively, provided at the distal end and extending through the sidewall of the first infusion tube and the drainage tube, respectively.

Retention drainage catheter

A multi-lumen catheter, for insertion into and draining a body cavity, that mitigates the risk of obstruction of the drainage ports and drainage lumen of the catheter, reduces the detrimental effects caused by the suction forces of the drainage ports on the body cavity being drained, and reduces the risk of infection of the body cavity being drained by decreasing the residual volume of fluid retained in the body cavity being drained. These advantages are achieved by the novel approach of disposing a perforated filter membrane or a membrane having a relatively large entry port(s) between membrane struts over a segmented retention element and also over the drainage port(s) of the drainage lumen of the catheter thereby creating internal interstitial drainage channels and internal interstitial drainage cavities.

APPARATUS AND METHOD FOR SENSOR DEPLOYMENT AND FIXATION

A delivery system for an intracorporeal device includes a sheath defining one or more lumens shaped to receive a delivery catheter or shaft and a guidewire. The system may include a delivery shaft having a distal coupling feature adapted to releasably couple with a proximal coupling feature of the intracorporeal device. The delivery system may further include a hub through which the delivery shaft and guidewire are passed. The delivery shaft may be coupled to a feature, such as a knob, that enables manipulation of the delivery shaft to decouple the distal fixation feature from the proximal fixation feature of the intracorporeal device in order to deploy the intracorporeal device within a patient. 1. An intracorporeal device delivery system , comprising:an intracorporeal device comprising a proximal coupling feature and a device body, wherein the intracorporeal device is a pressure sensor configured to be located and fixed at a deployment site in a vessel;a guidewire;a delivery catheter comprising a distal coupling feature configured to be coupled to the proximal coupling feature;a sheath adapted to receive the guidewire and the delivery catheter; anda lumen provided in at least one of the sheath or delivery catheter, the lumen having a proximal end and a distal end, the distal end proximate to the deployment site, the lumen having a cross-sectional area sufficient and configured to be utilized as a conduit from which pressure measurements are obtained at the deployment site after the distal coupling feature of the delivery catheter is decoupled from the proximal coupling feature of the intracorporeal device and while a distal end of the delivery catheter remains proximate to the deployment site.2. The intracorporeal device delivery system of claim 1 , further comprising a hub coupled to a proximal end of at least one of the sheath or the delivery catheter.3. The intracorporeal device delivery system of claim 1 , wherein the sheath includes the lumen claim 1 , the ...

Integrated Double Cannula for ECMO

The present invention relates to an integrated double cannula for ECMO. The integrated double cannula is configured to be inserted into a blood vessel through skin for ECMO. The integrated double cannula includes a cannula body in which a blood introduction part and a blood supply part are integrally formed inside a single pipe with a partition wall being therebetween, wherein an end of the cannula body is opened through an end hole, another end of the cannula body is opened through an outlet and an inlet arranged side by side and connected respectively to the blood introduction part and the blood supply part, and one or more side holes and one or more discharge holes connected respectively to the blood introduction part and the blood supply part are formed in a lateral portion of the cannula body. 1. A integrated double cannula configured to be inserted into a blood vessel for ECMO , the integrated double cannula comprising a cannula body in which a blood introduction part and a blood supply part are integrally formed inside a single pipe with a partition wall being therebetween , wherein an end of the cannula body is opened through an end hole , another end of the cannula body is opened through an outlet and an inlet arranged side by side and connected respectively to the blood introduction part and the blood supply part , and one or more side holes and one or more discharge holes connected respectively to the blood introduction part and the blood supply part are formed in a lateral portion of the cannula body.2. The integrated double cannula of claim 1 , further comprising a ring-shaped metallic marker around a rear end region of the discharge holes so that an end portion of the cannula body is perceived in a radiographic image.3. The integrated double cannula of claim 1 , wherein a front end portion of the blood supply part has a slope inclined toward the outlet such that blood introduced through the end hole flows smoothly to an ECMO system.4. The integrated ...

Variable length catheter for drug delivery

A method for localized delivery of a therapeutic or diagnostic agent within a vessel is provided. The method provides for adjustability of the length of the treatment area and for reducing of pressure within the treatment area. A catheter system includes an inner elongated element, an outer elongated element positioned coaxially with respect to the inner elongated element, and a blood-release element at a distal end of the inner elongated element. A proximal occlusion element is positioned at the distal end of the outer elongated element, proximal to an outlet port. A distal occlusion element is positioned at a distal end of the inner elongated element. The distal end of the inner elongated element is distal to and movable with respect to the outer elongated element distal end.

Symmetrical tip acute catheter

A medical catheter assembly includes a catheter tip coupled to a distal end of an elongate catheter member and is symmetric about a plane defined by a septum of the elongate catheter member. The catheter tip defines first and second lumens, and the catheter tip defines first and second openings in the distal portion of the catheter tip. Each opening of the catheter tip is defined by a respective side surface of the catheter tip. Each opening is in fluid communication with a respective one of the first and second lumens of the catheter tip and with a respective one of a pair of lumens defined by the elongate catheter member. The distance between upper and lower surfaces of the catheter tip decreases from a distal end of the proximal portion toward a closed distal end of the catheter tip.

OMNIDIRECTIONAL DEPLOYABLE MULTICHANNEL NEURAL ELECTRODE SYSTEM

A neural probe system having a single guide tube that is inserted into neural tissue and from which a number of neural probes can be deployed is described. Each probe is deployable into tissue along a desired trajectory. This is done by supporting the electrode array on a spring tape-type carrier that maintains axial stiffness once the neural probe has deployed out a channel in the guide tube. That way, a target neural tissue is bounded by an increased number of neural probes while minimizing trauma to surrounding body tissue. 1. A neural intervention system , comprising:a) a guide tube comprising a guide tube sidewall extending along a longitudinal axis from a proximal guide tube portion having a proximal guide tube end to a distal guide tube portion having a distal guide tube end, wherein a tube lumen extends from the proximal guide tube end to at least the guide tube portion;b) at least one deployment channel disposed inside the guide tube, the deployment channel comprising a channel sidewall defining a channel lumen extending from a proximal channel open end to a distal channel open end as an open port at the guide tube sidewall, wherein the proximal channel end resides along a first imaginary plane aligned substantially perpendicular to the longitudinal axis;c) at least one neural probe extending from a proximal probe end to a distal probe portion having a distal probe end, wherein the distal probe portion has at least one electrode configured for electrical stimulation of body tissue or recording of biological characteristics, and wherein at least the distal probe end is received in the deployment channel;d) an actuation mechanism having a length extending from a proximal actuation end to a distal actuation portion,e) wherein with the distal probe end received in the deployment lumen and the proximal probe end connected to the distal actuation portion, the proximal actuation portion is movable in a distal direction along the longitudinal axis to cause the at ...

SELF-EXPANDING CANNULA

Disclosed is a self-expanding cannula, systems using such cannulae, and methods of their use. The cannulae may comprise single lumen cannula (“SLC”) configurations and double lumen cannula (“DLC”) configurations, and include at least a first cannula and a self-expanding wire frame attached to the first cannula. Self-expanding wire frame is automatically expandable from a compressed state (providing a reduced cannula diameter as it is moved through a patient's body to the site at which it is to be deployed) to an expanded state (which increases the diameter of the cannula to the diameter intended for its normal use). The expanded wire frame provides radial support to prevent a drainage canal (whether a patient's blood vessel or a portion of the system inserted into the patient's blood vessel) from collapsing as fluid is drained from the patient. 1. A system for fluid handling of a patient's blood , comprising:a first cannula having a distal first cannula end and a proximal first cannula end opposite said distal first cannula end; anda self-expanding wire frame having a distal wire frame end and a proximal wire frame end opposite said distal wire frame end, said proximal wire frame end being attached to said distal first cannula end, said wire frame being automatically expandable to a maximum diameter when positioned to collect blood from a patient's body.2. The system of claim 1 , wherein said self-expanding wire frame is automatically expandable to said maximum diameter in response to warming from a patient's body temperature.3. The system of claim 2 , said wire frame being compressible to a reduced diameter when exposed to a temperature less than a human's normal body temperature claim 2 , said reduced diameter being sufficiently small to allow passage of said wire frame through a portion of the patient's circulatory system.4. The system of claim 1 , said maximum diameter being selected so as to provide radial support to a vessel in which said wire frame is ...

METHOD AND APPARATUS FOR THE DIALYSIS OF BLOOD

Apparatus for use in dialyzing a patient, the apparatus comprising: 1. Apparatus for use in dialyzing a patient , the apparatus comprising: an elongated body having a proximal end and a distal end, wherein the distal end terminates in a substantially planar distal end surface;', 'first and second lumens extending from the proximal end of the elongated body to the distal end of the elongated body, wherein the first and second lumens terminate on the substantially planar distal end surface in first and second mouths, respectively, arranged in side-by-side configuration, and further wherein the first and second lumens are separated by a septum; and', 'first and second longitudinal slots formed in the distal end of the elongated body and communicating with the interiors of the first and second lumens, respectively, the first and second longitudinal slots opening on the substantially planar distal end surface;', 'wherein the first and second longitudinal slots each has a length and a width, relative to the dimensions of the first and second lumens and the rate of blood flow to be passed through the hemodialysis catheter, such that (i) when a given lumen is to be used for a return function, the primary blood flow will exit the mouth of that lumen, and (ii) when a given lumen is to be used for a suction function, the primary blood flow will enter the proximal end of the longitudinal slot associated with that lumen, whereby to minimize undesirable recirculation of dialyzed blood., 'a hemodialysis catheter comprising2. Apparatus according to wherein the septum is substantially planar at the distal end of the elongated body claim 1 , and further wherein the first and second longitudinal slots are set substantially perpendicular to the plane of the septum.3. Apparatus according to wherein the first and second longitudinal slots are sized so that claim 1 , when the first lumen is used as a suction line and the second lumen is used as a return line claim 1 , greater than 85% of ...

Indwelling luminal devices

The invention comprises an indwelling medical device which is capable of delivering a therapeutic agent evenly along the length of the indwelling portion, including the outer wall, of the device.

METHOD AND APPARATUS FOR THE DIALYSIS OF BLOOD

Apparatus for use in dialyzing a patient comprising a hemodialysis catheter comprising an elongated body having a proximal and a distal end, wherein the distal end terminates in a substantially planar distal end surface; first and second lumens extending from the proximal end to the distal end, wherein the lumens terminate on the distal end surface in first and second mouths, arranged in side-by-side configuration, and further wherein the lumens are separated by a septum; and first and second longitudinal slots formed in the distal end of the elongated body and communicating with the interiors of the lumens, the slots opening on the distal end surface; wherein the slots each have a length and a width, relative to the dimensions of the lumens and the rate of blood flow to be passed through the hemodialysis catheter, so as to minimize undesirable recirculation of dialyzed blood. 136-. (canceled)37. A catheter , comprising:a body comprising a body side wall, a body proximal end, and a body distal end; 'a first slot formed in a portion of the body side wall and in fluid communication with the first lumen, the first slot comprising a first slot proximal end and a first slot distal end, the first slot configured such that fluid being discharged from the first lumen primarily exits at and/or near the first slot distal end and fluid being drawn into the first lumen primarily enters at and/or near the first slot proximal end;', 'a first lumen extending from the body proximal end to the body distal end, the first lumen forming a first mouth at the body distal end, the first lumen comprising 'a second slot formed in a portion of the body side wall and in fluid communication with the second lumen, the second slot comprising a second slot proximal end and a second slot distal end, the second slot configured such that fluid being discharged from the first lumen primarily exits at and/or near the second slot distal end and fluid being drawn into the second lumen primarily enters ...

MULTILUMEN CATHETERS AND METHOD OF MANUFACTURING

A multilumen catheter assembly and method of making the catheter assembly is provided that involves providing a plurality of tubes, each tube having a first end, a second end, at least one lumen, and at least one surface, selectively heating at least a portion of the surface of at least a first tube of the plurality of tubes, and contacting the selectively heated portion of the tube with a portion of the surface of a second tube to form a multilumen catheter shaft that is joined together along at least a portion of the length of the catheter shaft. 1. A method of making a multilumen catheter assembly , comprising:providing a first tube and a second tube, both the first tube and the second tube having a distal end, a proximal end, at least one lumen, an inner surface and an outer surface;heating a first portion of the first tube, wherein the heating consists of heating a first inner surface of the first portion of the first tube near the proximal end of the first tube, heating a first portion of the second tube, wherein the heating consists of heating a first inner surface of the first portion of the second tube near the proximal end of the second tube;contacting the selectively heated portion of the inner surface of the first tube with the heated portion of the inner surface of the second tube; andforming the multilumen catheter shaft that is jointed together along at least a portion of the length of the first tube and the second tube, the distal end of the first tube and the distal end of the second tube are not joint together along a selected distance, thereby forming a split tip multilumen catheter.2. The method of claim 1 , wherein the first tube or the second tube of the multilumen catheter having a substantially D-shaped cross-sectional lumen profile.3. The method of claim 1 , wherein the multilumen catheter comprises a third tube having a distal end claim 1 , a proximal end claim 1 , at least one lumen extending longitudinally through at least a portion of ...

Split-Tip Catheter Including Lateral Distal Openings

A split-tip catheter for placement within the vasculature of a patient and for use in hemodialysis or other suitable procedures. In one embodiment, the split-tip catheter includes a catheter body defining a first lumen and a second lumen, and a split distal region extending from a distal end of the catheter body. The split distal region includes an arterial segment defined by an outer wall enclosing an arterial segment lumen, the arterial segment lumen in fluid communication with the catheter body first lumen, and a venous segment defined by an outer wall enclosing a venous segment lumen, the venous segment lumen in fluid communication with the catheter body second lumen, the venous segment outer wall extending from the catheter body distal end to a distal nose portion. The distal nose portion may taper distally from a first outer perimeter to a second outer perimeter smaller than the first outer perimeter. 1. A split-tip catheter , comprising:a catheter body including a first lumen and a second lumen; and an arterial segment defined by an outer wall enclosing an arterial segment lumen, the arterial segment lumen in fluid communication with the catheter body first lumen, the arterial segment outer wall extending from the catheter body distal end to a distal end of the arterial segment, the arterial segment having a first length; and', a venous channel in fluid communication with the venous segment lumen, the venous channel terminating in a venous distal opening in a distal portion of the distal nose portion; and', 'a guidewire channel terminating in a guidewire distal opening in a distal portion of the distal nose portion., 'a venous segment defined by an outer wall enclosing a venous segment lumen, the venous segment lumen in fluid communication with the catheter body second lumen, the venous segment outer wall extending from the catheter body distal end to a distal nose portion, the venous segment having a second length longer than the first length, the distal ...

Catheter device

A catheter includes an elongate body having first and second chambers extending within the elongate body from a proximal end to an intermediate section, the first chamber having a first opening and the second chamber having a second opening at the intermediate section. The catheter also includes a valve structure that may have first and second barrier elements to open or close the first and second openings, respectively. The first and the second barrier elements may be coupled by a connecting structure moving within an opening in a guide structure. Alternatively, the first and the second barrier elements may be coupled in a U-shaped structure that moves over the guide structure. To permit flushing of the chambers when the first and second openings are closed, the first and second chambers may also be connected by a connecting channel defined by an opening in a wall of the elongate body.

Dual-tip hemodialysis catheter

A dual tip dialysis catheter has a proximal portion with connected lumens and a distal portion with diverging lumens. The lumens may separate at a split junction and diverge in a scissors like manner to reduce or eliminate a crack or gap adjacent to the split junction, thereby reducing clotting. A dual tip dialysis catheter may have forward openings configured to direct flow in opposite directions.

APPARATUS AND METHOD FOR SENSOR DEPLOYMENT AND FIXATION

A delivery system for an intracorporeal device includes a sheath defining one or more lumens shaped to receive a delivery catheter or shaft and a guidewire. The system may include a delivery shaft having a distal coupling feature adapted to releasably couple with a proximal coupling feature of the intracorporeal device. The delivery system may further include a hub through which the delivery shaft and guidewire are passed. The delivery shaft may be coupled to a feature, such as a knob, that enables manipulation of the delivery shaft to decouple the distal fixation feature from the proximal fixation feature of the intracorporeal device in order to deploy the intracorporeal device within a patient. 1. An intracorporeal device delivery system comprising:a delivery shaft comprising a distal coupling feature;a sheath adapted to receive a guidewire and defining a delivery shaft lumen, the delivery shaft disposed within the delivery shaft lumen; andan intracorporeal device comprising a proximal coupling feature and a device body, the device body defining an axial envelope extending proximally from the device body;wherein the distal coupling feature is releasably coupled to the proximal coupling feature such that, when coupled, the distal coupling feature is disposed within the axial envelope defined by the device body.2. The intracorporeal device delivery system of claim 1 , wherein the sheath defines a guidewire lumen separate from the delivery shaft lumen claim 1 , the guidewire lumen shaped to receive the guidewire.3. The intracorporeal device delivery system of claim 1 , wherein the distal coupling feature of the delivery shaft is a threaded extension extending distally from the delivery shaft and the proximal coupling feature of the intracorporeal device is a threaded hole shaped to receive the distal coupling feature.4. The intracorporeal device delivery system of further comprising a hub coupled to a proximal end of the delivery shaft.5. The intracorporeal device ...

Localized Therapy Delivery and Local Organ Protection

A system for perfusing a localized site within a body includes a catheter assembly having a venous access line that is adapted to deliver perfusate to the localized site, a venous or arterial drainage line adapted to drain perfusate from the localized site, and an occlusion device adapted to prevent some or substantially all physiological blood flow between the localized site and the systemic circulation of the body during and in the course of perfusing and draining perfusate to and from the localized site. The system may include a blood circuit associated with the catheter assembly to facilitate blood conditioning for use as the perfusate, in the course of a controlled perfusion and/or drainage of untreated, treated, or inactivated treated blood to and from the localized site. A delivery machine may control the blood circuit and catheter assembly in order to both deliver perfusate to, and drain some or all perfusate from, the localized site in a manner that provides perfusate to substantially only the localized site.

Split-Tip Catheter Including Lateral Distal Openings

A subcutaneous tunneling device includes a shaft having a bend, a catheter connector extending from a distal end of the shaft distal of the bend, and a sleeve. The catheter connector can include a body having a gripping portion, and a barbed extension distal of the body configured for insertion into a lumen of a catheter. The sleeve is slidably mounted on the shaft, and has a retracted position exposing the catheter connector to permit a distal end of a catheter to be coupled thereto, and an extended position covering the catheter connector and the distal end of the catheter. 1. A subcutaneous tunneling device , comprisinga shaft including a bend; a body including a gripping portion; and', 'a barbed extension distal of the body configured for insertion into a lumen of a catheter; and, 'a catheter connector extending from a distal end of the shaft distal of the bend, the catheter connector comprisinga sleeve slidably mounted on the shaft, the sleeve having a retracted position exposing the catheter connector to permit a distal end of a catheter to be coupled thereto, and an extended position covering the catheter connector and the distal end of the catheter.2. The subcutaneous tunneling device according to claim 1 , wherein the bend in the shaft is configured to prevent the sleeve from sliding to a proximal end of the shaft.3. The subcutaneous tunneling device according to claim 2 , wherein the sleeve has an outer surface that tapers proximally from a first diameter to a smaller second diameter.4. The subcutaneous tunneling device according to claim 3 , wherein the sleeve has an inner bore that tapers proximally from a third diameter to a smaller fourth diameter to stop a proximal end of the sleeve against the bend in the shaft in the retracted position.5. The subcutaneous tunneling device according to claim 1 , wherein the body includes a stepped proximal end attached to the distal end of the shaft.6. The subcutaneous tunneling device according to claim 5 , wherein ...

Access port and catheter assembly including catheter distal portion stability features

A stabilized catheter tube for insertion into a body of a patient. The catheter tube includes a distal portion that remains stable during fluid infusion into the patient, thus reducing or eliminating whipping of the catheter distal tip. In one embodiment, the catheter tube defines at least one lumen and is formed from a tube material that defines a proximal portion and a distal portion of the catheter tube. The catheter tube is configured such that the arithmetic product of an elastic modulus and an area moment of inertia for the distal portion of the catheter tube is greater relative the arithmetic product of an elastic modulus and an area moment of inertia for the proximal portion of the tube. In one embodiment, the catheter tube is operably attached to an implantable access port and includes an enlarged distal portion relative a proximal portion of the catheter tube.

Convection enhanced delivery device and system

A convection enhanced delivery device comprises a support member and an elongated microcatheter carried by the support member. The microcatheter projects lengthwise away from the support member. The microcatheter includes a catheter lumen extending in a first direction. A fluid conduit carried by the support member. The fluid conduit includes a conduit lumen that extends in a second direction different than the first direction. The conduit lumen is in fluid communication with the catheter lumen. An inlet port and a connecting port are also carried by the support member. The inlet port is in fluid communication with the fluid conduit. The connecting port is separate from the inlet port and is in fluid communication with the fluid conduit. The connecting port is configured to engage an end portion of an external fluid conduit such that the external fluid conduit projects away from the connecting port and from the support member.

Dual Lumen Retrograde Catheter and Hub Attachment

Disclosed is a dual lumen retrograde catheter and hub attachment for dialysis. The catheter includes a venous lumen and an arterial lumen that are attached to a proximal hub having at least one luer extension extending therefrom. The distal end of the catheter is configured to be inserted into the blood vessel and placed into a desired position. The proximal end is tunneled backwards under the skin using a trocar and exited. The proximal end of the catheter can attach to a proximal hub via a pair of cannulas with raised barbs for removably securing proximal ends of the lumens thereon. The lumens are secured in a side-by-side configuration via a compression cap that can be screwed onto the proximal hub to prevent the catheter from detaching from the proximal hub. 1. A retrograde catheter and hub attachment , comprising:a dual lumen catheter comprising a first lumen and a second lumen secured together in a side-by-side configuration;each of said first lumen and said second lumen comprising a distal end and a proximal end;a proximal hub comprising a first end and a second end;at least one luer extension extending from said first end of said proximal hub;each of said proximal end of said first lumen and said proximal end of said second lumen removably connected to said second end of said proximal hub.2. The catheter and hub attachment of claim 1 , further comprising a clamp on said at least one luer.3. The catheter and hub attachment of claim 1 , further comprising:a first cannula and a second cannula, wherein each of said first cannula and said second cannula extends from said second end of said proximal hub, further wherein said first cannula is configured to removably attach to said proximal end of said first lumen, and said second cannula is configured to removably attach to said proximal end of said second lumen.4. The catheter and hub attachment of claim 3 , wherein each of said first cannula and said second cannula comprises raised barbs along the length thereof ...

Split-Tip Catheter Including Lateral Distal Openings

A split-tip catheter for placement within the vasculature of a patient and for use in hemodialysis or other suitable procedures. In one embodiment, the split-tip catheter includes a catheter body defining a first lumen and a second lumen, and a split distal region extending from a distal end of the catheter body. The split distal region includes an arterial segment defined by an outer wall enclosing an arterial segment lumen, the arterial segment lumen in fluid communication with the catheter body first lumen, and a venous segment defined by an outer wall enclosing a venous segment lumen, the venous segment lumen in fluid communication with the catheter body second lumen, the venous segment outer wall extending from the catheter body distal end to a distal nose portion. The distal nose portion may taper distally from a first outer perimeter to a second outer perimeter smaller than the first outer perimeter. 1. A split-tip catheter , comprising:a catheter body including a first lumen and a second lumen; and an arterial segment defined by an outer wall enclosing an arterial segment lumen, the arterial segment lumen in fluid communication with the catheter body first lumen, the arterial segment outer wall extending from the catheter body distal end to a distal end of the arterial segment, the arterial segment having a first length; and', 'a venous segment defined by an outer wall enclosing a venous segment lumen, the venous segment lumen in fluid communication with the catheter body second lumen, the venous segment outer wall extending from the catheter body distal end to a distal nose portion, the venous segment having a second length longer than the first length, the distal nose portion tapering distally from a first outer perimeter to a second outer perimeter smaller than the first outer perimeter, the distal nose portion first outer perimeter greater than an outer perimeter of the venous segment outer wall., 'a split distal region extending from a distal end of the ...

High Flow Rate Dialysis Catheters and Related Methods

High flow rate catheters, and related methods, are useful in dialysis and other procedures. A catheter according to the invention comprises a hub and a generally elongated conduit. The conduit has a substantially continuous and smooth wall. The conduit also defines at least one lumen and has a length extending from a proximal end to a distal end of the conduit. The proximal end is coupled to a hub and the distal end has an opening in communication with the lumen. The conduit has a conical shape which tapers along the length. 120-. (canceled)21. A catheter comprising:a hub; and a cylindrical proximal section; and', 'a middle section, wherein the middle section includes a transition zone;, 'a conduit comprising an outer wall and an internal divider defining at least a first lumen and a second lumen, the conduit further comprisingthe transition zone extending from a first point to a second point, wherein the first point has a first cross-sectional area and the second point has a second cross-sectional area, wherein the first cross-sectional area is larger than the second cross-sectional area; andwherein the outer wall smoothly increases in a distal to proximal direction over the transition zone with a concomitant increase in a cross-sectional area in a distal to proximal direction of each of the first and second lumens over the transition zone; andwherein the cylindrical proximal section is in coupled with the hub.22. The catheter of claim 21 , wherein the conduit further comprises a cylindrical distal section.23. The catheter of claim 22 , wherein the first point is proximal of the second point.24. The catheter of claim 21 , wherein the cylindrical proximal section is in direct contact with the hub.25. The catheter of claim 21 , wherein the internal divider comprises a thickness.26. The catheter of claim 25 , wherein the internal divider thickness is configured to taper in a proximal to distal direction.27. The catheter of claim 25 , wherein the internal divider ...

CATHETER INSERTION APPARATUS

A catheter is provided including a first lumen and a second lumen. A first member is disposed for relative movement within the first lumen and defines a cavity, A second member is disposed for relative movement within the second lumen. The cavity of the first member is configured for disposal of the second member. The catheter may include an elongated tubular body that includes the first lumen and the second lumen. The first member may have a distal portion that extends beyond the distal end of the body. The distal portion may include the cavity. The cavity may be defined by a member lumen. The first and second members may include tubular stylettes. The second member may include a guidewire. 120-. (canceled)21A catheter comprising:an elongated body defining a first lumen and a second lumen, the first lumen terminating proximal to the second lumen;a first member defining a cavity, the first member extending within the first lumen and being slidably movable relative to the first lumen; anda second member received within the second lumen and configured to be slidably movable relative to the second lumen,wherein the cavity of the first member is configured to receive the second member, wherein when the second member is within the cavity of the first member, the first and second members extend beyond a distal end of the elongated body in a tapered configuration.22. The catheter of claim 21 , wherein the first member comprises a distal portion that extends beyond a distal end of the elongated tubular body claim 21 , and wherein the distal portion defines the cavity.23. The catheter of claim 21 , wherein the second member includes a tubular stylette.24. The catheter of claim 21 , wherein the second member includes a guidewire.25. The catheter of claim 21 , wherein the second member includes a guidewire that extends through a tubular stylette of the second member and the cavity claim 21 , the tubular stylette extending beyond a distal end of the elongated tubular body.26. ...

SELF-EXPANDING CANNULA

Disclosed is a self-expanding cannula, systems using such cannulae, and methods of their use. The cannulae may comprise single lumen cannula (SLC) configurations and double lumen cannula (DLC) configurations, and include at least a first cannula and a self-expanding wire frame attached to the first cannula. Self-expanding wire frame is automatically expandable from a compressed state (providing a reduced cannula diameter as it is moved through a patients body to the site at which it is to be deployed) to an expanded state (which increases the diameter of the cannula to the diameter intended for its normal use). The expanded wire frame provides radial support to prevent a drainage canal (whether a patients blood vessel or a portion of the system inserted into the patients blood vessel) from collapsing as fluid is drained from the patient. 1. A system for fluid handling of a patient's blood , comprising:a first cannula having a distal first cannula end and a proximal first cannula end opposite said distal first cannula end; anda self-expanding wire frame having a distal wire frame end and a proximal wire frame end opposite said distal wire frame end, said proximal wire frame end being attached to said distal first cannula end, said wire frame being automatically expandable to a maximum diameter when positioned to collect blood from a patient's body.2. The system of claim 1 , wherein said self-expanding wire frame is automatically expandable to said maximum diameter in response to warming from a patient's body temperature.3. The system of claim 2 , said wire frame being compressible to a reduced diameter when exposed to a temperature less than a human's normal body temperature claim 2 , said reduced diameter being sufficiently small to allow passage of said wire frame through a portion of the patient's circulatory system.4. The system of claim 1 , said maximum diameter being selected so as to provide radial support to a vessel in which said wire frame is positioned ...

DIALYSIS CATHETER

A dialysis catheter including a first portion having a first diameter, an elongated distal portion having a second smaller diameter, and a transition portion The first portion includes first and second independent blood withdrawal lumens extending in the first portion, the first withdrawal lumen terminating in the transition portion in a first terminal opening and the second withdrawal lumen terminating in a second terminal opening, the first and second terminal openings being radially spaced and axially adjacent. A longitudinally extending blood delivery lumen extends in the first portion and terminates in a delivery opening in the distal portion of the catheter, the first and second terminal openings positioned proximally of the delivery opening and each of the first and second terminal openings having a curved wall surrounding a portion of the terminal opening. 1. A medical catheter comprising a first return lumen , a plurality of withdrawal lumens , a first clamping member having a first arm and a second arm , the first arm integral with the second arm , and a plurality of intake extension tubes , each intake extension tube communicating with an intake lumen of the catheter to provide fluid communication with the respective intake lumens , the intake extension tubes positioned in a stacked arrangement within the first clamping member , a first tag connected to the first clamping member to provide information to the user , the first tag having a first and second side wall and a bridge extending between the first and second side walls , and wherein the bridge of the first clamping member extends between the second arm of the first clamping member and the intake extension tubes.2. The catheter of claim 1 , further comprising an independent venous extension tube communicating with the return lumen of the catheter.3. (canceled)4. The catheter of claim 2 , further comprising a second clamping member for clamping the venous extension tube and a second tag connected to ...

Dialysis Catheter

A dialysis catheter is provided. A first lumen extends through a first tubular member from a proximal portion to a distal portion, and a first orifice at the distal portion provides an opening through the first tubular member to the first lumen. The first tubular member further includes an inflation lumen extending longitudinally at least partially through a length of the first tubular member. A balloon is operably connected to an outer surface of the first tubular member proximal to the first opening, is in fluid communication with the inflation lumen. A second tubular member has a proximal portion connected to the outer surface of the first tubular member. A distal portion of the second tubular member is connected to the balloon wall. A second lumen extends through the second tubular member, and a second orifice provides an opening through the second tubular member at the distal portion. 1. A dialysis catheter , the catheter comprising:a first tubular member having a proximal portion, a distal portion, a first lumen extending longitudinally therethrough and an inflation lumen extending at least partially through the first tubular member, the distal portion comprising a first opening connected to the first lumen;a balloon operably connected to an outer surface of the first tubular member proximal to the first opening, the balloon having a balloon wall at least partially surrounding the first tubular member and configured for disrupting occluding material when occluding material is present near the distal portion of the catheter, wherein the inflation lumen is in fluid communication with the balloon for selective inflation and deflation of the balloon; anda second tubular member having a proximal portion connected to the outer surface of the first tubular member and a distal portion connected to the balloon wall, the second tubular member having a second lumen extending therethrough, the distal portion of the second tubular member having a second opening connected ...

SYSTEMS AND METHODS FOR THE CONDITIONING OF CEREBROSPINAL FLUID

Systems and methods for treating biologic fluids are disclosed. Some disclosed embodiments may be used to filter cerebrospinal fluid (CSF) from a human or animal subject, heat CSF to a target temperature, cool CSF to a target temperature, apply light treatment to CSF, separate cells via their dielectric properties, apply spiral and/or centrifugal separation, introduce additives to target particles, and/or apply combinations thereof. The method may include the steps of withdrawing fluid comprising CSF, treating the fluid, and returning a portion of the treated fluid to the subject. During operation of the system, various parameters may be modified, such as flow rate. 1. A system for treating cerebrospinal fluid of a human or animal subject , the system comprising:a catheter assembly including a first fluid pathway and a second fluid pathway;a tangential flow filter coupled to the catheter assembly, the tangential flow filter being in fluid communication with the first fluid pathway and being in fluid communication with the second fluid pathway;a pump configured to withdraw a volume of cerebrospinal fluid from the human or animal subject and transfer the volume of cerebrospinal fluid to the tangential flow filter along the first fluid pathway;wherein the tangential flow filter is configured to filter the volume of cerebrospinal fluid into a permeate and a retentate;wherein the pump is configured to return at least a portion of the permeate to the human or animal subject along the second fluid pathway; anda processing unit configured to increase a rate at which the volume of cerebrospinal fluid passes through the tangential flow filter by diverting a diverted portion of the permeate or retentate back through the tangential flow filter.2. The system of claim 1 , further comprising a sensor disposed adjacent to the tangential flow filter.3. The system of claim 2 , wherein the sensor is configured to measure a characteristic of the volume of cerebrospinal fluid.4. The ...

Multiple Chamber, Expandable Therapeutic Agent Delivery Device

A device having multiple chambers may be configured to expand to contact a substantial section of an interior wall of a body structure or lumen in order to simultaneously exclude blood or other liquid from a target structure while providing for delivery of a therapeutic agent directly to the interior wall. The expandable device may be manufactured from a plurality of flat sheets of material heat sealed to one another to form an inflation chamber and one, two or more delivery chambers. The sheets may also be bonded to an elongate catheter body having inflation and delivery lumens. The excluding of blood flow and delivery of therapeutic agents are completed by the same device. 1. A device for targeted delivery of a therapeutic agent , comprising:an elongated catheter body comprising an inflation lumen and at least one therapeutic agent delivery lumen;a first inner sheet and a second inner sheet, wherein the first inner sheet and the second inner sheet comprise a water impermeable material; and, wherein the first inner sheet comprises a first inner seam and the second inner sheet comprises a second inner seam, wherein the first inner sheet and the second inner sheet are sealed to one another at the first inner seam and the second inner seam, and wherein the first inner sheet and the second inner sheet defining an inflation chamber in a volume between the first and second inner sheets;a first outer sheet and a second outer sheet; wherein the first outer sheet comprises a first outer seam and the second outer sheet comprises a second outer seam, wherein the first outer sheet and the second outer sheet are sealed to one another at the first outer seam and the second outer seam, and wherein at least one of the outer seams incorporate at least one of the first inner seam and the second inner seam;a first delivery chamber comprising a volume between an outer surface of at least one of the first and second inner sheets and an inner surface of at least one of the first and ...

Multi-Lumen Indwelling Catheter

In one aspect, the present disclosure provides a catheter, the catheter with a distal length extending to a distal end, the distal length configured to indwell a cavity of a patient body. The distal length may include a first lumen extending longitudinally through a lengthwise portion of the distal length, where the first lumen may be at least partially defined by a first inner diameter surface of the distal length. The distal length may include a second lumen extending longitudinally through the lengthwise portion of the distal length, where the second lumen may be at least partially defined by a second inner diameter surface of the distal length. A first fenestration may be disposed through a side wall of the first lumen. A proximal length of the catheter may include a proximal lengthwise portion of the first lumen and the second lumen. 120-. (canceled)21. A catheter comprising: a first lumen extending longitudinally through a lengthwise portion of the distal length, the first lumen at least partially defined by a first inner diameter surface of the distal portion; and', 'a second lumen extending longitudinally through the lengthwise portion of the distal length, the second lumen at least partially defined by a second inner diameter surface of the distal portion;, 'a distal portion comprisinga proximal portion comprising the first lumen and the second lumen; anda binal portion between the distal portion and the proximal portion having a single outer wall, wherein the binal portion comprises the first lumen and the second lumen that are both enclosed by a same outer perimeter of the single outer wall;wherein the binal portion has a non-circular cross sectional shape with a relatively narrow portion comprising the first lumen and a relatively wide portion comprising the second lumen.22. The catheter of claim 21 ,wherein the proximal portion includes a bifurcated length having a first tube portion and a second tube portion,wherein the first lumen extends ...

Catheter Assembly Including a Multi-Lumen Configuration

A catheter assembly for use in accessing a vasculature of a patient is disclosed. In one embodiment, the catheter assembly includes a catheter body that includes a flattened oval outer surface and defines first and second lumens. The catheter body defines a distal tip region that includes a venous lateral opening that is in fluid communication with the first lumen and includes a distal-facing portion. The distal tip region further includes an arterial lateral opening that is in fluid communication with the second lumen, includes a distal-facing portion, and is substantially un-staggered with respect to the venous lateral opening. A distal end opening is in fluid communication with a power injectable third lumen. In another embodiment, the first and second lumens each generally include a reniform cross-sectional shape. In yet another embodiment, a dual-lumen catheter includes first and second lumens that each define a modified ellipse cross-sectional shape.

Systems and methods for thrombolysis and delivery of an agent

A system for aspirating thrombus and delivering an agent includes an aspiration catheter having a supply lumen having a proximal end, a distal end, and a wall, and an aspiration lumen having a proximal end, an open distal end, and an interior wall surface adjacent the open distal end, and at least one orifice at or adjacent the distal end of the supply lumen, in fluid communication with the aspiration lumen and located proximally of the open distal end of the aspiration lumen, wherein the at least one orifice is configured to create a spray pattern that is caused to impinge on the interior wall surface of the aspiration lumen such that the spray pattern upon impinging on the interior wall surface is caused to transform into at least a substantially distally-oriented flow capable of exiting the open distal end of the aspiration lumen.

APPARATUS AND METHOD FOR EVERTING CATHETER FOR IUD DELIVERY AND PLACEMENT IN THE UTERINE CAVITY

An everting balloon system is disclosed that can be used for the placement of an IUD within the uterine cavity of a female patient. The everting balloon system with IUD can be used to access a uterine cavity at specific locations in the fundus. A one-handed IUD delivery system for placement with an everting catheter is disclosed. An IUD loading system for placement within an everting catheter is disclosed. The everting catheter with an IUD can simplify the process of IUD placement within the uterine cavity. 1. A system for delivering a device into the reproductive tract of a female comprising:a first catheter having a lumen and a distal lumen port, wherein the first catheter has a retracted configuration and an extended configuration;an everting balloon attached to the first catheter, wherein at least a length of the everting balloon extends past a distal end of the first catheter when the first catheter is in the extended configuration;a second catheter slidably located in the first catheter;an IUD in the second catheter; anda third catheter radially outside of the first catheter.2. The system of claim 1 , wherein the length of the everting balloon that extends past the distal end of the first catheter comprises a check valve when the first catheter is in the extended configuration.3. The system of claim 1 , wherein the second catheter is configured to deliver the IUD.4. The system of claim 1 , wherein the system is configured to release the IUD concurrent with delivering negative pressure within the everting balloon.5. The system of claim 1 , further comprising a pusher in the second catheter.6. The system of claim 5 , wherein the pusher comprises a connection hub.7. The system of claim 5 , wherein the pusher comprises an irrigation mechanism.8. The system of claim 1 , further comprising an irrigant claim 1 , wherein the system is configured to deliver the irrigant through the second catheter concurrent with releasing the IUD from the second catheter.9. The system ...

Solid-Body Catheter Including Lateral Distal Openings

A catheter for vascular insertion, including a catheter body defining a first lumen and a second lumen, and including a distal region. The distal region may include a first distal opening in fluid communication with the first lumen, and a second distal opening in fluid communication with the second lumen. The distal region may also include a first lateral opening defined by the catheter body and in fluid communication with the first lumen, and a second lateral opening defined by the catheter body and in fluid communication with the second lumen. One or both of the first and second lateral openings may be defined by an angle cross-cut through an outer perimeter of the catheter body. 1. A method of hemodialysis , comprising: a catheter body including an outer wall enclosing a first lumen and a second lumen, the first lumen separated from the second lumen by a septum, the first lumen and the second lumen respectively terminating at a distal end of the catheter body in a first distal opening and a second distal opening;', 'a first lateral opening in fluid communication with the first lumen at the distal end of the catheter body, the first lateral opening defined by a skive cut through the outer wall of the catheter body proximal to the first opening; and', 'a second lateral opening in fluid communication with the second lumen at the distal end of the catheter body proximal to the second opening;, 'inserting a catheter into a blood vessel, the catheter comprisingaspirating blood from the blood vessel through the second lumen, the blood entering the second lumen through the second distal opening and the second lateral opening;treating the blood aspirated through the second lumen in a hemodialysis apparatus to form treated blood; andinfusing the treated blood into the blood vessel through the first lumen, the treated blood exiting the first lumen through the first lateral opening and the first distal opening.2. The method according to claim 1 , wherein the skive cut of the ...

CATHETER HAVING AN EXPANDABLE LUMEN AND METHOD OF MANUFACTURE

A single or multiple lumen catheter is disclosed which includes an expandable lumen. The expandable lumen is movable from a collapsed or sealed configuration to an open or expanded configuration. In the open configuration, the expandable lumen is dimensioned to receive a guidewire or stylet or facilitate the introduction of fluids into a patient. 1. A method of manufacturing a multi-lumen catheter , the method comprising the following steps:i) extruding a catheter body having a first lumen and at least one additional lumen, the catheter body being formed of a first material having a first melting temperature;providing a second material on an inner surface of the first lumen, the second material having a melting temperature greater than the first material;directing a fluid through the at least one additional lumen to move the first lumen to a collapsed configuration;melting the first material without melting the second material while the first lumen is in the collapsed configuration; andcooling the first material to allow the first material to set with the first lumen in the collapsed configuration.2. The method according to claim 1 , wherein the at least one additional lumen includes second and third lumens.3. The method according to claim 2 , wherein the step of extruding a catheter body includes providing a septum between the second and third lumens claim 2 , the first lumen extending through the septum.4. A method of manufacturing a multi-lumen catheter claim 2 , the method comprising the following steps:i) extruding a catheter body having a first lumen, a second lumen, and a third lumen positioned between the first and second lumens and extending through a septum of the catheter body, the catheter body being formed of a first material having a first melting temperature;providing a layer of second material on an inner surface of the catheter body defining the first and second lumens, the second material having a melting temperature lower than the first material; ...

METHOD AND APPARATUS FOR THE DIALYSIS OF BLOOD

Apparatus for use in dialyzing a patient comprising a hemodialysis catheter comprising an elongated body having a proximal and a distal end, wherein the distal end terminates in a substantially planar distal end surface; first and second lumens extending from the proximal end to the distal end, wherein the lumens terminate on the distal end surface in first and second mouths, arranged in side-by-side configuration, and further wherein the lumens are separated by a septum; and first and second longitudinal slots formed in the distal end of the elongated body and communicating with the interiors of the lumens, the slots opening on the distal end surface; wherein the slots each have a length and a width, relative to the dimensions of the lumens and the rate of blood flow to be passed through the hemodialysis catheter, so as to minimize undesirable recirculation of dialyzed blood. 136-. (canceled)37. A tunneling tool , comprising:a shaft comprising a proximal end and a distal end, the shaft configured to advance a catheter under a skin of a patient;a plurality of fingers extending from the shaft at or near the proximal end;a sleeve slidably disposed on the shaft.38. The tunneling tool recited in claim 37 , wherein the sleeve is configured to be slid along the shaft and over the plurality of fingers.39. The tunneling tool recited in claim 38 , wherein:each finger of the tunneling tool is configured to be received within at least one slot of a catheter, the catheter comprising at least one septum; andsliding the sleeve over the plurality of fingers causes the plurality of fingers to grip the at least one septum of the catheter.40. The tunneling tool recited in claim 37 , wherein the sleeve comprises a tapered configuration.41. The tunneling tool recited in claim 37 , wherein the distal end comprises a blunt end.42. The tunneling tool recited in claim 37 , wherein the proximal end comprises a frustoconcical section.43. The tunneling tool recited in claim 37 , wherein at ...

INFUSION LUBRICATED ATHERECTOMY CATHETER

A matter elimination catheter includes a catheter body extending from a catheter proximal portion to a catheter distal portion. The catheter body includes an infusion lumen, an aspiration lumen fluidly isolated from the infusion lumen, and a septum interposed between the infusion and aspiration lumens. A drive shaft is within the infusion lumen and is configured to provide rotation near the catheter distal portion. A guide wire lumen is within the drive shaft, and the infusion lumen, the drive shaft and the guide wire lumen are fluidly separated from the aspiration lumen with the septum. In one example, fluid bearings are formed between one or more of the catheter body and drive shaft or the drive shaft and a guide wire or guide wire liner when supplied with infusion fluid through the infusion lumen. 1. A matter elimination catheter , comprising:a catheter body extending from a catheter proximal portion to a catheter distal portion, the catheter body including an infusion lumen;a drive shaft disposed within the infusion lumen, the drive shaft being configured to provide rotation to at least one rotatable cutter coupled to the drive shaft near the catheter distal portion; anda guide wire liner extending through the drive shaft, the guide wire liner defining a guide wire lumen therein, wherein the drive shaft is rotatable relative to the guide wire liner;wherein pressurized infusion fluid delivered through the infusion lumen and flowing distally between an outer surface of the guide wire liner and an inner surface of the infusion lumen forms a first guide wire fluid bearing interposed between an outer surface of the guide wire liner and an inner surface of the at least one rotatable cutter, wherein the first guide wire fluid bearing is generated with pressurized infusion fluid delivered through the infusion lumen and flowing distally between the outer surface of the guide wire liner and an inner surface of at least one rotatable cutter.2. The matter elimination ...

Catheters for Extracorporeal Circulation

Catheter and catheter assemblies for extracorporeal circulation of body fluids, such as blood, are described. A catheter includes a septum that divides an internal lumen into fluidicly isolated drainage and infusion lumens. The infusion lumen extends along only a portion of the axial length of the catheter and terminates at an infusion opening defined by the circumferential wall of the elongate member of the catheter. The drainage lumen extends the full axial length of the catheter and is laterally accessible via first and second sets of drainage openings. 1. A catheter for extracorporeal circulation of body fluids , comprising:an elongate member having a proximal end defining an infusion port and a drainage port, a distal end defining a distal opening, a proximal portion extending from the proximal end toward the distal end, a distal portion extending from the distal end toward the proximal end along a first longitudinal axis, a main body extending between the proximal and distal portions along a second longitudinal axis substantially parallel to the first longitudinal axis, an offset portion extending between the main body and distal portions, and a circumferential wall extending between the proximal and distal ends;the main body having a first outer diameter that is substantially uniform along the axial length of the main body;the circumferential wall having an internal surface defining an internal lumen, defining an infusion opening, and defining a first set of drainage openings on the main body and a second set of drainage openings on the distal portion, the infusion opening and each drainage opening of the first and second sets of drainage openings comprising a passageway through the thickness of the circumferential wall;a septum disposed on and continuous with the internal surface of the circumferential wall, the septum dividing the internal lumen into fluidicly isolated drainage and infusion lumens;the drainage lumen extending between the drainage port and ...

Drug delivery systems and methods

Drug delivery systems and methods are disclosed herein. In some embodiments, a drug delivery system can be configured to deliver a drug to a patient in coordination with a physiological parameter of the patient (e.g., the patient's natural cerebrospinal fluid (CSF) pulsation or the patient's heart or respiration rate). In some embodiments, a drug delivery system can be configured to use a combination of infusion and aspiration to control delivery of a drug to a patient. Catheters, controllers, and other components for use in the above systems are also disclosed, as are various methods of using such systems.

Valved Catheters Including High Flow Rate Catheters

A pressure activated two-way slit valve assembly is designed to be used in combination with, but not limited to, a high flow rate catheter to prevent accidental ingestion of air or loss of blood if the closure cap comes off during non-use of the catheter. In addition, the potential for occlusion of the esthete due to blood clots in the catheter and catheter related infection is substantially reduced. The pressure activated two-way slit valve assembly includes a first end, a second end, a wall defining a dumbbell shaped channel, and a flexible, this disk having a slit and positioned within the pressure activated two-way slit valve assembly to reside within the dumbbell shaped channel. The slit and the dumbbell shaped channel are sized to enable the slit to deform in response to a predetermined pressure differential across the slit to allow fluid to pass therethrough. 1. A method of transferring fluid to or from a patient , the method comprising:accessing an anatomical lumen within the patient; a housing defining a lumen therethrough, the lumen having a longitudinal axis; and', 'a membrane disposed across the lumen, said membrane having a slit therethrough;', 'wherein the lumen has a substantially dumbbell shaped cross-section, the cross-section lying in a plane perpendicular to the longitudinal axis; and, 'placing a catheter with a pressure activated slit valve assembly, the assembly comprisingtransferring fluid to or from the patient through the catheter.2. The method of claim 1 , wherein the slit deforms to permit fluid flow when exposed to a fluid pressure differential of at least a predetermined threshold.3. The method of claim 1 , wherein the dumbbell shaped cross-section is defined by two flanking regions and a central region claim 1 , the central region being of a lesser cross-sectional area than the flanking regions.4. The method of claim 3 , wherein the cross-sectional areas of the flanking regions and central region allow flow rates of up to 500 ml/min.5. ...

DEVICES AND METHODS FOR PROVIDING FOCAL COOLING TO THE BRAIN AND SPINAL CORD

Systems and methods for systems and methods for focal cooling of the brain and spinal cord are disclosed. Some embodiments may be directed to a neuroprotection system that includes a cerebrospinal fluid processing platform. Embodiments may provide rapid and selective spinal cord hypothermia and drainage. Embodiments may be tailored to selective spinal cord cooling, pressure monitoring and automated drainage. Embodiments may enable local hypothermic neuroprotection, limit the stress of systemic cooling, minimize secondary neuronal damage and achieve maximal neuroprotection while at the same time improving workflow as a result of automated drainage. Embodiments may to include a multi-lumen catheter, a drainage collection reservoir bag, a pump to circulate coolant, sensor hardware and controllers to modulate the flow of a heat transfer fluid for cooling to modulate therapeutic hypothermia and re-warming. Certain embodiments may include extracorporeal cooling of cerebrospinal fluid (CSF). Certain embodiments may include circulating heat transfer fluid within a CSF-containing space near the brain or spinal cord using a catheter. Particular methods may be used to determine the length and amount of cooling. 1. A system for providing focal cooling at a treatment site , the system comprising:a catheter designed to access the treatment site;wherein the treatment site includes a CSF-containing space;a treatment unit coupled to the catheter, the treatment unit including a port in fluid communication with the treatment site;wherein the treatment unit is designed to treat a volume of CSF received from the CSF-containing space; andwherein the treatment unit includes a temperature control unit designed to cool the volume of CSF received from the CSF-containing space.2. The system of claim 1 , wherein system is designed to remove the volume of CSF from the CSF-containing space.3. The system of claim 2 , wherein the system is designed to return at least a portion of the cooled CSF to ...

HEMODIALYSIS CATHETER WITH CORRUGATED TIPS

Hemodialysis catheter with corrugated tips. Includes elongated body having first and second distal end regions terminating in tips opened to lumens extending continuously along both elongated body and distal end regions. Each tip includes a tip edge extending from tip tubular wall and surrounding tip opening. Each tip tubular wall has a corrugated configuration with at least two grooves, including outer and inner grooves, merging into the tip edge. Grooves may have same or different lengths, widths, or/and spatial configurations. Distal end regions may be elastic and configured to have non-stressed form when divergent, via diverging angles, from elongated body longitudinal axis, and may be rotationally symmetric relative to the axis. In some embodiments, tip inner wall and hollow outer surfaces merge into a corrugated form having alternating grooves and ridges along distal ends of the tip, that enable the catheter to facilitate active lateral or frontal fluid traversability therethrough. 129.-. (canceled)30. A hemodialysis catheter , comprising an elongated body extending along a longitudinal axis , a first distal end region terminating in a first tip having a first tip edge surrounding a first tip opening and a second distal end region terminating in a second tip having a second tip edge surrounding a second tip opening , said first and second distal end regions separate along , and parallel to , a splitting plane and diverge from said elongated body at equal and directionally opposite angles relative to said longitudinal axis;wherein each of said first and second tips includes at least two grooves merging into one of said respective first or second tip edge, including an inner groove provided along said splitting plane and an outer groove provided remotely to said splitting plane.31. The hemodialysis catheter according to claim 30 , wherein said at least two grooves include a first inner groove extending along a first inner side of said first distal end region ...

INTRAVASCULAR CATHETER WITH POSITIONING MARKERS AND METHOD OF PLACEMENT

An intravascular catheter may include a distal end for insertion and a proximal end. The distal end for insertion may terminate with a tip. It may define at least two openings, of which one is the proximal-most in the distal end. The distal tip may include a first radiopaque marker that is discretely positioned at the proximal-most opening and radiographically distinguishes the proximal-most opening from the rest of the distal end. The distal tip may also include a second radiopaque marker that marks the tip. 1. A dialysis catheter comprising a distal end for insertion and a proximal end , the dialysis catheter comprising:a first lumen having a proximal end configured for delivery or aspiration of blood during a dialysis procedure and a distal end having an end opening;a second lumen having a proximal end configured for delivery or aspiration of blood during a dialysis procedure and a distal end having an end opening;one or more side openings in one or both of the first lumen and second lumen, one side opening of which is the proximal most side opening;a radiopaque marker positioned proximally adjacent to the proximal most side opening.2. The dialysis catheter of claim 1 , wherein the maximum distance between the end openings and the radiopaque marker is between 1.5 and 5 cm. This application is a divisional of U.S. application Ser. No. 12/966,082 filed on Dec. 13, 2010, which application claims the benefit of U.S. provisional application Ser. No. 61/286,127, filed Dec. 14, 2009, and of U.S. provisional application Ser. No. 61/320,044, filed Apr. 1, 2010. The entire disclosures of all the related applications set forth in this section are hereby incorporated by reference in their entireties.There are complications associated with catheter tip position being too low such as perforation of the heart, life threatening arrhythmias and clot formation. Complications related to catheter tip position being too high are also serious and include catheter dysfunction and ...

Connector assemblies

In one aspect, a connector assembly includes a delivery conduit defining a conduit lumen and a securable connector configured to secure the delivery conduit to a medical device hub defining a medical device hub lumen. The conduit lumen includes a constant diameter region along a portion of the delivery conduit and a transition region extending from the delivery conduit to the distal end. A transition region diameter of the transition region gradually increases from the constant diameter region to a distal end of the delivery conduit. The securable connector is coupled to an outer surface of the delivery conduit and is slidable along a portion thereof. The securable connector is configured to receive the medical device hub. The securable connector is secured relative to the delivery conduit so as to fluidically couple the conduit lumen with the medical device hub lumen.

PERCUTANEOUS PULMONARY ARTERY DRAINAGE DEVICE

A multiple lumen device for percutaneous left ventricular unloading during venoarterial extracorporeal membrane oxygenation comprising: an expandable cage, an outer catheter, and an inner catheter, wherein a proximal end of the expandable cage is attached to the outer catheter and a distal end of the expandable cage is attached to the inner catheter, such that when the proximal end of the inner catheter is retracted, the cage moves from a compressed configuration to an expanded configuration is described. Also provided are methods for causing the blood of a subject to flow in a retrograde manner using a multiple lumen device. 1. A multiple lumen device , comprising:(a) an expandable cage having a proximal end and a distal end;(b) an outer catheter comprising a first lumen and having a proximal end and a distal end;(c) an inner catheter comprising a second lumen and a third lumen, and having a proximal end and a distal end, the inner catheter extending through the outer catheter and the expandable cage, and extending beyond the distal end of the expandable cage,wherein the proximal end of the expandable cage is attached to the outer catheter and the distal end of the expandable cage is attached to the inner catheter, such that when the proximal end of the inner catheter is retracted, the cage moves from a compressed configuration to an expanded configuration.2. The device of claim 1 , and further comprising a pressure monitor in fluid communication with the outer catheter for measuring pressure in the right atrium (RA).3. The device of claim 1 , and further comprising an inflatable balloon at the distal tip of and in fluid communication with the second and third lumens of the inner catheter.4. The device of claim 3 , and further comprising a syringe in fluid communication with the second lumen of the inner catheter for inflating the balloon.5. The device of claim 3 , and further comprising a pressure monitor in fluid communication with the third lumen of the inner ...

Access Port And Catheter Assembly Including Catheter Distal Portion Stability Features

A catheter for insertion into a body of a patient, and methods of making and using. The catheter can include a distal portion that remains stable during fluid infusion into the patient, thus reducing or eliminating whipping of the catheter distal tip. The catheter includes at least one lumen and can be configured such that the arithmetic product of an elastic modulus and an area moment of inertia for the distal portion of the catheter is greater than the arithmetic product of an elastic modulus and an area moment of inertia for a proximal portion. The catheter can be attached to an implantable access port that may include features for use as a power injectable access port. 1. A method of manufacturing an implantable vascular access port system , the method comprising:producing an implantable vascular access port; and at least one lumen extending from a proximal end to a distal end;', 'a proximal portion including a first cross sectional lumen area;', 'a distal portion including a second cross sectional lumen area larger than the first cross sectional lumen area, the distal portion designed to prevent whipping when the catheter is disposed in a patient and a fluid exits the at least one lumen; and', 'a taper region interposed between the proximal portion and the distal portion, the taper region having a cross sectional lumen area transitioning from the first cross sectional lumen area to the second cross sectional lumen area., 'forming a catheter designed for coupling to the implantable vascular access port, the catheter comprising2. The method of manufacturing according to claim 1 , wherein the forming step comprises extruding the catheter from a thermoplastic polyurethane material.3. The method of manufacturing according to claim 1 , wherein the forming step comprises forming the distal portion of the catheter to have an area moment of inertia greater than an area moment of inertia of the proximal portion of the catheter.4. The method of manufacturing according to ...

Apparatus and method for everting catheter for iud delivery and placement in the uterine cavity

An everting balloon system is disclosed that can be used for the placement of an IUD within the uterine cavity of a female patient. The everting balloon system with IUD can be used to access a uterine cavity at specific locations in the fundus. A one-handed IUD delivery system for placement with an everting catheter is disclosed. An IUD loading system for placement within an everting catheter is disclosed. The everting catheter with an IUD can simplify the process of IUD placement within the uterine cavity.

VALVED HEMODIALYSIS CATHETER

A dialysis catheter includes an elongate catheter member having an outer wall member defining proximal and distal end regions, and first and second longitudinal lumens. The outer member includes first and second ports in respective fluid communication with the first and second longitudinal lumens. The first opening and the first lumen define an inflow passage. The second opening and the second longitudinal lumen define an outflow passage. A valve is disposed relative to the outer member proximal of the first port. The valve is adapted to move from a closed position to an open position in response to a predetermined vacuum pressure level realized within the first longitudinal lumen to permit flow of blood through the valve and into the first longitudinal lumen. The valve may be adapted to move to the open position in the event of a luminal occlusion. 118.-. (canceled)19. A medical catheter assembly comprising:an elongated catheter member defining a longitudinal axis and at least one lumen for passage of fluid, the elongated catheter member having proximal and distal end regions, the distal end region having an open end; anda valve disposed adjacent the distal end region of the catheter member and, in response to a predetermined pressure level within the at least one lumen when the open end is at least partially occluded, a portion of the valve is movable in a distal direction to permit flow of the fluid through the valve and into the at least one lumen.20. The medical catheter assembly of claim 19 , wherein the elongated catheter member includes an outer catheter wall and the valve is defined within the outer catheter wall.21. The medical catheter assembly of claim 20 , wherein the valve is movable about a living hinge between the valve and the outer catheter wall.22. The medical catheter assembly of claim 19 , wherein the elongated catheter member includes an outer catheter wall and the valve defines an area of reduced thickness relative to the catheter wall.23. The ...

Localized Therapy Delivery and Local Organ Protection

A system for perfusing a localized site within a body includes a catheter assembly having a venous access line that is adapted to deliver perfusate to the localized site, a venous or arterial drainage line adapted to drain perfusate from the localized site, and an occlusion device adapted to prevent some or substantially all physiological blood flow between the localized site and the systemic circulation of the body during and in the course of perfusing and draining perfusate to and from the localized site. The system may include a blood circuit associated with the catheter assembly to facilitate blood conditioning for use as the perfusate, in the course of a controlled perfusion and/or drainage of untreated, treated, or inactivated treated blood to and from the localized site. A delivery machine may control the blood circuit and catheter assembly in order to both deliver perfusate to, and drain some or all perfusate from, the localized site in a manner that provides perfusate to substantially only the localized site.

MULTI-LUMEN CATHETER

The invention provides a catheter for placement within a vessel of a patient. The catheter comprises an elongated catheter body, a septum extending longitudinally through the interior of the catheter body from the dividing the interior of the catheter body into a first lumen and a second lumen. Each lumen has curved or angled internal walls at the distal end of the catheter that terminate at ports located on opposing sides of the catheter body. The invention also provides a method for exchanging fluids in a patient comprising the step of positioning the catheter of the present invention in communication with a fluid-containing vessel of a patient. The method is particularly well-suited for hemodialysis, plasmapheresis, and other therapies which require removal and return of blood 1. A catheter for placement within a vessel of a patient comprising:an elongated catheter body having a proximal end and a distal end; anda septum extending longitudinally through at least a portion of the interior of the catheter body, thereby dividing the interior of the catheter body into a first lumen and a second lumen;wherein each of the first lumen and the second lumen comprise internal walls at the distal end of the catheter that terminate at ports located on opposing sides of the catheter body and define a substantially helical shape such that fluid flowing through the ports is deflected, and wherein the septum does not extend beyond the ports.2. The catheter of claim 1 , wherein the internal walls of the lumina are curved.3. The catheter of claim 1 , wherein the internal walls of the distal ends of the lumina are angled.4. The catheter of claim 1 , wherein a distal end of the first lumen extends beyond a distal end of the second lumen.5. The catheter of claim 4 , wherein the distal end of the first lumen extends from about 2 cm to about 3 cm beyond the distal end of the second lumen.6. The catheter of claim 1 , wherein the first lumen and the second lumen are split apart.7. The ...

Hemodialysis Device

A hemodialysis device is described herein. An exemplary hemodialysis device includes an import tube, a dialysis tube, and an export tube. The dialysis tube includes an inner dialysis tube, a dialysis membrane and an outer dialysis tube. The inner dialysis tube is within the dialysis membrane, which is within the outer dialysis tube. An inlet and an outlet of the inner tube are disposed at a first end of the outer dialysis tube. The inlet of the inner dialysis tube is coupled to the import tube and the outlet of the inner dialysis tube is coupled to the export tube. The dialysis tube is inserted into an artery of a patient, and thereby performs hemodialysis within the body. Since the hemodialysis in performed within the artery instead of drawing blood out of the body, the hemodialysis device will minimally affect blood pressure, which is more economic and safe. 1. A hemodialysis device comprising:an import tube having an inlet and an outlet;an export tube having an inlet and an outlet; an outer dialysis tube having a first end, a second end, and an intermediate cavity;', 'an inner dialysis tube disposed within the intermediate cavity, the inner dialysis tube having an inlet, an outlet, and an interior cavity, the inlet and the outlet disposed at the first end of the outer dialysis tube; and', 'a dialysis membrane, the interior cavity being in partial fluid communication with the intermediate cavity across the dialysis membrane; and, 'a dialysis tube comprisinga first lock coupling the outlet of the import tube to the inlet of the inner dialysis tube, and coupling the inlet of the export tube to the outlet of the inner dialysis tube.2. The hemodialysis device recited in claim 1 , further comprising:a dialysate tank storing a dialysate solution, the dialysate tank coupled to the inlet of the import tube and the outlet of the export tube;a pump that drives the dialysate solution through the import tube, the dialysis tube, and the export tube; anda speed regulating valve ...

INFUSION LUBRICATED ATHERECTOMY CATHETER

A matter elimination catheter includes a catheter body extending from a catheter proximal portion to a catheter distal portion. The catheter body includes an infusion lumen, an aspiration lumen fluidly isolated from the infusion lumen, and a septum interposed between the infusion and aspiration lumens. A drive shaft is within the infusion lumen and is configured to provide rotation near the catheter distal portion. A guide wire lumen is within the drive shaft, and the infusion lumen, the drive shaft and the guide wire lumen are fluidly separated from the aspiration lumen with the septum. In one example, fluid bearings are formed between one or more of the catheter body and drive shaft or the drive shaft and a guide wire or guide wire liner when supplied with infusion fluid through the infusion lumen. 1. A matter elimination catheter comprising: an infusion lumen,', 'an aspiration lumen fluidly isolated from the infusion lumen, and', 'a septum of the catheter body interposed between the infusion and aspiration lumens;, 'a catheter body extending from a catheter proximal portion to a catheter distal portion, the catheter body includinga drive shaft within the infusion lumen, the drive shaft configured to provide rotation near the catheter distal portion;a guide wire lumen within the drive shaft; andwherein the infusion lumen, the drive shaft and the guide wire lumen are fluidly separated from the aspiration lumen with the septum.2. The matter elimination catheter of claim 1 , wherein the septum spans the catheter body from a first portion of a catheter body side wall to a second portion of the catheter body side wall.3. The matter elimination catheter of claim 1 , wherein the catheter further comprises:an outflow port near the catheter distal portion in communication with the infusion lumen near the catheter distal portion, andan inflow port near the catheter distal portion in communication with the aspiration lumen near the catheter distal portion.4. The matter ...

Split-Tip Catheter Including Lateral Distal Openings

A split-tip catheter for placement within the vasculature of a patient and for use in hemodialysis or other suitable procedures, and methods of use. The split-tip catheter can include a catheter body defining a first lumen and a second lumen, and a split distal region extending from a distal end of the catheter body. The split distal region can include an arterial segment defined by an outer wall enclosing an arterial segment lumen, the arterial segment lumen in fluid communication with the catheter body first lumen, and a venous segment defined by an outer wall enclosing a venous segment lumen, the venous segment lumen in fluid communication with the catheter body second lumen, the venous segment outer wall extending from the catheter body distal end to a distal nose portion. The distal nose portion can taper from a first outer perimeter to a second smaller outer perimeter. 1. A method of hemodialysis , comprising: a catheter body including a first lumen and a second lumen; and', an arterial segment defined by an outer wall enclosing an arterial segment lumen, the arterial segment lumen in fluid communication with the catheter body first lumen, the arterial segment outer wall extending from the catheter body distal end to a distal end of the arterial segment, the arterial segment having a first length; and', a venous channel in fluid communication with the venous segment lumen, the venous channel terminating in a venous distal opening; and', 'a guidewire channel terminating in a guidewire distal opening discrete and spaced from the venous distal opening, wherein a longitudinal axis of the guidewire channel is aligned with a longitudinal axis of the arterial segment lumen when the split distal region is in a delivery configuration;, 'a venous segment defined by an outer wall enclosing a venous segment lumen, the venous segment lumen in fluid communication with the catheter body second lumen, the venous segment outer wall extending from the catheter body distal end ...

Recirculation Minimizing Catheter

A hemodialysis split-tip catheter comprises an elongated portion, a proximal end and a distal end defining a longitudinal axis. The proximal end attaches to a hub with suture wings assembly, which in turn connected to extension tubings. The distal end has two distal tip segments splitted from each other. The first distal tip segment has a concave shape with respect to the longitudinal axis and the second distal tip segment has an approximately J-shape with respect to first distal tip segment. Diameter of concave shape of first distal tip segment is larger than diameter of J-shape of second distal tip segment to facilitate backward bend of second distal tip segment with respect to first distal tip segment after a catheter insertion inside a blood vessel to face a blood flow direction. 1. A hemodialysis split-tip catheter comprising:an elongated portion, a proximal end and a distal end defining a longitudinal axis;an elongated portion comprising a catheter body; 'a hub with suture wing assembly, and extension tubings fluidly connect catheter lumens to a blood treatment unit; and', 'a proximal end comprising a first distal tip segment has a concave shape with respect to the longitudinal axis, a straight tip, a side hole and a distal tip opening; and', 'a second distal tip segment has an approximately J-shape with respect to the first distal tip segment and a distal tip opening., 'a distal end comprising two splitted distal tip segments comprising2. The hemodialysis split-tip catheter of wherein the first distal tip segment has a concave shape with respect to the longitudinal axis.3. The hemodialysis split-tip catheter of wherein the concave shape of the first distal tip segment bends outwardly and pushes a blood vessel wall outwardly.4. The hemodialysis split-tip catheter of wherein the first distal tip segment has a diameter of concave curvature larger than a diameter of the second distal tip segment.5. The hemodialysis split-tip catheter of wherein the second distal ...