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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 1214. Отображено 100.
12-04-2012 дата публикации

Catheter Assembly Including Triple Lumen Tip

Номер: US20120089070A1
Автор: Ryan T. Moehle, Scott W. Sanders, William R. Barron
Принадлежит: CR Bard Inc

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.

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Номер записи: 1
17-05-2012 дата публикации

Multilumen catheter with pressure resistant lumen and method

Номер: US20120123259A1
Автор: M. Samy Ahmed Hamboly
Принадлежит: Hamboly M Samy Ahmed

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.

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Номер записи: 2
04-04-2013 дата публикации

Plasma-treated dialysis catheter cuff

Номер: US20130085451A1
Автор: Min-Shyan Sheu
Принадлежит: TYCO HEALTHCARE GROUP LP

A catheter is disclosed. The catheter includes an elongated tubular body defining a longitudinal axis and extending to a distal end thereof, the tubular body having at least one lumen and a cuff disposed around the tubular body configured to contact tissue, the cuff formed from a plasma-treated material having enhanced tissue ingrowth properties.

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Номер записи: 3
31-10-2013 дата публикации

Catheter device

Номер: US20130289527A1
Автор: Adrian C. Ravenscroft
Принадлежит: PHASE ONE MEDICAL LLC

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.

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Номер записи: 4
14-11-2013 дата публикации

Vascular Access Catheter Anchor and Access Valve

Номер: US20130303986A1
Автор: Richard V. Penalosa, JR.
Принадлежит: Individual

Provided is a venous catheter having an anchoring system and access valve for attachment to intravenous lumen tubing. The anchor includes a sloping base plate that is attached to the skin of a user for providing stability and immobility to the tubing. The sloping base plate elevates the tubing away from the skin in order to prevent catheter-related bloodstream infections. The plate can include an extension and cover for securing the tubing into position, and a shelf that allows the plate to extend beyond the extension to prevent skin contact with the tubing. The access valve is a T-shaped adapter for connecting the tubing to a dialysis machine tubing, and includes a flushing branch that eliminates the need to disconnect the tubing from the dialysis machine when flushing the dialysis vascular access. The access valve can be attached below the extension, snapped into the extension, or molded into the extension.

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Номер записи: 5
09-01-2014 дата публикации

Valved Tip Catheters

Номер: US20140012209A1
Автор: Michael Sansoucy
Принадлежит: TYCO HEALTHCARE GROUP LP

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.

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Номер записи: 6
04-01-2018 дата публикации

Capacitance-Based Patient Line Blockage Detection

Номер: US20180001009A1
Автор: Crawford William Scott, Ohline Robert Matthew
Принадлежит:

A dialysis machine (e.g., a peritoneal dialysis (PD) machine) can include a pressure sensor mounted at a proximal end of a patient line made of a distensible material that provides PD solution to a patient through a catheter. During treatment, an occlusion can occur at different locations in the patient line and/or the catheter. When an incremental volume of additional solution is provided to the patient line while the occlusion is present, a change in pressure results. The change in pressure depends on the dimensions and the distensibility of the non-occluded portion of the patient line. If the change in pressure, the incremental volume, the properties related to the distensibility of the patient line, and some of the dimensions of the patient line are known, the location of the occlusion can be inferred. The occlusion type can be inferred based on the determined location. 1. A method comprising:measuring a first pressure of fluid in a first portion of a distensible medical tube connected to a medical device, wherein an occlusion is present in the medical tube at a location that defines a boundary between the first portion and a second portion of the medical tube;providing or withdrawing a volume of fluid to or from the first portion of the medical tube;measuring a second pressure of the fluid in the first portion of the medical tube; anddetermining a length of the first portion of the medical tube based on a difference between the second pressure and the first pressure.2. The method of claim 1 , wherein the medical device comprises a dialysis machine.3. The method of claim 2 , wherein the dialysis machine comprises a peritoneal dialysis (PD) machine.4. The method of claim 1 , wherein the length of the first portion represents the location of the occlusion relative to a proximal end of the medical tube connected to the medical device.5. The method of claim 1 , wherein the first pressure and the second pressure are measured by a pressure sensor at a proximal end of ...

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Номер записи: 7
05-01-2017 дата публикации

Bio-Compatible Catheter

Номер: US20170000976A1
Автор: Marshall Kerr
Принадлежит: PFM MEDICAL Inc

A bio-compatible lumen bearing device such as a catheter formed of a polymeric material having a titanium surface bonded to the underlying exposed catheter surface. The titanium surface is employed in patients to improve bio-compatibility and enhance lubricity during insertion and removal.

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Номер записи: 8
14-01-2016 дата публикации

Pressure Actuated Valve with Improved Biasing Member

Номер: US20160008530A1
Автор: Cuthane Jim, WEAVER KARLA
Принадлежит: ANGIODYNAMICS, INC.

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 for controlling fluid flow to and from a vascular system of a patient through a vascular access catheter comprising:a flexible member including a first slit and a second slit disposed therein, the first slit and the second slit being disposed substantially symmetrically about a long axis of the flexible membrane; anda third slit disposed in between the plurality of the first slit and the second slit, wherein the third slit traverses a long axis of the flexible member.2. The valve of claim 1 , wherein each of the first slit and second slit are located near a periphery of the flexible member.3. The valve of claim 1 , wherein the flexible member is contained within a peripherally inserted central catheter.4. The valve of claim 1 , wherein the third slit further includes at least two moveable elements claim 1 , each moveable element further comprises a resilient flap.5. The valve of claim 4 , wherein the resilient flaps are made of a material with a predetermined amount of resilience to allow the resilient flaps to remain closed when the fluid pressure within the access catheter is within the range of up to 45 mmHg.6. The valve of claim 4 , wherein the resilient flaps are made of a material with a predetermined amount of resilience to allow the resilient flaps to open when the fluid pressure within the access catheter is over 45 mmHg.7. The valve of claim 1 , wherein the third slit is longer than the first slit and the second slit.8. The valve of claim ...

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Номер записи: 9
14-01-2016 дата публикации

Apparatuses, Systems, and Methods for Inserting Catheters Having Enhanced Stiffening and Guiding Features

Номер: US20160008573A1
Автор: Loesener German, Prechtel Ericka J.
Принадлежит:

Catheter apparatuses, systems, and methods for introducing a catheter into a patient's body. In one embodiment, a catheter apparatus includes a catheter body having a first lumen capable of fluid communication via a first distal opening and a second lumen capable of fluid communication via a second distal opening, a first intra-catheter stiffener element for disposition through the first lumen such that a distal end thereof is distal in relation to the first distal opening, and a second intra-catheter stiffener element configured for disposition through the second lumen such that a distal end thereof is distal in relation to the second distal opening, one of the first intra-catheter stiffener element distal end and the second intra-catheter stiffener element distal end capable of receiving and accommodating the other of the first intra-catheter stiffener element distal end and the second intra-catheter stiffener element distal end. 1. A catheter apparatus , comprising:a catheter body comprising a first lumen capable of fluid communication via a first distal opening and a second lumen capable of fluid communication via a second distal opening;a first intra-catheter stiffener element configured for disposition through the first lumen such that a distal end thereof is distal in relation to the first distal opening, the first intra-catheter stiffener element comprising at least one of a guide-wire and a stylet; anda second intra-catheter stiffener element configured for disposition through the second lumen such that a distal end thereof is distal in relation to the second distal opening, the second intra-catheter stiffener element comprising a guide-wire,one of the first intra-catheter stiffener element distal end and the second intra-catheter stiffener element distal end capable of receiving and accommodating the other of the first intra-catheter stiffener element distal end and the second intra-catheter stiffener element distal end.2. The apparatus of claim 1 , ...

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Номер записи: 10
10-01-2019 дата публикации

System and Method of Manufacturing Dialysis Catheters

Номер: US20190009050A1
Автор: Nardeo Mahase
Принадлежит: VascuTech Medical LLC

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 ...

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Номер записи: 11
19-01-2017 дата публикации

DEVICE FOR VASCULAR AND PERITONEAL ACCESS AND A DEVICE FOR HEMODIALYSIS

Номер: US20170014612A1
Автор: ANKARBRANTH Morgan, LUNDGREN Dan, NYMAN Rickard
Принадлежит:

An implantable device for venous or peritoneal access including a housing including a void having distal a proximal openings; an insert for insertion through the proximal opening comprising a venous or peritoneal catheter; a valve element mounted in a cylindrical recess of the insert; an extracorporeal coupling member of which a terminal portion can be inserted into a proximal recess of the valve element; one or two conduits extending from the catheter to the proximal end of the coupling member via the valve element and the insert for providing fluid communication, which can be interrupted by rotating the coupling member. The coupling member can be extracted from the recess only in a state of interrupted communication. 1. Device for venous or peritoneal access , comprising:a housing comprising a void;an insert disposable in the void and removable from it, the insert comprising a first conduit extending from a first distal face thereof disposed intra-corporeally to a bottom face of a recess in a second proximal face thereof disposed extra-corporeally, the faces including an angle α of about 90°;a cylindrical valve member housed in the insert recess, the valve member comprising a first valve conduit extending between the distal end face of the valve member and the bottom face of an oblong radially extending recess in a proximal face of the valve member;a coupling member comprising a portion extending from its distal end of same but positive form as the valve member recess and capable of being inserted into the recess and of being withdrawn from it, the coupling member comprising a first coupling conduit communicating, in an inserted position, with the first valve member conduit;wherein the first valve member conduit is displaceable by rotation of the valve member about its cylinder axis from an open position in which it is in communication with the first insert conduit to a closed position in which it is not or vice versa by rotation of the coupling member.2. The ...

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Номер записи: 12
16-01-2020 дата публикации

HEMODIALYSIS SYSTEM WITH ULTRAFILTRATION CONTROLLER

Номер: US20200016311A1
Автор: CORDER RODNEY, GIORDANO RENATO
Принадлежит: DIALITY INC.

The hemodialysis system includes a closed loop dialysate flow path which includes a dialyzer and a reservoir for storing dialysate, and a closed loop blood flow path which passes through the dialyzer in the opposite direction as the dialysate flow path. In addition, the hemodialysis system includes pumps for pumping dialysate and blood through their respective flow paths, a flow sensor for measuring the flow rate of dialysate in the dialysate flow path, and a level sensor for measuring the level of dialysate in the dialysate reservoir. A processor is connected to the flow sensor, reservoir level sensor and pumps to provide a first closed loop control system including the processor, flow sensor and a first dialysate pump, and a second closed loop control system including the processor, level sensor and a second dialysate pump which enable the processor to initiate, monitor and maintain ultrafiltration. 1. A hemodialysis system comprising:an arterial blood line for connecting to a patient's artery for collecting blood from a patient;a venous blood line for connecting to a patient's vein for returning blood to a patient;a dialyzer having a semipermeable membrane;a blood flow path connected to said arterial blood line and said venous blood line for transporting blood from a patient to said dialyzer and back to a patient, said blood flow path passing through said dialyzer on one side of said semipermeable membrane;a reservoir for storing a dialysate solution;a closed loop dialysate flow path, isolated from the blood flow path, for transporting a dialysate from said reservoir to said dialyzer and back to said reservoir, said dialysate flow path passing through said dialyzer on the side of the semipermeable membrane opposite said blood flow path;a blood pump for pumping blood through said blood flow path;a first dialysate pump connected to said dialysate flow path upflow from said dialyzer which pumps dialysate through said dialysate flow path; anda second dialysate pump ...

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Номер записи: 13
21-01-2021 дата публикации

SYSTEM AND METHOD FOR CARDIAC DIALYSIS

Номер: US20210015992A1
Автор: Weinfeld Doron
Принадлежит: Break-Three Medical Industries, Inc.

A system and method for treating a patient may include implanting an apparatus that includes a tube housing a one-way valve and having first and second surfaces. When the apparatus is implanted, the first surface is located inside the right atrium of the patient and the second surface is located on the skin of the patient. When implanted, the apparatus is used for drawing blood from the right atrium and/or providing a liquid to the patient. The apparatus may be designed to be hermetically sealed when disconnected from input and output lines. 1. A method of treating a patient , the method comprising:placing, in the right atrium of the patient, a device including at least one one-way valve; andusing the device for drawing blood from the right atrium, treating the blood and providing a liquid to the patient.2. The method of claim 1 , wherein the device is implanted in the right atrium and designed to be hermetically sealed when disconnected from input and output lines.3. The method of claim 1 , wherein the device includes:a conduit designed to house the one-way valve; andat least one elastic ring mounted on the conduit and adapted to hold the conduit in place.4. The method of claim 1 , wherein the device includes:a conduit designed to house the one-way valve; andfirst and second surfaces mounted on the conduit and adapted to hold the conduit in place by applying pressure on the patient's skin and on the inner wall of the right atrium.5. The method of claim 4 , comprising:accessing the right atrium of the heart through an anterior chest wall of the patient, using a percutaneous needle;deploying a plurality of suture mounted anchors into the right atrium of the heart, through the percutaneous needle;anteriorly drawing the right atrium of the heart towards the anterior chest wall;inserting the device into the right atrium of the heart along a guidewire;adjusting the distance between the first and second surfaces;tightening locking the first and second surfaces in place; ...

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Номер записи: 14
26-01-2017 дата публикации

HEMODIALYSIS ACCESS SYSTEM

Номер: US20170021087A1
Автор: Polaschegg Hans-Dietrich, Prosl Frank
Принадлежит:

A medical blood access system used for hemodialysis treatment to enable blood withdrawal for processing of blood by an external apparatus and return the same blood to a patient, comprising an interfacial fluid conduit between the machine and patient's blood supply which is repeatedly connectable along a guided pathway passing through epidermis and subcutaneous tissue via a naturally formed tissue tract to enter blood space, providing improved patient safely, convenience, effective prophylaxis, without bleeding or tissue trauma or pain, and is executable by the patient to precisely connect and disconnect with minimal disfigurement or life restrictions, and is useable on virtually all patients soon after placement and is robust and safe to high blood flow. 1. A medical blood access system used for hemodialysis treatment to enable blood withdrawal for processing of blood by an external apparatus and return the same blood to a patient , comprising an interfacial fluid conduit between the machine and patient's blood supply which is repeatedly connectable along a guided pathway passing through epidermis and subcutaneous tissue via a naturally formed tissue tract to enter blood space , providing improved patient safely , convenience , effective prophylaxis , without bleeding or tissue trauma or pain , and is executable by the patient to precisely connect and disconnect with minimal disfigurement or life restrictions , and is useable on virtually all patients soon after placement and is robust and safe to high blood flow.2. A system according to wherein the system comprises a totally implanted port claim 1 , with catheter and a tubular conduit called a needle assembly which couples with the port by inserting along a permanent passage through the subcutaneous tissue and into the port aperture and which is mechanically stopped at the proper docking position claim 1 , creating an open transcutaneous flow path from the exterior of the patient to patient's vasculature claim 1 , ...

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Номер записи: 15
31-01-2019 дата публикации

Totally Implantable Vascular Access Device With Integrated Subcutaneous Localization System

Номер: US20190029760A1
Автор: Allan Bloom, Dean Nahman, Hamutal Eytan
Принадлежит: Portsight Med Ltd

A totally implantable medical device configured to be implanted under a patient's dermal layer for vascular access comprising: a housing comprising a reservoir; said reservoir connected on one end thereof to a self-resealing penetrable septum and on the other end to an outlet cannula; and one or more inter-digitating light carrying channels connected with said housing having their openings circumferentially scattered about the outer rim of said septum, the device configured to be located using a generic light source.

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Номер записи: 16
07-02-2019 дата публикации

Infusion Methods for Extracoporeal Systems

Номер: US20190038890A1
Автор: Crnkovich Martin Joseph, Schlaeper Christian, Yuds David
Принадлежит:

A method of operating an extracorporeal blood treatment system to infuse blood into a patient at an end of an extracorporeal blood treatment includes clamping an access line of an arterial line set. The method further includes, after clamping the access line, initiating an operation to generate negative pressure in the arterial line set. The method further includes, after generating the negative pressure in the arterial line set, unclamping the access line to draw fluid in the access line further into the arterial line set in a direction away from an end of the access line that is connectable to an arterial access of the patient. The method further includes initiating an operation of a fluid pump engaged with the arterial line set such that the fluid in the arterial line set is infused into the patient through a venous line set. 1. A method of operating an extracorporeal blood treatment system to infuse blood into a patient after an extracorporeal blood treatment , the method comprising:clamping an access line of an arterial line set, the arterial line set comprising an arterial line connectable to the access line, the access line being connectable to an arterial access of the patient;after clamping the access line, initiating an operation to generate negative pressure in the arterial line set;after generating the negative pressure in the arterial line set, unclamping the access line to draw fluid in the access line further into the arterial line set in a direction away from an end of the access line that is connectable to the arterial access of the patient; andinitiating an operation of a fluid pump engaged with the arterial line set such that the fluid in the arterial line set is infused into the patient through a venous line set.2. The method of claim 1 , further comprising claim 1 , after an end of the extracorporeal blood treatment and before clamping the access line claim 1 , initiating an operation to deactivate an ultrafiltration pump and to deactivate the ...

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Номер записи: 17
03-03-2022 дата публикации

Dialysis Catheters With Integrated Fluid Status Sensing and Related Systems and Methods

Номер: US20220061804A1
Автор: Fiachra Sweeney
Принадлежит: Foundry Innovation and Research 1 Ltd

A dialysis catheter with an elongate body has a distal end defining blood removal and return ports communicating with internal blood removal and return lumens extending through the elongate body. A sensing pathway is disposed in or on the elongate body. A vascular dimension sensor is provided to dynamically measure changes in dimension of the SVC or IVC during dialysis. The sensor communicates with a control system and may be controlled or positioned via the communication pathway of the catheter body. Systems disclosed included integrated closed-loop treatment based on monitored vascular dimension input. Methods included patient optimized treatments incorporating treatment modulation based on dynamic vascular dimension monitoring.

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Номер записи: 18
14-02-2019 дата публикации

SKIN SURFACE INDWELLING DEVICE FOR GUIDING PUNCTURES

Номер: US20190046233A1
Автор: Feng Yong, Hu Wei, HUANG KAI, PAN Chengrui, Song Jian, TANG Xin, Xue Yueqiang, Yuan Zhenhua, Zhang Jing, Zhou Jianming
Принадлежит:

A skin surface indwelling device for guiding punctures includes: an indwelling tube () having an inside tunnel (P) substantially extending along the longitudinal direction of the indwelling tube (), the tunnel (P) is used for guiding needle (N), the indwelling tube () has a proximal end positioned above the skin surface (S) and a distal end positioned under the skin surface (S) in indwelling state; a support () having a bottom surface on its bottom that directly or indirectly contacts with the skin surface (S), the support () supports and fixates the indwelling tube (); and a sealing elements () configured to seal the tunnel (P). The skin surface indwelling device for guiding punctures can shorten the time of establishing a puncture tunnel in the buttonhole puncture method, and help to build the puncture tunnel. In addition, the skin surface indwelling device can also guide the puncture needle (N) when puncturing, and protect the immature puncture tunnel. 1. A skin surface indwelling device for guiding punctures , comprising:an indwelling tube having an inside tunnel substantially extending along the longitudinal direction of the indwelling tube, wherein the tunnel is used for guiding a needle, the indwelling tube has a proximal end positioned above the skin surface and a distal end positioned under the skin surface in indwelling state; a support having a bottom surface that directly or indirectly contacts with the skin surface, wherein the support supports and fixates the indwelling tube;and sealing elements configured to seal the tunnel.2. The device of claim 1 , wherein the extension length of the distal end is set in such a way that the bottom of the distal end is close to the vascular wall to be punctured but not in contact with the vascular wall to be punctured.3. The device of claim 1 , wherein the diameter of the tunnel is slightly larger than the outer diameter of the needle.4. The device of claim 1 , wherein the angle between the bottom surface of the ...

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Номер записи: 19
19-02-2015 дата публикации

Systems and methods for a fluid carrying conduit of a vascular access system

Номер: US20150051532A1
Автор: Daniel Tomko, David Gale, Stacy Arnold, Venkata Katragadda
Принадлежит: Cryolife Inc

Systems and methods for a blood conduit for fluidly coupling a first vascular segment to a second vascular segment are disclosed herein. In one embodiment, a system for fluidly coupling proximal and distal tubular segments of a fluid conduit in a cardiovascular system is provided. The system may include a first engagement feature disposed on a distal end of the proximal tubular segment. The system also may include a second engagement feature disposed on a proximal end of the distal tubular segment. The first engagement feature may be configured to mate with the second engagement feature. In this manner, continuous flow may be provided between the proximal and distal tubular segments of the fluid conduit. In another embodiment, the proximal and distal tubular segments of the fluid conduit may collectively form a single unitary lumen without a connection device interposed between the segments.

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Номер записи: 20
19-02-2015 дата публикации

Catheter flow controlling

Номер: US20150051537A1
Автор: Brent Marsden
Принадлежит: COVIDIEN LP

A catheter hub includes a hub body defining a first lumen and a second lumen. At least a portion of the first lumen defines a first longitudinal axis, and at least a portion of the second lumen defines a second longitudinal axis. A cap coupled to the hub body is configured and arranged in a non-intersecting orientation relative to the first and second longitudinal axes. A first arm and a second arm each includes a distal portion coupled to the hub body, and a proximal portion which is movable, in a direction toward a respective longitudinal axis, into releasable engagement with the cap.

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Номер записи: 21
14-02-2019 дата публикации

DETECTING PRESSURE PULSES IN A BLOOD PROCESSING APPARATUS

Номер: US20190046709A1
Автор: Hansson Per, Holmer Mattias, Olde Bo, Solem Kristian, Sternby Jan, Wallenborg Anders
Принадлежит:

A monitoring device operates on a pressure signal from a blood processing apparatus which has an extracorporeal blood circuit for pumping blood through a dialyzer, and a treatment fluid supply system for pumping a treatment fluid through the dialyzer. The monitoring device has a first input block for obtaining a first pressure signal, and a second input block for obtaining a second pressure signal. An emulation block generates, as a function of the second pressure signal, an emulated first pressure signal which emulates a concurrent signal response of the first pressure sensor, and a filtering block generates a filtered signal as a function of the first pressure signal and the emulated first pressure signal, so as to suppress, in the filtered signal compared to the first pressure signal, signal interferences originating from the treatment fluid supply system. A pulse detection block processes the filtered signal for detection of subject pulses. 1: A monitoring device comprising:a first input block configured to obtain a first pressure signal (y) from a first pressure sensor, which is arranged in an extracorporeal blood circuit to detect pressure variations in blood which is pumped through a blood processing unit in the extracorporeal blood circuit by a blood pumping device, wherein the extracorporeal blood circuit is connected to a vascular system of a subject;a second input block configured to obtain a second pressure signal (u) from a second pressure sensor, which is arranged in a treatment fluid supply system to detect pressure variations in a treatment fluid which is pumped through the blood processing unit by the treatment fluid supply system;an emulation block configured to generate, as a function of the second pressure signal (u), an emulated first pressure signal (ŷ) which emulates a signal response of the first pressure sensor concurrently over a period of time of the first pressure signal of the first pressure sensor;{'sub': f', 'f, 'a filtering block ...

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Номер записи: 22
14-02-2019 дата публикации

Pressure Activated Valve with High Flow Slit

Номер: US20190046785A1
Автор: DiCarlo Paul D., WEAVER KARLA
Принадлежит: ANGIODYNAMICS, INC.

A pressure actuated valve for controlling the flow of fluid through a medical device, the valve comprises a housing including a lumen extending therethrough and a flow control membrane extending across the lumen to control the flow of fluid through the lumen. The membrane includes a plurality of slits extending therethrough so that, when the membrane is acted upon by a pressure of at least a threshold magnitude, the slits open to permit flow through the lumen and, when not acted upon by a pressure of at least the predetermined magnitude, the slits are maintained dosed by a biasing force applied thereto by the membrane to prevent flow through the lumen. Each of the slits extends between end portions thereof along a curve wherein a distance between a first end portion of a first one of the slits and a first end portion of a second one of the slits is a minimum distance between the first and second slits. 1. A pressure actuated valve for controlling the flow of fluid through a medical device , the valve comprising:a housing including a lumen extending therethrough; anda flow control membrane extending across the lumen to control the flow of fluid through the lumen, the membrane including a plurality of slits extending therethrough, wherein, when the membrane is acted upon by a pressure of at least a threshold magnitude, the slits open to permit flow through the lumen and, when not acted upon by a pressure of at least the predetermined magnitude, the slits are maintained closed by a biasing force applied thereto by the membrane to prevent flow through the lumen, wherein each of the slits extends between end portions thereof along a curve and wherein a distance between a first end portion of a first one of the slits and a first end portion of a second one of the slits is a minimum distance between the first and second slits.2. The valve according to claim 1 , wherein the first slit extends along a portion of a curve having a first radius of curvature and the second slit ...

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Номер записи: 23
25-02-2016 дата публикации

Solid-Body Catheter Including Lateral Distal Openings

Номер: US20160051745A1
Автор: Gregersen Colin S.
Принадлежит:

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 includes an atraumatic nose portion defining 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 also includes 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 catheter for vascular insertion , 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;an atraumatic nose portion at a distal end of the catheter body, the nose portion defining a first distal opening in fluid communication with the first lumen and a second distal opening in fluid communication with the second lumen; a first cut at an angle relative to a longitudinal axis of the catheter body in the range from about 20 degrees to about 90 degrees; and', 'a second cut at an angle relative to a plane through the septum of about 45 degrees or less;, 'a first lateral opening in fluid communication with the first lumen at the distal end of the catheter body proximal to the nose portion, the first lateral opening defined by a skive cut through the outer wall of the catheter body, the skive cut defined bya second lateral opening in fluid communication with the second lumen at the distal end of the catheter body proximal to the nose portion.2. The catheter according to claim 1 , wherein the first cut is about 30 degrees claim 1 , and wherein the second cut is about 25 degrees.3. The catheter according to claim 1 , wherein the first cut is about 35 degrees claim ...

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Номер записи: 24
25-02-2021 дата публикации

Blood Purification Apparatus

Номер: US20210052799A1
Автор: Akita Kunihiko, Hasegawa Shinya, Toyoda Masahiro
Принадлежит:

A blood purification apparatus that includes a blood circuit including an arterial blood circuit provided with an arterial puncture needle and a venous blood circuit provided with a venous puncture needle with which an access vessel is puncturable, the blood circuit allowing blood of the patient to extracorporeally circulate; a blood purifier connected to the arterial blood circuit and to the venous blood circuit and that purifies the blood flowing through the blood circuit; a blood pump provided to the arterial blood circuit; a recirculating-blood-detecting unit capable of detecting recirculating blood when the blood of the patient is caused to extracorporeally circulate through the blood circuit by activating the blood pump, the recirculating blood being blood once returned to the patient from the venous blood circuit and reintroduced into the arterial blood circuit; and a recirculation-rate-calculating unit capable of calculating recirculation rate, the recirculation rate being a proportion of the recirculating blood in the blood flowing in the arterial blood circuit. The blood purification apparatus includes a control unit capable of executing a treatment mode in which blood purification treatment is performed with the blood purifier while the blood of the patient is caused to extracorporeally circulate through the blood circuit by activating the blood pump in a state of normal connection where an upstream part of the access vessel is punctured with the puncture needle at a distal end of the arterial blood circuit and a downstream part of the access vessel is punctured with the puncture needle at a distal end of the venous blood circuit; and a measurement mode in which the detection of recirculating blood by the recirculating-blood-detecting unit and the calculation of recirculation rate by the recirculation-rate-calculating unit are performed while the blood of the patient is caused to extracorporeally circulate through the blood circuit by activating the blood ...

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Номер записи: 25
10-03-2022 дата публикации

MEDICAL ACCESS PORTS, TRANSFER DEVICES AND METHODS OF USE THEREOF

Номер: US20220072222A1
Автор: Butziger John M., Murphy Ronald P., TALLARIDA Steven J.
Принадлежит: VERSAGO VASCULAR ACCESS, INC.

An access port system, comprising an implantable access port, the access port including an access port body, an access port needle and a fluid flow passage provided within the body and the needle; wherein the needle is fully containable within the body, and the needle is exposable outside the body; wherein the needle is arranged within the body to penetrate outwardly of the subject from within the subject when the access port is implanted in the subject; wherein, when the needle is exposed outside the body, the fluid flow passage is open to a flow of a fluid within the access port in at least a direction entering the access port through the needle and thereafter exiting the access port from the body; and wherein the assess port includes at least one sensor configured to detect the fluid within the fluid flow passage. 1. An access port system , comprising:an implantable access port configured to be implanted into a subject, the access port including an access port body, a first access port needle and a fluid flow passage provided within the access port body and the first access port needle;wherein the first access port needle is fully containable within the access port body, and the first access port needle is exposable outside the access port body;wherein the first access port needle is arranged within the access port body to penetrate outwardly of the subject from within the subject when the access port is implanted in the subject; andwherein the first access port needle includes a first needle shaft and a first removable needle tip that removably closes a distal end of the first needle shaft.2. The access port system of claim 1 , wherein the first removable needle tip is configured to dilate the subject to reduce injury.3. The access port system of claim 2 , wherein the first removable needle tip has a pointed tip.4. The access port system of claim 1 , wherein the first removable needle tip is removably coupled to the first needle shaft by threaded engagement.5. ...

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Номер записи: 26
01-03-2018 дата публикации

Split Tip Catheter

Номер: US20180056031A1
Автор: Nardeo Mahase
Принадлежит: VascuTech Medical LLC

The present disclosure relates to catheter assembly and components thereof. In one embodiment, a catheter assembly includes a catheter including a body with a proximal end and a distal end, wherein the body includes a first lumen and a second lumen. The lumens are substantially symmetrical and are joined together and split at the distal ends thereof. The distal ends are bent apart from each other such that the catheter resembles a Y-shape when viewed from the front. Each of the distal ends comprises a U-shaped cutout to prevent the inflow of blood from becoming blocked. Because the lumens are substantially equal in size, shape, and dimension, the connection can be reversed without high recirculation if one lumen is blocked. 1. A split tip catheter assembly , comprising:a first lumen and a second lumen, each of the first lumen and the second lumen having a proximal end and a distal end, wherein the first lumen and the second lumen are bonded at the proximal end and separated at the distal end;the distal end of the first lumen and the second lumen bent away from each other; anda cutout disposed on the distal end of each of the first lumen and the second lumen.2. The split tip catheter assembly of claim 1 , wherein a cross section of each of the first lumen and the second lumen is D-shaped.3. The split tip catheter assembly of claim 1 , wherein the cutout is U-shaped.4. The split tip catheter assembly of claim 1 , wherein each of the first lumen and the second lumen comprises a flat side and a rounded side claim 1 , further wherein the cutout is disposed on the rounded side of the first lumen and the second lumen.5. The split tip catheter assembly of claim 1 , wherein the first lumen and the second lumen are substantially symmetrical.6. The split tip catheter assembly of claim 1 , wherein a cross section of the proximal end of the first lumen and the second lumen is substantially circular.7. The split tip catheter assembly of claim 1 , wherein the proximal end of each ...

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Номер записи: 27
28-02-2019 дата публикации

SUBCUTANEOUS VASCULAR ACCESS PORTS AND RELATED SYSTEMS AND METHODS

Номер: US20190060552A1
Автор: Blatter Duane D., Crawford Mark A., Johnson Steven, Perry Trent J., Phillips Christopher M., Smith G. Doug, Young Nathaniel P.
Принадлежит:

Ports for accessing a vessels within a patient include passageways that can guide needles or other access devices directly into the vessels. The ports can be implanted subcutaneously within a patient. Some ports may be used in the creation and use of vascular access buttonholes. 1positioning an access port adjacent to a wall of the vessel, the access port comprising an implantation passageway and a guidance passageway that is connected to the implantation passageway, wherein, during said positioning of the access port, the implantation passageway is open at a position proximal to a location at which the implantation passageway and the guidance passageway are connected;forming an opening in the wall of the vessel via instruments that extend through the implantation passageway;securing the access port to the vessel such that the implantation passageway is in fluid communication with an interior of the vessel via the opening in the wall of the vessel; andsealing the implantation passageway at the position proximal to the guidance passageway.. A method of securing an access port to a vessel, the method comprising: This application is a continuation of U.S. patent application Ser. No. 14/792,486, filed on Jul. 6, 2015, titled METHODS FOR IMPLANTING SUBCUTANEOUS VASCULAR ACCESS PORTS, which is a continuation of U.S. patent application Ser. No. 12/697,192, filed on Jan. 29, 2010, titled SUBCUTANEOUS VASCULAR ACCESS PORTS AND RELATED SYSTEMS AND METHODS, corresponding to U.S. Pat. No. 9,072,880, which claims the benefit under 35 U.S.C. § 119(e) of U.S. Provisional Patent Application No. 61/148,372, titled VASCULAR ACCESS METHODS, APPARATUS AND SYSTEMS, filed on Jan. 29, 2009, and of U.S. Provisional Patent Application No. 61/229,023, titled SURGICALLY IMPLANTED DIRECT VASCULAR ACCESS PORT METHOD AND APPARATUS, filed on Jul. 28, 2009, the entire contents of each of which are hereby incorporated by reference herein.The invention was made with support from the U.S. Government ...

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Номер записи: 28
27-02-2020 дата публикации

Pressure Actuated Valve with Improved Biasing Member

Номер: US20200061279A1
Автор: Cuthane Jim, WEAVER KARLA
Принадлежит: ANGIODYNAMICS, INC.

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 ...

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Номер записи: 29
27-02-2020 дата публикации

SYMMETRICAL TIP ACUTE CATHETER

Номер: US20200061334A1
Автор: Bellisario Marc, Thomashey David
Принадлежит:

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 ...

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Номер записи: 30
27-02-2020 дата публикации

System for its use in the treatment of vascular stenosis and occlusions

Номер: US20200061349A1
Автор: Basiony Mohamed A
Принадлежит:

A system to be used inside a dialysis unit for dilating obstructed blood vessel, comprises a catheter, a device, a remote-control box, supportive components and connection cables. A catheter comprises an elongated portion, a proximal end and a distal end, extended longitudinally. A distal end of a catheter has a convectively heating tip with a heat generating element and an inflatable balloon. A device has a radiofrequency current generator to supply and control a heating process of a heat generating element of a catheter tip. A remote-control box comprises a valve assembly, a heat activation switch and a balloon inflation switch to facilitate a treatment process. 1. A system comprising a catheter , a device , a remote-control box , supportive components and connection cables that are connected together to form said system.Said catheter comprises an elongated portion, a proximal end and a distal end, extended longitudinally;An elongated portion comprises an outer tube, an inner tube, a side tube, two stylets, a single radiofrequency lead and temperature sensor leads that are extended between a distal end and a proximal end of said catheter;A distal end comprises a distal end of said inner tube, a distal end of said outer tube, a distal end of said side tube, an inflatable balloon, a heat generating element, a ceramic portion, a temperature sensor with its distal leads, a distal end of a single radiofrequency lead and distal ends of two stylets;A proximal end comprises a proximal end of said inner tube, a proximal end of said outer tube, a proximal end of a said side tube with its proximal extension, a proximal end of two stylets, a proximal end of a single radiofrequency lead, a proximal end of temperature sensors leads and a coupling assembly with a syringe;Said device has a radiofrequency current generator and control, an OFF/ON switch, an alarm LED, a radiofrequency energy control knob, a display unit of a set radiofrequency energy, a time set/monitor for heating ...

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Номер записи: 31
11-03-2021 дата публикации

Dialysis Catheter

Номер: US20210069477A1
Автор: Fitzgerald John, Rusnak Joseph G., Zygaj Raymond
Принадлежит:

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 ...

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Номер записи: 32
17-03-2016 дата публикации

Portable hemodialysis assembly with ammonia sensor

Номер: US20160074567A1
Автор: Renato Giordano, Rodney Corder
Принадлежит: ASIT ENGINEERING CORP

A portable hemodialysis system is provided including a disposable cartridge and a reused dialysis machine. The disposable cartridge includes a dialysate flow path and a blood flow path which flow in opposite directions through a dialyzer. The disposable cartridge includes a filter for removing waste products from the dialysate, and pressure and fluid flow sensors for measuring the pressure and fluid flow in the dialysate flow path and blood flow path. Preferably, the filter has a vapor membrane for releasing gases including ammonia, but not liquids such as the dialysate. The reused dialysis machine possesses a reservoir for dialysate, an ammonia sensor adjacent to the vapor membrane, a level sensor, a blood leak sensor, a venous blood line pressure sensor, a venous blood line bubble detector, pump motors, and a processor connected to the motors and sensors for controlling and monitoring hemodialysis treatment.

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Номер записи: 33
17-03-2016 дата публикации

Portable hemodialysis machine and disposable cartridge with blood leak sensor

Номер: US20160074568A1
Автор: Renato Giordano, Rodney Corder
Принадлежит: ASIT ENGINEERING CORP

A portable hemodialysis system is provided including a disposable cartridge and a reused dialysis machine. The disposable cartridge includes a dialysate flow path and a blood flow path which flow in opposite directions through a dialyzer. The disposable cartridge includes a filter for removing waste products from the dialysate. The reused dialysis machine possesses a reservoir for dialysate, various sensors including a blood leak sensor assembly, and a processor connected to the various sensors for controlling and monitoring hemodialysis treatment. The blood leak sensor assembly includes a light source for emitting light through the dialysate flow path and a light sensor for receiving light having passed through the dialysate flow path. The processor is connected to the light source for determining whether blood has leaked from the blood flow path into the dialysate flow path. Preferably, the light source emits light having two peak wavelengths.

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Номер записи: 34
16-03-2017 дата публикации

Hemodialysis catheter sleeve

Номер: US20170072129A1
Автор: Aleksey Kurdyumov, Anh Tri La, Bruce Jelle, Charlie OLSON, David E. Babcock, Gary MAHARAJ, Joe McGonigle, Joram Slager, Nathan Lockwood, Timothy M. Kloke
Принадлежит: Surmodics Inc

A hemodialysis vascular access device includes a proximal end sized and shaped to sealably couple to a hemodialysis catheter, a movable structure coupled to the proximal end, a fixation structure coupled to the movable region and sized and shaped for fixation on a patient, an elongated sleeve coupled to the fixation structure and sized and shaped for insertion into a patient's vasculature, and a valve at a distal end of the internal lumen. When a hemodialysis catheter is inserted into the device and coupled to the proximal end, distal movement of the proximal end relative to the fixation structure biases a distal end of the hemodialysis catheter from a position inside the elongated sleeve through a valve out of the device and into the patient's blood.

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Номер записи: 35
05-03-2020 дата публикации

VASCULAR ACCESS DEVICE AND METHOD

Номер: US20200069929A1
Автор: Grey David, Hadas Noam, Libman Philip, MASON Roger, ZICHERMAN Yehuda
Принадлежит:

A vascular access device is disclosed including a needle insertion guide having a proximal end and a distal end a the guide including a needle insertion guide having a proximal end and a distal end and a vessel interface configured for attaching the distal end of the guide to a target on an unbroken outer wall of a blood vessel of a living subject and a skin interface configured for attaching the proximal end of the guide to a skin of the living subject. Optionally the vessel interface is connected to the guide by a flexible joint configured. Optionally two vascular access devices are connected by an electrically conductive connection. Optionally the vascular access device includes a sensor to determine when a needle enters the blood vessel. Optionally the vascular access device serves as a marker for a sensor determining a status of the blood vessel. 1. An implantable device for vascular access , comprising:{'sup': '2', 'a guide including a lumen shaped and sized to fit a hemodialysis needle constraining the needle to an angle of less than 5 degrees with respect to the lumen and constraining a position of a distal tip of the needle to a target of less than 90 mmat a distal end of said lumen on a front wall of a blood vessel;'}a sensor attached to said guide, said sensor configured to send a signal when a tip of said needle passes a predetermined position within 4 mm of and proximal of said distal end of said lumen; andan indicator responsive to said signal and to produce a signal visible to a practitioner through a skin of a subject.2. The device of claim 1 , wherein a length of the lumen is between 7 mm and 70 mm.3. The device of claim 1 , wherein a length of the lumen is between 7 mm and 35 mm.4. The device of claim 1 , wherein the lumen has an average inner width of between 2 mm and 7 mm.5. The device of claim 1 , wherein said indicator is mounted on said guide.6. The device of claim 5 , wherein said indicator is configured to be visible from outside through ...

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Номер записи: 36
05-06-2014 дата публикации

Catheter

Номер: US20140155802A1
Автор: David G. Quinn
Принадлежит: Radius International Inc

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.

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Номер записи: 37
14-03-2019 дата публикации

CATHETER POSITIONING

Номер: US20190076624A1
Автор: McDermott Sean
Принадлежит:

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 ...

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Номер записи: 38
31-03-2022 дата публикации

APPARATUS FOR EXTRACORPOREAL BLOOD TREATMENT

Номер: US20220096719A1
Автор: Lodi Carlo Alberto, Rovatti Paolo, Surace Alessandro
Принадлежит:

An extracorporeal blood treatment apparatus is provided comprising a filtration unit connected to a blood circuit and to a dialysate circuit, a preparation device for preparing and regulating the composition of the dialysis fluid; a control unit is configured for setting a sodium concentration value for the dialysis fluid in the dialysis supply line at a set point based on the physician prescription; starting from the initial patient plasma conductivity, estimated at the beginning of the treatment, and based on the target plasma conductivity/sodium concentration which is equivalent to the dialysate conductivity/sodium concentration prescribed, the control unit determines the minimum constant gradient between dialysis fluid and plasma conductivity/concentration to be maintained during treatment to achieve the conductivity/concentration target in the patient plasma at the end of the session. 118-. (canceled)19: An apparatus for extracorporeal blood treatment comprising:a filtration unit having a primary chamber and a secondary chamber separated by a semi-permeable membrane;a blood circuit including a blood withdrawal line connected to an inlet of the primary chamber and a blood return line connected to an outlet of the primary chamber, said blood lines being configured for connection to a patient cardiovascular system;a dialysis supply line connected to an inlet of the secondary chamber;a dialysis effluent line connected to an outlet of the secondary chamber;a preparation device configured to prepare a dialysis fluid, the preparation device connected to said dialysis supply line and including a regulator configured to regulate the composition of the dialysis fluid;a sensor configured to measure a parameter value of a dialysate in the dialysis effluent line, said parameter value of the dialysate being at least one selected from the group consisting of a conductivity of the dialysate and a concentration of at least a substance in the dialysate; set a parameter value for ...

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Номер записи: 39
12-03-2020 дата публикации

SHEATH

Номер: US20200078567A1
Автор: Gordon Gregory
Принадлежит:

The present application includes a sheath that is suitable for use in a variety of medical procedures. In one or more implementations, the sheath includes a shunt member, and a curvable portion. The curvable portion may be configured in various orientations to facilitate an intervention, such as a hemodialysis intervention, or the like, by an operator. The curvable portion may be configured to bend between a substantially straight configuration and a curved configuration. In implementations, the sheath may be configured to have detachable and/or interchangeable components (e.g., shunt member, curvable portion, etc.). 1. A sheath comprising:a detachable shunt member configured to extend through a perforation in a side wall of an internal patient conduit source and into an anatomical conduit;a detachable junction configured to receive an interventional tool;a detachable curvable portion having a first end configured to be coupled to the shunt member and a second end configured to be coupled to the detachable junction, the curvable portion configured to bend between a curved configuration and a substantially straight configuration where the first end is linearly distal to the second end.2. The sheath as recited in claim 1 , wherein the curvable portion is configured to form up to an 180° curve when the curvable portion is in the curved configuration.3. The sheath as recited in claim 1 , wherein the curvable portion is comprised of a semi-rigid material and is configured to retain a desired curved configuration.4. The sheath as recited in claim 1 , further comprising:a clasp configured to hold the curvable portion in the curved configuration.5. The sheath as recited in claim 4 , wherein the clasp is coupled to at least one of the first end of the curvable portion or the second end of the curvable portion and to be selectively coupled at a position proximate to the other of the first end of the curvable portion and the second end of the curvable portion.6. The sheath as ...

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Номер записи: 40
26-03-2015 дата публикации

MULTI-PATH CONTROL VALVE

Номер: US20150088055A1
Автор: Tan Ta-Lun
Принадлежит:

A control valve includes a tube housing, a tube within the tube housing, and a clamp within the tube housing. The tube is disposed between a first portion of the tube housing and the clamp, and the clamp is movable between an open position and a closed position. The clamp in the open position is located away from the first portion of the tube housing, and the clamp in the first closed position is located adjacent to the first portion of the tube housing. 1. A control valve comprising:a tube housing;a tube disposed through the tube housing; anda clamp disposed within the tube housing,wherein the tube is disposed between a first portion of the tube housing and the clamp, andwherein the clamp is movable between an open position and a closed position,wherein the clamp in the open position is located away from the first portion of the tube housing, andwherein the clamp in the closed position is located adjacent to the first portion of the tube housing.2. The control valve of claim 1 , wherein the tube is flexible.3. The control valve of claim 1 , further comprising:a tube groove for on a bottom surface of the tube housing, wherein the tube is disposed within the tube groove; anda clamp groove formed on a top surface of the tube housing, wherein the clamp is disposed within the clamp groove.4. The control valve of claim 3 , wherein the tube groove travels through the clamp groove.5. The control valve of claim 1 , further comprising:a shaft housing coupled to the tube housing,a shaft coupled to the shaft housing; anda gear coupled to an end of the shaft such that rotating the shaft rotates the gear, and wherein the gear is further coupled to the clamp such that rotating the gear laterally shifts the clamp.6. The control valve of claim 5 , wherein the clamp comprises:a rack portion coupled to the gear; anda clamping portion that protrudes from the rack portion such that the tube is disposed between the clamping portion of the clamp and the first portion of the tube housing. ...

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Номер записи: 41
05-05-2022 дата публикации

VARIABLE ORIFICE FISTULA GRAFT

Номер: US20220133974A1
Автор: McDermott Sean
Принадлежит:

A medical implant includes a primary tubular member having a first end and a second end and defining a primary longitudinal axis and a primary lumen. The primary tubular member is disposed in an arterial-venous connection. The medical implant also includes a baffle disposed transversely to the primary longitudinal axis within the primary lumen. The baffle defines at least one aperture therethrough.

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Номер записи: 42
05-05-2022 дата публикации

EXTRACORPOREAL BLOOD LINE SET AND BLOOD TREATMENT MACHINE

Номер: US20220133975A1
Автор: JANIK WALDEMAR
Принадлежит:

An extracorporeal blood line set for a blood treatment machine or as part of a blood treatment machine, especially a dialysis machine. The extracorporeal blood line set includes an arterial blood line having a distal patient access and a proximal device port, preferably a dialyzer port, a venous blood line having a distal patient access and a proximal device port, preferably a dialyzer port, and at least one fluid supply line which is connected to the arterial and/or venous blood line(s) in at least one port section of the arterial and/or venous blood line(s) and at one end includes a container port or a fluid container. The at least one port section is in the form of a Venturi nozzle.

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Номер записи: 43
12-05-2022 дата публикации

ENDOVASCULAR IMPLANTS AND DEVICES AND METHODS FOR ACCURATE PLACEMENT

Номер: US20220143289A1
Автор: van der Burg Erik
Принадлежит:

Various systems, devices, and methods for endovascular implants and accurate placement thereof are disclosed. The disclosed implants include a proximal implant segment, a distal implant segment, connector struts connecting the proximal implant segment to the distal implant segment, and a side opening between the proximal implant segment and the distal implant segment. The disclosed implants can be used to create an arteriovenous fistula or connect one vessel of the body to another by placement of the proximal implant segment and the distal implant segment within the vessels to be connected. The disclosed implants can include one or more anchors for securing the implant in place with respect to the vessels of the body it is connecting. The disclosed implants can also include a continuous strut or ring at a distal edge of the proximal implant segment. Also disclosed are methods for accurate percutaneous placement of the implants disclosed, and a device for percutaneous delivery. 1. A system for creating an arteriovenous fistula in an arm of a patient , the system comprising:an endovascular delivery device configured for access into the arm of the patient, wherein the endovascular delivery device is configured to be advanced into a superficial vein, into a perforator vein, into a deep vein, and into an artery adjacent to the deep vein; and a proximal implant segment comprising a proximal end and a distal end, the proximal implant segment being releasable from the endovascular delivery device to transform from a radially compressed configuration to a radially expanded configuration in which the proximal implant segment extends through the perforator vein and the deep vein with the proximal end of the proximal implant segment positioned within the perforator vein; and', 'a distal implant segment connected to the proximal implant segment, the distal implant segment being releasable from the endovascular delivery device to transform from a radially compressed configuration ...

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Номер записи: 44
08-04-2021 дата публикации

FLUSHING STYLET

Номер: US20210100975A1
Автор: Fairneny Ty, Johnston Thomas M.
Принадлежит:

Systems and methods for use medical procedures including catheters and stylets are disclosed. The catheter includes a wall having an inner surface and an outer surface, the inner surface defining a lumen, and the wall defining at least one side opening from the outer surface to the inner surface. The stylet includes an elongate body defining a passage and at least one aperture in fluid communication with the passage. The stylet also includes a first blocking dam secured to the elongate body proximal to the at least one aperture and a second blocking dam secured to the elongate body distal to the at least one aperture. The stylet is movable within the lumen to a position in which the first and second blocking dams are, respectively, proximal and distal to the at least one side opening of the catheter and each of the first and second blocking dams is sealingly engaged with the inner surface of the catheter such that fluid introduced into the lumen, from the passage and through the at least one aperture of the stylet, is directed through the at least one side opening of the catheter. 120-. (canceled)21: A stylet comprising:an elongate body defining a passage and a plurality of apertures in fluid communication with the passage;a first blocking dam secured to the elongate body proximal to the plurality of apertures; anda second blocking dam secured to the elongate body distal to the plurality of apertures, wherein the first and second blocking dams each defines a D-shaped cross-section, andwherein the elongate body is configured to be movable within a lumen of a catheter to a position in which the first and second blocking dams are, respectively, proximal and distal to a side opening of the catheter and each of the first and second blocking dams is sealingly engageable with an inner surface of the catheter such that fluid introduced into the lumen of the catheter, from the passage and through the at least one aperture of the stylet, is directed through the side opening ...

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Номер записи: 45
13-04-2017 дата публикации

Symmetrical tip acute catheter

Номер: US20170100560A1
Автор: David Thomashey, Marc Bellisario
Принадлежит: COVIDIEN LP

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.

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Номер записи: 46
23-04-2015 дата публикации

SHEATH

Номер: US20150112242A1
Автор: Gordon Gregory
Принадлежит: Board of Regents of the University of Nebraska

The present application includes a sheath that is suitable for use in a variety of medical procedures. In one or more implementations, the sheath includes a shunt member, and a curvable portion. The curvable portion may be configured in various orientations to facilitate an intervention, such as a hemodialysis intervention, or the like, by an operator. The curvable portion may be configured to bend between a substantially straight configuration and a curved configuration. In implementations, the sheath may be configured to have detachable and/or interchangeable components (e.g., shunt member, curvable portion, etc.). 120-. (canceled)21. A system of using a sheath device configured to receive an interventional tool , the system comprising:a detachable shunt member positionable through a perforation in a side wall of an anatomical vessel, the detachable shunt member including: a distal opening configured to reside in the anatomical vessel, and a connection member that resides external to the anatomical vessel and that includes a first septum configured to receive an interventional tool therethrough;a detachable curvable sheath tube matable to the connection member including the first septum of the shunt member, wherein the detachable curvable sheath tube includes: a distal end that is smaller in outer diameter than, and detachably mated with, a proximal end of the connection member of the shunt member, and a proximal end opposite from the distal end, and a tube wall configured to bend between a curved configuration and a substantially straight configuration, wherein the proximal end of the detachable curvable sheath tube is coupled with a septum hub configured to receive the interventional tool, the septum hub having an introducer portion at a proximal end of the septum hub and a secondary tube for injecting or suctioning fluids; andwherein an internal access path defined through the septum hub, the detachable curvable sheath tube, the shunt member, and the anatomical ...

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Номер записи: 47
02-04-2020 дата публикации

DIALYSIS ACCESS

Номер: US20200101216A1
Автор: Heinzig Whitney, Teo Carlie
Принадлежит:

A dialysis access is disclosed. The dialysis access includes a tubular base, an initial access structure, a persistent access structure, and a seal. The initial access structure is retractably disposed within an interior of the tubular base and includes a piercing tip. The initial access structure is retractable from an extended position to a withdrawn position. The persistent access structure is coupled to the tubular base and surrounds and extends along a length of the initial access structure with the piercing tip exposed while in the extended position. The persistent access structure remains stationary relative to the base with the initial access structure in the withdrawn position. The seal is disposed within the tubular base to surround the initial access structure while in the extended position and to isolate the initial access structure from a fluid flow path within the tubular base while in the withdrawn position. 1. A dialysis access comprising:a tubular base;an initial access structure retractably disposed within an interior of the tubular base, the initial access structure comprising a piercing tip at a distal end of the initial access structure, the initial access structure retractable from an extended position to a withdrawn position relative to the tubular base;a persistent access structure coupled to the tubular base, the persistent access structure surrounding and extending along a length of the initial access structure with the piercing tip exposed while the initial access structure is in the extended position, wherein the persistent access structure remains stationary relative to the base with the initial access structure in the withdrawn position; anda seal disposed within the tubular base, the seal being configured to surround the initial access structure while the initial access structure is in the extended position and to isolate the initial access structure from a fluid flow path within the tubular base while the initial access structure is ...

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Номер записи: 48
28-04-2016 дата публикации

HEMODIALYSIS DOUBLE LUMEN NEEDLE ANGIO CATHETER

Номер: US20160113677A1
Автор: Parent Theresa Ann
Принадлежит:

An angio catheter for hemodialysis is disclosed. The angio catheter comprises a steel cylindrical element for introducing into a patient's blood vessel. The invention also includes a needle including a first lumen and a second lumen, each lumen hermetically separate from the other, wherein the needle is located within the cylindrical element. The invention further includes a first tube for supplying fluid to or from the first lumen and a second tube for supplying fluid to or from the second lumen, wherein fluid may flow within the first lumen independently from fluid flowing within the second lumen. The invention also includes a first flange extending perpendicularly from both sides of the cylindrical element and a second flange extending perpendicularly from both sides of an offset neck of the needle. 1. An angio catheter , comprising:a steel cylindrical element for introducing into a patient's blood vessel;a needle including a first lumen and a second lumen, each lumen hermetically separate from the other, wherein the needle is located within the cylindrical element;a first tube for supplying fluid to or from the first lumen;a second tube for supplying fluid to or from the second lumen;a first flange extending perpendicularly from both sides of the cylindrical element;a second flange extending perpendicularly from both sides of an offset neck of the needle;andwherein fluid may flow within the first lumen independently from fluid flowing within the second lumen.2. The angio catheter of claim 1 , wherein the needle comprises a first end opposing a second end claim 1 , the needle further comprising at least one opening proximate to said second end allowing access into the first lumen.3. The angio catheter of claim 2 , wherein the needle further includes a barrier at its second end preventing access into the second lumen claim 2 , said second end having a slot behind said barrier allowing access into said second lumen claim 2 , and the needle being tapered at its ...

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Номер записи: 49
28-04-2016 дата публикации

METHOD AND APPARATUS FOR THE DIALYSIS OF BLOOD

Номер: US20160114093A1
Автор: Ravenscroft Adrian, Woods Donald
Принадлежит:

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 ...

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Номер записи: 50
26-04-2018 дата публикации

METHOD AND APPARATUS FOR THE DIALYSIS OF BLOOD

Номер: US20180110915A1
Автор: Ravenscroft Adrian, Woods Donald
Принадлежит:

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 ...

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Номер записи: 51
10-07-2014 дата публикации

Chronic Access System for Extracorporeal Treatment of Blood Including a Continuously Wearable Hemodialyzer

Номер: US20140194804A1
Автор: Lande Arnold J.
Принадлежит:

A patient wearable, continuously operating extracorporeal pump apparatus which accesses the patient's arterial venous pressure differential by applying external pressure to a subcutaneous graft that has been cannualized to modulate blood flow through an extracorporeal circuit and to drive the pump for delivering a medicament, such as an anticoagulant, to the site of an intravenous cannula to prevent clogging thereof and also to move a dialysate through a circuit, including a dialyzer and a dialysate rejuvenating cartridge, whereby kidney failure can be treated without recourse to prior art hemodialysis machines found in most treatment facilities. With slight modification, the present invention can be used to remove excess fluids from CHF patients, to remove toxins from the blood in those suffering from liver failure and to facilitate administration of insulin to diabetics and/or glucose to those having hypoglycemia. 151-. (canceled)52. A method for obtaining access to a patient's arteriovenous pressure differential and extracorporeal blood flow comprising the steps of:(a) selecting a venous segment in the patient's forearm and debranching the selected venous segment and occluding and transecting the distal end thereof;(b) anastomosing the remaining end portion of the transected debranched vein to a selected artery in the patient's forearm, creating a fistula;(c) inserting a first needle cannula percutaneously into the debranched vein segment for accessing AV pressure differential and extracorporeal blood flow and inserting a second needle percutaneously into the debranched vein for return of the extracorporeal blood flow to the patient's circulation; and(d) sequentially applying compression to the forearm between the first and second needle cannulas sufficient to substantially occlude blood flow through the debranched vein segment and thereby establishing the pressure whereby when the compression is being applied, the needle cannula is exposed to arterial pressure ...

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Номер записи: 52
07-05-2015 дата публикации

MULTILUMEN CATHETERS AND METHOD OF MANUFACTURING

Номер: US20150122417A1
Автор: Appling William M., Beyer Theodore J.
Принадлежит: ANGIODYNAMICS, INC.

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 ...

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Номер записи: 53
05-05-2016 дата публикации

Split-Tip Catheter Including Lateral Distal Openings

Номер: US20160121040A1
Автор: Gregersen Colin S., Moehle Ryan T., Patterson Ryan C., Walton Mark E., Woodley William D.
Принадлежит:

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 ...

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Номер записи: 54
05-05-2016 дата публикации

Pressure Activated Valve with High Flow Slit

Номер: US20160121041A1
Автор: DiCarlo Paul D., WEAVER KARLA
Принадлежит: ANGIODYNAMICS, INC.

A pressure actuated valve for controlling the flow of fluid through a medical device, the valve comprises a housing including a lumen extending therethrough and a flow control membrane extending across the lumen to control the flow of fluid through the lumen. The membrane includes a plurality of slits extending therethrough so that, when the membrane is acted upon by a pressure of at least a threshold magnitude, the slits open to permit flow through the lumen and, when not acted upon by a pressure of at least the predetermined magnitude, the slits are maintained closed by a biasing force applied thereto by the membrane to prevent flow through the lumen. Each of the slits extends between end portions thereof along a curve wherein a distance between a first end portion of a first one of the slits and a first end portion of a second one of the slits is a minimum distance between the first and second slits. 119-. (canceled)20. A catheter for providing fluid access to a site within a human body , the catheter comprising:a proximal end, a distal end, and a first lumen extending therebetween, a housing including a housing lumen in fluid communication with the first lumen, and a valve membrane extending across the housing lumen, the valve member having a short axis and a long axis, the valve membrane comprising:a first slit and a second slit disposed about a long axis of the valve membrane and a third slit disposed between the first slit and the second slit, wherein the third slit extends in substantially the same direction as the first slit and the second slit, wherein the first slit and the second slit both traverse a short axis, and wherein the short axis bisects the long axis.21. The catheter of claim 20 , wherein the first claim 20 , second claim 20 , and third slit do not traverse the long axis.22. The catheter of claim 20 , wherein the first slit and the second slit both open when acted upon by a pressure of at least a predetermined threshold.23. The catheter of ...

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Номер записи: 55
03-05-2018 дата публикации

A CONDUIT ARRANGEMENT

Номер: US20180117238A1
Автор: ALLAN William David, DUNLOP Craig Maxwell, HOUSTON John Graeme
Принадлежит: VASCULAR FLOW TECHNOLOGIES LIMITED

A conduit arrangement () comprises distal and proximal ends () and two tubular lumens (). Each tubular lumen () comprises a longitudinal axis extending between the distal and proximal ends () and independently permits fluid communication between the distal and proximal ends (). The interior of each of the two tubular lumens is made from a biocompatible material. At least a portion of at least one tubular lumen () is capable of imparting helical flow on fluid passing through said portion of the tubular lumen (). The helical flow is spiral laminar flow. 1. A conduit arrangement comprising distal and proximal ends and two tubular lumens , wherein each tubular lumen comprises a longitudinal axis extending between the distal and proximal ends and independently permits fluid communication between the distal and proximal ends and wherein the interior of each of the two tubular lumens is made from a biocompatible material , wherein at least a portion of at least one tubular lumen is capable of imparting helical flow on fluid passing through said portion of the tubular lumen and wherein said helical flow is spiral laminar flow.2. The conduit arrangement according to claim 1 , wherein the conduit arrangement comprises a tubular conduit and a septum which divides the tubular conduit parallel to its longitudinal axis so as to define the two tubular lumens.3. The conduit arrangement according to claim 2 , wherein the septum extends substantially across a diameter of the tubular conduit.4. The conduit arrangement according to claim 1 , wherein the conduit arrangement comprises a tubular conduit and wherein the two tubular lumens are located side-by-side in said tubular conduit.5. The conduit arrangement according to claim 1 , wherein the conduit arrangement comprises a tubular conduit comprising an outer wall claim 1 , which defines an outer tubular lumen claim 1 , and an inner wall claim 1 , which defines an inner tubular lumen claim 1 , and wherein the outer tubular lumen and ...

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Номер записи: 56
07-05-2015 дата публикации

Catheter device

Номер: US20150126972A1
Автор: Adrian C. Ravenscroft
Принадлежит: PHASE ONE MEDICAL LLC

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.

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Номер записи: 57
25-04-2019 дата публикации

PORTABLE HEMODIALYSIS MACHINE AND DISPOSABLE CARTRIDGE

Номер: US20190117866A1
Автор: CORDER RODNEY, GIORDANO RENATO
Принадлежит:

A portable hemodialysis system is provided including a disposable cartridge and a reused dialysis machine. The disposable cartridge includes a dialyzer, and a dialysate flow path and a blood flow path which flow in opposing directions through the dialyzer. The disposable cartridge includes pressure and fluid flow sensors for measuring the pressure and fluid flow in the dialysate flow path and blood flow path. In addition, the disposable cartridge possesses pump actuators (but not pump motors) for pumping dialysate and blood through their respective flow paths. Preferably, the disposable cartridge includes a filter for removing waste products from dialysate. 1. A disposable cartridge for hemodialysis comprising:a blood flow path;a dialysate flow path, isolated from the blood flow path;a dialyzer in said blood flow path and said dialysate flow path, said dialyzer including a semipermeable membrane that separates said blood flow path and said dialysate flow path;a first pump actuator connected to said dialysate flow path upflow from said dialyzer which pumps dialysate through said dialysate flow path; anda second pump actuator connected to said dialysate flow path downflow from said dialyzer which pumps dialysate through said dialysate flow path.2. The disposable cartridge for hemodialysis of further comprising:a flow sensor connected to said dialysate flow path which measures the fluid flow within said dialysate flow path;a pressure sensor connected to said dialysate flow path which measures the pressure within said dialysate flow path; andcartridge electrical terminals electrically connected to said disposable cartridge's flow sensor and said disposable cartridge's pressure sensor, said cartridge electrical terminals located upon the exterior of the disposable cartridge so as to engage and electrically connect, or disengage and electrically disconnect, to electrical terminals of a reusable dialysis machine.3. The disposable cartridge for hemodialysis of further ...

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Номер записи: 58
25-04-2019 дата публикации

Dual-tip hemodialysis catheter

Номер: US20190117935A1
Автор: Michael Gabriel Tal
Принадлежит: PRISTINE ACCESS TECHNOLOGIES LTD

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.

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Номер записи: 59
25-04-2019 дата публикации

A male fluid connector, a female fluid connector and a fluid connection system comprising the same

Номер: US20190117950A1
Автор: Ola Carlsson
Принадлежит: GAMBRO LUNDIA AB

A male fluid connector, a female fluid connector, and a connection system comprising the connectors. The connection system comprises a male connector and a female connector that both are modified such that they cannot be engaged. The connection system removes the risk of unintentional connection of the two modified connectors not intended to be connected but still allows connection of the two modified connectors to other non-modified connectors.

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Номер записи: 60
16-04-2020 дата публикации

Device and Method for Atraumatic and Percutaneous Formation of an Arteriovenous Fistula

Номер: US20200114060A1
Автор: Vartanian Shant
Принадлежит: The Regents of the University of California

Provided herein are novel devices for the formation of arteriovenous fistulas, which may aid subjects in need of hemodialysis. The novel devices are provided in a non-surgical procedure, greatly decreasing the cost and increasing the convenience of placing an arteriovenous fistula. The devices are atraumatic, and consist of a sutureless anastomosis device and conduit. Methods and tools for placing the devices in vivo are disclosed, including a magnetic-assisted method. 1. An implant for the creation of a fistula between a first and a second blood vessel , the implant having a longitudinal axis from a distal to a proximal end , the implant comprisinga sutureless anastomosis device comprising a first set of hands and a second set of hands;wherein each hand comprises a body extending at an angle from the longitudinal axis of the implant;wherein each hand comprises a resilient material such that the hand may be deflected under tension to a compact orientation substantially parallel to the longitudinal axis of the implant;wherein each of the first set of hands and the second set of hands is connected to and arranged around an annular structure such that the first set of hands forms a first flange and the second set of hand forms a second flange, wherein the flanges are separated by a space along the longitudinal axis of the implant;wherein the implant further comprises a conduit comprising a tubular structure comprising a lumen, connected at its distal end circumferentially around the proximal end of the annular structure, wherein the conduit comprises a scaffolding material enclosed in or surrounded by a covering of biocompatible material.2. The implant of claim 1 , whereinthe sutureless anastomosis device comprises 4-12 hands.3. The implant of claim 1 , whereinthe hands are substantially perpendicular to the longitudinal axis of the implant.4. The implant of claim 1 , whereinthe hands comprise a material selected from the group consisting of nitinol, stainless steel, ...

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Номер записи: 61
14-05-2015 дата публикации

BIO-COMPATIBLE CATHETER

Номер: US20150133846A1
Автор: Kerr Marshall
Принадлежит:

A bio-compatible lumen bearing device such as a catheter formed of a polymeric material having a titanium surface bonded to the underlying exposed catheter surface. The titanium surface is employed in patients to improve bio-compatibility and enhance lubricity during insertion and removal. 1. A lumen bearing component comprising:a lumen defined by an interior surface of a surrounding wall having an exterior surface and additionally having end wall surfaces communicating between said interior surface and said exterior surface, said lumen formed of polymeric material being flexible as needed for intravenous insertion and navigation; anda titaniumized surface formed completely upon all of said exterior surface of said surrounding wall;said titaniumized surface providing means for increased lubricity and bio-compatibility with a body of a patient in which said catheter is positioned;said titaniumized surface being the only surface formed completely on all of said exterior surface, and said titaniumized surface being composed exclusively of titanium.2. The lumen bearing component of further comprising:said titaniumized surface completely covering all of said end wall surfaces.3. The lumen bearing component of further comprising:a second layer said titaniumized surface also completely covering all of said interior surface.4. The lumen bearing component of further comprising:a second layer of said titaniumized surface also completely covering all of said interior surface.5. The lumen bearing component of wherein:said titaniumized surface covering said exterior surface is formed in said first layer having a thickness substantially being in a range between 20-60 nm; andforming said thickness of said first layer within said range providing means for maintaining a flexibility of the underlying polymeric material.6. The lumen bearing component of wherein:said titaniumized surface covering said exterior surface is formed in a first layer having a thickness substantially being in ...

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Номер записи: 62
01-09-2022 дата публикации

Split-Tip Catheter Including Lateral Distal Openings

Номер: US20220273858A1
Автор: Gregersen Colin S., Moehle Ryan T., Patterson Ryan C., Walton Mark E., Woodley William D.
Принадлежит:

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 ...

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Номер записи: 63
23-04-2020 дата публикации

AV Flow Restrictors

Номер: US20200121845A1
Автор: Batiste Stan
Принадлежит:

A shunt comprising a flexible tube having a first, and a second end, and a central opening, having a first diameter that extends from the first end to the second end. The shunt also includes one or more restrictor bands having a second diameter around the flexible tube. The one or more restrictor bands are located between the first end and the second end of the flexible tube and the second diameter is less than the first diameter such that the restrictor band forms a restriction. The restrictor band is expandable between a first position and a second position. The restrictor band may have fracturable sections configured to fracture in responds to pressure thereby increasing a diameter of the one or more restrictor bands to a diameter greater than the second diameter. The one or more restrictor bands may comprise restrictor bands of at least two different inner diameters. 1. A shunt comprising:a flexible tube having a first end and a second end, the flexible tube having a central opening having a first diameter, the opening extending from the first end to the second end; andone or more restrictor bands having a second diameter around the flexible tube, the one or more restrictor bands located between the first end and the second end of the flexible tube, wherein the second diameter is less than the first diameter.2. The shunt of claim 1 , wherein the shunt is an arterial venous shunt.3. The shunt of claim 1 , wherein the restrictor band is expandable between a first position and a second position.4. The shunt of claim 1 , wherein the restrictor band further comprises sections that are configured to fracture in responds to pressure thereby increasing a diameter of the one or more restrictor bands to a diameter greater than the second diameter.5. The shunt of claim 1 , wherein the one or more restrictor bands comprise restrictor bands of at least two different inner diameters.6. A stent with an expandable restriction comprising:a stent having an inlet end and an outlet ...

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Номер записи: 64
21-05-2015 дата публикации

NON-TEMPORARY CENTRAL CENOUS CATHETER FOR USE IN HAEMODIALYSIS

Номер: US20150141925A1
Автор: Bandera Andrea
Принадлежит:

The present invention describes a long-term central venous catheter (CVC) for use in haemodialysis treatments with two cuffs in the end section to be positioned in the subcutaneous tunnel. 1515251575258. A non-temporary central venous catheter (CVC) for use in haemodialysis treatments characterised in that , in the end section to be positioned in the subcutaneous tunnel , it comprises two cuffs () and () spaced apart by 3-8 cm so that cuff () is positioned within the subcutaneous tunnel in the proximity of the exit site () of the subcutaneous tunnel and cuff () is positioned within the subcutaneous tunnel in the proximity of the access point () to the catheterised central vein.25253. The CVC according to claim 1 , wherein cuff () is spaced apart from tip () of the CVC by a distance (x) in the range between 18 and 26 cm.3. The CVC according to claim 2 , wherein:if for the right side, distance (x) is in the range between 19 and 20 cm;if for the left side, distance (x) is in the range between 23 and 25 cm.45152. The CVC according to claim 1 , wherein the two cuffs () and () are made of polyethylene terephthalate fibre or other biocompatible material that causes a fibrotic reaction with the subcutaneous tissue.55152. The CVC according claim 1 , wherein the two cuffs () and () have claim 1 , independently of each other claim 1 , a length in the range between 5-10 mm and thickness in the range between 0.5 and 2.0 mm.6. The CVC according to claim 4 , wherein the cuffs have a length of 8 mm and a thickness of 1.0 mm.7. A kit comprising a CVC according to . The present invention relates to the field of medical and surgical devices and in particular to a long-term or tunnelled Central Venous Catheter (CVC) which can remain in place for long periods of time (months or years).The Central Venous Catheter (CVC) is a device which is placed into a large vein in order to carry out haemodialysis treatment. It is used when it is not possible to perform a vascular access using the ...

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Номер записи: 65
18-05-2017 дата публикации

SHEATH

Номер: US20170136218A1
Автор: Gordon Gregory
Принадлежит:

The present application includes a sheath that is suitable for use in a variety of medical procedures. In one or more implementations, the sheath includes a shunt member, and a curvable portion. The curvable portion may be configured in various orientations to facilitate an intervention, such as a hemodialysis intervention, or the like, by an operator. The curvable portion may be configured to bend between a substantially straight configuration and a curved configuration. In implementations, the sheath may be configured to have detachable and/or interchangeable components (e.g., shunt member, curvable portion, etc.). 120-. (canceled)21. A system configured to receive an interventional tool , the system comprising:a detachable shunt member positionable through a perforation in a side wall of an anatomical vessel, the detachable shunt member including: a distal opening configured to reside in the anatomical vessel, and a connection member that resides external to the anatomical vessel and configured to receive an interventional tool therethrough; anda detachable sheath tube matable to the connection member, the detachable sheath tube including: a distal end detachably mated with the connection member of the shunt member, and a proximal end opposite from the distal end, and a tube wall retainable in a curved configuration in which a proximal portion of the detachable sheath tube is transverse to the detachable shunt member when the detachable sheath tube is mated to the connection member of the detachable shunt member, the proximal end of the detachable sheath tube configured to receive the interventional tool;wherein an internal access path defined through the detachable sheath tube, the shunt member, and the anatomical vessel is configured to movably receive an interventional tool.22. The system of claim 21 , wherein the proximal end of the detachable sheath tube is coupled with a septum hub claim 21 , the septum hub configured to receive the interventional tool.23. ...

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Номер записи: 66
09-05-2019 дата публикации

GARMENT WITH DIALYSIS CATHETER ACCESS AND DIALYSIS TUBE MANAGEMENT SYSTEM

Номер: US20190134351A1
Автор: Poutre Steven J.
Принадлежит:

A garment includes a right side chest area multi-directional opening and a left side chest area multi-directional opening. The right side chest area multi-directional opening includes a first substantially vertical disengagement area and a first substantially horizontal disengagement area. The left side chest area multi-directional opening includes a second substantially vertical disengagement area and a second substantially horizontal disengagement area. 1. A garment comprising:a right side chest area multi-directional opening; anda left side chest area multi-directional opening; a first substantially vertical disengagement area, and', 'a first substantially horizontal disengagement area;, 'said right side chest area multi-directional opening including,'} a second substantially vertical disengagement area, and', 'a second substantially horizontal disengagement area., 'said left side chest area multi-directional opening including,'}2. The garment as claimed in claim 1 , wherein said first substantially vertical disengagement area of said right side chest area multi-directional opening includes a first zipper system;said second substantially vertical disengagement area of said left side chest area multi-directional opening includes a second zipper system.3. The garment as claimed in claim 1 , wherein said first substantially vertical disengagement area of said right side chest area multi-directional opening includes a first latch and hook system;said second substantially vertical disengagement area of said left side chest area multi-directional opening includes a second latch and hook system.4. The garment as claimed in claim 1 , wherein said first substantially vertical disengagement area of said right side chest area multi-directional opening includes a first plurality of snaps;said second substantially vertical disengagement area of said left side chest area multi-directional opening includes a second plurality of snaps.5. The garment as claimed in claim 1 , ...

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Номер записи: 67
30-04-2020 дата публикации

DUAL RESERVOIR HEMODIALYSIS SYSTEM

Номер: US20200129686A1
Автор: KHAWAR OSMAN, POPPE CLAYTON
Принадлежит: DIALITY INC.

A portable hemodialysis system is provided including a dialyzer, a closed loop blood flow path which transports blood from a patient to the dialyzer and back to the patient, and a closed loop dialysate flow path which transports dialysate through the dialyzer. In addition, the hemodialysis system includes two reservoirs which can be alternately placed in the dialysis flow path using various controllable fluid valves. The hemodialysis system may include a sorbent filter in the dialysate flow path which filters used dialysate. Alternatively, the filter may be positioned within a separate closed loop filter flow path which is isolated from the blood flow path and dialysate flow path. For this embodiment, the hemodialysis system includes additional controllable fluid valves which selectively connect the filter flow path to the reservoir which is not currently providing dialysis treatment to a patient. 2. The hemodialysis system of further comprising:a filter which removes uremic toxins from water;a closed loop filter flow path isolated from said blood flow path and said dialysate flow path, said filter flow path being a conduit for transporting a dialysate from said first reservoir or said second reservoir to said filter and back to the same first reservoir or second reservoir.3. The hemodialysis system of further comprising a pump and a source of reagents claim 2 , both connected to said filter flow path.4. The hemodialysis system of further comprising:a supply of fresh dialysate connected to both said first reservoir and said second reservoir;fresh dialysate flow path connected to said supply of fresh dialysate, and said first reservoir and said second reservoir; anda drain flow path connected to both said first reservoir and said second reservoir;said processor connected to said supply of fresh dialysate and said drain flow path, said processor is programmed to drain the dialysate through said drain flow path and supply fresh dialysate to said first reservoir through ...

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Номер записи: 68
30-04-2020 дата публикации

Interface Device For Performing Hemodialysis

Номер: US20200129689A1
Автор: JEAN ERIC, Missaire Fabrice, Thuaudet Sylvain
Принадлежит: UBIPLUG

Interface device between a hemodialysis machine and venous and arterial tubes, this interface device comprising: a first port adapted to be connected to an output port of the hemodialysis machine; a venous port to inject blood into the venous tube; said interface device comprises: a second port adapted to be connected to an input port of the hemodialysis machine; an arterial port for receiving blood from the patient from the arterial tube, the interface device being further adapted to selectively allow or prohibit the passage of blood between the first and second ports and the venous and arterial ports respectively. 1. Interface device between a hemodialysis machine and at least one venous tube intended to be connected to a patient's circulatory system for transferring blood from the hemodialysis machine to the circulatory system , this interface device comprising:a first port adapted to be connected to an output port of the hemodialysis machine;a venous port to inject blood into the venous tube;the interface device being adapted to selectively adopt a first configuration in which the passage of blood between the first port and the venous port is prohibited and a second configuration in which the first port is connected to the venous port to allow blood to pass from the first port to the venous porter), characterized in that the interface device is also adapted to form an interface between the hemodialysis machine and an arterial tube for connection to said patient's circulatory system to transfer blood from the circulatory system to the hemodialysis machine, said interface device also comprising:a second port adapted to be connected to an input port of the hemodialysis machine;an arterial port for receiving blood from the patient via the arterial tube, the interface de-vice being further adapted to prohibit the passage of blood between the second port and the arterial portwhen the device is in its first configuration and to allow the passage of blood between the ...

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Номер записи: 69
30-04-2020 дата публикации

Catheter Assembly Including a Multi-Lumen Configuration

Номер: US20200129729A1
Автор: Barron William R., Moehle Ryan T., Oborn Kelli D.
Принадлежит:

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 method for making an elongate catheter tube , the method comprising: an outer surface having a flattened oval cross-sectional shape with opposing flat sides;', 'a first lumen and a second lumen separated by a septum having an hourglass cross-sectional shape; and', 'a third lumen between the first lumen and the second lumen, the third lumen configured to withstand pressures associated with power injection of a fluid therethrough., 'extruding an extrusion material to define2. The method for making according to claim 1 , wherein the extruding further comprises defining the first lumen and the second lumen to each have a cross-sectional shape including:a minor arc portion adjacent the septum;a major arc portion adjacent an outer wall of the catheter tube; androunded first and second corners interposed between the minor arc portion and the major arc portion.3. The method for making according to claim 2 , wherein the extruding comprises defining the third lumen to be positioned adjacent the minor arc portion of ...

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Номер записи: 70
10-06-2021 дата публикации

CHARGED GRAFTS AND METHODS FOR USING THEM

Номер: US20210170077A1
Автор: RYAN Timothy J.
Принадлежит:

A system for preventing thrombosis in an implantable medical device includes an implantable medical device sized for implantation at least partially within a patient's body. The device includes an at least partially electrically conductive portion that is disposed within a patient's body upon implantation, an electrode coupled to the electrically conductive portion of the device; and a power source coupled to the electrode. The power source provides a negative electric charge to the at least partially electrically conductive portion for an indefinite period of time. The device may be configured to resist thrombosis, infection, and/or undesired tissue growth via the charged conductive portion once implanted. Exemplary embodiments of the implantable medical device include a hemodialysis vasculature graft, a dialysis catheter, a coronary artery, and a heart valve. 1. A system for preventing at least one of infection , thrombosis , and undesired tissue growth in an implantable medical device , comprising:an implantable medical device sized for implantation at least partially within a patient's body, the device comprising an at least partially electrically conductive portion that is disposed within a patient's body upon implantation; anda power source coupled to the electrode for providing an electric charge to the at least partially electrically conductive portion.234-. (canceled)35. A method for preventing thrombosis on an implantable device in a body , the method comprising:implanting the device within a patient's body, the device comprising an at least partially electrically conductive portion, and a power source coupled to the at least partially electrically conductive portion; andapplying a negative electrical charge to the at least partially electrically conductive portion for an indefinite time to prevent thrombosis adjacent the at least partially electrically conductive portion.36. The method of claim 35 , wherein implanting the device comprises:implanting an ...

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Номер записи: 71
10-06-2021 дата публикации

CANNULAS AND CANNULA ASSEMBLIES FOR HEMODIALYSIS

Номер: US20210170091A1
Автор: SANCHEZ Carlos G.
Принадлежит:

A cannula assembly comprises a cannula including a first portion, and a second portion extending from a distal end of the first portion, the second portion being more flexible than the first portion and configured to be inserted into a fistula vein of a patient. A needle is removably disposed in the cannula and configured to be displaced axially within the cannula. 1. A cannula assembly , comprising: a first portion, and', 'a second portion extending from a distal end of the first portion, the second portion being more flexible than the first portion and configured to be inserted into a fistula vein of a patient; and, 'a cannula comprisinga needle removably disposed in the cannula and configured to be displaced axially within the cannula.2. The cannula assembly of claim 1 , wherein a wall of the cannula has a first thickness at the first portion and a second thickness at the second portion claim 1 , the second thickness being less than the first thickness.3. The cannula assembly of claim 1 , wherein the first portion of the cannula is formed from a first material and the second portion of the cannula is formed from a second material claim 1 , the second material being more flexible than the first material.4. The cannula assembly of claim 1 , wherein one or more apertures extend radially through a wall of the second portion at a distal end of the second portion.5. The cannula assembly of claim 1 , further comprising:a hub coupled to a proximal end of the first portion of the cannula, the hub defining a fluid conduit configured to deliver a fluid into or receive a fluid from the cannula,wherein the needle extends through the hub and is axially displaceable through the hub.6. A cannula assembly comprising: a first channel,', 'a second channel disposed adjacent to the first channel and fluidly separated from the first channel by a wall, and', 'a tip portion located at a distal end of the first channel and/or the second channel and configured to be inserted into a ...

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Номер записи: 72
25-05-2017 дата публикации

Dual Lumen Retrograde Catheter and Hub Attachment

Номер: US20170143890A1
Автор: Nardeo Mahase
Принадлежит: VascuTech Medical LLC

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 ...

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Номер записи: 73
14-08-2014 дата публикации

Split-Tip Catheter Including Lateral Distal Openings

Номер: US20140228742A1
Автор: Gregersen Colin S., Moehle Ryan T., Patterson Ryan C., Walton Mark E., Woodley William D.
Принадлежит: C. R. BARD, INC.

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 ...

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Номер записи: 74
15-09-2022 дата публикации

Method of coating a transdermal catheter with an antimicrobial agent

Номер: US20220288376A1
Автор: Keith J. Modert, Matthew Case Ziebol, Robert J. Ziebol
Принадлежит: ICU Medical Inc

Systems, methods, and articles for providing an antimicrobial composition to the proximal elements of a trans-dermal catheter and into the lumen of the transdermal catheter are disclosed. In an embodiment, an antimicrobial composition on surface a cap element transfers antimicrobial to the proximal end of the transdermal catheter. The system comprises an elongate member configured for insertion into a lumen of a catheter, the elongate member containing an antimicrobial.

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Номер записи: 75
31-05-2018 дата публикации

CATHETER INSERTION APPARATUS

Номер: US20180147390A1
Автор: Braga Richard, Haarala Brett, Rainieri Christopher V., Tal Michael G.
Принадлежит:

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. ...

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Номер записи: 76
11-06-2015 дата публикации

PUNCTURE NEEDLE

Номер: US20150157359A1
Автор: Maruyama Yasuyo, Miwa Masamiki, Sasaki Masatomi, Shinzato Toru
Принадлежит:

The success rate of the insertion of a dull needle into a puncture hole is improved. A puncture needle is provided which is inserted into a puncture route that is formed to cover from a skin surface to a shunt vessel surface so as to expand an incision of a puncture hole formed in the shunt vessel surface. The puncture needle has an inclined end face that is inclined toward a front end of the needle, and a front end part of the inclined end face has an edge having no sharpness. Right and left side parts of the inclined end face which are contiguous with the front end part are respectively inclined outward, and side edges of the side parts are provided with cutting lines. 1. A puncture needle that is inserted into a puncture route formed to cover from a skin surface to a shunt vessel surface so as to expand an incision forming a puncture hole that is made in the shunt vessel surface , the puncture needle comprising:an inclined end face that is inclined toward a front end of the needle,wherein a front end part of the inclined end face constitutes an edge having no sharpness, andwherein right and left side edges of the inclined end face which are contiguous with the front end part are provided with cutting lines each having an edge angle from 5 degrees to 85 degrees.2. The puncture needle according to claim 1 , wherein right and left side parts of the inclined end face which are contiguous with the front end part are respectively inclined claim 1 , and side edges of the side parts are provided with the cutting lines.3. The puncture needle according to claim 2 , wherein the side parts are inclined so as to become lower in an outward direction.4. The puncture needle according to any of to claim 2 , wherein the edge angle of the cutting lines is from 15 degrees to 65 degrees.5. The puncture needle according to any of to claim 2 , wherein the front end part of the inclined end face is formed into an arc shape.6. The puncture needle according to claim 5 , wherein the front ...

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Номер записи: 77
09-06-2016 дата публикации

METHOD FOR CONTROLLING A BLOOD TREATMENT APPARATUS AND APPARATUSES

Номер: US20160158430A1
Автор: Chamney Paul, KOPPERSCHMIDT Pascal, Wehmeyer Wolfgang
Принадлежит:

The present invention relates to a method for controlling a blood treatment apparatus, with the conveying of blood using a blood pump, with the patient venous tubing clamp closed, until a predetermined volume of fluid has passed out of the blood tubing set through the membrane and into the dialysis fluid chamber. It also relates to a control and regulating apparatus and a treatment apparatus. It further relates to a computer program, a computer program product and a digital storage medium. 118-. (canceled)19. A method for at least one of controlling or regulating a blood treatment apparatus having a blood pump for conveying blood inside an extra-corporeal blood tubing set , the extra-corporeal blood tubing set comprising or connected with (i) an arterial section having an arterial needle and an arterial patient tubing clamp , (ii) a venous section having a venous needle and a venous patient tubing clamp , and (iii) a blood filter arranged between the arterial section and the venous section , the blood filter having a membrane which separates a blood chamber from a dialysis fluid chamber , the method comprising:when the venous patient tubing clamp is closed, conveying with a pump such as the blood pump or an ultra-filtration pump a fluid through the membrane out of the extra-corporeal blood tubing set and into the dialysis fluid chamber.20. The method according to claim 19 , wherein the fluid is conveyed until a predetermined fluid volume has passed into the dialysis fluid chamber or at least until a sensor signal transmits or detects that blood has reached a predetermined location.21. The method according to claim 20 , further comprising:reducing or stopping the conveying of the fluid after the predetermined fluid volume has passed into the dialysis fluid chamber or at least when the sensor signal transmits that blood has reached the predetermined location.22. The method according to claim 20 , wherein the predetermined fluid volume is a volume of a priming solution ...

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Номер записи: 78
07-06-2018 дата публикации

DIALYSIS CATHETER

Номер: US20180154062A1
Автор: DeFonzo Stephan A., Leedle John D.
Принадлежит: Argon Medical Devices, Inc.

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 ...

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Номер записи: 79
22-09-2022 дата публикации

Non-removable connection system

Номер: US20220296870A1
Автор: Guillaume Vernin
Принадлежит: Gambro Industries SAS, GAMBRO LUNDIA AB

Non-removable connection system (100) for a medical apparatus comprising a first connector (1) comprising a fluid coupling portion (2), a second connector (11) comprising a respective fluid coupling portion (12) connectable to the fluid coupling portion (2) of the first connector (1), wherein the second connector (11) comprises a hooking portion (13) and at least one locking projection (14). The non-removable connection system (100) also comprises a collar (20) coupled to the first connector (1) and comprising a respective hooking portion (23) engageable to the hooking portion (13) of the second connector (11) through an engagement rotation (ER), wherein in a engaged configuration the hooking portions (23, 13) prevent axial removal of the collar (20) from the second connector (11). The collar (20) further comprises respective locking projections (24) engageable to the locking projections (14) of the second connector (11) through the engagement rotation; in a coupled configuration the locking projections (24, 14) prevent a disengagement rotation of the collar (20) with respect to the second connector (11).

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Номер записи: 80
29-09-2022 дата публикации

APPARATUS AND METHOD FOR IMPLANTING AN ARTERIOVENOUS GRAFT

Номер: US20220304725A1
Автор: Busch Samantha, Chiossone Juan, Gage Shawn M., Knight Joseph, Lawson Peter, Lucas John, Nichols Craig, WALSH Brian
Принадлежит:

An apparatus for delivery of a vascular arteriovenous graft comprises a tubular sleeve defining an interior lumen adapted for being slidably positioned over a tunneling instrument. Once the tunneling instrument has been advanced to a desired subcutaneous anatomical location the shaft is removed while the sleeve remains in the tissue. The sleeve has a linear slit extending from a proximal end to a point intermediate the length of the sleeve. The lumen receives the distal end of the graft and at least a portion of a cannulation chamber such that the end of the sleeve progressively expands along the slit to provide an enlarged diameter for accommodating the cannulation chamber. Longitudinal force to the sleeve during removal of the sleeve from the tissue secures the graft in the sleeve by radial compression of the sleeve for pulling the graft and the sleeve through the tunnel and deploying the vascular graft. 2. The subcutaneous delivery apparatus as recited in claim 1 , wherein the sleeve is adapted to receive substantially the entire length of the shaft between the handle and the tip.3. The subcutaneous delivery apparatus as recited in claim 1 , wherein the sleeve is uniformly tapered from the proximal end to the distal such that distal end has a reduced diameter from the proximal end.4. The subcutaneous delivery apparatus as recited in claim 1 , wherein the slit is linear.5. The subcutaneous delivery apparatus as recited in claim 1 , wherein the sleeve comprises an enlarged diameter portion adjacent the proximal end claim 1 , the enlarged diameter portion of the sleeve adapted for receiving the cannulation chamber.7. The subcutaneous implantation apparatus as recited in claim 6 , wherein the sleeve is configured to receive substantially the entire length of the shaft between the handle and the tip.8. The subcutaneous implantation apparatus as recited in claim 6 , wherein the sleeve is uniformly tapered from the proximal end to the distal such that distal end has a ...

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Номер записи: 81
15-06-2017 дата публикации

Catheter Assembly Including a Multi-Lumen Configuration

Номер: US20170165453A1
Автор: Christian W. Crook, Kelli D. Oborn, Ryan T. Moehle, William R. Barron
Принадлежит: CR Bard Inc

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.

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Номер записи: 82
29-09-2022 дата публикации

VASCULAR ARTERIOVENOUS GRAFT

Номер: US20220305183A1
Автор: Busch Samantha, Chiossone Juan, Gage Shawn M., Knight Joseph, Lawson Peter, Nichols Craig, WALSH Brian
Принадлежит:

A cannulation chamber is provided for use with an arteriovenous graft including a flexible conduit. The cannulation chamber comprises an elongated body defining an annular passageway having a longitudinal axis extending between a first end and a second end. The body receives and surrounds the conduit in the passageway. The body comprises a self-sealing material and a cannulation port that exposes the self-sealing material. A flexible resilient elongated back plate is embedded in the body of the cannulation chamber such that the back plate extends generally parallel with and may partially surround the passageway. The back plate is formed of a substantially rigid material such that when a needle is inserted through the cannulation port and the self-sealing material, the needle is inhibited or prevented from extending through the back plate. 2. The cannulation chamber as recited in claim 1 , wherein the body includes an outer layer surrounding the cannulation chamber.3. The cannulation chamber as recited in claim 2 , wherein the outer layer comprises ePTFE.4. The cannulation chamber as recited in claim 1 , wherein the back plate is planar.5. The cannulation chamber as recited in claim 1 , wherein a transverse cross-section of the back plate is c-shaped claim 1 , the back plate including a posterior wall and a pair of sidewalls extending from the posterior wall partially surrounding the passageway and defining an open anterior portion facing the cannulation port of the body.6. The cannulation chamber as recited in claim 1 , wherein the back plate comprises a plurality of independent identically shaped pieces being embedded in the body unconnected to and separate from adjacent pieces with spaces dose enough between the pieces to prevent passage of a needle.7. The cannulation chamber as recited in claim 1 , wherein the back plate comprises a plurality of independent identically shaped pieces being embedded in the body unconnected to adjacent pieces such that the adjacent ...

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Номер записи: 83
29-09-2022 дата публикации

Fluid access devices and methods

Номер: US20220305185A1
Автор: Anna Galperin, Barry Fulkerson, Jeremy BARRIBEAU
Принадлежит: UNIVERSITY OF WASHINGTON

Fluid access devices include a machine-side hydraulic circuit and a patient-side hydraulic circuit, and are configurable between a connected state and at least one disconnected state. In the connected state, fluid flows between the machine-side hydraulic circuit and the patient-side hydraulic circuit. In the disconnected state, fluid does not flow between the machine-side hydraulic circuit and the patient-side hydraulic circuit. In some disconnected states, fluid recirculates through at least one of the machine-side hydraulic circuit or the patient-side hydraulic circuit in the disconnected state.

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Номер записи: 84
29-09-2022 дата публикации

IMPLANTABLE VASCULAR ACCESS DEVICE

Номер: US20220305248A1
Автор: PECORARI Gianni
Принадлежит:

A vascular access device for haemodialysis permanently implantable in a patient having a pre-existing arteriovenous fistula or, alternatively, in a vein, an artery or between a vein and an artery, to create an artificial arteriovenous fistula and a vascular access healing device and a sterile package containing a single-use device of collecting and/or injecting blood usable in combination with the vascular access device. 1. A vascular access device for haemodialysis permanently implantable in a patient having an arteriovenous fistula , the vascular access device being made of a biocompatible and sterilisable material , and comprising:a relative first tubular element having a first and a second relative end, which are longitudinal, the first tubular element defining a first conduit which extends from the first to the second end;a relative second tubular element having a first and a second relative end which are longitudinal, and defining a second conduit which extends from the relative first to the second end; wherein the first end of the second tubular element is fixed to the first tubular element in an intermediate position between the first and the second end of the first tubular element, so that the second conduit is in fluid communication with the first conduit and so that the second end of the second tubular element is on a first side with respect to the first tubular element; andfirst fixing means comprising a first plurality of through-holes and being fixed to the first tubular element and/or second tubular element the first plurality of through-holes being arranged on the first side, with respect to the first tubular element, and at the second end of the second tubular element, wherein said vascular access device is conformed and dimensioned to be implantable in an arm of a patient having an arteriovenous fistula for haemodialysis with the first conduit interposed in series to the arteriovenous fistula, with respect to the blood flow therein, between a first ...

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Номер записи: 85
30-05-2019 дата публикации

Intravascular access device displacement alerting apparatus and method

Номер: US20190160219A1
Автор: Esther David, Guy LESHEM, La-Lin SHAO, Po-Yuan KUNG, Yoram YAGIL, Yuh-Jye Lee
Принадлежит: Ashkelon Academic College (registered Endowment), Fund For Medical Research Development Of Infrastructure & Health Services By Barzilai

Apparatus for intravascular access device displacement detection, where an intravascular access device is inserted into a blood vessel through the skin at an access site. The apparatus comprises electrodes located on either side of the intravascular access device which electrodes are mobile with the intravascular access device and attachable to the skin about the access site. The electrodes have a micro-current flow therebetween, which is sufficient to induce a current through the skin between the electrodes and the current persists as long as the electrodes are connected. If the device moves then one or more of the electrodes are disconnected and the micro-current is interrupted. A displacement alert device issues an alert signal upon interruption of the micro-current.

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Номер записи: 86
21-05-2020 дата публикации

ANTIMICROBIAL DEVICE COMPRISING A CAP WITH RING AND INSERT

Номер: US20200155794A1
Автор: Ziebol Robert J.
Принадлежит:

Systems, methods, and devices for providing an antimicrobial composition to the proximal elements of a transdermal catheter and into the lumen of the transdermal catheter are disclosed. In an embodiment, the device includes a cap configured to be removably secured to the hub, the cap comprising a ring member comprising first threads for engaging second threads on the hub of the transdermal catheter, the ring member having an opening through its interior; and an insert member secured within the opening of the ring member; wherein the insert member comprises an antimicrobial composition and the ring and insert member do not readily rotate with regard to one another. 1. A device for insertion into a hub on a proximal end of a transdermal catheter , the device comprising:a cap configured to be removably secured to the hub, the cap comprising:i) a ring member comprising first threads for engaging second threads on the hub of the transdermal catheter, the ring member having an opening through its interior;ii) an insert member secured within the opening of the ring member;wherein the ring member and the insert member are retained together such that the ring member and the insert member to do not readily rotate with respect to one another; andwherein the insert member comprises an antimicrobial composition.2. The device according to claim 1 , wherein the ring member and the insert member are joined by an interference fit.3. The device according to claim 1 , wherein the ring member and the insert member do not rotate with regard to one another.4. The device according to claim 1 , wherein the ring member and insert member are prevented from rotation by an interference fit between the ring member and the insert member.5. The device according to claim 1 , wherein the ring member and the insert member are configured to not substantially rotate with regard to one another when subjected to a torque of 3.2 lb.-in.6. The device according to claim 1 , wherein the ring member and the ...

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Номер записи: 87
11-09-2014 дата публикации

MEDICAL APPARATUS FACILITATING VASCULAR ANALYSIS AND TREATMENT

Номер: US20140257199A1
Автор: WU Steven
Принадлежит:

A medical apparatus generally includes a housing that translatably supports a grasping member and a motion control mechanism that is disengagable to permit motion of the grasping member relative to the housing. The housing is configured to support a flow inhibiting instrument when the grasping member is disposed in a retracted position. As such, the medical apparatus facilitates effective blockage of venous outflow from a hemodialysis access structure. In addition, the grasping member translates to a receiving position in which various vascular instruments may be inserted into the grasping member and to a holding position in which the grasping member firmly grasps the instrument. By holding the end of the apparatus opposite the instrument, a practitioner may position his or her hands outside of a medical imaging field and thereby reduce radiation exposure to the hands.

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Номер записи: 88
11-09-2014 дата публикации

Flushing stylet

Номер: US20140257244A1
Автор: Thomas M. Johnston, Ty Fairneny
Принадлежит: COVIDIEN LP

Systems and methods for use medical procedures including catheters and stylets are disclosed. The catheter includes a wall having an inner surface and an outer surface, the inner surface defining a lumen, and the wall defining at least one side opening from the outer surface to the inner surface. The stylet includes an elongate body defining a passage and at least one aperture in fluid communication with the passage. The stylet also includes a first blocking dam secured to the elongate body proximal to the at least one aperture and a second blocking dam secured to the elongate body distal to the at least one aperture. The stylet is movable within the lumen to a position in which the first and second blocking dams are, respectively, proximal and distal to the at least one side opening of the catheter and each of the first and second blocking dams is sealingly enaged with the inner surface of the catheter such that fluid introduced into the lumen, from the passage and through the at least one aperture of the stylet, is directed through the at least one side opening of the catheter.

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Номер записи: 89
06-06-2019 дата публикации

Solid-Body Catheter Including Lateral Distal Openings

Номер: US20190167888A1
Автор: Gregersen Colin S.
Принадлежит:

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 ...

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Номер записи: 90
28-06-2018 дата публикации

METHOD AND APPARATUS FOR THE DIALYSIS OF BLOOD

Номер: US20180177935A1
Автор: Ravenscroft Adrian, Woods Donald
Принадлежит:

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 ...

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Номер записи: 91
05-07-2018 дата публикации

Cannulation site selection apparatuses and methods

Номер: US20180185059A1
Автор: Gary Joseph Rowe
Принадлежит: Fresenius Medical Care Holdings Inc

In one aspect, a cannulation site selection apparatus includes a flexible member, a first marking on the flexible member, and an array of cannulation site selection markings on the flexible member, wherein the array of cannulation site selection markings is positioned at a set distance from the first marking, and wherein the cannulation site selection markings are spaced at set distances from one another.

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Номер записи: 92
14-07-2016 дата публикации

Vascular access ports and related methods

Номер: US20160199564A1
Автор: Mark A. Crawford, Nathaniel P. Young
Принадлежит: Vital Access Corp

A vascular access port can include a base that can be attached to a vessel and a body extending away from the base in at least a vertical direction. A height of the body in the vertical direction can be sufficiently small such that the entire port can be implanted subcutaneously in a patient. The port can include a guidance passageway that is at least partially defined by the body and can direct an access device into a vessel of a patient when the port is attached to the vessel. In some arrangements, the guidance passageway includes a funnel region that decreases in size from a proximal end of the guidance passageway toward a distal end of the guidance passageway that defines an opening through the bottom surface of the port.

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Номер записи: 93
27-06-2019 дата публикации

MEDICAL ACCESS PORTS, TRANSFER DEVICES AND METHODS OF USE THEREOF

Номер: US20190192769A1
Автор: Butziger John M., Murphy Ronald P., TALLARIDA Steven J.
Принадлежит:

An access port system, comprising an implantable access port, the access port including an access port body, an access port needle and a fluid flow passage provided within the body and the needle; wherein the needle is fully containable within the body, and the needle is exposable outside the body; wherein the needle is arranged within the body to penetrate outwardly of the subject from within the subject when the access port is implanted in the subject; wherein, when the needle is exposed outside the body, the fluid flow passage is open to a flow of a fluid within the access port in at least a direction entering the access port through the needle and thereafter exiting the access port from the body; and wherein the assess port includes at least one sensor configured to detect the fluid within the fluid flow passage. 1. An access port system , comprising:an implantable access port configured to be implanted into a subject, the access port including an access port body, an access port needle and a fluid flow passage provided within the access port body and the access port needle;wherein the access port needle is fully containable within the access port body, and the access port needle is exposable outside the access port body;wherein the access port needle is arranged within the access port body to penetrate outwardly of the subject from within the subject when the access port is implanted in the subject;wherein, when the access port needle is exposed outside the access port body, the fluid flow passage is open to a flow of a fluid within the access port in at least a direction entering the access port through the access port needle and thereafter exiting the access port from the access port body; andwherein the assess port includes at least one sensor configured to detect the fluid within the fluid flow passage.2. The access port system of claim 1 , wherein the access port includes a wireless communication device and a power supply claim 1 , the at least one sensor ...

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Номер записи: 94
18-06-2020 дата публикации

HEMODIALYSIS CATHETER SLEEVE

Номер: US20200188573A1
Автор: Babcock David E., Jelle Bruce, Kloke Timothy M., Kurdyumov Aleksey, La Ahn Tri, Lockwood Nathan, Maharaj Gary, McGonigle Joe, Olson Charlie, Slager Joram
Принадлежит:

A hemodialysis vascular access device includes a proximal end sized and shaped to sealably couple to a hemodialysis catheter, a movable structure coupled to the proximal end, a fixation structure coupled to the movable region and sized and shaped for fixation on a patient, an elongated sleeve coupled to the fixation structure and sized and shaped for insertion into a patient's vasculature, and a valve at a distal end of the internal lumen. When a hemodialysis catheter is inserted into the device and coupled to the proximal end, distal movement of the proximal end relative to the fixation structure biases a distal end of the hemodialysis catheter from a position inside the elongated sleeve through a valve out of the device and into the patient's blood. 128-. (canceled)29. A vascular access device comprising:a proximal orifice;a distal orifice; and a proximal portion defining a proximal end and a proximal lumen in communication with the proximal orifice;', 'a distal portion defining a distal end and a distal lumen in communication with the distal orifice;, 'an elongated catheter body defining'}the proximal lumen and distal lumen configured to receive a catheter through the proximal orifice and extending at least partially through the proximal lumen and distal lumen;the proximal end configured to be connected to the catheter;the proximal portion comprising a compressible section to allow the proximal orifice to be axially displaceable toward the distal portion from a first position to a second position, causing a distal end of the catheter to extend beyond the distal orifice when the proximal orifice is in the second position.30. The vascular access device of claim 29 , the compressible section comprising an air permeable membrane.31. The vascular access device of claim 30 , wherein the air permeable membrane permits air movement out of the device as the proximal orifice moves from the first position to the second position.32. The vascular access device of claim 30 , ...

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Номер записи: 95
09-10-2014 дата публикации

Detecting blood path disruption in extracorpreal blood processing

Номер: US20140298891A1
Автор: Bo Olde, Kristian Solem, Mattias Holmer
Принадлежит: GAMBRO LUNDIA AB

A device monitors a blood path from a blood vessel access of a human subject through an extracorporeal blood processing apparatus and back to the blood vessel access. A pumping device in the blood path is operable to pump blood through the blood path from the blood withdrawal device to the blood return device. The monitoring device obtains pressure data from a pressure sensor arranged upstream of the pumping device in the blood path, and processes the pressure data for detection of a disruption of the blood path downstream of the pumping device, e.g. caused by VND (Venous Needle Dislodgement). The disruption is detected by evaluating presence/absence of cross-talk pulses at the pressure sensor, where the cross-talk pulses originate from one or more pulse generators in the extracorporeal blood processing apparatus and have propagated on a propagation path in a direction downstream of the pumping device through the blood return device, the blood vessel access and the blood withdrawal device to the pressure sensor.

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Номер записи: 96
25-06-2020 дата публикации

DIALYSIS CATHETER

Номер: US20200197596A1
Автор: Okundaye Clifford
Принадлежит:

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;a clampless first limb leading to the inflow lumen;a clampless second limb leading to the outflow lumen; a fitting configured to attach to the first or second limb;', 'a needle guide configured to attach to the fitting, and configured to guide a needle into the first or second limb; and', 'at least one valve positioned between the needle guide and the fitting, configured to prevent fluid flow in one direction., 'a plurality of limb ports attached to the first limb and the second limb, the limb ports comprising2. The dialysis catheter of claim 1 , further comprising a cover for the needle guide configured to seal around a needle when it is inserted into the cover.3. The dialysis catheter of claim 1 , wherein the fitting comprises threads to mate with threads of the needle guide.4. The dialysis catheter of claim 1 , wherein the fitting comprises a first chamber to receive a duckbill of the valve and an outer edge to mate with a flange of the valve.5. The dialysis catheter of claim 4 , wherein the fitting further comprises a second chamber to mate with a lumen of the lumen tube and a transition region between the first chamber and the second chamber.6. The dialysis catheter of claim 1 , wherein the limb port attached to the first limb leading to the inflow lumen comprises a venous limb port.7. The dialysis catheter of claim 1 , wherein the limb port attached to the second limb leading to the outflow lumen comprises an arterial limb port.8. The dialysis catheter of claim 1 , wherein the limb port ...

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Номер записи: 97
26-07-2018 дата публикации

HEMODIALYSIS CATHETER WITH CORRUGATED TIPS

Номер: US20180207347A1
Автор: TAL Michael Gabriel
Принадлежит: PRISTINE ACCESS TECHNOLOGIES LTD

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 ...

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Номер записи: 98
04-07-2019 дата публикации

Packaging container for antimicrobial caps

Номер: US20190201681A1
Автор: Keith J. Modert, Matthew Case Ziebol, Robert J. Ziebol
Принадлежит: Pursuit Vascular Inc

Systems, methods, and articles for providing an antimicrobial composition to the proximal elements of a trans-dermal catheter and into the lumen of the transdermal catheter are disclosed. In an embodiment, an antimicrobial composition on surface a cap element transfers antimicrobial to the proximal end of the transdermal catheter. The system comprises an elongate member configured for insertion into a lumen of a catheter, the elongate member containing an antimicrobial.

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Номер записи: 99
10-08-2017 дата публикации

Device and Method for Gaining Access into a Body Cavity

Номер: US20170224900A1
Автор: Joe Hare, Judson E. Threlkeld, Robert L. Parton
Принадлежит: Individual

A device and methodology for gaining access into a body cavity of a patient is described and which includes an elongated sheath; an elongated dilator which is telescopingly received in the sheath, and wherein the elongated dilator has a distal end which is received within a body cavity to be accessed, a selectively inflatable occlusion balloon mounted on the dilator, and first and second sources of pressurized fluid which is coupled in fluid flowing relation relative to the dilator, and which further is effective, on the one hand, for inflating the occlusion balloon, and secondly for delivery into the body cavity of the patient based on the desires of a clinician.

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Номер записи: 100