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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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Применить Всего найдено 18. Отображено 18.
09-07-2009 дата публикации

Method and apparatus for removal of gas bubbles from blood

Номер: US2009173695A1
Автор: WIETING DAVID W, LENKER JAY A, WIETING DAVID W., LENKER JAY A.
Принадлежит:

A system is disclosed for removing gas bubbles from blood during circulatory assist procedures. Such bubbles are generated, along with particulate matter, in an extracorporeal circulatory bypass system by the pump, oxygenator and other components. Filters are used in the line to remove particulates and bubbles from the blood before they are pumped back to the patient but current filters are inefficient at removing small bubbles and debris that can cause neurological defects and renal and other organ failures in the patient. An active filter apparatus and method is disclosed that forces the bubbles to the center of the system where they are removed from the blood before the blood exits the filter. The filter comprises an axially elongate cylindrical shell with a blood inlet, a blood outlet and a gas outlet. A motor driven impeller spins the blood within the shell and forces the gas toward the center by centripetal force, utilizing the buoyancy effects of the bubbles in blood, whereby the ...

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Номер записи: 1
25-06-2009 дата публикации

Method and apparatus for prevention of catheter air intake

Номер: US2009163864A1
Автор: BREZNOCK EUGENE M, LENKER JAY A, WIETING DAVID W, BREZNOCK EUGENE M., LENKER JAY A., WIETING DAVID W.
Принадлежит:

A system is disclosed for preventing air from entering a first catheter or cannula of a multi-catheter system. Air is prevented from entering the proximal end of the first catheter by an axially elongate chamber having an impeller, the chamber being affixed to the proximal end of the first catheter. The first catheter is affixed at an offset location, near the periphery of the chamber. The impeller is driven by a motor drive and imparts rotational energy to the fluid within the chamber forcing any air within the chamber to migrate to the center of the chamber by buoyancy effects. The air is removed through a port near the centerline of the chamber. Liquid removed with the air is returned to the chamber to minimize liquid loss during the procedure. Hemostasis valves or seals can be provided at the entrance and the exit of the chamber. A second catheter inserted through the chamber and into the first catheter is unable to entrain gas into the first catheter because any gas that enters the ...

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Номер записи: 2
10-02-2009 дата публикации

Method and apparatus for removal of gas bubbles from blood

Номер: US0007488448B2
Автор: David W. Wieting, Jay A. Lenker, WIETING DAVID W, LENKER JAY A, WIETING DAVID W., LENKER JAY A.
Принадлежит: Indian Wells Medical, Inc., INDIAN WELLS MEDICAL INC, INDIAN WELLS MEDICAL, INC.

A system for removing gas bubbles from blood during circulatory assist procedures. An active filter apparatus forces the bubbles to the center of the system where they are removed from the blood before the blood exits the filter.

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Номер записи: 3
07-08-2012 дата публикации

Method and apparatus for prevention of catheter air intake

Номер: US0008235943B2
Автор: Eugene M. Breznock, Jay A. Lenker, David W. Wieting, BREZNOCK EUGENE M, LENKER JAY A, WIETING DAVID W, BREZNOCK EUGENE M., LENKER JAY A., WIETING DAVID W.
Принадлежит: Indian Wells Medical, Inc., BREZNOCK EUGENE M, LENKER JAY A, WIETING DAVID W, INDIAN WELLS MEDICAL INC, BREZNOCK EUGENE M., LENKER JAY A., WIETING DAVID W., INDIAN WELLS MEDICAL, INC.

A system for preventing air from entering a first catheter of a multi-catheter system. Air is prevented from entering the proximal end of the first catheter by an axially elongate chamber having an impeller, the chamber being affixed to the proximal end of the first catheter. The air is removed through a port near the centerline of the chamber. Liquid removed with the air is returned to the chamber to minimize liquid loss during the procedure. A second catheter inserted through the chamber and into the first catheter is unable to entrain gas into the first catheter because any gas that enters the chamber is routed to the centerline of the chamber where it is removed. Inflow of fluid from an external pump scrubs the second catheter shaft of air bubbles attached by surface tension.

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Номер записи: 4
27-01-2015 дата публикации

Method and apparatus for removal of gas bubbles from blood

Номер: US0008939926B2
Автор: David W. Wieting, Jay A. Lenker, WIETING DAVID W, LENKER JAY A, WIETING DAVID W., LENKER JAY A.
Принадлежит: Indian Wells Medical, Inc., INDIAN WELLS MEDICAL INC, INDIAN WELLS MEDICAL, INC.

A system and method for removing gas bubbles from blood during circulatory assist procedures. An active filter apparatus forces the bubbles to the center of the system where they are removed from the blood before the blood exits the filter.

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Номер записи: 5
02-11-2010 дата публикации

Method and apparatus for removal of gas bubbles from blood

Номер: US0007824356B2
Автор: David W. Wieting, Jay A. Lenker, WIETING DAVID W, LENKER JAY A, WIETING DAVID W., LENKER JAY A.
Принадлежит: Indian Wells Medical, Inc., INDIAN WELLS MEDICAL INC, INDIAN WELLS MEDICAL, INC.

A system is disclosed for removing gas bubbles from blood during circulatory assist procedures. Such bubbles are generated, along with particulate matter, in an extracorporeal circulatory bypass system by the pump, oxygenator and other components. Filters are used in the line to remove particulates and bubbles from the blood before they are pumped back to the patient but current filters are inefficient at removing small bubbles and debris that can cause neurological defects and renal and other organ failures in the patient. An active filter apparatus and method is disclosed that forces the bubbles to the center of the system where they are removed from the blood before the blood exits the filter. The filter comprises an axially elongate cylindrical shell with a blood inlet, a blood outlet and a gas outlet. A motor driven impeller spins the blood within the shell and forces the gas toward the center by centripetal force, utilizing the buoyancy effects of the bubbles in blood, whereby the ...

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Номер записи: 6
09-07-2013 дата публикации

Method and apparatus for removal of gas bubbles from blood

Номер: US0008480606B2
Автор: David W. Wieting, Jay A. Lenker, WIETING DAVID W, LENKER JAY A, WIETING DAVID W., LENKER JAY A.
Принадлежит: Indian Wells Medical, Inc., WIETING DAVID W, LENKER JAY A, INDIAN WELLS MEDICAL INC, WIETING DAVID W., LENKER JAY A., INDIAN WELLS MEDICAL, INC.

A system is disclosed for removing gas bubbles from blood during circulatory assist procedures. Such bubbles are generated, along with particulate matter, in an extracorporeal circulatory bypass system by the pump, oxygenator and other components. Current filters are inefficient at removing small bubbles that can cause neurological defects and renal and other organ failures in the patient. An active filter apparatus and method is disclosed that forces the bubbles to the center of the system where they are removed from the blood before the blood exits the filter. The filter comprises an axially elongate cylindrical shell with a blood inlet, a blood outlet and a gas outlet. A motor driven impeller spins the blood within the shell and forces the gas toward the center by centripetal force, utilizing the buoyancy effects of the bubbles in blood, whereby the bubbles can be bled off at the center of the filter.

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Номер записи: 7
11-06-2015 дата публикации

Method and Apparatus for Removal of Gas Bubbles from Blood

Номер: US20150157782A1
Автор: David W. Wieting, Jay A. Lenker, WIETING DAVID W, LENKER JAY A, WIETING DAVID W., LENKER JAY A.
Принадлежит: Indian Wells Medical, Inc.

A system and method for removing gas bubbles from blood during circulatory assist procedures. An active filter apparatus forces the bubbles to the center of the system where they are removed from the blood before the blood exits the filter. 1. A gas removal system for use in a cardiopulmonary bypass circuit for use with a patient , said system comprising:a pump for pumping blood from the patient through the bypass circuit; a shell defining a chamber characterized by a central axis, a top and bottom;', 'an impeller disposed within the chamber;', 'a motor operably connected to the impeller,', 'a gas vent in fluid communication with the central axis of the chamber and located proximate the top of the chamber,', 'a blood inlet port affixed to the chamber; and', 'a blood outlet port located at the radial periphery of said chamber;', 'wherein the impeller is configured to rotate a volume of blood within the chamber., 'an blood filter for removing gas bubbles from blood passing through the bypass circuit, said blood filter comprising2. The system of further comprising:a venous cannula in fluid communication with the pump, said venous cannula adapted for fluid connection to the venous system of a patient; andan arterial cannula in fluid communication with the blood outlet port, said arterial cannula adapted for fluid connection to the arterial system of the patient.3. The system of further wherein:the blood inlet port is located at a radial periphery of the chamber.4. The system of further wherein:the blood inlet port is located at a radial periphery of the chamber at a location lower than the blood outlet port.5. The system of wherein:the blood inlet port is disposed on the chamber tangentially aligned with the periphery of the chamber, such that blood enters the chamber in a direction tangential to the shell.6. The system of wherein:the blood outlet port is disposed on the chamber tangentially aligned with the periphery of the chamber, such that blood exits the chamber in ...

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Номер записи: 8
01-09-2005 дата публикации

Method and apparatus for removal of gas bubbles from blood

Номер: US2005192525A1
Автор: WIETING DAVID W, LENKER JAY A, WIETING DAVID W., LENKER JAY A.
Принадлежит:

A system for removing gas bubbles from blood during circulatory assist procedures. An active filter apparatus forces the bubbles to the center of the system where they are removed from the blood before the blood exits the filter.

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Номер записи: 9
03-11-2011 дата публикации

Method and Apparatus for Prevention of Catheter Air Intake

Номер: US20110270182A1
Автор: Eugene M. Breznock, Jay A. Lenker, David W. Wieting, BREZNOCK EUGENE M, LENKER JAY A, WIETING DAVID W, BREZNOCK EUGENE M., LENKER JAY A., WIETING DAVID W.
Принадлежит: Indian Wells Medical, Inc.

A system for preventing air from entering a first catheter of a multi-catheter system. Air is prevented from entering the proximal end of the first catheter by an axially elongate chamber having an impeller, the chamber being affixed to the proximal end of the first catheter. The air is removed through a port near the centerline of the chamber. Liquid removed with the air is returned to the chamber to minimize liquid loss during the procedure. A second catheter inserted through the chamber and into the first catheter is unable to entrain gas into the first catheter because any gas that enters the chamber is routed to the centerline of the chamber where it is removed. Inflow of fluid from an external pump scrubs the second catheter shaft of air bubbles attached by surface tension.

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Номер записи: 10
03-05-2011 дата публикации

Method and apparatus for prevention of catheter air intake

Номер: US0007935102B2
Автор: Eugene M. Breznock, Jay A. Lenker, David W. Wieting, BREZNOCK EUGENE M, LENKER JAY A, WIETING DAVID W, BREZNOCK EUGENE M., LENKER JAY A., WIETING DAVID W.
Принадлежит: Indian Wells Medical, Inc, INDIAN WELLS MEDICAL INC, INDIAN WELLS MEDICAL, INC

A system for preventing air from entering a first catheter of a multi-catheter system. Air is prevented from entering the proximal end of the first catheter by an axially elongate chamber having an impeller, the chamber being affixed to the proximal end of the first catheter. The air is removed through a port near the centerline of the chamber. Liquid removed with the air is returned to the chamber to minimize liquid loss during the procedure. A second catheter inserted through the chamber and into the first catheter is unable to entrain gas into the first catheter because any gas that enters the chamber is routed to the centerline of the chamber where it is removed. Inflow of fluid from an external pump scrubs the second catheter shaft of air bubbles attached by surface tension.

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Номер записи: 11
28-02-2013 дата публикации

METHOD AND APPARATUS FOR PREVENTION OF CATHETER AIR INTAKE

Номер: US20130053693A1
Автор: Breznock Eugene M., Lenker Jay A., Wieting David W.
Принадлежит:

A system for preventing air from entering a first catheter of a multi-catheter system. Air is prevented from entering the proximal end of the first catheter by an axially elongate chamber having an impeller, the chamber being affixed to the proximal end of the first catheter. The air is removed through a port near the centerline of the chamber. Liquid removed with the air is returned to the chamber to minimize liquid loss during the procedure. A second catheter inserted through the chamber and into the first catheter is unable to entrain gas into the first catheter because any gas that enters the chamber is routed to the centerline of the chamber where it is removed. Inflow of fluid from an external pump scrubs the second catheter shaft of air bubbles attached by surface tension. 1. An apparatus adapted for preventing gas from entering a first catheter upon insertion of a second catheter into the first catheter , said apparatus comprising:a shell, wherein the interior volume of the shell defines a chamber having a centerline;an impeller operable to rotate about or near the centerline of the chamber, wherein the impeller is located within the chamber and is configured to rotate liquid within the chamber;a catheter inlet port, in fluid communication with the chamber, located near a periphery of said chamber, said catheter inlet port in fluid communication with the chamber; anda catheter outlet port located near a periphery of said chamber, said catheter outlet port in fluid communication with the chamber;wherein the catheter inlet port is coaxially aligned with the catheter outlet port.2. The apparatus of further comprising a gas vent located near a central axis of the chamber claim 1 , and in fluid communication with the chamber.3. The apparatus of further comprising a liquid return port.4. The apparatus of further comprising a gas collection chamber.5. The apparatus of wherein the proximal end of the catheter outlet port comprises a funnel to guide a flexible ...

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Номер записи: 12
19-12-2013 дата публикации

METHOD AND APPARATUS FOR REMOVAL OF GAS BUBBLES FROM BLOOD

Номер: US20130338561A1
Автор: Lenker Jay A., Wieting David W.
Принадлежит: Indian Wells Medical, Inc.

A system and method for removing gas bubbles from blood during circulatory assist procedures. An active filter apparatus forces the bubbles to the center of the system where they are removed from the blood before the blood exits the filter. 1. A method for removing gas bubbles from blood to be returned to a patient from a cardiopulmonary bypass circuit comprising the steps of:moving blood from a patient into a cardiopulmonary bypass circuit;filtering particulates from the blood flowing within the cardiopulmonary bypass circuit;operably connecting the cardiopulmonary bypass circuit to the venous system of the patient with a venous cannula; andremoving gas bubbles from the blood passing through the bypass circuit, the step of removing the gas bubbles from the blood comprising:providing a shell, the shell comprising an axially elongate chamber;disposing an impeller within the chamber, wherein the impeller is configured to rotate a volume of blood within the chamber about the central axis of the chamber thus forcing air bubbles within the volume of blood to migrate radially inward in response to centrifugal forces imparted on the volume of blood by the rotation of said blood;reducing the pressure within the chamber; andcausing blood to flow into the chamber through a blood inlet port in the shell, the blood inlet port being in fluid communication with a venous cannula, wherein the blood inlet port is located near the circumferential periphery of the shell; rotating the impeller with a motor; venting gas from the central axis of the chamber;reducing the pressure within the chamber; andreceiving blood flowing out of the chamber through a blood outlet port in the shell, the blood outlet port being in fluid communication with the chamber and an arterial cannula and a blood pump configured to pump blood into the patient, wherein the blood outlet port is located near the circumferential periphery of the shell and wherein said arterial cannula is in fluid connection with the ...

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Номер записи: 13
28-12-1993 дата публикации

Method and device for testing venous valves

Номер: US5272909A
Автор: Amir H. Abolfathi, Aws Nashef, David W. Wieting, Denis Lee, Than Nguyen
Принадлежит: Baxter International Inc

A method and device for testing artificial or natural venous valves. The device comprises (a) a fixture for mounting a sample valve on a liquid flow path, (b) a muscle pump component and/or (o) respiratory pump component and/or (d) capacitance reservoir component and/or (e) vertical hydrostatic column component, all of the components being fluidly connected to the flow path to mimic the muscle pump, respiratory pump, capacitance and hydrostatic impedance effects of actual in situ venous circulation in the mammalian body. The invention includes methods of testing venous valves by mimicking known hemodynamic flow conditions within a mammalian body.

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Номер записи: 14
30-09-1991 дата публикации

Mechanical heart valve with compliant sewing ring

Номер: CA2079339A1
Автор: David W. Wieting, Hung L. Lam, Ralph Kafesjian, Robert Stobie, Than Nguyen
Принадлежит: BAXTER INTERNATIONAL INC., David W. Wieting, EDWARDS LIFESCIENCES CORPORATION, Hung L. Lam, Ralph Kafesjian, Robert Stobie, Than Nguyen

A mechanical heart valve (11) having one or more leaflets (17) pivotally fitted in a substantially cylindrical shaped valve body (19) formed from a resiliently deformable material. A stiffening member (25) formed from substantially nonresilient material fit about the valve body exterior wall to provide structural integrity to the valve body (19). Stresses which are normally applied to the heart valve body during the opening and closing of the valve are absorbed or cushioned by the incorporation of a rubber-like body (26) between the stiffening member (25) and the retainer member (33). Further cushioning is provided by incorporating another rubber-like body (28) in the sewing ring (13). This second body extends out from the exterior surface of the valve body. Finally, a length of fabric (15) is positioned about the retainer (33) and shock absorbing bodies (26). This design provides a precisely calibrated rotational torque which allows for optimum orientation of the leaflets by the implanting surgeon.

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Номер записи: 15
13-01-1993 дата публикации

Mechanical heart valve with compliant sewing ring.

Номер: EP0522048A1
Автор: David W Wieting, Hung L Lam, Ralph Kafesjian, Robert Stobie, Than Nguyen
Принадлежит: Baxter International Inc

Valvule cardiaque mécanique (11) comportant une ou plusieurs valves (17) montées pivotantes dans un corps (19) de valvule de forme cylindrique composé d'un matériau déformable de manière résiliente. Un élément de raidissement (25) en matériau non résilient s'adapte autour de la paroi extérieure du corps de valvule afin de donner une intégrité structurelle audit corps de valvule (19). Les contraintes normalement appliquées au corps de valvule cardiaque pendant l'ouverture et la fermeture de ladite valvule sont absorbées ou amorties par l'incorporation d'un corps analogue à du caoutchouc (26) entre l'élément de raidissement (25) et l'élément de rétention (33). On obtient davantage d'amortissement par l'incorporation d'un autre corps analogue à du caoutchouc (28) dans ladite bague de suture (13). Ce second corps s'étend à partir de la surface extérieure du corps de valvule. Enfin, une longueur de tissu (15) est positionné autour de l'élément de rétention (33) et des corps d'absorption des chocs (26). Cette conception fourni une torsion rotationnelle précisément étalonnée permettant une orientation optimale des valves par le chirurgien effectuant l'implantation. A mechanical heart valve (11) having one or more leaflets (17) pivotally mounted in a cylindrically shaped valve body (19) made of a resiliently deformable material. A stiffening member (25) of non-resilient material fits around the outer wall of the valve body to provide structural integrity to said valve body (19). The stresses normally applied to the heart valve body during opening and closing of said valve are absorbed or cushioned by the incorporation of a rubber-like body (26) between the stiffening member (25) and the retention element (33). Further cushioning is achieved by incorporating another rubber-like body (28) into said suture ring (13). This second body extends from the exterior surface of the valve body. Finally, a length of fabric (15) is ...

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Номер записи: 16
09-07-2009 дата публикации

Method and apparatus for removal of gas bubbles from blood

Номер: US20090173695A1
Автор: David W. Wieting, Jay A. Lenker
Принадлежит: Individual

A system is disclosed for removing gas bubbles from blood during circulatory assist procedures. Such bubbles are generated, along with particulate matter, in an extracorporeal circulatory bypass system by the pump, oxygenator and other components. Filters are used in the line to remove particulates and bubbles from the blood before they are pumped back to the patient but current filters are inefficient at removing small bubbles and debris that can cause neurological defects and renal and other organ failures in the patient. An active filter apparatus and method is disclosed that forces the bubbles to the center of the system where they are removed from the blood before the blood exits the filter. The filter comprises an axially elongate cylindrical shell with a blood inlet, a blood outlet and a gas outlet. A motor driven impeller spins the blood within the shell and forces the gas toward the center by centripetal force, utilizing the buoyancy effects of the bubbles in blood, whereby the bubbles can be bled off at the center of the filter element.

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Номер записи: 17
31-01-2017 дата публикации

Method and apparatus for removal of gas bubbles from blood

Номер: US09555182B2
Автор: David W. Wieting, Jay A. Lenker
Принадлежит: Indian Wells Medical Inc

A system and method for removing gas bubbles from blood during circulatory assist procedures. An active filter apparatus forces the bubbles to the center of the system where they are removed from the blood before the blood exits the filter.

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Номер записи: 18