Patents by Inventor David W. Wieting
David W. Wieting has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10369265Abstract: A system and method for removing gas bubbles from fluid. An active filter apparatus forces the bubbles to the center of the filter, while a pump supplies fluid to the filter.Type: GrantFiled: January 31, 2017Date of Patent: August 6, 2019Assignee: Indian Wells Medical, Inc.Inventors: David W. Wieting, Jay A. Lenker
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Patent number: 9555182Abstract: 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.Type: GrantFiled: January 27, 2015Date of Patent: January 31, 2017Assignee: Indian Wells Medical, Inc.Inventors: David W. Wieting, Jay A. Lenker
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Publication number: 20150157782Abstract: 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.Type: ApplicationFiled: January 27, 2015Publication date: June 11, 2015Applicant: Indian Wells Medical, Inc.Inventors: David W. Wieting, Jay A. Lenker
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Patent number: 8939926Abstract: 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.Type: GrantFiled: May 28, 2013Date of Patent: January 27, 2015Assignee: Indian Wells Medical, Inc.Inventors: David W. Wieting, Jay A. Lenker
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Publication number: 20130338561Abstract: 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.Type: ApplicationFiled: May 28, 2013Publication date: December 19, 2013Applicant: Indian Wells Medical, Inc.Inventors: David W. Wieting, Jay A. Lenker
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Patent number: 8480606Abstract: 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.Type: GrantFiled: November 2, 2010Date of Patent: July 9, 2013Assignee: Indian Wells Medical, Inc.Inventors: David W. Wieting, Jay A. Lenker
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Publication number: 20130053693Abstract: 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.Type: ApplicationFiled: August 7, 2012Publication date: February 28, 2013Inventors: Eugene M. Breznock, Jay A. Lenker, David W. Wieting
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Patent number: 8235943Abstract: 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.Type: GrantFiled: May 2, 2011Date of Patent: August 7, 2012Assignee: Indian Wells Medical, Inc.Inventors: Eugene M. Breznock, Jay A. Lenker, David W. Wieting
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Publication number: 20110270182Abstract: 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.Type: ApplicationFiled: May 2, 2011Publication date: November 3, 2011Inventors: Eugene M. Breznock, Jay A. Lenker, David W. Wieting
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Patent number: 7935102Abstract: 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.Type: GrantFiled: December 19, 2008Date of Patent: May 3, 2011Assignee: Indian Wells Medical, IncInventors: Eugene M. Breznock, Jay A. Lenker, David W. Wieting
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Publication number: 20110054380Abstract: 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.Type: ApplicationFiled: November 2, 2010Publication date: March 3, 2011Inventors: David W. Wieting, Jay A. Lenker
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Patent number: 7824356Abstract: 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.Type: GrantFiled: February 4, 2009Date of Patent: November 2, 2010Assignee: Indian Wells Medical, Inc.Inventors: David W. Wieting, Jay A. Lenker
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Publication number: 20090173695Abstract: 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.Type: ApplicationFiled: February 4, 2009Publication date: July 9, 2009Inventors: David W. Wieting, Jay A. Lenker
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Publication number: 20090163864Abstract: 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.Type: ApplicationFiled: December 19, 2008Publication date: June 25, 2009Inventors: Eugene M. Breznock, Jay A. Lenker, David W. Wieting
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Patent number: 7488448Abstract: 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.Type: GrantFiled: March 1, 2004Date of Patent: February 10, 2009Assignee: Indian Wells Medical, Inc.Inventors: David W. Wieting, Jay A. Lenker
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Patent number: 5716398Abstract: A valve rotator comprising a body having a generally annular peripheral surface at one end of the body and a central cavity opening at such end. The annular peripheral surface substantially surrounds the central cavity and has an interlocking surface region configured to interlock with a rotor of a rotatable valve. The body had a generally annular shoulder adjacent such one end which generally faces such end of the body. The annular peripheral surface extends toward that end of the body from the annular shoulder.Type: GrantFiled: January 23, 1995Date of Patent: February 10, 1998Assignee: Baxter International, Inc.Inventors: Robert Sparks, Chris Kingsbury, David W. Wieting
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Patent number: 5327774Abstract: A method and device for testing artificial or natural venous valves. The device comprises chamber (10) a sample for mounting a test valve (V) on a liquid flow path and a muscle pump component (16) and/or respiratory pump component (50) and/or capacitance reservoir (58) and/or vertical hydrostatic column component (102) fluidly connected to the flow path to mimic the muscle pump, respiratory pump, capacitance and hydrostatic impedance effects on venous circulation in the mammalian body. Included in the invention are methods of testing venous valves by mimicking known hemodynamic flow conditions within a mammalian body.Type: GrantFiled: October 8, 1993Date of Patent: July 12, 1994Assignee: Baxter International Inc.Inventors: Than Nguyen, Aws Nashef, Amir H. Abolfathi, David W. Wieting, Denis Lee
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Patent number: 5272909Abstract: 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.Type: GrantFiled: April 25, 1991Date of Patent: December 28, 1993Assignee: Baxter International Inc.Inventors: Than Nguyen, Aws Nashef, Amir H. Abolfathi, David W. Wieting, Denis Lee
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Patent number: 5035709Abstract: A mechanical heart valve having one or more leaflets pivotally fitted in a substantially cylindrical shaped valve body formed from a resiliently deformable material. A stiffening member formed from substantially nonresilient material fit about the valve body exterior wall to provide structural integrity to the valve body. 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 between the stiffening member and the retainer member. Further cushioning is provided by incorporating another rubber-like body in the sewing ring. This second body extends out from the exterior surface of the valve body. Finally, a length of fabric is positioned about the retainer and shock absorbing bodies. This design provides a precisely calibrated rotational torque which allows for optimum orientation of the leaflets by the implanting surgeon.Type: GrantFiled: March 29, 1990Date of Patent: July 30, 1991Assignee: Baxter International Inc.Inventors: David W. Wieting, Than Nguyen, Robert Stobie, Hung L. Lam, Ralph Kafesjian