Steven S Stringer

US Patent:

6730267, May 4, 2004

Filed:

Feb 9, 2001

Appl. No.:

09/780923

Inventors:

Steven K. Stringer - Santa Clara CA
Kevin L. Hultquist - Mountain View CA
Mehrdad Farhangnia - Sunnyvale CA
Fred I. Linker - Los Altos CA
James M. Culp - Los Gatos CA
Jean-Pierre Dueri - Sunnyvale CA
Thomas A. Afzal - Menlo Park CA

Assignee:

Cardiovention, Inc. - Santa Clara CA

International Classification:

A61M 114

US Classification:

422 45, 422 44, 604 401, 604 609, 604 611, 604 614, 210645, 96 10, 261DIG 28, 261 24

Abstract:

Apparatus and methods for pumping and oxygenating blood are provided that include a gas removal system. An integrated blood processing unit is provided in which a gas removal/blood filter, pump and blood oxygenation element are mounted within a common housing. The gas removal system includes a sensor mounted on the housing to sense the presence of gas, and a valve is operably coupled to the sensor to evacuate gas from the system when the sensor detects an accumulation of gas.

US Patent:

6773670, Aug 10, 2004

Filed:

Feb 5, 2002

Appl. No.:

10/067434

Inventors:

Steven K. Stringer - Santa Clara CA
Kevin L. Hultquist - Mountain View CA
Mehrdad Farhangnia - Sunnyvale CA
Fred I. Linker - Los Altos CA

Assignee:

CardioVention, Inc. c/o The Brenner Group, Inc. - Cupertino CA

International Classification:

A61M 136

US Classification:

422 44, 604 609, 604 61, 604 615, 210349, 2103231, 96 6, 96421

Abstract:

Apparatus and methods for removing gas from a blood handling system. A filter apparatus for monitoring and removing gas is provided comprising of a gas removal/blood filter, a sensor to sense the presence of gas, and a valve operably coupled to the sensor to evacuate gas from the apparatus when the sensor detects an accumulation of gas. When used with a previously known blood handling system, the present filter apparatus facilitates priming and the addition of additional blood handling elements during operation of the blood handling system.

US Patent:

6890316, May 10, 2005

Filed:

Apr 25, 2002

Appl. No.:

10/134138

Inventors:

Thomas A. Rawles - Plano TX, US
A. Kenneth Litzie - Tustin Ranch CA, US
David M. Fallen - Asheville NC, US
Steven K. Stringer - Santa Clara CA, US

Assignee:

Cardiovention, Inc. - Cupertino CA

International Classification:

A61M037/00

US Classification:

604 616, 604264, 604 401

Abstract:

A tubing set for use with a blood handling system is described that decreases the priming volume and surface area of the blood handling circuit, lowering the risk of hemodilution, platelet activation, and hemolysis. The tubing set also reduces the number of manual connections required, and uses quick-disconnect couplings to facilitate connections between the various lines, and between the lines and the arterial and venous cannulae.

US Patent:

6960322, Nov 1, 2005

Filed:

Jul 8, 2003

Appl. No.:

10/616116

Inventors:

Steven K. Stringer - Santa Clara CA, US
Kevin L. Hultquist - Mountain View CA, US
Mehrdad Farhangnia - Sunnyvale CA, US
Fred I. Linker - Los Altos CA, US
James M. Culp - Los Gatos CA, US
Jean-Pierre Dueri - Sunnyvale CA, US
Thomas A. Afzal - Menlo Park CA, US

Assignee:

Cardiovention, Inc. - Santa Clara CA

International Classification:

A61M001/14
A61M037/00
C02F001/44
B01D053/22
B01D047/08

US Classification:

422 45, 422 44, 604 401, 604 609, 604 611, 604 614, 210645, 96 10, 261 24, 261DIG 28

Abstract:

Apparatus and methods for pumping and oxygenating blood are provided that include a gas removal system. An integrated blood processing unit is provided in which a gas removal/blood filter, pump and blood oxygenation element are mounted within a common housing. The gas removal system includes a sensor mounted on the housing to sense the presence of gas, and a valve is operably coupled to the sensor to evacuate gas from the system when the sensor detects an accumulation of gas.

US Patent:

7022099, Apr 4, 2006

Filed:

Mar 17, 2003

Appl. No.:

10/392441

Inventors:

A. Kenneth Litzie - Tustin Ranch CA, US
Steven K. Stringer - Los Gatos CA, US
Mehrdad Farhangnia - Sunnyvale CA, US
Muslim Tyebjee - Sunnyvale CA, US
Thomas A. Afzal - Menlo Park CA, US

Assignee:

Cardiovention, Inc. - Santa Clara CA

International Classification:

A61M 37/00
A61M 1/14
A61M 1/34
B01D 35/16
B01D 24/00

US Classification:

604 609, 604 401, 604 61, 422 44, 128DIG 3, 210348, 2104161

Abstract:

Apparatus for processing blood in an extracorporeal circuit with automatic flow control is provided in which error conditions are sensed and system operation is modulated responsive to the error conditions. The apparatus includes an extracorporeal blood processing system, at least one sensor that senses the presence or absence of gas or monitors venous pressure, and a controller operably coupled to the blood processing system to selectively reduce pump speed or to reconfigure flow paths within the blood processing system responsive to the sensor output.

US Patent:

7022284, Apr 4, 2006

Filed:

May 9, 2003

Appl. No.:

10/434887

Inventors:

Ben F. Brian - Menlo Park CA, US
John Thomas Buckley - San Jose CA, US
Jean-Pierre Dueri - Sunnyvale CA, US
Mehrdad Farhangnia - Sunnyvale CA, US
Steven K. Stringer - Los Gatos CA, US

Assignee:

Cardiovention, Inc. - Santa Clara CA

International Classification:

A61M 1/34
A61M 1/36
A61M 37/00

US Classification:

422 46, 422 45, 604 611, 604 613, 604 614, 261DIG 28, 128DIG 3

Abstract:

Apparatus for oxygenating and pumping blood includes a housing defining a blood flow path including, in series, a gas collection plenum, a pump space and a blood oxygenation element. A pump disposed in the pump space is configured to draw blood from the gas collection plenum and propel blood from the pump space through a heat exchanger and the blood oxygenation element. The heat exchanger includes a heat exchange plate and a coolant space.

US Patent:

7541000, Jun 2, 2009

Filed:

Sep 26, 2005

Appl. No.:

11/236269

Inventors:

Steven K. Stringer - Los Gatos CA, US
Kevin L. Hultquist - Mountain View CA, US
Mehrdad Farhangnia - Sunnyvale CA, US
Fred I. Linker - Los Altos CA, US
James M. Culp - Los Gatos CA, US
Jean-Pierre Dueri - Sunnyvale CA, US
Thomas A. Afzal - Menlo Park CA, US

Assignee:

Cardiovention, Inc. - Menlo Park CA

International Classification:

A61M 1/14
A61M 37/00
C02F 1/44
B01D 53/22
B01D 47/08

US Classification:

422 45, 422 44, 604 401, 604 609, 604 614, 210645

Abstract:

Apparatus and methods for pumping and oxygenating blood are provided that include a gas removal system. An integrated blood processing unit is provided in which a gas removal/blood filter, pump and blood oxygenation element are mounted within a common housing. The gas removal system includes a sensor mounted on the housing to sense the presence of gas, and a valve is operably coupled to the sensor to evacuate gas from the system when the sensor detects an accumulation of gas.

US Patent:

20040228760, Nov 18, 2004

Filed:

Jun 21, 2004

Appl. No.:

10/872733

Inventors:

Steven Stringer - Santa Clara CA, US
Kevin Hultquist - Mountain View CA, US
Mehrdad Farhangnia - Sunnyvale CA, US
Fred Linker - Los Altos CA, US
Ben Brian - Menlo Park CA, US

Assignee:

Cardiovention, Inc. - Cupertino CA

International Classification:

A61M001/14
A61M037/00

US Classification:

422/044000, 604/004010

Abstract:

Apparatus and methods for removing gas from a blood handling system. A filter apparatus for monitoring and removing gas is provided comprising of a gas removal/blood filter, a sensor to sense the presence of gas, and a valve operably coupled to the sensor to evacuate gas from the apparatus when the sensor detects an accumulation of gas. When used with a previously known blood handling system, the present filter apparatus facilitates priming and the addition of additional blood handling elements during operation of the blood handling system.