Cindy T Nguyen

US Patent:

6458099, Oct 1, 2002

Filed:

Aug 14, 2001

Appl. No.:

09/929407

Inventors:

Debashis Dutta - Santa Clara CA
Cindy Nguyen - San Jose CA
Eugene Serina - Menlo Park CA
Kristin E. Welborn - Santa Clara CA

Assignee:

Advanced Cardiovascular Systems, Inc. - Santa Clara CA

International Classification:

A61M 2900

US Classification:

60410304, 604 9601

Abstract:

An intravascular catheter capable of both rapid-exchange and over-the-wire modes of operation having a relatively long proximal shaft portion, a relatively short distal section and an intermediate shaft section, which connects the proximal shaft section and the distal shaft section. In one embodiment, the intermediate shaft section includes a guide wire port and a first guide wire lumen which extends throughout both the intermediate and distal shaft section, and a second guide wire lumen which extends throughout the entire catheter shaft. In another embodiment, the intermediate shaft section includes a y-lumen junction which allows a first guide wire lumen introduced at the intermediate shaft section and a second guide wire lumen extending from the proximal end of the catheter shaft throughout the proximal shaft section to merge and communicate with a single distal guide wire lumen which extends from the intermediate shaft section to the distal end of the catheter shaft. In another embodiment, the catheter shaft includes a single guide wire lumen extending from the proximal end to the distal end wherein the guide wire lumen is defined by a proximal section and a distal section. The proximal section guide wire lumen includes a slit which allows a guide wire to be removed for rapid-exchange mode of operation or retained for over-the-wire mode of operation.

US Patent:

7435247, Oct 14, 2008

Filed:

Jun 27, 2002

Appl. No.:

10/187733

Inventors:

Jean Woloszko - Austin TX, US
Michael A. Baker - Austin TX, US
Robert H. Dahla - Sunnyvale CA, US
Hardev Kahlon - San Jose CA, US
Adelina Villaruel - San Jose CA, US
Cindy Truc Nguyen - San Jose CA, US
Irma Gutierrez - San Jose CA, US

Assignee:

ArthroCare Corporation - Austin TX

International Classification:

A61B 18/18

US Classification:

606 41

Abstract:

Systems and methods are provided for applying a high frequency voltage in the presence of an electrically conductive fluid. High frequency voltage is then applied between the active electrode(s) and one or more return electrode(s) to volumetrically remove or ablate at least a portion of the target tissue. In one embodiment a tissue treatment surface includes spacers or a chamber for containing the electrodes.

US Patent:

20030028143, Feb 6, 2003

Filed:

Sep 30, 2002

Appl. No.:

10/260774

Inventors:

Debashis Dutta - Santa Clara CA, US
Cindy Nguyen - San Jose CA, US
Eugene Serina - Menlo Park CA, US
Kristin Welborn - Santa Clara CA, US

International Classification:

A61M029/00

US Classification:

604/103040, 606/194000

Abstract:

An intravascular catheter capable of both rapid-exchange and over-the-wire modes of operation having a relatively long proximal shaft portion, a relatively short distal section and an intermediate shaft section, which connects the proximal shaft section and the distal shaft section. In one embodiment, the intermediate shaft section includes a guide wire port and a first guide wire lumen which extends throughout both the intermediate and distal shaft section, and a second guide wire lumen which extends throughout the entire catheter shaft. In another embodiment, the intermediate shaft section includes a y-lumen junction which allows a first guide wire lumen introduced at the intermediate shaft section and a second guide wire lumen extending from the proximal end of the catheter shaft throughout the proximal shaft section to merge and communicate with a single distal guide wire lumen which extends from the intermediate shaft section to the distal end of the catheter shaft. In another embodiment, the catheter shaft includes a single guide wire lumen extending from the proximal end to the distal end wherein the guide wire lumen is defined by a proximal section and a distal section. The proximal section guide wire lumen includes a slit which allows a guide wire to be removed for rapid-exchange mode of operation or retained for over-the-wire mode of operation.

US Patent:

62995952, Oct 9, 2001

Filed:

Dec 17, 1999

Appl. No.:

9/466365

Inventors:

Debashis Dutta - Santa Clara CA
Cindy Nguyen - San Jose CA
Eugene Serina - Menlo Park CA
Kristin E. Welborn - Santa Clara CA

Assignee:

Advanced Cardiovascular Systems, Inc. - Santa Clara CA

International Classification:

A61M 2900

US Classification:

604 96

Abstract:

An intravascular catheter capable of both rapid-exchange and over-the-wire modes of operation having a relatively long proximal shaft portion, a relatively short distal section and an intermediate shaft section, which connects the proximal shaft section and the distal shaft section. In one embodiment, the intermediate shaft section includes a guide wire port and a first guide wire lumen which extends throughout both the intermediate and distal shaft section, and a second guide wire lumen which extends throughout the entire catheter shaft. In another embodiment, the intermediate shaft section includes a y-lumen junction which allows a first guide wire lumen introduced at the intermediate shaft section and a second guide wire lumen extending from the proximal end of the catheter shaft throughout the proximal shaft section to merge and communicate with a single distal guide wire lumen which extends from the intermediate shaft section to the distal end of the catheter shaft. In another embodiment, the catheter shaft includes a single guide wire lumen extending from the proximal end to the distal end wherein the guide wire lumen is defined by a proximal section and a distal section. The proximal section guide wire lumen includes a slit which allows a guide wire to be removed for rapid-exchange mode of operation or retained for over-the-wire mode of operation.