David S Chi

US Patent:

6613014, Sep 2, 2003

Filed:

Jun 9, 2000

Appl. No.:

09/590946

Inventors:

David Chi - Cerritos CA

Assignee:

Advanced Cardiovascular Systems, Inc. - Santa Clara CA

International Classification:

A61M 3100

US Classification:

604 9301

Abstract:

A handle member for gripping a catheter shaft to facilitate advancement in a patients body lumen. The handle member is configured to be releasably secured to the catheter shaft. Further, the handle is longitudinally displaceable along at least a length of the catheter shaft, so as to be slidably positional along the shaft. The handle member may be detachably connected to an adapter on the proximal end of the catheter shaft. Additionally, one embodiment of the handle member has internal grooves on the outer wall of the handle member, so that the user would have finger placement holds. The handle member may be made of a softer material than the catheter shaft, and have a tapered outer surface for comfort of the user.

US Patent:

20040002678, Jan 1, 2004

Filed:

Apr 11, 2003

Appl. No.:

10/411790

Inventors:

David Chi - Cerritos CA, US

International Classification:

A61M031/00

US Classification:

604/093010, 604/057000

Abstract:

A handle member for gripping a catheter shaft to facilitate advancement in a patient's body lumen. The handle member is configured to be releasably secured to the catheter shaft. Further, the handle is longitudinally displaceable along at least a length of the catheter shaft, so as to be slidably positional along the shaft. The handle member may be detachably connected to an adapter on the proximal end of the catheter shaft. Additionally, one embodiment of the handle member has internal grooves on the outer wall of the handle member, so that the user would have finger placement holds. The handle member may be made of a softer material than the catheter shaft, and have a tapered outer surface for comfort of the user.

US Patent:

20060004438, Jan 5, 2006

Filed:

Jun 15, 2005

Appl. No.:

11/154056

Inventors:

Miles Alexander - Sunnyvale CA, US
Eric Leopold - Redwood City CA, US
David Chi - Corona Del Mar CA, US

Assignee:

Novostent Corporation - Mountain View CA

International Classification:

A61F 2/06

US Classification:

623001220

Abstract:

The present invention is directed to a prosthesis for treating an aneurysm, and delivery systems and methods therefor. The prosthesis includes a radially expanding distal section coupled to a helical section, the helical section including a localized feature configured to exclude or retard blood flow into an aneurysm. Methods of loading the prosthesis onto a specially-designed delivery system that facilitates proper orientation of the prosthesis within a target vessel, and methods of using the delivery system to deliver the prosthesis, also are provided.

US Patent:

20070038056, Feb 15, 2007

Filed:

Oct 19, 2006

Appl. No.:

11/583263

Inventors:

Carlo Pappone - Lecco, IT
Peter Chen - Irvine CA, US
Alan de la Rama - Cerritos CA, US
Cary Hata - Irvine CA, US
Vivian Tran - Santa Ana CA, US
David Chi - Irvine CA, US

International Classification:

A61B 18/04
A61B 5/04

US Classification:

600374000, 600381000, 606027000, 606041000

Abstract:

A catheter for sensing electrical events about a selected annulus region of the heart and for treating tissue in the selected annulus region has a handle assembly, a shaft having a proximal end coupled to the handle assembly, a first expandable member provided at the distal end of the shaft, and a second expandable member positioned adjacent to, but spaced apart from, the first expandable member. The second expandable member has an ablation element that emits energy to a radially surrounding area to ablate tissue.

US Patent:

20080051876, Feb 28, 2008

Filed:

Aug 20, 2007

Appl. No.:

11/841291

Inventors:

Diem Uyen Ta - San Jose CA, US
David Chi - Irvine CA, US
Svava Maria Atladottir - San Francisco CA, US
Bjorn Svensson - Gilroy CA, US

Assignee:

ADVANCED CARDIOVASCULAR SYSTEMS, INC. - SANTA CLARA CA

International Classification:

A61F 2/82

US Classification:

623 116, 623 134, 623 142

Abstract:

An expandable stent for implanting in a body lumen, such as a coronary artery, peripheral artery, or other body lumen. In one aspect, the stent includes a butterfly pattern to which connecting links are attached. In another aspect, the stent embodies a non-directional structure. One embodiment is a stent in which one or both ends are more flexible than the center portion. Also, the stent may have a non-uniform drug coating. Another embodiment relates to a stent having ends that are more radiopaque than the center portion.