Kenny Pham Dang

US Patent:

6471721, Oct 29, 2002

Filed:

Dec 30, 1999

Appl. No.:

09/475380

Inventors:

Kenny Dang - San Jose CA

Assignee:

Advanced Cardiovascular Systems, Inc. - Santa Clara CA

International Classification:

A61F 206

US Classification:

623 134, 623 115, 623 144, 623 146

Abstract:

A stent for use in a patients blood vessel to maintain the patency of the vessel contains strategically located radiopaque material. The strategic placement of the radiopaque material in the core structure of the stent functions to enhance the resolution of the stent under fluoroscopy. The initial part of the process includes forming a groove in a piece of tube stock and securing radiopaque material into the groove by press fitting or diffusion bonding. After the securing method, a layer of material can be sputtered coated over the only radiopaque material or over the entire stent. Finally, a pattern of struts and splines is cut into the tube composite to form the stent.

US Patent:

6579310, Jun 17, 2003

Filed:

Aug 17, 2000

Appl. No.:

09/641984

Inventors:

Daniel L. Cox - Palo Alto CA
Kenny Dang - San Jose CA
Andreina P. Gomez - Palo Alto CA
Orlando Padilla - Los Gatos CA

Assignee:

Advanced Cardiovascular Systems, Inc. - Santa Clara CA

International Classification:

A61F 206

US Classification:

623 116, 623 115

Abstract:

An intravascular stent having struts which overlap, at least partially, when the stent is compressed. The overlapping struts allow the stent to be crimped to a smaller initial delivery diameter than may be achieved with non-overlapping designs for given metal density. The stent has a reduced delivery diameter which allows for the construction of reduced profile stent-delivery systems, which thereby allow for the stenting of smaller vessels than has heretofore been possible.

US Patent:

6607554, Aug 19, 2003

Filed:

Jun 29, 2001

Appl. No.:

09/896931

Inventors:

Kenny L. Dang - San Jose CA
Andreina Gomez - Santa Clara CA
Su-Wen Ueng - Cupertino CA

Assignee:

Advanced Cardiovascular Systems, Inc. - Santa Clara CA

International Classification:

A61F 206

US Classification:

623 115

Abstract:

The present invention provides an improved stent design for repairing a vessel. The stent design incorporates crimpable, short non-linear links which are flexible in three dimensions and which include flexible arms. The ability to accommodate both small deformations that occur during delivery and larger deformations that occur upon expansion within the vessel is enhanced without sacrificing stent crimp diameter. The link may incorporate a short flexible link with a perpendicular transition to provide added flexibility.

US Patent:

6758859, Jul 6, 2004

Filed:

Oct 30, 2000

Appl. No.:

09/699786

Inventors:

Kenny L. Dang - San Jose CA 95128
Nazanine Matin - Palo Alto CA 94303
Henjen Ho - San Jose CA 95129

International Classification:

A61F 206

US Classification:

623 115, 623 142

Abstract:

An implantable prosthesis, for example a stent, is provided having one or more elements that form the body structure of the prosthesis. The elements have a width that is variable from a nominal or conventional width to an increased width. Depots are formed in the elements and are generally located at the increased width portions of the elements. The diameter of the depots is based on a percentage of the width of the element. As such, the depots have increased drug-loading capabilities. Substances such as therapeutic substances, polymeric materials, polymeric materials containing therapeutic substances, radioactive isotopes, and radiopaque materials can be deposited into the depots. Further, the variable width of the elements ensures that sufficient material surrounds each depot so as not to compromise the structural integrity of the prosthesis.

US Patent:

6979349, Dec 27, 2005

Filed:

Aug 14, 2003

Appl. No.:

10/641485

Inventors:

Kenny L. Dang - San Jose CA, US
Andreina Gomez - Santa Clara CA, US
Su-Wen Ueng - Cupertino CA, US

Assignee:

Advanced Cardiovascular Systems, Inc. - Santa Clara CA

International Classification:

A61F002/06

US Classification:

623 115

Abstract:

The present invention provides an improved stent design for repairing a vessel. The stent design incorporates crimpable, short non linear links which are flexible in three dimensions and which include flexible arms. The ability to accommodate both small deformations that occur during delivery and larger deformations that occur upon expansion within the vessel is enhanced without sacrificing stent crimp diameter. The link may incorporate a short flexible link with a perpendicular transition to provide added flexibility.

US Patent:

7060093, Jun 13, 2006

Filed:

May 26, 2004

Appl. No.:

10/855025

Inventors:

Kenny L. Dang - San Jose CA, US
Nazanine Matin - Palo Alto CA, US
Henjen Ho - San Jose CA, US

Assignee:

Advanced Cardiovascular Systems, Inc. - Santa Clara CA

International Classification:

A61F 2/06

US Classification:

623 142, 623 116

Abstract:

An implantable prosthesis, for example a stent, is provided having one or more elements that form the body structure of the prosthesis. The elements have a width that is variable from a nominal or conventional width to an increased width. The elements can have depots formed in the elements and are generally located at the increased width portions of the elements. Substances such as therapeutic substances, polymeric materials, polymeric materials containing therapeutic substances, radioactive isotopes, and radiopaque materials can be deposited into the depots.

US Patent:

7118592, Oct 10, 2006

Filed:

Sep 12, 2000

Appl. No.:

09/660812

Inventors:

Kenny L. Dang - San Jose CA, US
Han Juanta - Milpitas CA, US
Nazanine Matin - Palo Alto CA, US

Assignee:

Advanced Cardiovascular Systems, Inc. - Santa Clara CA

International Classification:

A61F 2/06

US Classification:

623 112, 623 146, 606194, 606198

Abstract:

A polymeric material such as polyurethane, PET, or ePTFE is used to cover an intravascular stent. The cover material has an overlapping portion which is slidable upon itself so that when the stent is expanded, the cover material does not contribute to stent foreshortening, if any. The cover material can be provided with holes to permit endothelialization and can be drug loaded to facilitate repair of a damaged vessel.

US Patent:

7887558, Feb 15, 2011

Filed:

Sep 28, 2004

Appl. No.:

10/951426

Inventors:

Arthur M. Lin - Fremont CA, US
Joseph N. Lamberti - Castro Valley CA, US
Kenny Dang - San Jose CA, US
Michael C. Stewart - San Jose CA, US
Charles J. Adam - San Jose CA, US
Justin N. Williams - San Jose CA, US

Assignee:

Maquet Cardiovascular LLC - San Jose CA

International Classification:

A61B 17/22

US Classification:

606159, 600 36

Abstract:

A vessel harvesting system that is suitable for harvesting target vessels such as the saphenous vein or radial artery for cardiac artery bypass graft surgery. The system includes a vessel harvesting tool with an elongated cannula and a plurality of surgical instruments therein for separating the target vessels from the surrounding tissue and side branches. The harvesting tool includes a modular handle unit with a base attached to the elongated cannula and a sled that can adapt the base to various types of vessel severing/securing tools, such as tissue welders, bipolar scissors, and bipolar bisectors. The handle unit may be relatively rigid and integrated with the various tool movement controls to facilitate one-handed operation by a user. A severing/securing tool rotation mechanism may be incorporated within the handle and operated by a thumbwheel or other such mechanism. The vessel harvesting system may also provide distal COinsufflation for enhanced maintenance of the operating cavity.