Yi I Yang

US Patent:

6357447, Mar 19, 2002

Filed:

Oct 26, 1999

Appl. No.:

09/428237

Inventors:

David K. Swanson - Cupertino CA
Yi Yang - San Francisco CA
James G. Whayne - Saratoga CA
Josef V. Koblish - Sunnyvale CA

Assignee:

EP Technologies, Inc. - San Jose CA

International Classification:

A61B 1900

US Classification:

128898, 600374, 606 41

Abstract:

A method for manufacturing a catheter assembly including a handle, a guide tube having a proximal end engaged with the handle, and a distal end assembly engaged with a distal end of the guide tube. The method includes applying an active electrode element on the distal end assembly by a process selected from the group consisting of electroplating, vapor deposition, IBAD and pad printing, and applying a regenerated cellulose coating over the distal end assembly. The regenerated cellulose coating is applied by applying a viscous liquid coating to the catheter distal end assembly, regenerating the viscous coating, and then curing the regenerated coating. The cured coating is preferably hydrated.

US Patent:

6402746, Jun 11, 2002

Filed:

Mar 13, 2000

Appl. No.:

09/523685

Inventors:

James G Whayne - Saratoga CA
Sidney D Fleischman - Menlo Park CA
Russell B Thompson - Los Altos CA
David K Swanson - Mountain View CA
Yi Yang - San Francisco CA

Assignee:

EP Technologies, Inc. - San Jose CA

International Classification:

A61B 1818

US Classification:

606 41, 607122, 128898

Abstract:

A catheter assembly comprises a first branch body having a first axis, a second branch body extending in a non-parallel relationship with respect to the first axis, and at least one electrode carried by the second branch body. In use, the first branch body can be located within a pulmonary vein within the left atrium, while the electrode carried by the second branch body is located in contact with endocardial tissue outside the pulmonary vein. Ablation energy can be transmitted from the electrode to contacted endocardial tissue while the first branch body is located within the pulmonary vein.

US Patent:

6454758, Sep 24, 2002

Filed:

Feb 21, 2000

Appl. No.:

09/510437

Inventors:

Russell B. Thompson - Los Altos CA
David L. McGee - Sunnyvale CA
James G. Whayne - Saratoga CA
Yi Yang - San Francisco CA
Sidney D. Fleischman - Menlo Park CA

Assignee:

EP Technologies, Inc. - San Jose CA

International Classification:

A61M 2501

US Classification:

604528, 604 22

Abstract:

A catheter assembly comprises a sheath, which includes a side wall enclosing an interior bore, a distal region, and an opening in the sidewall. The assembly also comprises a bendable catheter tube, which is carried for sliding movement in the interior bore. The catheter tube has a distal portion. The assembly further comprises a coupling, which joins the distal region of the sheath and the distal portion of the catheter tube. The coupling causes bending of the catheter tube outwardly through the opening, in response to sliding movement of the catheter tube within the interior bore toward the distal region of the sheath.

US Patent:

6547818, Apr 15, 2003

Filed:

Oct 20, 2000

Appl. No.:

09/693334

Inventors:

Jonathan M. Rourke - Los Altos CA
Yi Yang - San Francisco CA

Assignee:

Endotex Interventional Systems, Inc. - Cupertino CA

International Classification:

A61F 206

US Classification:

623 116

Abstract:

A coiled-sheet stent includes a tubular body having a longitudinal axis, a circumference, and a thickness, and having a size configured for introduction into a body lumen. The tubular body includes a plurality of cylindrical bands, each band including a generally zig-zag pattern defined by a series of sequential arcuate-shaped diagonal elements connected to one another and extending about the circumference. Longitudinal connectors extend between adjacent cylindrical bands. Slots are formed in the tubular body oriented about the circumference of the tubular body, thereby providing reduced thickness regions in the longitudinal connectors that have a thickness that is substantially smaller than the thickness of the cylindrical bands of the tubular body.

US Patent:

6673290, Jan 6, 2004

Filed:

Nov 12, 1998

Appl. No.:

09/189918

Inventors:

James G. Whayne - Saratoga CA
Yi Yang - San Francisco CA
Patrick M. Owens - Cupertino CA
David K. Swanson - Mountain View CA

Assignee:

SciMed Life Systems, Inc. - Maple Grove MN

International Classification:

B29C 4114

US Classification:

264135, 264255, 264275, 264305, 264317, 264318, 264DIG 44

Abstract:

Methods of manufacturing cellulosic structures, e. g. , for use in expandable-collapsible electrode assemblies for diagnostic and/or therepeutic electrophysiology devices, are disclosed. One such preferred method includes providing a mandrel having a head portion and a neck portion, the head portion having an outer circumference greater than the neck portion, dipping the mandrel into a cellulosic substance, curing the cellulosic substance, and separating the mandrel from the cured cellulosic substance.

US Patent:

6676701, Jan 13, 2004

Filed:

Aug 13, 2001

Appl. No.:

09/929474

Inventors:

Jonathan M. Rourke - Los Altos CA
Yi Yang - San Francisco CA

Assignee:

Endotex Interventional Systems, Inc. - Cupertino CA

International Classification:

A61F 204

US Classification:

623 139, 623 12

Abstract:

A prosthesis for treating a body passage includes a micro-porous tubular element and a support element. The tubular element is formed from a thin-walled sheet having a wall thickness of 25 micrometers or less, preferably a coiled-sheet exhibiting temperature-activated shape memory properties. The mesh pattern includes a plurality of openings in the sheet having a maximum dimension of not more than about 200 micrometers, thereby acting as a filter trapping embolic material while facilitating endothelial growth therethrough. The support element includes a plurality of struts, preferably having a thickness of 100-150 micrometers. The support element is preferably an independent component from the tubular element. Alternatively, the support element may be attached to or integrally formed as part of the tubular element. The tubular and support elements are placed on a catheter in contracted conditions and advanced endoluminally to a treatment location within a body passage.

US Patent:

6917834, Jul 12, 2005

Filed:

Oct 10, 2001

Appl. No.:

09/975393

Inventors:

Josef V. Koblish - Sunnyvale CA, US
Russell B. Thompson - Los Altos CA, US
James G. Whayne - Saratoga CA, US
Yi Yang - San Francisco CA, US
David K. Swanson - Mountain View CA, US
Sidney D. Fleischman - Menlo Park CA, US

Assignee:

Boston Scientific SciMed, Inc. - Maple Grove MN

International Classification:

A61N001/00

US Classification:

607122, 607105, 607106, 607113, 606 41

Abstract:

Devices and methods are provided for creating lesions in endocardial tissues surrounding a vessel opening to thereby isolate focal arrhythmia substrates, including an invasive catheter assembly comprising an elongate body having a longitudinal axis and first and second lumens, a first catheter having a distally mounted expandable anchor body disposed in the first lumen, and a second catheter having a distally mounted electrode disposed in the second lumen, the elongate body having a first distal opening accessing the first lumen through which the first catheter may be extended axially relative to the longitudinal axis of the elongate body and a second distal opening accessing the second lumen through which the second catheter may be extended at an angle relative to the longitudinal axis of the elongate body. The disclosed invention also includes an elongate catheter having an expandable electrode body mounted on one end, wherein the electrode body is configured to form an enlarged circumferential region when expanded, the enlarged circumferential region defining a distal facing surface of the electrode body, the distal facing surface including an area configured to emit radio frequency (RF) energy.

US Patent:

6945989, Sep 20, 2005

Filed:

Sep 18, 2000

Appl. No.:

09/664970

Inventors:

Rainier Betelia - San Jose CA, US
Edward M Gillis - Cupertino CA, US
Jonathan M. Rourke - Los Altos CA, US
Yi Yang - San Francisco CA, US

Assignee:

Endotex Interventional Systems, Inc. - Cupertino CA

International Classification:

A61F002/06

US Classification:

623 111

Abstract:

An apparatus for delivering a stent into a blood vessel includes a sheath having a rounded bullet-shaped distal portion including a plurality of flexible leaflets integrally molded thereto. The stent is disposed in its contracted condition within a lumen of the sheath proximate the distal portion. A bumper is slidably disposed within the lumen that includes a helical compression coil, a bumper element attached to the helical coil including a blunt distal edge for abutting the stent, and an extension element extending distally from the bumper element through the stent and between the leaflets to facilitate introducing the apparatus over a guidewire. The sheath is formed by inserting a bullet into a blunt-ended tube, and inserting the tube into a bullet-shaped bore in a heated die until the tube material is softened and deforms into a rounded bullet shape. Slits are then cut into the distal portion to create the leaflets.