Roger James Perkins

US Patent:

6371928, Apr 16, 2002

Filed:

Oct 13, 1999

Appl. No.:

09/417228

Inventors:

Timothy B. Mcfann - Redwood City CA
Kathy M. Mah - Mountain View CA
James D. Passafaro - Los Gatos CA
Roger W. Perkins - San Jose CA
Joan Huynh - San Jose CA
Greg R. Patterson - Pleasanton CA
Ronald G. Williams - Menlo Park CA
David J. Kupiecki - San Francisco CA

Assignee:

Prolifix Medical, Inc. - Sunnyvale CA

International Classification:

A61B 500

US Classification:

600585, 600434

Abstract:

The present invention relates to a guidewire having a shaped three dimensional guide section. In the preferred embodiment the guide section is helical, and exerts an outward radial force on a lumen the guidewire is constrained in. The outward radial force can be measured or calculated according to methods of the present invention. Also described is a system comprising a guidewire and catheter where the force the catheter exerts on a body lumen can also be calculated. Apparatus and methods of making the guidewire are also disclosed, as well as alternative embodiments of the guidewire.

US Patent:

7285120, Oct 23, 2007

Filed:

May 27, 2004

Appl. No.:

10/855656

Inventors:

Karl S. Im - San Jose CA, US
John T. To - Newark CA, US
Roger W. Perkins - Sunnyvale CA, US

Assignee:

Venture Manufacturing, LLC - Santa Clara CA

International Classification:

A61B 18/18

US Classification:

606 41, 607122

Abstract:

A device and associated method for performing ablation procedures on anatomical structures accessible from within the chambers of the heart to form lesions that electrically isolate the tissue.

US Patent:

20020103446, Aug 1, 2002

Filed:

Jan 24, 2002

Appl. No.:

10/057708

Inventors:

Timothy McFann - Redwood City CA, US
Kathy Mah - Mountain View CA, US
James Passafaro - Los Gatos CA, US
Roger Perkins - San Jose CA, US
Joan Huynh - San Jose CA, US
Greg Patterson - Pleasanton CA, US
Ronald Williams - Menlo Park CA, US
David Kupiecki - San Francisco CA, US

Assignee:

PROLIFIX MEDICAL, INC. - Sunnyvale CA

International Classification:

A61B005/00

US Classification:

600/585000

Abstract:

The present invention relates to a guidewire having a shaped three dimensional guide section. In the preferred embodiment the guide section is helical, and exerts an outward radial force on a lumen the guidewire is constrained in. The outward radial force can be measured or calculated according to methods of the present invention. Also described is a system comprising a guidewire and catheter where the force of the catheter exerts on a body lumen can also be calculated. Apparatus and methods of making the guidewire are also disclosed, as well as alternative embodiments of the guidewire.

US Patent:

61395579, Oct 31, 2000

Filed:

Apr 12, 1999

Appl. No.:

9/290510

Inventors:

James D. Passafaro - Los Gatos CA
Larry B. Rogers - Half Moon Bay CA
Kathy M. Mah - Mountain View CA
Roger W. Perkins - San Jose CA
Joan Huynh - San Jose CA

Assignee:

Prolifix Medical, Inc. - Sunnyvale CA

International Classification:

A61B 1732

US Classification:

606159

Abstract:

An apparatus and method of making a guidewire with a preformed three dimensional profile is described. The Apparatus comprises a mandrel having a screw thread for receiving a core wire and at least one securing means for holding the core wire onto the mandrel. The core wire must be retained under tension in order to properly impart the desired shape into the core wire. A system and method of using the apparatus is disclosed comprising the steps of loading the core wire onto the mandrel, securing the core wire and mandrel and then heating the assembly until the wire takes the desired shape.

US Patent:

54704154, Nov 28, 1995

Filed:

Apr 8, 1993

Appl. No.:

8/045480

Inventors:

Roger W. Perkins - Fremont CA
Gerri L. Chatelain - Pleasanton CA

Assignee:

Devices for Vascular Intervention, Inc. - Redwood City CA

International Classification:

B29C 5700
B29C 6552
B29C 6900

US Classification:

156916

Abstract:

A vascular catheter includes a flexible catheter body having proximal and distal ends and an elongate housing secured to the distal end of the catheter body. An interactional device is disposed on one side of the housing, and at least two spaced-apart inflatable chambers are located on the other side of the housing generally at its proximal and distal ends, respectively. The inflatable chambers may be expanded simultaneously or separately, and the spaced-apart positioning of the chambers provides for stable positioning of the housing during atherectomy procedures, imaging procedures, and the like. The balloon is conveniently connected to the housing by an integral flange structure which is secured through an inflation aperture on the housing side. The balloon may be inflated through an annular inflation which is defined by a separate isolation tube disposed in the central lumen of the catheter body.

US Patent:

52229661, Jun 29, 1993

Filed:

Mar 3, 1992

Appl. No.:

7/845124

Inventors:

Roger W. Perkins - Fremont CA
Gerri L. Chatelain - Pleasanton CA

Assignee:

Devices for Vascular Intervention, Inc. - Redwood City CA

International Classification:

A61B 1720

US Classification:

606159

Abstract:

A vascular catheter includes a flexible catheter body having proximal and distal ends and an elongate housing secured to the distal end of the catheter body. An interactional device is disposed on one side of the housing, and at least two spaced-apart inflatable chambers are located on the other side of the housing generally at its proximal and distal ends, respectively. The inflatable chambers may be expanded simultaneously or separately, and the spaced-apart positioning of the chambers provides for stable positioning of the housing during atherectomy procedures, imaging procedures, and the like. The balloon is conveniently connected to the housing by an integral flange structure which is secured through an inflation aperture on the housing side. The balloon may be inflated through an annular inflation which is defined by a separate isolation tube disposed in the central lumen of the catheter body.