David A Aldridge

US Patent:

20110306959, Dec 15, 2011

Filed:

Jun 15, 2011

Appl. No.:

13/161356

Inventors:

Brad M. Kellerman - Escondido CA, US
David Trottingwolf Aldridge - Laguna Hills CA, US
David K. Wrolstad - Yucaipa CA, US
Mark A. Ritchart - Murrieta CA, US
Jeffrey E. Hull - Midlothian VA, US

Assignee:

BAJA RESEARCH, LLC. - San Clemente CA
CAYMUS MEDICAL, INC. - Murrieta CA

International Classification:

A61B 18/04

US Classification:

606 28

Abstract:

A device for creating an arteriovenous (AV) fistula comprises an elongate member, a distal member connected to the elongate member and movable relative to the elongate member, and a heating member disposed on at least one of the movable distal member and the elongate member. The distal member comprises structure for capturing tissue to be cut to create the fistula, and the heating member is adapted to cut through the tissue to create the fistula. The elongate member comprises an elongate outer tube. A shaft connects the distal member to the elongate member, and is extendable and retractable to extend and retract the distal member relative to the elongate member.

US Patent:

20130281998, Oct 24, 2013

Filed:

Feb 8, 2013

Appl. No.:

13/763501

Inventors:

Brad M. Kellerman - Escondido CA, US
David Trottingwolf Aldridge - Laguna Hills CA, US
David K. Wrolstad - Yucaipa CA, US
Mark A. Ritchart - Murrieta CA, US
Jeffrey E. Hull - Midlothian VA, US
Gene Reu - San Juan Capistrano CA, US

Assignee:

Baja Research, LLC - San Juan Capistrano CA
Caymus Medical, Inc. - San Juan Capistrano CA

International Classification:

A61B 18/04
A61B 18/08

US Classification:

606 29, 606 28

Abstract:

A catheter-based device tracks over a guidewire which has been placed from a first blood vessel into a second blood vessel. The distal tip of the catheter is advanced into the second vessel while a proximal member remains in the first vessel. Matching blunt tapered surfaces on each of the distal tip and the proximal member are clamped together, with adjacent walls of each vessel between them, after which a known, controlled pressure is applied between the two surfaces. Heat energy is then applied to the blunt surfaces for approximately 1-30 seconds to weld the walls of the two vessels together. After coaptation of the vessel walls, the heat is increased to then cut through the vessel walls to create a fistula of the desired size.