Ablation catheter with improved tip cooling

Details Ablation catheter with improved tip cooling Ablation catheter with improved tip cooling

2005-12-30

2009-12-08

Cohen, Lee S (Department: 3739)

Surgery

Instruments

Electrical application

Reexamination Certificate

active

07628788

ABSTRACT:
A catheter has a catheter body having an outer wall, proximal and distal ends, and at least one lumen extending therethrough. A tip section distal the catheter body includes an irrigated tip electrode and a segment of flexible tubing with at least one lumen therethrough. The tip electrode has a stepped profile which provides laminar flow (or at least minimizes turbulent flow and eddies) of irrigation/cooling fluid over its surface, which in turn provides more uniform cooling of the tip electrode, particularly where the tip electrode is elongated. In one embodiment, the tip electrode has a longitudinal axis, an outer ring surface generally perpendicular to the longitudinal axis, and an outer cylindrical surface extending distally from the outer ring surface along the longitudinal axis. Openings are provided in the outer ring surface to permit fluid (e.g., saline) to pass from an interior of the tip electrode to the outer ring surface and flow in a laminar manner over the cylindrical surface.

REFERENCES:
patent: 6413256 (2002-07-01), Truckai et al.
patent: 2002/0198520 (2002-12-01), Coen et al.
patent: 2003/0004506 (2003-01-01), Messing
patent: 2004/0204707 (2004-10-01), Hood et al.
patent: 2004/0231683 (2004-11-01), Eng et al.
patent: 10030111 (2002-01-01), None
patent: WO 01/21069 (2001-03-01), None
patent: WO 2005/112814 (2005-01-01), None
European Search Report dated Oct. 4, 2007, for European Application No. 06256631.0, in the name of Biosense Webster, Inc.
European Search Report dated May 21, 2007, for European Application No. 06256632.8, in the name of Biosense Webster, Inc.

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