Fluid cooled ablation catheter

Details Fluid cooled ablation catheter Fluid cooled ablation catheter

A - Human Necessities

61

B

A61B 18/14 (2006.01) A61B 18/00 (2006.01) A61M 3/02 (2006.01) A61B 17/39 (1995.01)

Patent

CA 2149310

2149310 9411059 PCTABS00032 A thin, elongate and flexible ablation catheter (14), suitable for delivery to an internal organ, comprises a fluid delivery lumen (26) centrally located within the catheter (14), and first and second electrodes (18, 20) disposed on an outer surface of the catheter (14). The electrodes (18, 20) preferably are helically oriented about the catheter (14). At least one of the electrodes is in communication with a source of electro-surgical energy (12) so as to deliver ablative electro-surgical energy to tissue. The lumen (26) communicates with a fluid supply source (28) such that fluid is conveyed through the lumen (26) and is discharged to adjacent tissue during the delivery of ablative energy. The fluid delivered through the lumen (26) assists in optimizing the electrode temperature. A method and apparatus is also provided to regulate the fluid flow rate based on monitored electrode temperature and/or tissue impedance.

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