Catheter for RF ablation having cooled electrode with electrical

Details Catheter for RF ablation having cooled electrode with electrical Catheter for RF ablation having cooled electrode with electrical

1994-10-07

1996-08-13

Cohen, Lee S.

Surgery

Instruments

Electrical application

607 99, 607105, 607113, 607122, A61B 1739, A61N 105

Patent

active

055451616

ABSTRACT:
A catheter for radio frequent ablation of tissue which includes a flexible elongate member having proximal and distal extremities. The flexible elongate member is provided with a lumen in the distal extremity. A metal conducting electrode is secured to the distal extremity of the elongate member and has first and second extremities. The electrode is provided with a chamber therein which is in communication with the lumen. A conductor extends through the elongate member from the proximal to distal extremities for supplying radio frequency energy to the electrode. Coolant is disposed in the chamber and in contact with the electrode for dissipating heat created in the electrode by the application of radio frequency energy thereto. A sleeve made from an electrically insulating material extends over at least the first extremity of the electrode.

REFERENCES:
patent: 3044836 (1962-07-01), Conlon
patent: 4517975 (1985-05-01), Garito et al.
patent: 4945912 (1990-08-01), Langberg
patent: 5230349 (1993-07-01), Langberg
patent: 5234004 (1993-08-01), Hascoet et al.
patent: 5348554 (1994-09-01), Imran et al.
patent: 5382247 (1995-01-01), Cimino et al.
An, et al., JACC, vol. 11, No. 2, Feb. 1988: 17A Abstracts, "Ventricular ablation with radiofrequency energy:comparison of different catheter energy delivery systems".
Huang, et al., Supplement II circulation, vol. 80, No. 4, Oct. 1989; abstract "Increase in the lesion size and decrease in the impedance rise with a saline infusion electrode cathteter for radiofrequency catheter ablation".

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