Catheter for RF ablation with cooled electrode and method

Details Catheter for RF ablation with cooled electrode and method Catheter for RF ablation with cooled electrode and method

1995-01-31

1997-08-19

Cohen, Lee S.

Surgery

Instruments

Electrical application

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

Patent

active

056582781

ABSTRACT:
A catheter for radio frequency ablation with a cooled electrode for use in tissue having a surface comprising an elongate member having proximal and distal extremities. A metal conducting electrode secured to the distal extremity of the elongate member and having a chamber therein. A conductor extends through the elongate member from the proximal to the distal extremity for supplying radio frequency energy to the electrode. The elongate member has a lumen in the distal extremity which is in communication with the chamber. A 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.

REFERENCES:
patent: 4907589 (1990-03-01), Cosman
patent: 5230349 (1993-07-01), Langberg
patent: 5281213 (1994-01-01), Milder
patent: 5334193 (1994-08-01), Nardella
patent: 5423811 (1995-06-01), Imren et al.
Wittkampf et al, "Radiofrequency Ablation . . . Catheter", JACC, vol. 11, No. 2, Feb. 1988: 17A Abstracts.
Huang, et al. "Increase in the lesion size and decrease in the impedance rise with a saline infusion electrode catheter for radiofrequency catheter ablation" (Circulation, vol. 80, No. 4, Oct. 1989, Supplement II.
Borggrefe, et al., "High frequency alternating current ablation of an accessory pathway in humans" (JACC, vol. 10, No. 3, Sep. 1987:576-82).

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