Device and method for multi-phase radio-frequency ablation

Details Device and method for multi-phase radio-frequency ablation Device and method for multi-phase radio-frequency ablation

1994-10-05

1997-12-02

Kamm, William E.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Thermal applicators

607101, 607122, 607154, 606 31, 606 42, A61N 500

Patent

active

056930780

ABSTRACT:
Multi-phase RF ablation employing a two-dimensional or three-dimensional electrode array produces a multitude of currents paths on the surface of the ablation zone. This results in a uniform lesion with a size defined by the span of the electrode array. An orthogonal electrode catheter array suitable for cardiac ablation is used in conjunction with a two-phase RF power source to produce uniform square-shaped lesions of size 1.2 cm.sup.2. Lesions of larger size are created by successive adjacent placement of the square-shaped lesions. A temperature sensor at the electrode tip allows monitoring of ablation temperature and regulation of thereof to minimize the electrode tips from being fouled by coagulum.

REFERENCES:
patent: 4365639 (1982-12-01), Goldreyer
patent: 4565200 (1986-01-01), Cosman
patent: 4660571 (1987-04-01), Hess et al.
patent: 4940064 (1990-07-01), Desai
patent: 5122137 (1992-06-01), Lennox
patent: 5156151 (1992-10-01), Imran
patent: 5383917 (1995-01-01), Desai et al.

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