Electrode

Details Electrode Electrode

1998-10-21

2000-12-19

Cohen, Lee

Surgery

Instruments

Electrical application

606 45, 606 49, A61B 1814

Patent

active

061622192

ABSTRACT:
The present invention is related to an electrode for destruction of biological tissue, suitably tumor tissue such as cancer. Prior art electrodes suffers from several disadvantages, such as e.g. a non-uniform current distribution, resulting in a oval and unpredictable destruction zone in the tissue. The present invention provides an electrode for destruction of biological tissue, comprising an electrical conductor (2) with a first thickness (t.sub.1), provided with electrical insulation (3) having a second thickness (t.sub.2), the conductor being connected to a current source at one end and electrically connected to an electrode head (4) at the other end of the conductor, where the electrode head serves for supplying current to the zone of the biological tissue, wherein the electrode head (4) is substantially spherical (5,10) with a diameter (D), where said diameter of the sphere is equal to or larger than said first thickness (t.sub.1). The advantage with the electrode of the present invention is above all the creation of a substantially symmetrical circular destruction zone.

REFERENCES:
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patent: 3532095 (1970-10-01), Miller et al.
patent: 3933616 (1976-01-01), Beer
patent: 4074718 (1978-02-01), Morrison, Jr.
patent: 4677990 (1987-07-01), Neubauer
patent: 5364393 (1994-11-01), Auth et al.
patent: 5527451 (1996-06-01), Edwards et al.
Brunelle et al, "A Bipolar Electrode for Vascular Electrocoagulation with Alternatin Current", Radiology, vol. 137, No. 1, ps 239-240, Oct. 1980.
Reidenbach et al, A new method for the endoscopic coagulation of mucous membrane lesions using high frequency electric currents, Biomed. techn. 23, ps 71-74, Apr. 1978.

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