Electrosurgical device

Details Electrosurgical device Electrosurgical device

1975-01-23

1980-12-09

Cohen, Lee S.

Surgery

Truss

Pad

12830317, 361 42, A61B 1736

Patent

active

042378877

ABSTRACT:
A radio-frequency electrosurgical device which includes an active electrode, a passive electrode, and means for generating a radio-frequency potential. The generating means induces the radio-frequency potential on a primary winding of an isolation transformer. The secondary winding of the isolation transformer powers the active electrode. One end of the secondary winding of the isolation transformer is coupled to a return lead connected to the passive electrode and also is coupled to ground through a primary winding of a second transformer. If the passive electrode is disconnected from the return line, there can be an alternate radio-frequency current return path to ground, and a potential is developed across the primary winding of the second transformer. This potential is used to energize a relay to actuate an alarm and to disable the radio-frequency generator if the passive electrode becomes disconnected.

REFERENCES:
patent: 3683923 (1972-08-01), Anderson
patent: 3812858 (1974-05-01), Oringer
patent: 3905373 (1975-09-01), Gonser

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