Electrosurgical device

Details Electrosurgical device Electrosurgical device

1976-06-28

1982-05-25

Cohen, Lee S.

Surgery

Truss

Pad

12830317, 361 42, A61B 1736

Patent

active

043311490

ABSTRACT:
A radio-frequency electrosurgical device which includes an active electrode, a passive electrode, and a radio-frequency generator. The radio-frequency generator induces a 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 second 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: 3478744 (1969-11-01), Leiter
patent: 3675655 (1972-07-01), Sittner
patent: 3683923 (1972-08-01), Anderson
patent: 3707149 (1972-12-01), Hao et al.
patent: 3812858 (1974-05-01), Oringer
patent: 4231372 (1980-11-01), Newton

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