Bipolar RF generator

Details Bipolar RF generator Bipolar RF generator

1992-06-04

1994-06-07

Pellegrino, Stephen C.

Surgery

Instruments

Electrical application

606 34, 606 37, A61B 1739

Patent

active

053185633

ABSTRACT:
An electrosurgical bipolar RF generator apparatus includes a bipolar electrode. An aperiodic sequence of uniform width bursts of a high frequency signal are electronically synthesized. Substantially identical decaying amplitude envelopes are impressed on the bursts of the high frequency signal. Each of the envelopes has a predetermined rate of change from a preselected initial amplitude. The impressed bursts of the high frequency signal are applied to the electrode. The electrical apparatus operates in a cut mode or a coagulation mode. The apparatus includes a power supply for providing a variable DC voltage, a short circuit detect circuit for detecting a short circuit at the bipolar electrode, and an open circuit detector for detecting an open circuit at the bipolar electrode.

REFERENCES:
patent: 4590934 (1986-05-01), Malis et al.
patent: 4716897 (1988-01-01), Noguchi et al.
patent: 4727874 (1988-03-01), Bowers et al.
patent: 4903696 (1990-02-01), Stasz et al.
patent: 4934377 (1990-06-01), Bova et al.

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