Power control for beam-type electrosurgical unit

Details Power control for beam-type electrosurgical unit Power control for beam-type electrosurgical unit

1988-07-26

1990-02-20

Cohen, Lee S.

Surgery

Instruments

Electrical application

21912154, 21912157, A61B 1739

Patent

active

049017209

ABSTRACT:
An electrosurgical generator in an electrosurgical unit (ESU) controls the repetition rate and the energy content of bursts of RF energy delivered to a gas jet supplied by the ESU, in order to maintain RF leakage current within acceptable limits while still achieving a sufficient state of ionization in the gas jet to reliably initiate the conduction of arcs to the tissue. The repetition rate of the RF bursts is substantially reduced in an inactive state when no arcs are delivered. A relatively small number of the RF bursts delivered during the inactive state have an increased or boosted energy content to assure an adequate ionization state in the gas jet.

REFERENCES:
patent: 4040426 (1977-08-01), Morrison, Jr.
patent: 4060088 (1977-11-01), Morrison, Jr. et al.
patent: 4781175 (1988-11-01), McGreevy et al.
Dennis et al., "Evaluation of Electrofulfuration . . . ", Digestive Diseases & Sciences, vol. 24, No. 11, pp. 843-848, Nov. 1979.

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