Method for controlling power during electrosurgery

Details Method for controlling power during electrosurgery Method for controlling power during electrosurgery

1975-06-02

1977-05-17

Grimm, Siegfried H.

Modulators

Amplitude modulator

Nonlinear device controlled by modulating signal

12830314, 12830317, A61N 302, H03K 708

Patent

active

040244679

ABSTRACT:
A control circuit forelectrosurgical units establishes a particular output signal to patient electrodes in response to condition of the patient electrodes. The duty cycle of the output signal is reduced when the patient electrodes are not in contact with the patient so as to prevent unwanted cutting and the duty cycle is increased when both patient electrodes are in contact with the patient so as to maximize the coagulation effect.
The invention includes method of adjusting coagulation power by varying the duty cycle and not the amplitude of the output signal.

REFERENCES:
patent: 3478744 (1969-11-01), Leiter
patent: 3658067 (1972-04-01), Bross
patent: 3675655 (1972-07-01), Sittner

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