High-frequency surgical instrument

Details High-frequency surgical instrument High-frequency surgical instrument

1987-11-16

1988-12-06

Cohen, Lee S.

Surgery

Truss

Pad

128908, A61B 1739

Patent

active

047889772

ABSTRACT:
Described is a safety circuit for a high-frequency surgical instrument for the monopolar cutting and coagulating of biological tissue, where the neutral electrode is high-frequency-grounded through a capacitor. The safety circuit monitors the low-frequency leakage current which flows through the capacitor against the ground potential and interrupts the electric connection between this capacitor and ground potential immediately when the low-frequency leakage current exceeds an adjustable limiting value. Simultaneously, an optical signal and an acoustical signal are activated.

REFERENCES:
patent: 4122854 (1978-10-01), Blackett
patent: 4231372 (1980-11-01), Newton
patent: 4303073 (1981-12-01), Archibald
patent: 4331149 (1982-05-01), Gonser

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