Electrosurgery equipment

Details Electrosurgery equipment Electrosurgery equipment

1992-09-01

1993-09-21

Cohen, Lee S.

Surgery

Instruments

Electrical application

128908, A61B 1739

Patent

active

052464393

ABSTRACT:
Electrosurgery equipment has an alarm circuit for detecting when a return plate electrode is incorrectly attached. Capacitive dividers are connected between ground and each of the power supply line to the active electrode and the power supply return line from the plate electrode. The outputs of the capacitive dividers are supplied to the two inputs of a differential amplifier which provides an output to one input of a comparator. Another input of the capacitor is connected to a reference source. When the output of the differential amplifier rises above the reference source, the comparator produces an alarm signal which inhibits the power supply and gives an audible alarm.

REFERENCES:
patent: 3897787 (1975-08-01), Ikuno et al.
patent: 3923063 (1975-12-01), Andrews et al.
patent: 4094320 (1978-06-01), Newton et al.
patent: 4122854 (1978-10-01), Blackett
patent: 4231372 (1980-11-01), Newton
patent: 4662369 (1987-05-01), Ensslin
patent: 4741334 (1988-05-01), Irnich

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