Electric knife device

Details Electric knife device Electric knife device

1976-12-16

1978-07-25

Michell, Robert W.

Surgery

Truss

Pad

12830317, A61N 302

Patent

active

041023412

ABSTRACT:
An electric knife device comprises a high frequency current source, a knife electrode, a patient electrode opposed to the knife electrode, a first wire coupling one output of the high frequency source and the knife electrode, a second wire coupling the other output of the high frequency source and the patient electrode, first and second current detectors for detecting the currents flowing through the first and second wires, respectively, a division circuit for calculating the ratio between the outputs of the first and second current detectors, the current flowing through the first wire being controlled when the ratio calculated by the division circuit becomes lower than a predetermined value.

REFERENCES:
patent: 3601126 (1971-08-01), Estes
patent: 3634652 (1972-01-01), Shimizu et al.
patent: 3683923 (1972-08-01), Anderson
patent: 3885569 (1975-05-01), Judson
patent: 3897787 (1975-08-01), Ikuno et al.
patent: 3923063 (1975-12-01), Andrews et al.

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