Electro-surgical unit control apparatus

Details Electro-surgical unit control apparatus Electro-surgical unit control apparatus

A - Human Necessities

61

B

327/117, 326/16,

A61B 17/39 (1985.01)

Patent

CA 1205875

-1- ABSTRACT A control unit for an electro-surgical unit (E.S.U.) used in a transurethral resection has an electrical circuit formed from the E.S.U. to a NiCr cutting loop through a prostate gland load to an electroplate and thence via a return wire to the E.S.U. The present invention takes advantage of the fact that the resistive load presented by the prostate gland varies according to the tissue contacted by the NiCr loop. The electrical path between the E.S.U and the NiCr loop is provided with a current sensing probe connected to a microprocessor control unit which is arranged to be inputted with stored data values indictive of the NiCr loop touching the capsule and upon such a condition being determined by the control unit so an output signal is applied to a relay to open circuit the current path from the E.S.U. to the NiCr loop.

429038

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