Surgery – Instruments – Electrical application
Patent
1995-11-08
1999-02-09
Peffley, Michael
Surgery
Instruments
Electrical application
606 34, A61B 1736
Patent
active
058687394
ABSTRACT:
A system for controlling the operation of a high frequency biological tissue cutting device for cutting biological tissue with high-frequency current having a HF generator component designed so that the amplitude of the voltage (UG) applied to the tissue can be changed. At least one adjustment device is provided to adjust one of the characteristic values (K) of the high frequency generator component to a 1st desired value (b), related to the output of an indicator device that indicates by an electrical signal (d) the size and intensity of the electric arc occurring between the surgical probe and the tissue during cutting. A desired-value transmitter provides a second desired value (c) representing the desired size and intensity of the electric arc. An evaluation unit receives the output signal (d) of the indicator device and the 2nd desired value representing the intensity of the electric arc (c) and provides therefrom a desired value (b) output for the adjustment device such that the maximum changing speed of the desired value (b) is at least one magnitude smaller than the speed with which the adjustment device adjusts the characteristic value (K) of the high-frequency generator component.
REFERENCES:
patent: 4209018 (1980-06-01), Meinke et al.
patent: 4474179 (1984-10-01), Koch
patent: 4860745 (1989-08-01), Farin et al.
patent: 5108391 (1992-04-01), Flachenecker
patent: 5133711 (1992-07-01), Hagen
patent: 5167658 (1992-12-01), Ensslin
patent: 5167660 (1992-12-01), Altendorf
Fastenmeier Karl
Flachenecker, deceased Gerhard
Lindenmeier Heinz
Lohr Georg
Karl Storz GmbH & Co.
Mon Donald D.
O'Reilly David
Peffley Michael
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