High-frequency surgical apparatus and a method for operating...

Details High-frequency surgical apparatus and a method for operating... High-frequency surgical apparatus and a method for operating...

2005-11-23

2010-02-23

Gibson, Roy D (Department: 3739)

Surgery

Instruments

Electrical application

C606S039000, C606S040000

Reexamination Certificate

active

07666182

ABSTRACT:
The invention relates to a high-frequency surgical apparatus in which, for the purpose of cutting and/or coagulating biological tissue by means of high-frequency current, a high-frequency generator having a first electrode and a second electrode forms a high-frequency circuit through the tissue being treated, with an electric arc being formed, said apparatus having a measuring device to detect DC voltage components forming in the high frequency circuit when the arc is formed, said DC voltage components being usable for controlling the high-frequency generator via a controlling device. The invention is characterized in that the measuring device has an arc-decoupling circuit which separates the DC voltage components in the positive half-cycle of the high-frequency AC voltage from the DC voltage components in the negative half-cycle of the high-frequency AC voltage and makes available at least one of the separated DC voltage components as a signal for subsequent processing in the controlling device. The invention also relates to a corresponding method of running such apparatus.

REFERENCES:
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patent: 5423810 (1995-06-01), Goble et al.
patent: 5849010 (1998-12-01), Wurzer et al.
patent: 5976128 (1999-11-01), Schilling et al.
patent: 2004/0230189 (2004-11-01), Keppel
patent: 0 391 233 (1990-10-01), None
patent: 0 709 065 (1996-05-01), None

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