Patent ID: 8920412

Claim:
An electrosurgical generator for the coagulation of biological tissue by means of an inert gas plasma coagulation instrument, comprising a generator part which supplies a high-frequency treatment current with a high-frequency voltage set according to a voltage control signal such that electrical energy is supplied to the biological tissue; a measuring device for detecting the high-frequency treatment current and the high-frequency voltage for generating a corresponding current signal and a corresponding voltage signal; a conversion device to which the current signal and the voltage signal are fed and which is configured such that a real current signal corresponding to the real component of the high-frequency treatment current is formed from the current signal and the voltage signal; and a regulation device which compares the real current signal with a pre-settable target value and generates the voltage control signal on the basis of the comparison, wherein the real component of the high-frequency treatment current is adjustable according to the target value for ensuring a tissue treatment that is independent of a distance between the tissue and an electrode of the inert gas plasma coagulation instrument when performing a contactless coagulation procedure.