Electrosurgery generator, electrosurgical system and method for operating an electrosurgery generator

摘要

According to the invention, an electrosurgical generator (12) is proposed which is configured to deliver a high-frequency alternating current to an electrosurgical instrument (14) for plasma cutting of body tissue (52) during operation. The electrosurgical generator (12) has outputs (18) for connecting an electrosurgical instrument (14), in order to supply an electrosurgical instrument (14) connected to the outputs (18) with a high-frequency alternating current and in order to have an impedance at the outputs (18) to determine connected load. The electrosurgery generator (12) has an impedance determination unit and a voltage detection unit (40) as well as an output voltage control unit (36). The output voltage control unit (36) is designed to control the output alternating voltage as a function of an output voltage maximum value which, during operation, is dependent on a The output value of the impedance determination unit and / or as a function of an output value of the voltage detection unit (40) is set so that the output voltage maximum value in an evaporation phase specifies a lower output AC voltage than in an ignition phase following the evaporation phase.