Electrosurgical system, and ultrasound generator and ultrasound instrument for same

Abstract

An electrosurgical system having an ultrasound generator, configured to emit a high-frequency electrical signal, and an ultrasound instrument, including an ultrasound transducer configured to convert the signal into an ultrasound oscillation, wherein the generator is further configured to determine a resonance frequency of the transducer and adapt a frequency of the signal to the resonance frequency, and wherein the generator is further configured to detect a phase position between the current and the voltage of the signal and based on the detected phase position to determine whether the frequency of the signal corresponds to the resonance frequency. To enable the resonance frequency of the transducer to be determined correctly irrespective of component tolerances, the electrosurgical system is characterized in that the generator is configured to consider, during determination of the phase position, correction values, which are or can be stored in a memory of the generator and/or of the instrument.

Dependencies are inferred from the claim text.