Electrosurgical generator for controlling output in response to voltage and current phases and for sustaining microbubble formation

摘要

An electrosurgical generator (20) for supplying electrosurgical energy to tissue includes sensor circuitry (22,23) configured to measure a voltage phase and a current phase through tissue and a processing device (25) configured to compare the measured voltage and current phase to generate a real power component. The electrosurgical generator (20) also includes a controller (24) configured to regulate output of the electrosurgical generator (20) based on the real power component and/or a predetermined imaginary impedance of tissue.