Microwave and RF ablation system and related method for dynamic impedance matching

摘要

An electrosurgical system and method for performing electrosurgery is disclosed. The electrosurgical system includes an electrosurgical generator adapted to supply electrosurgical energy to tissue. The electrosurgical system includes an electrosurgical instrument, such as an electrosurgical antenna, knife, forceps, suction coagulator, or vessel sealer. The disclosed system includes an impedance sensor, a controller, dynamic impedance matching network, and an electrosurgical energy generator. The dynamic impedance matching network includes a PIN diode switching array configured to selectively activate a plurality of reactive elements. The disclosed arrangement of reactive elements provides real-time impedance correction over a wide range of impedance mismatch conditions.

主权项

1. An electrosurgical system, comprising:
a controller configured to:
store a plurality of pre-determined corrective regions each including a plurality of impedance values and corresponding to a combination of reactive elements;receive an impedance measurement signal;identify a pre-determined corrective region encompassing the impedance measurement signal from the plurality of pre-determined corrective regions; andoutput an impedance matching control signal in response to the predetermined corrective region; an impedance measurement module configured to sense an impedance of an electrosurgical transmission line, wherein the impedance measurement module is in operable communication with the controller; a dynamic impedance-matching network configured to receive the impedance matching control signal, wherein the dynamic impedance-matching network includes:
a plurality of reactive elements switchably coupled to the electrosurgical transmission line; anda switching array comprising switching elements configured to selectively switch at least one of the plurality of reactive elements in accordance with the impedance matching control signal; an electrosurgical generator configured to generate an electrosurgical signal; an electrosurgical instrument operably coupled to the electrosurgical generator via the electrosurgical transmission line.