SYSTEMS AND METHODS FOR NARROWBAND REAL IMPEDANCE CONTROL IN ELECTROSURGERY

摘要

The electrosurgical systems and associated methods of the present disclosure perform narrowband real impedance control for precise treatment of tissue in electrosurgery. The electrosurgical systems include an electrosurgical generator that includes an output stage configured to generate electrosurgical energy to treat tissue, a plurality of sensors configured to sense voltage and current waveforms of the electrosurgical energy, and a controller coupled to the output stage to control the generated electrosurgical energy. The controller includes a signal processor that (1) determines a complex-valued voltage and a complex-valued current based on the voltage waveform and the current waveform sensed by the plurality of sensors using a plurality narrowband filters, and (2) calculates a real part of an impedance of the tissue using the complex-valued voltage and the complex-valued current. The controller also includes an output controller that controls the output stage based on the calculated real part of the impedance of the tissue.

主权项

1. An electrosurgical generator comprising:
an output stage configured to generate electrosurgical energy to treat tissue; a plurality of sensors configured to sense a voltage waveform and a current waveform of the electrosurgical energy; and a controller coupled to the output stage and the plurality of sensors and configured to control the generated electrosurgical energy, the controller comprising:
a signal processor configured to (1) determine a complex-valued voltage and a complex-valued current based on the voltage waveform and the current waveform sensed by the plurality of sensors using a plurality of narrowband filters, and (2) calculate a real part of an impedance of the tissue using the complex-valued voltage and the complex-valued current; andan output controller configured to control the output stage based on the calculated real part of the impedance of the tissue.