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

Patent metadata

Field	Value
Publication number	US-9028482-B2
Application number	US-201113186092-A
Country	US
Kind code	B2
Filing date	Jul 19, 2011
Priority date	Jul 19, 2011
Publication date	May 12, 2015
Grant date	May 12, 2015

Abstract

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.

First claim

What is claimed is:

1. A method for performing impedance matching during an electrosurgical procedure, comprising:
storing a plurality of pre-determined corrective regions each including a plurality of impedance values and corresponding to a pre-determined combination of selectively-activatable reactive elements;
measuring an impedance;
identifying a corrective region encompassing the measured impedance from the plurality of stored pre-determined corrective regions; and
dete…

Assignees

• Collins George J
• Covidien Lp

Inventors

• Collins George J

Classifications

• A61B2018/00595

  Human Necessities · mapped topic

• A61B18/1477

  Human Necessities · mapped topic

• A61B2018/00708

  Human Necessities · mapped topic

• A61B2018/00875

  Human Necessities · mapped topic

• A61B2018/141

  Human Necessities · mapped topic