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System and method for monitoring ablation size

  • US 10,004,559 B2
  • Filed: 11/04/2014
  • Issued: 06/26/2018
  • Est. Priority Date: 10/27/2009
  • Status: Active Grant
First Claim
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1. A method for monitoring tissue ablation, the method comprising:

  • transmitting microwave energy from a power source to a microwave antenna to form a tissue ablation zone;

    measuring complex impedance associated with the microwave antenna as the tissue ablation zone forms;

    generating a control signal based on a comparison of the measured complex impedance with a threshold value of complex impedance corresponding to at least one desired property of the tissue ablation zone; and

    adjusting at least one property of the microwave energy transmitted from the power source to the microwave antenna in response to the comparison,wherein adjusting at least one property includes adjusting at least one property of the microwave energy selected from the group consisting of voltage, current, power, and impedance.

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