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Method and apparatus for monitoring solid tissue heating

  • US 6,080,149 A
  • Filed: 01/09/1998
  • Issued: 06/27/2000
  • Est. Priority Date: 01/09/1998
  • Status: Expired due to Term
First Claim
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1. A power supply comprising:

  • a radio frequency power source having a power output, a power return, a voltage signal, and a current signal;

    means for calculating impedance based on the voltage and current signals; and

    an impedance display electronically coupled to said means for calculating impedance, said display having an image of a bar graph wherein said graph changes in length in response to changes in calculated impedance;

    wherein the image of the bar graph comprises light elements arranged in a nonlinear pattern, wherein a left hand portion of the array is horizontal and the right hand portion curves upwardly and the number of light elements illuminated increases in response to an increase in calculated impedance.

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