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System, method and apparatus for evaluating tissue temperature

  • US 7,729,778 B2
  • Filed: 09/30/2005
  • Issued: 06/01/2010
  • Est. Priority Date: 01/18/2002
  • Status: Expired due to Fees
First Claim
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1. A temperature responsive untethered sensor implant for evaluating a temperature rise from a monitoring temperature or temperatures to a set point temperature comprising:

  • a core component exhibiting a relative permeability characteristic elevating in value with a corresponding elevation in monitoring temperatures and exhibiting a Curie temperature above said monitoring temperatures corresponding with said set point temperature;

    an inductive winding with turns wound about said core component to define an inductive component;

    a capacitor coupled with said inductive winding to define a resonant circuit electromagnetically excitable to have a resonating output at a select resonant center frequency and exhibiting a decrease in the intensity of said resonating output at said select resonant center frequency when at temperatures approaching at said Curie temperature.

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