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System and method for patient temperature control employing temperature projection algorithm

  • US 20060095104A1
  • Filed: 12/12/2005
  • Published: 05/04/2006
  • Est. Priority Date: 02/09/1999
  • Status: Active Grant
First Claim
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1. A method of controlling the administration of a thermal therapy, comprising:

  • inserting a catheter having a heat transfer element positioned at a distal tip of the catheter into a blood vessel of a patient, the catheter having a supply lumen for supplying a working fluid to the heat transfer element and a return lumen for returning a working fluid from the heat transfer element;

    circulating a working fluid through the catheter and the heat transfer element, the working fluid having a temperature different from the patient temperature;

    receiving a signal from a temperature sensor mounted in one of the supply lumen or the return lumen;

    determining a control temperature based on the signal; and

    using the control temperature to control the temperature of the working fluid, wherein the temperature sensor is selected from the group consisting of thermistors, thermocouples, and combinations thereof, and further wherein the temperature sensor is two thermistors, and further comprising receiving a safety monitor signal from one of the two thermistors, and further comprising causing the working fluid to stop circulating if a value of control temperature measured by the safety monitor signal falls outside a predetermined range.

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