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Closed circulation tissue warming apparatus and method of using the same in prostate surgery

  • US 5,437,673 A
  • Filed: 02/04/1993
  • Issued: 08/01/1995
  • Est. Priority Date: 02/04/1993
  • Status: Expired due to Term
First Claim
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1. A method for performing cryoablation of the prostate while maintaining the temperature of surrounding healthy tissue, including urethral tissues, at near normal body temperature, said method comprising:

  • inserting a multi-lumen catheter through the urethra into the bladder,allowing body liquids to drain from the bladder through a central lumen of said catheter,pumping a temperature controlled warm liquid from a source of said warm liquid countercurrently through first and second communicating concentric passageways surrounding said central lumen of said catheter and back to said source,performing transperineal cryoablation of the prostate at a temperature of less than about -60°

    C. until the undesired tissue is destroyed, andmaintaining the flow of said warm liquid at a temperature and flow rate through said passageways sufficient to maintain the temperature of the bladder and surrounding healthy tissue at a temperature of about normal body temperature.

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