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Device and method for preventing restenosis

  • US 6,223,085 B1
  • Filed: 05/06/1997
  • Issued: 04/24/2001
  • Est. Priority Date: 05/06/1997
  • Status: Expired due to Term
First Claim
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1. A method of preventing restenosis of a blood vessel comprising:

  • inserting and advancing a catheter through a cardiovascular system until a distal portion of the catheter extends across a stenotic region within the blood vessel of the system;

    forcing contact between the stenotic region and a dilatation balloon located in the distal portion of the catheter;

    cooling the inner wall surface of the blood vessel in the stenotic region with a first fluid circulating within the dilatation balloon; and

    heating a portion of the blood vessel in the stenotic region with microwave energy from a microwave antenna within the distal portion of the catheter at a temperature above about 45°

    C. for a period of time sufficient to substantially destroy a portion of the blood vessel in the stenotic region while cooling the inner wall surface of the blood vessel with the first fluid circulating within the dilatation balloon.

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