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Balloon catheter with cutting edge

  • US 5,616,149 A
  • Filed: 03/28/1994
  • Issued: 04/01/1997
  • Est. Priority Date: 07/03/1990
  • Status: Expired due to Term
First Claim
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1. A device for dilating or recanalizing a vessel comprising:

  • a catheter guidewire having a shaft, a proximal end and a distal end, and containing at least one groove at the distal end;

    an inflatable balloon sitting within the guidewire groove;

    a cutting edge mounted on the balloon and situated within the guidewire grove;

    a system of lumens in the guidewire shaft connected to the balloon and serving to allow inflation of the balloon such that the cutting edge extends out beyond the guidewire and penetrates into the vessel wall; and

    a conventional balloon catheter positioned over the guidewire proximal to the cutting edge such that it can be advanced to dilate the previously cut vessel.

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