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Perfusion type balloon dilatation catheter, apparatus and method

  • US 4,771,777 A
  • Filed: 01/06/1987
  • Issued: 09/20/1988
  • Est. Priority Date: 01/06/1987
  • Status: Expired due to Term
First Claim
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1. In a perfusion-type balloon dilatation apparatus, a guiding catheter having proximal and distal extremities and having a fluid flow passage extending therethrough, a balloon dilatation catheter disposed in the guiding catheter, the balloon dilatation catheter comprising a flexible elongate tubular member having proximal and distal extremities and having inflation means extending therethrough, first and second inflatable balloons carried by the tubular member and having their interiors in communication with the inflation means in the tubular member, the first balloon being positioned within the guiding catheter, the second balloon being positioned adjacent the distal extremity of the tubular member, a fluid flow lumen carried by the tubular member extending through the first and second balloons and through the distal extremity of the tubular member, the fluid flow lumen having an opening proximal of the first balloon and opening into the interior of the guiding catheter and an adapter carried by the proximal extremity of the guiding catheter and providing a liquid-tight seal between the guiding catheter and the dilatation catheter and also providing an inlet through which liquid can be introduced so that it can travel through the flow passage in the guiding catheter and the fluid flow lumen in the dilatation catheter so that the liquid can flow through the fluid flow lumen beyond the second inflatable balloon.

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