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Active perfusion dilatation catheter

  • US 5,807,331 A
  • Filed: 04/24/1996
  • Issued: 09/15/1998
  • Est. Priority Date: 04/20/1994
  • Status: Expired due to Term
First Claim
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1. An active perfusion dilatation catheter system for dilating a site within a patient'"'"'s vascular system while actively perfusing a perfusion fluid from outside the patient'"'"'s body to a location distal from said site, comprising:

  • a dilatation catheter with a catheter shaft having proximal and distal portions and at least one inflation lumen extending longitudinally therethrough;

    an inflatable dilatation balloon positioned external to the distal portion of the catheter shaft and in fluid communication with an inflation lumen;

    an occlusion balloon positioned external to the distal portion of the catheter shaft and proximal to the dilatation balloon and in fluid communication with an inflation lumen; and

    a perfusion lumen at the distal portion of the catheter shaft, the perfusion lumen communicating between proximal and distal openings defined by said catheter shaft, the proximal opening located proximal to the occlusion balloon, and the distal opening located distal to the dilatation balloon;

    a guiding catheter having proximal and distal ends and defining a guiding catheter lumen, said occlusion balloon and a portion of the dilatation catheter shaft being within said guiding catheter lumen, and said dilatation balloon being distal from the guiding catheter distal end, wherein said occlusion balloon occludes said guiding catheter lumen in an inflated state, and said proximal opening communicates with said guiding catheter lumen; and

    a pump coupled with the guiding catheter proximal end, for pumping said perfusion fluid through said guiding catheter lumen from the guiding catheter proximal end toward the guiding catheter distal end, thereby causing the perfusion fluid to flow into and through said perfusion lumen.

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