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Intravascular drug delivery dilatation catheter

  • US 4,994,033 A
  • Filed: 05/25/1989
  • Issued: 02/19/1991
  • Est. Priority Date: 05/25/1989
  • Status: Expired due to Term
First Claim
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1. An intravascular material delivery dilatation catheter comprising:

  • first, second and third elongated, flexible, hollow, plastic tubular members of descending diameter concentrically disposed relative to one another and each having a proximal end, a distal end and defining a lumen extending between the proximal end and the distal end, the distal end of the third tubular member extending beyond the distal ends of the first and second tubular members;

    inner hollow expansible sleeve means bonded at one end to the third tubular member near the distal end thereof and at the other end to the distal end of the second tubular member, the interior of the inner hollow expansible sleeve means further being in fluid communication with the portion of the lumen defined by the second tubular member outside the third tubular member;

    outer hollow expansible membrane sleeve means bonded at one end near the distal end of the third tubular member and at the other end to the distal end of the first tubular member, the interior of the outer hollow sleeve means further being in fluid communication with the portion of the lumen of the first tubular member defined between the first and second tubular members, the outer hollow sleeve means including a pattern of minute openings extending radially therethrough; and

    manifold means connected to the proximal ends of the first and second tubular members for introducing an inflation fluid into the lumen of the second tubular member outside the third tubular member and a liquid dispersant into the lumen of the first tubular member outside the second tubular member whereby an amount of dispersant can be caused to perfuse through the minute openings in the outer sleeve means as the inner hollow sleeve means is expanded by the inflation fluid.

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