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Infusion catheter

  • US 5,840,066 A
  • Filed: 10/22/1996
  • Issued: 11/24/1998
  • Est. Priority Date: 10/26/1995
  • Status: Expired due to Term
First Claim
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1. An infusion catheter for supplying medicine upstream of a lesion formed in a blood vessel following expansion of a balloon, said infusion catheter comprising:

  • an elongate catheter shaft having a proximal end, a distal end, a first lumen for supplying and removing a fluid medium from a balloon, and a second lumen having a medicine discharge port for supplying medicine to the blood vessel, and both the first and second lumens being supported by the catheter shaft;

    a balloon being located adjacent to the distal end of said catheter shaft but spaced therefrom, said balloon communicating with said first lumen and being inflatable and contractible such that said balloon inflates when the fluid medium is supplied to said balloon and contracts when the fluid medium is removed from said balloon;

    a blood passage being provided in said catheter shaft for bypassing blood passed both said balloon and said medicine discharge port, said blood passage having a first opening located between the proximal end of said catheter shaft and said balloon and a second opening being located between said balloon and the distal end of said catheter shaft; and

    the medicine discharge port being located between said balloon and the second opening of said blood passage such that during use, the medicine is introduced into the blood vessel proximate the lesion but spaced from the second opening of said blood passage thereby facilitating the medication to medicate the lesion.

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