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Catheter with medicament injection pores

  • US 5,547,472 A
  • Filed: 01/19/1995
  • Issued: 08/20/1996
  • Est. Priority Date: 01/20/1994
  • Status: Expired due to Term
First Claim
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1. A catheter including a tube having a tube wall, said tube comprising a first polymer and having a plurality of pores extending through said tube wall, said pores having associated therewith a second polymer which is different from the first polymer and which undergoes a structural change upon contact with a fluid introduced into the tube that has a physical or a chemical property that induces said structural change of said second polymer to thereby enable a selective transmission of the fluid through said tube wall.

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