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Drug delivery apparatus and method

  • US 5,282,785 A
  • Filed: 10/05/1992
  • Issued: 02/01/1994
  • Est. Priority Date: 06/15/1990
  • Status: Expired due to Term
First Claim
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1. A drug delivery apparatus having a distal end and a proximal end for radially restricted local delivery of a drug to internal body tissue comprising:

  • (a) a flexible catheter for insertion into an internal target area of a body;

    (b) drug delivery means connected to said catheter for radially restricted delivery of a drug to said internal body tissue, said drug delivery means comprising;

    (1) a fluid delivery passageway and a drug delivery chamber proximate said distal end of said drug delivery apparatus, said drug delivery chamber having an outer wall with a selectively permeable outer membrane portion; and

    (2) a non-permeable balloon affixed to and surrounding a portion of said drug delivery chamber, said balloon, when inflated, securing said drug delivery chamber at an internal body tissue target area and radially restricting local delivery of said drug by providing intimate contact between said balloon and a portion of said internal body tissue; and

    (c) means for assisting the transport of said drug across said selectively permeable outer membrane.

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