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Micro-catheters and methods of their manufacture

  • US 6,186,986 B1
  • Filed: 01/21/1998
  • Issued: 02/13/2001
  • Est. Priority Date: 01/21/1998
  • Status: Expired due to Term
First Claim
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1. A micro-catheter having a proximal end and a distal end, said micro-catheter comprising:

  • a tubular primary liner that substantially extends from said proximal end to said distal end, said primary liner having an inner surface and an outer surface; and

    a plurality of concatenated tubes having respective inner surfaces fused to said primary liner outer surface, such each and every pair of said tubes comprises a proximal tube having an outer diameter and a distal tube having an outer diameter that does not exceed said outer diameter of said proximal tube and wherein at least one of said each and every pairs comprises a respective proximal tube and a respective distal tube such that an outer diameter of said respective distal tube is less than an outer diameter of said respective proximal tube.

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