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Flexible inner liner for the working channel of an endoscope

  • US 5,938,587 A
  • Filed: 11/07/1996
  • Issued: 08/17/1999
  • Est. Priority Date: 04/25/1996
  • Status: Expired due to Term
First Claim
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1. A collapse-resistant and kink-resistant, flexible tubing construction comprising:

  • a tubular member having a proximal end and a distal end and at least one lumen extending therebetween, said tubular member having a tubular wall having a generally smooth interior surface surrounding said at least one lumen, said tubular member having a wall thickness,at least a first portion of said tubular member having a multiplicity of external ridges for allowing said first portion of said tubular member to flex without kinking or buckling of said tubular wall and without collapsing said at least one lumen, said multiplicity of external ridges being formed by varying said wall thickness.

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