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Endoscopic working channel and method of making same

  • US 20080139887A1
  • Filed: 12/07/2006
  • Published: 06/12/2008
  • Est. Priority Date: 12/07/2006
  • Status: Abandoned Application
First Claim
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1. An endoscopic working channel capable of retrofit into a pre-existing endoscope including in combination:

  • an inner sintered polytetrafluoroethylene tubular member having an internal diameter and an external diameter, and having first and second opposing ends;

    a spiral wrap of metal wire over the external diameter of the inner tubular member;

    an outer tubular member over the spiral wire wrap and the inner tubular member and made of sintered expanded polytetrafluoroethylene with first and second opposing ends, and having an internal diameter selected to cause an intimate contact with the spiral wire wrap and the inner tubular member, with the outer expanded polytetrafluoroethylene tubular member bonded to the inner polytetrafluoroethylene tubular member between adjacent turns of the spiral wire wrap.

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