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Method of insitu bypass to hold open venous valves

  • US 5,843,171 A
  • Filed: 01/24/1997
  • Issued: 12/01/1998
  • Est. Priority Date: 01/29/1996
  • Status: Expired due to Term
First Claim
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1. A method of performing an in situ bypass, comprising:

  • a. transecting a vein to form a vein segment;

    b. inserting a circumferentially distensible intraluminal graft into the vein segment and into at least one venous valve within the vein segment;

    c. circumferentially distending the intraluminal graft, thereby holding open the at least one venous valve; and

    d. anastomosing the vein segment to adjacent arteries;

    wherein the intraluminal graft comprises a porous PTFE tube having a microstructure of nodes interconnected by fibrils, said tube having a luminal surface, at least two first regions and two second regions wherein said second regions have a greater mean fibril length than said first regions when fibril lengths are measured at the luminal surface of the tube.

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