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Differentially expanded vascular graft

  • US 7,857,843 B2
  • Filed: 12/31/2004
  • Issued: 12/28/2010
  • Est. Priority Date: 12/31/2004
  • Status: Expired due to Fees
First Claim
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1. A differentially expanded vascular graft for implantation within a body, said vascular graft comprising:

  • a PTFE tube formed of a homogenous material,said PTFE tube having a plurality of surfaces including a luminal surface and an abluminal surface and a wall extending therebetween,at least one of said plurality of surfaces having a longitudinal first portion which has been longitudinally expanded and a longitudinal second portion which has been longitudinally expanded,said first and second portions have respective microstructures which are different from one another, said first and second portions having respective longitudinal positions relative to said PTFE tube wherein said respective longitudinal positions are different from one another, said first portion being unsintered and said second portion being sintered to lock the microstructure thereof.

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