Multi-stage prosthesis
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United States of America Patent
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Sep 11, 2001
Issued Date -
N/A
app pub date -
Feb 8, 1999
filing date -
Dec 3, 1996
priority date (Note) -
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status (Latency Note)
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Abstract
A porous tube suitable for use as a vascular graft prosthesis and a method of making it is disclosed. It has a structure of porous polytetrafluoroethylene having a fibrous structure of nodes and fibers connecting the nodes together and an integrated intrawall circumferential support adjacent to areas of variable porosity. This invention provides a polytetrafluoroethylene polymer in a porous form useful as artificial internal organs for, for example vascular bypass, vascular access, and endovascular prosthesis. PTFE walls are found with radial zones of differing porosity are described.
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