Thin-wall intraluminal graft
 An intraluminal vascular graft in the form of a tube of porous expanded polytetrafluoroethylene film wherein the porous polytetrafluoroethylene film has a microstructure containing a multiplicity of fibrils oriented substantially parallel to each other. The tube has a wall thickness of less than about 0.25 mm and is made from at least one first layer and at least one second layer of porous polytetrafluoroethylene film, wherein the fibrils of the first and second layers are oriented substantially perpendicular to each other. Preferably the fibrils of the at least one first layer are oriented substantially parallel to the longitudinal axis of the tube and the fibrils of the at least one second layer of porous polytetrafluoroethylene film are oriented substantially circumferential to the tube. The first and second layers may be inner and outer layers respectively, or alternatively their relationship may be reversed. Alternatively, either of the first and second film layers may be replaced with alternative reinforcing components such as a braid or at least one reinforcing rib. 
W. L. Gore & Associates, Inc.
B Y A Y A Y Y B F A Y B B Y B Y A B B Y A A Y A B Y A Y Y B B A
B29C Y10T A61F Y10T A61L Y10T Y10T B29C F16L A61F Y10T B29K B29L Y10T B29C Y10T A61L B29K B29K Y10T A61F A61L Y10T A61L B29C Y10T A61B Y10T Y10T B29C B29L A61F
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Carey V. David J. James D.
Campbell Myers Lewis