Self-sealing PTFE graft with kink resistance
First Claim
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1. A method of forming a vascular graft, comprising:
- providing a tubular ePTFE substrate;
applying a sealant layer over the tubular ePTFE substrate;
compressing the tubular ePTFE substrate with sealant layer;
applying a foam layer over the sealant layer to form a preliminary graft assembly;
heating the preliminary graft assembly;
longitudinally compressing the preliminary graft assembly to form a longitudinally compressed graft assembly; and
wrapping a beading over the longitudinally compressed graft assembly.
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Abstract
A self-sealing vascular graft, including a substrate with a sealant layer and several optional additional layers, is described. The substrate can be ePTFE and the material used for the sealant and additional layers can be polyurethane. The sealant layer and additional layers may include one or more base layers, one or more foam layers, beading of different sizes and shapes, and ePTFE tape. A flared cuff may be integral to one or both ends of the substrate or may be attached to one or both ends. Various methods of making a self-sealing vascular graft are also described, including methods of disposition, methods of forming, methods of bonding and methods of attaching.
275 Citations
17 Claims
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1. A method of forming a vascular graft, comprising:
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providing a tubular ePTFE substrate; applying a sealant layer over the tubular ePTFE substrate; compressing the tubular ePTFE substrate with sealant layer; applying a foam layer over the sealant layer to form a preliminary graft assembly; heating the preliminary graft assembly; longitudinally compressing the preliminary graft assembly to form a longitudinally compressed graft assembly; and wrapping a beading over the longitudinally compressed graft assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification