PTFE vascular prosthesis and method of manufacture
First Claim
Patent Images
1. A tubular intraluminal prosthesis comprising:
- a first PTFE tubular structure having a first porosity;
a second PTFE tubular structure having a second porosity less than said first porosity, said second PTFE tubular structure being disposed externally about said first PTFE tubular structure to define a distinct porosity change between said first and second PTFE tubular structure; and
a tubular diametrically deformable stent interposed between said first and second PTFE tubular structure.
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Abstract
An implantable microporous ePTFE tubular vascular graft exhibits long term patency, superior radial tensile strength and suture hole elongation resistance. The graft includes a first ePTFE tube and a second ePTFE tube circumferentially disposed over the first tube. The first ePTFE tube exhibits a porosity sufficient to promote cell endothelization tissue ingrowth and healing. The second ePTFE tube exhibits enhanced radial strength in excess of the radial tensile strength of the first tube. The stent provides patency to the endoprosthesis.
297 Citations
14 Claims
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1. A tubular intraluminal prosthesis comprising:
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a first PTFE tubular structure having a first porosity; a second PTFE tubular structure having a second porosity less than said first porosity, said second PTFE tubular structure being disposed externally about said first PTFE tubular structure to define a distinct porosity change between said first and second PTFE tubular structure; and a tubular diametrically deformable stent interposed between said first and second PTFE tubular structure. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of making a tubular intraluminal prosthesis comprising the steps of:
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providing a first tubular structure having a first porosity, consisting of an interior and exterior surface; placing a tubular diametrically deformable stent circumferentially around the exterior surface of said first tubular structure; disposing a second PTFE tubular structure externally about said tubular diametrically deformable stent, said second PTFE tubular structure having a second porosity less than said first porosity, and defining a distinct porosity change between said first and second PTFE tubular structures. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification