PTFE vascular graft and method of manufacture
First Claim
Patent Images
1. A multi-layered ePTFE graft comprising:
- a first ePTFE tubular structure having a first porosity;
a second ePTFE tubular structure having a different porosity than said first porosity, said second ePTFE tubular structure being disposed externally about said first ePTFE tubular structure; and
a self-sealing material interposed between said first and second ePTFE tubular structures, wherein said self-sealing material is selected from the group consisting of sheet, film, yarn, thread, mono-filament wrap, multi-filament wrap, tube, solvent-spun elastomeric fibers, helically-wound tape, and combinations thereof.
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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.
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Citations
25 Claims
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1. A multi-layered ePTFE graft comprising:
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a first ePTFE tubular structure having a first porosity;
a second ePTFE tubular structure having a different porosity than said first porosity, said second ePTFE tubular structure being disposed externally about said first ePTFE tubular structure; and
a self-sealing material interposed between said first and second ePTFE tubular structures, wherein said self-sealing material is selected from the group consisting of sheet, film, yarn, thread, mono-filament wrap, multi-filament wrap, tube, solvent-spun elastomeric fibers, helically-wound tape, and combinations thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A multi-layered ePTFE graft comprising:
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a first ePTFE tubular structure having a first porosity;
a second ePTFE tubular structure having a different porosity than said first porosity, said second ePTFE tubular structure being disposed externally about said first ePTFE tubular structure; and
a self-sealing material interposed between said first and second ePTFE tubular structures, wherein said self-sealing material comprises multiple layers having resealable properties.
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16. A multi-layered ePTFE graft comprising:
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a first ePTFE tubular structure having a first porosity;
a second ePTFE tubular structure having a different porosity than said first porosity, said second ePTFE tubular structure being disposed externally about said first ePTFE tubular structure; and
a self-sealing material interposed between said first and second ePTFE tubular structures, wherein said self-sealing material is augmented with a pre-sintered fluoropolymer bead wrap.
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17. A multi-layered ePTFE graft comprising:
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a first ePTFE tubular structure having a first porosity;
a second ePTFE tubular structure having a different porosity than said first porosity, said second ePTFE tubular structure being disposed externally about said first ePTFE tubular structure; and
a self-sealing material interposed between said first and second ePTFE tubular structures, wherein said self-sealing material is augmented with a wire support coil.
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18. A multi-layered ePTFE graft comprising:
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a first ePTFE tubular structure having a first porosity;
a second ePTFE tubular structure having a different porosity than said first porosity, said second ePTFE tubular structure being disposed externally about said first ePTFE tubular structure; and
a self-sealing material interposed between said first and second ePTFE tubular structures, wherein said self-sealing material is a self-sustained tubular structure. - View Dependent Claims (19)
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20. A multi-layered ePTFE vascular graft useful for repeated hemoaccess comprising:
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a first ePTFE tubular structure having a first porosity;
a second ePTFE tubular structure having a different porosity than said first porosity, said second ePTFE tubular structure being disposed externally about said first ePTFE tubular structure; and
a self-sealing material interposed between said first and second ePTFE tubular structures, wherein said self-sealing material is selected from the group consisting of sheet, film, yarn, thread, mono-filament wrap, multi-filament wrap, tube, solvent-spun elastomeric fibers, helically-wound tape, and combinations thereof. - View Dependent Claims (21)
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22. A multi-layered ePTFE vascular graft useful for repeated hemoaccess comprising:
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a first ePTFE tubular structure having a first porosity;
a second ePTFE tubular structure having a different porosity than said first porosity, said second ePTFE tubular structure being disposed externally about said first ePTFE tubular structure; and
a self-sealing material interposed between said first and second ePTFE tubular structures, wherein said self-sealing material is selected from the group consisting of thermoplastic elastomers, silicones, silicone rubbers, synthetic rubbers, polyurethanes, polyethers, polyesters, polyamides, fluoropolymers and combinations thereof.
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23. A multi-layered ePTFE vascular graft useful for repeated hemoaccess comprising:
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a first ePTFE tubular structure having a first porosity;
a second ePTFE tubular structure having a different porosity than said first porosity, said second ePTFE tubular structure being disposed externally about said first ePTFE tubular structure; and
a self-sealing material interposed between said first and second ePTFE tubular structures, wherein said self-sealing material is a self-sustained tubular structure. - View Dependent Claims (24)
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25. A multi-layered ePTFE vascular graft useful for repeated hemoaccess comprising:
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a first ePTFE tubular structure having a first porosity;
a second ePTFE tubular structure having a different porosity than said first porosity, said second ePTFE tubular structure being disposed externally about said first ePTFE tubular structure; and
a self-sealing material interposed between said first and second ePTFE tubular structures, wherein said self-sealing material comprises multiple layers having resealable properties.
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Specification