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.
172 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
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Current AssigneeLifeport Sciences LLC (Acacia Research Corporation)
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Original AssigneeScimed Life Systems Incorporated (Boston Scientific Corporation)
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InventorsRakos, Ronald, Lentz, David, Zdrahala, Richard, Dormier, Edward, Loomis, Gary, Henderson, Jamie, Sowinski, Krzysztof
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Primary Examiner(s)Willse, David H.
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Assistant Examiner(s)GHERBI, SUZETTE JAIME J
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Application NumberUS10/212,609Publication NumberTime in Patent Office617 DaysField of Search623/1.15, 623/1.27, 623/1.39, 623/1.4, 623/1.49US Class Current623/1.4CPC Class CodesA61F 2/06 Blood vesselsA61L 27/16 obtained by reactions only ...A61L 27/507 for artificial blood vessel...A61L 27/56 Porous materials, e.g. foam...C08L 27/18 Homopolymers or copolymers ...
