Stent graft with braided polymeric sleeve
First Claim
1. A body insertable stent graft, including:
- a radially expandable stent adjustable between a nominal state and a radially-reduced axially-elongated state according to a first relationship of radial reduction versus axial elongation; and
a tubular first sleeve formed of a plurality of interwoven textile strands, adjustable between a nominal state and a radially-reduced and axially-elongated state according to a second relationship of radial reduction versus axial elongation substantially equivalent to said first relationship;
wherein the stent and the sleeve are attached together in an axial alignment with one another and in an engagement with one another with a selected one of the stent and sleeve surrounding the other.
4 Assignments
0 Petitions
Accused Products
Abstract
A stent graft for transluminal implantation includes a resilient tubular interbraided latticework of metal or polymeric monofilaments, a tubular interbraided sleeve of polymeric multifilament yarns, and an adhesive layer between the sleeve and latticework for bonding them together. The monofilaments and multifilament yarns are arranged in respective sets of axially spaced apart and oppositely directed helices, concentric on a common axis of the stent graft. The respective braid angles of the monofilaments and multifilament yarns are carefully matched to ensure that the latticework and sleeve behave according to substantially the same relationship governing the amount of radial reduction that accompanies a given axial elongation. According to a process for fabricating the stent graft, the latticework and sleeve are braided and thermally set independently, then bonded to one another by a silicone polymer adhesive applied evenly to the latticework in a liquid spray that also incorporates an organic solvent. Especially preferred yarns are composed of essentially untwisted filaments that define non-circular yarn cross sections. Alternative stent graft constructions feature exterior and interior sleeves on opposite sides of the latticework, two or more sleeves axially spaced from one another on the same latticework, a latticework formed of a recovery metal, and a plastically deformable latticework.
436 Citations
28 Claims
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1. A body insertable stent graft, including:
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a radially expandable stent adjustable between a nominal state and a radially-reduced axially-elongated state according to a first relationship of radial reduction versus axial elongation; and a tubular first sleeve formed of a plurality of interwoven textile strands, adjustable between a nominal state and a radially-reduced and axially-elongated state according to a second relationship of radial reduction versus axial elongation substantially equivalent to said first relationship; wherein the stent and the sleeve are attached together in an axial alignment with one another and in an engagement with one another with a selected one of the stent and sleeve surrounding the other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A body insertable stent graft, including:
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a tubular stent adjustable between a nominal state and a radially-reduced and axially-elongated state; and a tubular fabric sleeve adjustable between a nominal state and a radially-reduced and axially-elongated state, formed of a plurality of textile strands, wherein each of the textile strands consists essentially of a multifilament yarn in which the filaments have surface twist angles of at most about 15 degrees, said sleeve and said stent having substantially the same radii when in their respective nominal states; wherein the stent and the sleeve are attached together in axial alignment with one another and with a selected one of the stent and sleeve surrounding the other. - View Dependent Claims (21, 22, 23)
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24. A body insertable stent graft, including:
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a stent adjustable between a nominal state and radially-reduced and axially-elongated state; and a tubular fabric sleeve formed of a plurality of textile strands, each textile strand consisting essentially of a multifilament yarn in which multiple filaments thereof are arranged to define a yarn cross-section having an aspect ratio of at least about 2, said fabric sleeve adjustable between a nominal state and a radially-reduced and axially-elongated state, said sleeve and said stent having substantially the same radii when in their respective nominal states; wherein the stent and the sleeve are attached together in an axial alignment and with a selected one of the stent and sleeve surrounding the other, with the stent structurally supporting the sleeve. - View Dependent Claims (25)
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26. A process for making a stent graft, including:
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forming a plurality of structural strands into a tubular open latticework adjustable between a nominal state and a radially-reduced axially-elongated state according to a first relationship of radial reduction versus axial elongation, the tubular open latticework having at least two ends; forming a plurality of compliant textile strands into a tubular sleeve adjustable between a nominal state and a radially-reduced axially-elongated state according to a second relationship of radial reduction versus axial elongation substantially equivalent to said first relationship; and attaching a selected one of the latticework and sleeve within and in an axial alignment with the other of said latticework and sleeve so that said other surrounds the selected one except one end of the tubular open latticework is unsurrounded by the sleeve.
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27. A body insertable stent graft, including:
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a radially expandable stent adjustable between a nominal state and a radially-reduced axially-elongated state according to a first relationship of radial reduction versus axial elongation the stent having at least two ends; and a tubular first sleeve formed of a plurality of interwoven textile strands, adjustable between a nominal state and a radially-reduced and axially-elongated state according to a second relationship of radial reduction versus axial elongation substantially equivalent to said first relationship; wherein the stent and the sleeve are attached together in an axial alignment with one another and in an engagement with one another with a selected one of the stent and sleeve surrounding the other except one end of the stent is unsurrounded by the sleeve.
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28. A body insertable stent graft, including:
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a tubular stent adjustable between a nominal state and a radially-reduced and axially-elongated state, the tubular stent having at least two ends; and a tubular fabric sleeve adjustable between a nominal state and a radially-reduced and axially-elongated state, formed of a plurality of textile strands, wherein each of the textile strands consists essentially of a multifilament yarn in which the filaments have surface twist angles of at most about 15 degrees, said sleeve and said stent having substantially the same radii when in their respective nominal states; wherein the stent and the sleeve are attached together in axial alignment with one another and with a selected one of the stent and sleeve surrounding the other except at least one end being unsurrounded by the tubular fabric sleeve.
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Specification