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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

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.

대표청구항 ▼

[ What is claimed is:] [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; anda tubular first sleeve formed of a plur

[ What is claimed is:] [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; anda 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.