초록 ▼

A bifurcated stent graft implantable in branched internal passageways includes an open-frame stent latticework formed of helically wound structural strands, and a graft sleeve formed of interwoven textile strands. The sleeve is substantially impervious to fluids and is adjustable along with the graf

A bifurcated stent graft implantable in branched internal passageways includes an open-frame stent latticework formed of helically wound structural strands, and a graft sleeve formed of interwoven textile strands. The sleeve is substantially impervious to fluids and is adjustable along with the graft between a nominal state and radially-reduced axially-elongated state, according to substantially the same relationship of radial reduction versus axial elongation. The sleeve and stent are bonded to one another at least at proximal and distal end regions of the stent graft. The sleeve preferably is surrounded by the stent, and incorporates a flow dividing feature in the form of an axially extending seam. The seam brings together portions of the sleeve that otherwise would be circumferentially spaced apart in the tubular sleeve shape. The stent latticework and graft sleeve can be coextensive, the sleeve can extend distally beyond the latticework, or the latticework can extend proximally beyond the sleeve, depending on the intended use. In other alternative embodiments, the sleeve can surround the latticework.

대표청구항 ▼

[ What is claimed is:] [1.] An implantable prosthesis for branched internal passageways, including:an open-frame structural member adjustable between a nominal state and a radially-reduced axially-elongated state according to a first relationship of radial reduction vs. axial elongation;a fluid flow

[ What is claimed is:] [1.] An implantable prosthesis for branched internal passageways, including:an open-frame structural member adjustable between a nominal state and a radially-reduced axially-elongated state according to a first relationship of radial reduction vs. axial elongation;a fluid flow guide formed of textile strands, substantially impervious to fluids and adjustable between a nominal state and a radially-reduced axially-elongated state according to a second relationship of radial reduction vs. axial elongation substantially equivalent to said first relationship, said fluid flow guide including an axially-extending first region along which the fluid flow guide is tubular to provide a primary conduit;wherein the structural member and the fluid flow guide are joined to one another to undergo radial enlargements and contractions in concert, with a selected one of the structural member and fluid flow guide surrounding the other; anda flow dividing feature along a second axially-extending region of the fluid flow guide, to provide along the second region at least two secondary conduits, each secondary conduit open to the primary conduit.