Bifurcated stent graft
First Claim
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; and
a 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.
5 Assignments
0 Petitions
Accused Products
Abstract
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.
333 Citations
34 Claims
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1. An implantable prosthesis for branched internal passageways, including:
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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; and a 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A process for making a stent graft implantable in branched internal passageways, including:
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providing a tubular stent comprised of a plurality of structural strands adjustable between a nominal state and a radially-reduced axially-elongated state according to a first relationship of radial reduction vs. axial elongation; providing a compliant tubular sleeve comprised of a plurality of textile strands, having a nominal state in which the sleeve is substantially the same size and shape as the stent in its nominal state, and adjustable between the 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; forming, along an axially-extending selected region of the sleeve, a coupling of selected portions of the sleeve that are circumferentially spaced apart when the sleeve is in the tubular shape, to form at least two side-by-side fluid conduits along the selected region, thus forming the sleeve into a fluid flow guide having a primary fluid conduit along a proximal end region of the sleeve in fluid communication with the side-by-side fluid conduits; positioning a selected one of the stent and the sleeve within the other of the stent and sleeve, so that said other surrounds the selected one, and with the selected one so positioned, bringing the stent and sleeve into an engagement; and while maintaining the engagement, binding the stent and the sleeve together to form a composite stent graft. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A body insertable prosthesis, including:
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a compliant and substantially fluid impervious sleeve having tubular proximal and distal end regions defining respective proximal end and distal end fluid conduits; a tubular open-frame structural member surrounding the sleeve and fixed to the sleeve at least along said tubular end regions whereby the structural member and the sleeve are adjustable in concert between a nominal state and a reduced-radius state; and a flow dividing feature defining a plurality of medial fluid flow conduits along a medial region of the sleeve, wherein each of the medial conduits is open to the proximal end conduit and to the distal end conduit. - View Dependent Claims (29, 30, 31, 32, 33, 34)
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Specification