GB2247696A
Expired / Lapsed
GB
⏱️ 0.0 years remaining
Woven synthetic vascular graft
Assignee: Boston Scientific Scimed Inc
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Filing: 1991-08-28
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Granted: —
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Expires: 2011-08-28
Abstract
Abstract A ravel-resistant, self-supporting woven synthetic fabric tubular vascular graft includes a fusible fiber (25) in the filling yarn so that on heat-treatment the fusible fibres bond to the warp yarns to prevent unravelling. The graft is woven from multifilament polyester warp yarns which can be textured or flat and the fusible fibers in the filling yarn can be combined with a stiff monofilament (21) to provide radial rigidity to improve kink and crush resistance. The fusible fibres may be of bicomponent type with an outer melting sheath. Alternate warp yarns may form pile loops (17) on the outer surface of the graft. The graft may have a forked shape. <IMAGE>
Inventors
- 👤 Peter J Schmitt
Bibliographic Details
Application Number
—
Jurisdiction
GB
Data Source
google_patents
Last Synchronized
2026-10-23 04:08
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/50; A61L27/507; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/06; A61L27/14; A61L27/18; A61L27/28; A61L27/34; D; D03; D03D; D03D15/00; D03D15/20; D03D15/283; D03D15/40; D03D15/41; D03D15/44; D03D15/46; D03D15/47; D03D15/49; D03D15/50; D03D15/573; D03D15/587; D03D27/00; D03D3/00; D03D3/02; A61F2002/065; C; C08; C08L; C08L67/00; C08L67/02; D10; D10B; D10B2321/00; D10B2321/02; D10B2321/021; D10B2321/04; D10B2321/042; D10B2331/00; D10B2331/04; D10B2331/10; D10B2401/00; D10B2401/04; D10B2401/041; D10B2401/06; D10B2401/062; D10B2509/00; D10B2509/06; Y; Y10; Y10S; Y10S623/00; Y10S623/92; Y10S623/921
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
28 words
A ravel-resistant woven synthetic vascular graft, comprising:
a plurality of warp ends woven with a filling yarn and including a low melting temperature fusible component in the weave.
Claim 2
Dependent Claim
28 words
A ravel-resistant woven synthetic vascular graft, comprising:
a plurality of warp ends woven with a filling yarn and including a low melting temperature fusible component in the weave.
Claim 3
Dependent Claim
19 words
The woven vascular graft of claim 1, wherein the low melting temperature fusible component is in the filling yarn.
Claim 4
Dependent Claim
18 words
The woven vascular graft of claim 1, wherein the low melting fusible component is in the warp yarns.
Claim 5
Dependent Claim
21 words
The woven vascular graft of claim 1, wherein the graft is a tube and the filling yarn includes a stiffening component.
Claim 6
Dependent Claim
30 words
The woven vascular graft of claim 1, wherein the low melting fusible component is a bicomponent fiber having a high melting temperature core and a low melting temperature polymer sheath.
Claim 7
Dependent Claim
28 words
The woven vascular graft of claim 5, wherein the core is polyester and the sheath is a compatible resin having a melting point between about 110 to 230'C.
Claim 8
Dependent Claim
31 words
The woven vascular graft of claim 2, wherein the low melting temperature fusible component in the filling direction is in the form of a yarn woven together with a stiffening component.
Claim 9
Dependent Claim
15 words
The woven vascular graft of claim 1, wherein the warp ends include multifilament textile yarns.
Claim 10
Dependent Claim
14 words
The woven vascular graft of claim 8, wherein the multifilament yarns are polyethylene terephthalate.
Claim 11
Dependent Claim
15 words
The woven vascular graft of claim 4, wherein the stiffening component is a monofilament yarn.
Claim 12
Dependent Claim
32 words
The woven vascular of claim 2, wherein the low melting temperature fusible component is a yarn formed of bicomponent fiber having a polyester core surrounded by a low melting temperature polymer sheath.
Claim 13
Dependent Claim
22 words
The woven vascular graft of claim 11, wherein the yarn of fusible fibers is wound together with monofilament yarn prior to weaving.
Claim 14
Dependent Claim
18 words
The woven vascular graft of claim 12, wherein the monofilament component of the filling yarn is polyethylene terephthalate.
Claim 15
Dependent Claim
20 words
The woven vascular graft of claim 10, wherein the monofilament yarn has a diameter from about 2 to 10 mils.
Claim 16
Dependent Claim
18 words
The woven vascular graft of claim 1, wherein the fusible component melts between about 110 to 230' C.
Claim 17
Dependent Claim
26 words
The woven vascular graft of claim 15, wherein the fusible component is selected from the group consisting of copolyester, polyethylene, activated copolyethylene, copolyolefin and polyurethane resins.
Claim 18
Dependent Claim
25 words
The woven vascular graft of claim 1, wherein the graft has at least one velour surface of a plurality of loops of multifilament warp ends.
Claim 19
Dependent Claim
19 words
The woven vascular graft of claim 17, wherein the warp ends forming the loops alternate between each warp end.
Claim 20
Dependent Claim
18 words
The woven vascular graft of claim 17, wherein the multifilament warp yarns of the loops are polyethylene terephthalate.
Claim 21
Dependent Claim
18 words
The woven vascular graft of claim 19, wherein the warp yarn forming the loop is texturized polyethylene terephthalate.
Claim 22
Dependent Claim
40 words
The woven vascular graft of claim 17, wherein the vascular graft is a tube with an outside surface having loops and a smooth interior surface, the loops on the outside surface formed from warp yarns of texturized multi filament yarn.
Claim 23
Dependent Claim
22 words
The woven vascular graft of claim 1, wherein the graft has been heat set to bond the fusible components to adjacent yarns.
Claim 24
Dependent Claim
64 words
A self-supporting single velour woven synthetic vascular graft, comprising:
a plurality of multi filament warp ends forming a lattice structure;
a plurality of warp of multifilament warp ends forming loops on the exterior surface of the graft for providing an outer velour surface and a smooth inner surface; and
a filling yarn including low melting temperature fusible component combined with a stiffening monofilament yarn.
Claim 25
Dependent Claim
64 words
A self-supporting single velour woven synthetic vascular graft, comprising:
a plurality of multi filament warp ends forming a lattice structure;
a plurality of warp of multifilament warp ends forming loops on the exterior surface of the graft for providing an outer velour surface and a smooth inner surface; and
a filling yarn including low melting temperature fusible component combined with a stiffening monofilament yarn.
Claim 26
Dependent Claim
25 words
The woven vascular graft of claim 23, wherein the filling yarn includes a yarn of low melting fusible fibers wound together with a monofilament yarn.
Claim 27
Dependent Claim
37 words
The woven vascular graft of claim 23, wherein the filling yarn is a yarn of bicomponent fibers having a polyester core surrounded by a low melting temperature polymer sheath wound together with a monofilament polyethylene terephthalate yarn.
Claim 28
Dependent Claim
18 words
The woven vascular graft of claim 23, wherein the warp pile ends alternate with the warp ground ends.
Claim 29
Dependent Claim
38 words
The woven vascular graft of claim 26, wherein the vascular graft is a tube with an outside velour surface and a smooth interior surface, the velour surface formed from warp yarn of texturized multi filament polyethylene terephthalate yarn.
Claim 30
Dependent Claim
22 words
The woven vascular graft of claim 23, when the graft has been heat set to bond the fusible component to adjacent yarns.
Claim 31
Independent Claim
50 words
A method of preparing a ravel-resistant selfsupporting woven vascular graft, comprising:
weaving a plurality of warp ends, including multifilament yarns with a filling yarn including a yarn of low melting fusible fibers; and
heat setting the fabric to bond the fusible fibers of the filling yarns to orthogonal warp yarns.
Claim 32
Independent Claim
50 words
A method of preparing a ravel-resistant selfsupporting woven vascular graft, comprising:
weaving a plurality of warp ends, including multifilament yarns with a filling yarn including a yarn of low melting fusible fibers; and
heat setting the fabric to bond the fusible fibers of the filling yarns to orthogonal warp yarns.
Claim 33
Dependent Claim
12 words
The method of claim 29, including weaving the graft into a tube.
Claim 34
Dependent Claim
29 words
The method of claim 29, including weaving the graft into a tube and heat setting by placing the tube on a mandrel and heating to bond the fusible fibers.
Claim 35
Dependent Claim
57 words
The method of claim 31, wherein heat setting includes placing the - graft onto a mandrel in a stretched condition and heating to bond the fusible fibers and compressing the graft longitudinally on the same mandrel without crimping the fabric and heating to set the yarns in a crimped condition to impart longitudinal stretch to the graft.
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