Patent US2801351A successfully refreshed from Google Patents.
Patent EP0804909A2 successfully refreshed from Google Patents.
EP0804909A2
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EP
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Three dimensional braided covered stent
Assignee: Schneider USA Inc
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Filing: 1997-04-30
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Granted: —
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Expires: 2017-04-30
Abstract
Abstract A prothesis (18, 108, 120) for transluminal implantation consists of a flexible tubular three-dimensionally braided structure of metal or polymeric monofilaments (32, 110, 126), and polymeric multifilament yarns (42). The prosthesis can be elastically deformed to reduce its diameter through axial elongation. The monofilaments and multifilament yarns are arranged in axially spaced apart helices, concentric on a common central axis of the prosthesis. The monofilaments are selectively shaped before their interbraiding with the multifilament yarns, either by an age-hardening or other heat-setting stage, or a cold-working stage that controllably plastically deforms the strands. The shaped structural strands cooperate to impart to the prosthesis its nominal shape and resilience. The textile strands cooperate to provide one or more layers of sheeting (40) that reduce permeability and thereby enhance the utility of the prosthesis as a vascular graft. An alternative embodiment prosthesis (132) includes elastically and plastically deformable structural strands (140), selectively plastically deformed by cold working, then three-dimensionally braided to form the prosthesis.
Inventors
- 👤 Paul J. Thompson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 12:02
CPC Classifications
D; D04; D04C; D04C1/00; D04C1/06; A; A61; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/06; A61F2/82; A61F2/86; A61F2/90; D04C3/00; D04C3/02; D04C3/36; D04C3/40; A61F2/0077; A61F2/07; A61F2/95; A61F2002/072; A61F2210/00; A61F2210/0004; A61F2210/0076; A61F2220/00; A61F2220/0008; A61F2220/0016; A61F2240/00; A61F2240/001; A61F2250/00; A61F2250/0058; A61F2250/0067; A61F2250/0096; A61F2250/0098; D10; D10B; D10B2401/00; D10B2401/06; D10B2401/061; D10B2509/00; D10B2509/06
Claims Analysis
Total Claims: 46
Claim 1
Independent Claim
80 words
A process for making a prosthesis, including: providing a plurality of structural strands (32, 110, 126) formed of structural material and having an original nominal shape and providing a plurality of compliant textile strands (42); altering the structural strands to impart to each of the structural strands a selected nominal shape in lieu of the original nominal shape; and after said altering, braiding the strands into a three-dimensional integrated structure (18, 108,120) including the structural strands and the textile strands.
Claim 2
Dependent Claim
85 words
A process for making a prosthesis, comprising: providing a plurality of structural strands (32, 110, 126) formed of structural material of a desired strength and resilience, and imparting to each structural strand a selected nominal shape, corresponding to its nominal shape in the finished prosthesis; providing a plurality of compliant textile strands (42) for adapting to the shape of the structural strands; and three-dimensionally braiding the structural strands in the selected nominal shape with the textile strands to form a tubular structure (18, 108, 120).
Claim 3
Dependent Claim
43 words
The process of claim 1 or 2, wherein: said braiding includes forming the structural strands into a latticework (35), and forming the textile strands into a textile sheeting (40) supported by the latticework and occupying interstices between adjacent structural strands of the latticework.
Claim 4
Dependent Claim
43 words
The process of claim 3 further including: after said braiding, plastically deforming the latticework to reduce a diameter of the integrated structure while maintaining the structural strands below an activation temperature of the structural material, wherein said structural material is a recovery metal.
Claim 5
Dependent Claim
29 words
The process of any preceding claim, wherein: said braiding includes braiding the strands into at least first and second discrete layers (112,114,116, 122, 124, 128) of the integrated structure.
Claim 6
Dependent Claim
32 words
The process of claim 5 wherein: said braiding further includes braiding at least one of the strands of the first layer into the second layer to interlock the first and second layers.
Claim 7
Dependent Claim
35 words
The process of claim 5 wherein: said braiding includes incorporating a higher proportion of finer strands into the first layer, whereby the first layer has a permeability greater than a permeability of the second layer.
Claim 8
Dependent Claim
21 words
The process of claim 5 wherein: said braiding includes incorporating a greater proportion of said structural strands into said first layer.
Claim 9
Dependent Claim
23 words
The process of claim 5 wherein: said braiding includes interbraiding a plurality of absorbable strands with the structural strands and the textile strands.
Claim 10
Dependent Claim
19 words
The process of claim 9 wherein: said braiding further includes incorporating the absorbable strands primarily into said second layer.
Claim 11
Dependent Claim
25 words
The process of claim 5 wherein: said braiding includes interbraiding a plurality of drug eluting strands (130) with the structural strands and the textile strands.
Claim 12
Dependent Claim
20 words
The process of claim 11 wherein: said braiding further includes incorporating the drug eluting strands primarily into said first layer.
Claim 13
Dependent Claim
54 words
The process of any preceding claim, wherein: said structural material is thermally formable, and said shaping includes winding the structural strands, preferably around a selectively sized and shaped mandrel (78, 96), then heating the strands while so wound to a heat forming temperature to thermally impart to each structural strand its selected nominal shape.
Claim 14
Dependent Claim
34 words
The process of any preceding claim, wherein: said braiding includes selectively orienting the structural strands to impart a predetermined configuration to the integrated structure based on the selected nominal shapes of the structural strands.
Claim 15
Dependent Claim
34 words
The process of any preceding claim wherein: the structural material is a metal, and said altering includes selectively plastically deforming the structural strands, preferably while the strands are being moved to a braiding station.
Claim 16
Dependent Claim
32 words
The process of claim 15 wherein: said plastic deformation includes cold working, preferably by wrapping each of the strands about a rotatable pulley (102) and maintaining the strand at a selected tension.
Claim 17
Dependent Claim
19 words
The process of any preceding claim, wherein: said shaping includes forming each of the structural strands into a helix.
Claim 18
Dependent Claim
33 words
The process of claim 17 wherein: said braiding includes providing the structural strands as first and second sets of helices running in opposite directions, whereby the interstices of the resulting latticework are rhombic.
Claim 19
Dependent Claim
21 words
The process of claim 17 wherein: said braiding includes winding the helices in a single direction, whereby the interstices are helical.
Claim 20
Dependent Claim
50 words
The process of any preceding claim wherein: said braiding includes braiding the strands into at least three discreet layers of the integrated structure including a medial layer including the structural strands, and first and second layers on opposite sides of the medial layer and consisting primarily of the textile strands.
Claim 21
Dependent Claim
10 words
A prosthesis formed by the process of any preceding claim.
Claim 22
Dependent Claim
43 words
A prosthesis comprising an integrated three dimensional structure including a braid comprising a plurality of structural strands and a plurality of compliant textile strands, wherein said structural strands have a selected nominal shape, the shape having been imparted prior to the braiding operation.
Claim 23
Dependent Claim
113 words
A prosthesis, including: a three-dimensionally braided structure (18, 108, 120) including a plurality of structural strands (32, 110, 126) and a plurality of compliant textile strands (42) interbraided with the structural strands; wherein the structural strands are formed of a material having a tendency to assume a nominal shape when in a relaxed state, and have respective selected nominal strand shapes imparted by at least one of: (i) a selective plastic deformation from an original nominal shape to the selected nominal shape; and (ii) a selective thermal setting including heating to a temperature greater than a melting temperature of the textile strands while the structural strand is maintained in the selected nominal shape.
Claim 24
Dependent Claim
63 words
The prosthesis of claim 21, 22 or 23 wherein: the structural strands have selective orientations within the braided structure to impart a predetermined configuration to the braided structure; and the structural strands cooperate to form a latticework (35), and the textile strands cooperate to form a textile sheeting (40) supported by the latticework and occupying interstices between adjacent structural strands of the latticework.
Claim 25
Dependent Claim
36 words
The prosthesis of claim 21, 22 or 23 wherein: the structural strands and textile strands are three-dimensionally braided into at least first and second discrete layers (112, 114, 116, 122, 124, 128) of the composite structure.
Claim 26
Dependent Claim
29 words
The prosthesis of claim 25 wherein: at least one of the strands of the first layer is braided into the second layer to interlock the first and second layers.
Claim 27
Dependent Claim
21 words
The prosthesis of claim 25 wherein: said first layer incorporates finer strands and has a greater permeability than the second layer.
Claim 28
Dependent Claim
18 words
The prosthesis of claim 25 wherein: said structural strands form a latticework incorporated primarily into the first layer.
Claim 29
Dependent Claim
19 words
The prosthesis of claim 25 further including: a plurality of drug eluting strands (130) braided into the first layer.
Claim 30
Dependent Claim
21 words
The prosthesis of claim 25 further including: a plurality of absorbable strands interbraided with the structural strands and the textile strands.
Claim 31
Dependent Claim
16 words
The prosthesis of claim 30 wherein: the absorbable strands are braided primarily into the second layer.
Claim 32
Dependent Claim
36 words
The prosthesis of any of claims 21 to 31 wherein: said structural strands are metal and formed of at least one of the following materials: stainless steel, an alloy including cobalt, and an alloy including titanium.
Claim 33
Dependent Claim
33 words
The prosthesis of claim 28 wherein: said structural strands are polymeric, and constructed of at least one of the following materials: PET, polypropylene, PEEK, HDPE, polysulfone, acetyl, PTFE, FEP, polycarbonate urethane, and polyurethane.
Claim 34
Dependent Claim
22 words
The prosthesis of claim 31 wherein: said textile strands are multifilament yarns in the range of about 10-400 denier (9-360 d tex).
Claim 35
Dependent Claim
28 words
The prosthesis of claim 34 wherein: said multifilament yarns are composed of filaments, each filament being in the range of about 0.25-10 denier (0.23 - 9 d tex).
Claim 36
Dependent Claim
31 words
The prosthesis of claim 34 wherein: said multifilament yarns are formed of at least one of the following materials: PET, polypropylene, polyurethane, polycarbonate urethane, HDPE, polyethylene, silicone, PTFE, ePTFE, and polyolefin.
Claim 37
Dependent Claim
20 words
The prosthesis of any of claims 21 to 36 wherein: said predetermined nominal shapes of the structural strands are helical.
Claim 38
Dependent Claim
37 words
The prosthesis of claim 37 wherein: said structural strands cooperate to form a latticework including first and second sets of helices running in respective first and second opposite directions, whereby the interstices of the latticework are rhombic.
Claim 39
Dependent Claim
15 words
The prosthesis of claim 36 wherein: the first and second sets of helices are interbraided.
Claim 40
Dependent Claim
17 words
The prosthesis of claim 38 wherein: the first set of helices overlies the second set of helices.
Claim 41
Dependent Claim
24 words
The prosthesis of claim 38 wherein: the first and second sets of helices define a braid angle in the range of about 60-150 degrees.
Claim 42
Dependent Claim
24 words
The prosthesis of any of claims 21 to 41 further including: at least one radiopaque strand interbraided with the structural strands and textile strands.
Claim 43
Dependent Claim
18 words
The prosthesis of claim 42 wherein: said at least one radiopaque strand is incorporated within the first layer.
Claim 44
Dependent Claim
20 words
The prosthesis of claim 37 wherein: said structural strands are wound in a single direction, whereby the interstices are helical.
Claim 45
Dependent Claim
20 words
The prosthesis of claim 32 wherein; said structural strands are formed of an alloy of cobalt, chromium and molybdenum (CoCrMo).
Claim 46
Dependent Claim
24 words
A medical device including an elongate and flexible catheter, and, mounted thereon. a three dimensionally braided prosthesis according to any claims 21 to 45.
References Cited (Backward Citations)
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