Patent EP0783873A2 successfully refreshed from Google Patents.
EP0783873A2
Expired / Lapsed
EP
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Bifurcated stent assembly
Assignee: Boston Scientific Corp
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Filing: 1995-02-06
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Granted: —
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Expires: 2015-02-06
Abstract
Abstract The invention provides a bifurcated stent assembly having an assembly bifurcation for use with an angiological bifurcation of a blood vessel into two branched vessels, said bifurcated stent assembly comprising: a first stent (10;50;70;91) comprising a proximal stent portion (12;62;72;92), a first distal stent portion adapted to extend across the angiological bifurcation into one of the branched vessels, and an intermediate stent portion (14,18;58,60;78;95) extending distally relative to said assembly bifurcation; and a second stent (40;86) joined to said intermediate stent portion (14,18;58,60;78;95) of said first stent (10;50;70;91) and adapted to allow blood to flow from the proximal stent portion of said first stent into one of said branched vessels. Typically said proximal stent portion and first distal stent portion may be integral with one another.
Inventors
- 👤 George Goicoechea
- 👤 John Hudson
- 👤 Claude Mialhe
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 22:13
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/852; A61F2/02; A61F2/04; A61F2/06; A61F2/07; A61F2/86; A61F2/90; A61F2/95; A61F2/954; A61F2/958; A61F2002/061; A61F2002/065; A61F2002/075; A61F2002/828; A61F2/848; A61F2002/8486; A61F2210/00; A61F2210/0014; A61F2210/0019; A61F2220/00; A61F2220/0008; A61F2220/0016; A61F2220/0025; A61F2220/0033; A61F2220/0066; A61F2220/0075; A61F2230/00; A61F2230/0063; A61F2230/0067; A61F2240/00; A61F2240/001; A61F2250/00; A61F2250/0058; A61F2250/0096; A61F2250/0098; A61M; A61M25/00; A61M25/01; A61M25/06; A61M25/0662; Y; Y10; Y10S; Y10S623/00; Y10S623/902; Y10S623/903; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
107 words
A bifurcated stent assembly having an assembly bifurcation for use with an angiological bifurcation of a blood vessel into two branched vessels, said bifurcated stent assembly comprising: a first stent (10;50;70;91) comprising a proximal stent portion (12;62;72;92), a first distal stent portion adapted to extend across the angiological bifurcation into one of the branched vessels, and an intermediate stent portion (14,18;58,60;78;95) extending distally relative to said assembly bifurcation; and a second stent (40;86) joined to said intermediate stent portion (14,18;58,60;78;95) of said first stent (10;50;70;91) and adapted to allow blood to flow from the proximal stent portion of said first stent into one of said branched vessels.
Claim 2
Dependent Claim
26 words
A bifurcated stent as claimed in claim 1 wherein said proximal stent portion (72;92) and said first distal stent portion (80;94) are integral with one another.
Claim 3
Dependent Claim
35 words
A bifurcated stent as claimed in claim 1 or claim 2 wherein said proximal stent portion, said first distal stent portion, and said intermediate stent portion comprise a sinuous wire formed into a tubular configuration.
Claim 4
Dependent Claim
50 words
A bifurcated stent as claimed in claim 1, claim 2 or claim 3 wherein said bifurcated stent is made from a shape memory nitinol (nickel/titanium) wire having a tubular configuration and a diameter greater than the diameter on the blood vessel on which the stent is intended to be used.
Claim 5
Dependent Claim
41 words
A bifurcated stent as claimed in claim 3 or claim 4 wherein said wire defines a plurality of hoops such that the plane of the circumference of each hoop is disposed substantially perpendicular to the longitudinal axis of the bifurcated stent.
Claim 6
Dependent Claim
35 words
A bifurcated stent as claimed in claim 5 wherein the plane of the circumference of the hoop at each longitudinal end of the bifurcated stent is square to the longitudinal axis of the bifurcated stent.
Claim 7
Dependent Claim
19 words
A bifurcated stent as claimed in claim 5 or claim 6 further comprising securing means for securing adjacent hoops.
Claim 8
Dependent Claim
16 words
A bifurcated stent as claimed in claim 7 wherein said securing means comprise a loop element.
Claim 9
Dependent Claim
55 words
A bifurcated stent as claimed in any preceding claim wherein said intermediate stent portion (18;58,60;78;95) comprises a female cooperating portion, and said second stent (40;86) has a male engaging portion (42;88) adapted to engage said female cooperating portion; the arrangement being such that said first stent can be joined in situ to the second stent.
Claim 10
Dependent Claim
25 words
A bifurcated stent as claimed in claim 9 wherein said male engaging portion (42;88) comprises a frustoconical wall which flares outwardly towards its longitudinal extremity.
Claim 11
Dependent Claim
28 words
A bifurcated stent as claimed in claim 9 or claim 10 wherein said female portion (18;56,58;78;95) comprises a frustoconical wall which tapers radially inwardly towards its longitudinal extremity.
Claim 12
Dependent Claim
45 words
A bifurcated stent as claimed in any preceding claim wherein the proximal end (54;82;96) of said first stent is flared radially outwardly towards its extremity to engage the endoluminal surface of the blood vessel, thereby to resist longitudinal movement of the first stent in service.
Claim 13
Dependent Claim
22 words
A bifurcated stent as claimed in any preceding claim wherein said at least one intermediate stent portion comprises two intermediate stent portions.
Claim 14
Dependent Claim
73 words
A prosthesis for use with an angiological bifurcation of a blood vessel into two branched vessels comprising: a first bifurcated member (50;70;91) adapted to be retained in said blood vessel and at least one extended portion (14,18;58,60;78,76;93,95), and a second member adapted to extend across the angiological bifurcation and allow blood flow (86) to one of the branched vessels and to mate with said at least one extended portion of the first member.
Claim 15
Dependent Claim
16 words
A prosthesis as claimed in claim 14 wherein said first member includes two extended portions (58,60).
Claim 16
Dependent Claim
20 words
A prosthesis as claimed in claim 14 or claim 15 wherein said prosthesis comprises a stent and a graft layer.
Claim 17
Dependent Claim
17 words
A prosthesis as claimed in claim 16 wherein said graft layer is disposed internally of said stent.
Claim 18
Dependent Claim
17 words
A prosthesis as claimed in claim 16 wherein said graft layer is disposed externally of said stent.
Claim 19
Dependent Claim
23 words
A prosthesis as claimed in claim 16, claim 17 or claim 18 wherein said graft layer covers the entire length of said stent.
Claim 20
Dependent Claim
26 words
A prosthesis as claimed in any of claims 16-19 wherein said prosthesis includes a portion at which said graft layer is not supported by said stent.
Claim 21
Dependent Claim
31 words
A prosthesis as claimed in any of claims 14-20 wherein said first member comprises a proximal stent portion (62) and two extended portions (58,60) extending distally relative to a prosthesis bifurcation.
Claim 22
Dependent Claim
39 words
A prosthesis as claimed in any of claims 14-20 wherein said first member comprises a proximal stent portion (62;72;92) and said at least one extended portion includes a first distal stent portion extending distally relative to said angiological bifurcation.
Claim 23
Dependent Claim
28 words
A prosthesis as claimed in claim 22 wherein said proximal stent portion and said first distal stent portion are formed as a sinuous configuration within a tubular configuration.
Claim 24
Dependent Claim
17 words
A prosthesis as claimed in claim 23 wherein said sinuous configuration defines a plurality of perpendicular hoops.
Claim 25
Dependent Claim
25 words
A prosthesis as claimed in claim 16 wherein said stent is a shape memory nitinol and has a diameter greater than said two branched vessels.
Claim 26
Dependent Claim
69 words
A prosthesis as claimed in any of claims 14-25 wherein said at least one extended portion (58,60;78;95) comprises a frustoconical female cooperating portion which is tapered radially inward from its proximal end to its distal end; and said second member has a frustoconical male engaging portion (84) which is tapered radially inward from its proximal end to its distal end and is adapted to engage said female cooperating portion.
Claim 27
Dependent Claim
35 words
A prosthesis as claimed in any of claims 14-26 wherein said at least one extended portion comprises a frustoconical female cooperating portion which is tapered radially inward from its proximal end to its distal end.
Claim 28
Dependent Claim
41 words
A prosthesis as claimed in any of claims 14-27 wherein said second member has a frustoconical male engaging portion which is tapered radially inward from its proximal end to its distal end and is adapted to engage said female cooperating portion.
Claim 29
Dependent Claim
55 words
A prosthesis as claimed in any of claims 14-28 wherein: said graft layer comprises a first graft layer and a second graft layer; said first graft layer is disposed internally of said at least one extended portion which is a female cooperating portion; and said second graft layer is disposed externally of said second member.
Claim 30
Dependent Claim
100 words
A prosthesis as claimed in any of claims 14-28 wherein: said graft layer comprises a first graft layer and a second graft layer; said at least one extended portion is a female cooperating portion; said first graft layer is disposed externally of said female cooperating portion and folds over the distal extremity of said female engaging portion to form an inner sleeve; said second member is a distal stent portion which is a male engaging portion; and said second graft layer is disposed externally of said male engaging portion and contacts said inner sleeve to form a substantially blood-tight seal.
Claim 31
Dependent Claim
26 words
A prosthesis as claimed in any of claims 14-30 wherein said stent includes a portion having a graft layer disposed internally and externally of said stent.
Claim 32
Dependent Claim
28 words
A prosthesis as claimed in any of claims 14-31 wherein the graft layer comprises a bio-compatible fabric selected from the group consisting of polyester fabric and polytetrafluoroethylene fabric.
Claim 33
Dependent Claim
31 words
A prosthesis as claimed in any of claims 14-32 wherein the graft layer comprises a fabric selected from the group consisting of woven polyester fabric and a warp knitted polyester fabric.
Claim 34
Dependent Claim
26 words
A prosthesis as claimed in any of claims 14-33 further comprising barbs disposed adjacent to said graft layer to secure said prosthesis to said blood vessel.
References Cited (Backward Citations)
No citation records indexed.
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