GB2279134A
Expired / Lapsed
GB
⏱️ 0.0 years remaining
Bioprosthetic valve
Assignee: University Hospital
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Filing: 1994-05-26
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Granted: —
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Expires: 2014-05-26
Abstract
Abstract A bioprosthetic valve comprises a support ring 7 having three spaced apart end stops 21 projecting upwardly therefrom, a stent post ring 9 having three spaced apart stent posts 11 joined by a brace 13 pivotally connected thereto and adapted to engage respective ones of the end stops so as to permit outward pivoting of the stent posts and to prevent inward pivoting thereof, a leaflet valve 27 having three generally triangular leaflets 29, 31, 33 defining respective cusps, the leaflets being joined at respective commissures, and a sewing ring 37, for attaching the leaflet valve to the stent post ring and support ring. A wire frame 23 is received in a slot in the top of each stent post. In operation the projections 14 on the stent posts engage in internal portions 19 formed by members 17 so that the stent posts can pivot outwardly but are prevented from pivoting inwardly by engagement with stops 21. <IMAGE>
Inventors
- 👤 Ivan Vesely
- 👤 Slawomir Krucinski
- 👤 Gordon Campbell
- 👤 Derek Boughner
- 👤 Mohan Dokainish
Bibliographic Details
Application Number
—
Jurisdiction
GB
Data Source
google_patents
Last Synchronized
2026-10-22 22:08
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2412; A61F2/2418; A61F2/2409; Y; Y10; Y10S; Y10S623/00; Y10S623/90
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
107 words
A bioprosthetic heart valve comprising: a) a support ring having three spaced apart end stops projecting upwardly therefrom; b) three spaced apart stent posts adapted to pivot outwardly relative to said supporting and to engage respective ones of said end stops so as to prevent inward pivoting thereof; c) leaflet valve means formed from an aortic root and having three generally triangular leaflets defining respective cusps which are adapted to open and close during heart systole and diastole, respectively, said leaflets being joined at respective commissures adjacent said aortic root; and d) means for attaching said leaflet valve means to said stent posts and said support ring.
Claim 2
Dependent Claim
107 words
A bioprosthetic heart valve comprising: a) a support ring having three spaced apart end stops projecting upwardly therefrom; b) three spaced apart stent posts adapted to pivot outwardly relative to said supporting and to engage respective ones of said end stops so as to prevent inward pivoting thereof; c) leaflet valve means formed from an aortic root and having three generally triangular leaflets defining respective cusps which are adapted to open and close during heart systole and diastole, respectively, said leaflets being joined at respective commissures adjacent said aortic root; and d) means for attaching said leaflet valve means to said stent posts and said support ring.
Claim 3
Dependent Claim
23 words
The bioprosthetic heart valve of claim 1, further comprising a stent post ring to which said stent posts are connected for pivoting movement.
Claim 4
Dependent Claim
73 words
The bioprosthetic heart valve of claim 2, wherein each of said end stops further comprises a first member projecting from an outer diameter of said support ring, said first member being of generally spherical segment shape defining a hollow internal portion, and a second member projecting from said outer diameter toward an inner diameter of said support ring,, said second member extending substantially above said first member and being of generally arcuate shape.
Claim 5
Dependent Claim
117 words
The bioprosthetic heart valve of claim 3, wherein each of said stent posts further comprises a main body portion connected to said stent post ring at a pivot point adjacent a lower end of said stent post such that a portion of said main body moves inwardly no further than 0 1 11 said second member above said pivot point during diastole, said lower end having an outward protrusion below said pivot point adapted to hook into said hollow internal portion of said first member during diastole, whereby said stent post is prevented from excessive inward pivoting during diastole while being permitted said stent Post to pivot outwardly by twisting of said stent post ring during systole.
Claim 6
Dependent Claim
48 words
The bioprosthetic heart valve of claim 1. further comprising a wire frame conforming in shape to said respective cusps of said leaflet valve means and connected to an upper distal end of each of said stent posts. for supporting said leaflet valve means on said stent post ring.
Claim 7
Dependent Claim
28 words
The bioprosthetic heart valve of claim 5. wherein said wire frame is received within cooperatively dimensioned slots disposed in the distal end of each of said stent posts.
Claim 8
Dependent Claim
32 words
The bioprosthetic heart valve of claim 1. wherein said support ring further incorporates a scalloped extension from a bottom surface thereof so as to conform said bottom surface to aortic valve geometry.
Claim 9
Dependent Claim
27 words
The bioprosthetic heart valve of claim 1, further comprising a sewing ring circumscribing said leaflet valve means for attaching said leaflet valve means to said support ring.
Claim 10
Dependent Claim
18 words
The bioprosthetic heart valve of claim 1, further comprising a cloth covering sewn onto said leaflet valve means.
Claim 11
Dependent Claim
19 words
The bioprosthetic heart valve of claim 1, further comprising a cloth covering sewn onto said stent 1 12 posts.
Claim 12
Dependent Claim
23 words
The bioprosthetic heart valve of claim 1, wherein said leaflet valve means consists of one of 5 either animal tissue or human tissue.
Claim 13
Dependent Claim
17 words
The bioprosthetic heart valve of claim 10, wherein said animal tissue is chemically treated pig aortic valve.
Claim 14
Dependent Claim
16 words
The bioprosthetic heart valve of claim 10, wherein said animal tissue is chemically treated calf pericardium.
Claim 15
Dependent Claim
18 words
The bioprosthetic heart valve of claim 1, wherein said stent post ring is fabricated from a flexible polymer.
Claim 16
Dependent Claim
28 words
The bioprosthetic heart valve of claim 1, wherein said stent post ring is adapted to limit said outward pivoting of said stent posts to approximately 1611 from vertical.
Claim 17
Dependent Claim
55 words
The bioprosthetic heart valve of claim 1, wherein each of said stent posts has a pair of pivot arms projecting from opposite sides thereof, and wherein each of said end stops includes a pair of holes for receiving respective ones of said pivot arms so as to permit said outward pivoting of said stent posts.
Claim 18
Dependent Claim
84 words
A bioprosthetic valve comprising: a) a support ring having three spaced apart end stops projecting upwardly therefrom; b) three spaced apart stent posts adapted to pivot outwardly relative to said supporting and to engage respective ones of said end stops so as to prevent inward pivoting thereof; 13 c) leaflet valve means having three generally triangular leaflets defining respective cusps which are adapted to open and close; and d) means for attaching said leaflet valve means to said stent posts and said support ring.
Claim 19
Dependent Claim
84 words
A bioprosthetic valve comprising: a) a support ring having three spaced apart end stops projecting upwardly therefrom; b) three spaced apart stent posts adapted to pivot outwardly relative to said supporting and to engage respective ones of said end stops so as to prevent inward pivoting thereof; 13 c) leaflet valve means having three generally triangular leaflets defining respective cusps which are adapted to open and close; and d) means for attaching said leaflet valve means to said stent posts and said support ring.
References Cited (Backward Citations)
US4725274A
Cited
WO1994001060A1
Cited
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