EP0179562B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A heart valve prosthesis
Assignee: University of Glasgow
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Filing: 1985-09-16
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Granted: 1989-07-12
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Expires: 2005-09-16
Abstract
Abstract The invention is a heart valve prosthesis in which a plurality of heart valve leaflets (17) are mounted on a frame (11) from which a plurality of leaflet-mounting pins (15) extend. A surrounding sleeve (18) surrounds the frame (11) in order to clamp the leaflets (17) in position between frame (11) and sleeve (18).
Inventors
- 👤 John Fisher
- 👤 David John Wheatley
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 04:18
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2412
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
177 words
A heart valve prosthesis comprising an annular support frame member (11) for a plurality of flexible tissue valve elements (17), said support frame member (11) having a plurality of spaced posts (13) defining openings therebetween to permit a portion of each valve element (17) to flex from an open position to a closed position, means for securing the valve elements to the support frame member comprising an annular sleeve member (18) concentric with said support frame member (11) adapted to clamp a non-flexing portion of each valve element (17) in operative position between the support frame (11) and said sleeve (18), one of said sleeve member (18) and said frame member (11) having a plurality of projections (15) extending from said one towards said other member and said members being adapted to be secured to each other characterised in that the projections (15) are pins which serve to secure the sleeve and frame members together and to effect operative location of each element (17) by extending therethrough for engagement with holes in the other of said members.
Claim 2
Dependent Claim
177 words
A heart valve prosthesis comprising an annular support frame member (11) for a plurality of flexible tissue valve elements (17), said support frame member (11) having a plurality of spaced posts (13) defining openings therebetween to permit a portion of each valve element (17) to flex from an open position to a closed position, means for securing the valve elements to the support frame member comprising an annular sleeve member (18) concentric with said support frame member (11) adapted to clamp a non-flexing portion of each valve element (17) in operative position between the support frame (11) and said sleeve (18), one of said sleeve member (18) and said frame member (11) having a plurality of projections (15) extending from said one towards said other member and said members being adapted to be secured to each other characterised in that the projections (15) are pins which serve to secure the sleeve and frame members together and to effect operative location of each element (17) by extending therethrough for engagement with holes in the other of said members.
Claim 3
Dependent Claim
35 words
A prosthesis as claimed in claim 1, in which the pins (15) are formed on the support frame member (11) and extend outwardly therefrom to ' engage holes (19a) in the surrounding sleeve member (18).
Claim 4
Dependent Claim
44 words
A prosthesis as claimed in any of claims 1 or 2, in which the sleeve member (18) is provided with a plurality of integral extensions (20), each of which is adapted to overlie one of the posts (13) of the support frame member (11).
Claim 5
Dependent Claim
30 words
A prosthesis as claimed in claim 3, in which each frame post (13) is provided with a projecting stud or studs (16) on which the valve elements (17) are mounted.
Claim 6
Dependent Claim
35 words
A prosthesis as claimed in claim 4, in which each projecting stud (16) is formed on the support frame post (13) and is provided with means for securing a valve element or elements (17) thereto.
Claim 7
Dependent Claim
29 words
A prosthesis as claimed in claim 5 in which the securing means is a washer or the like adapted to be releasably clipped on to its associated stud (16).
Claim 8
Dependent Claim
33 words
A prosthesis as claimed in any of claims 3 to 6, in which each sleeve extension (20) has formed therein a slot (21) adapted to receive means for joining adjacent tissue leaflets (17).
Claim 9
Dependent Claim
66 words
A prosthesis as claimed in any preceding claim in which the sleeve member (18) is provided with a plurality of slits (22) spaced circumferentially from each other and each extending partially along the length of the sleeve member (18), said slits (22) permitting deformation of the sleeve member (18) in order to enable releasable interengagement of the sleeve member (18) about the support frame member (11).
Claim 10
Dependent Claim
42 words
A prosthesis as claimed in any preceding claim, in which an annular locking ring (30) is provided for location about the external surface of the sleeve in order to retain the sleeve member (18) in engagement with the support frame member (11).
Claim 11
Dependent Claim
37 words
A prosthesis as claimed in any preceding claim, in which the support frame member (11) is entirely surrounded by a covering (24) of tissue whereby the inner face of the covered support frame member (11) is seamless.
Claim 12
Dependent Claim
30 words
A prosthesis as claimed in claim 10, in which the base (12) of the frame member (11) and the sleeve member (18) is covered with a continuous piece of tissue.
Claim 13
Dependent Claim
23 words
A prosthesis as claimed in any preceding claim, in which the sleeve member (18) is entirely surrounded by a covering (27) of cloth.
Claim 14
Dependent Claim
30 words
A prosthesis as claimed in claim 12, in which the cloth covering (27) has an extension formed into a sewing ring (36) extending around the outer circumference of the prosthesis.
Claim 15
Dependent Claim
36 words
A prosthesis as claimed in claim 4, in which the integral extensions (20) of the sleeve member (18) are linked by a connecting suture (23) to reduce the possibility of snaring during insertion of the prosthesis.
References Cited (Backward Citations)
No citation records indexed.
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