CA1243453A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Heart valve prosthesis
Assignee: University of Glasgow
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Filing: 1985-09-27
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Granted: 1988-10-25
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Expires: 2005-09-27
Abstract
Abstract ABSTRACT OF THE DISCLOSURE The invention is a heart valve prosthesis in which a plurality of heart valve leaflets are mounted on a frame from which a plurality of leaftlet-mounting pins extend. A surroun-ding sleeve surrounds the frame in order to clamp the leaflets in position between frame and sleeve.
Inventors
- 👤 John Fisher
- 👤 David J. Wheatley
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-10-22 16:02
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2412
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
137 words
A heart valve prosthesis comprising an annular sup-port frame for a plurality of flexible tissue valve elements, said support frame having a plurality of spaced posts defining openings therebetween to permit a portion of each valve element to flex from an open position to a closed position, and means for securing the valve elements to the support frame comprising an outer annular sleeve concentric with said support frame adapted to clamp a non-flexing portion of each valve element in operative position between the support frame and said sleeve characterized in that said support frame and said sleeve are releasably secured to each other by means of a plurality in interengaging project tions extending from one of the frame and sleeve member and releasably and connected to the other member and on which the valve elements are mounted.
Claim 2
Dependent Claim
137 words
A heart valve prosthesis comprising an annular sup-port frame for a plurality of flexible tissue valve elements, said support frame having a plurality of spaced posts defining openings therebetween to permit a portion of each valve element to flex from an open position to a closed position, and means for securing the valve elements to the support frame comprising an outer annular sleeve concentric with said support frame adapted to clamp a non-flexing portion of each valve element in operative position between the support frame and said sleeve characterized in that said support frame and said sleeve are releasably secured to each other by means of a plurality in interengaging project tions extending from one of the frame and sleeve member and releasably and connected to the other member and on which the valve elements are mounted.
Claim 3
Dependent Claim
28 words
A prosthesis as claimed in claim 1, in which the projections are formed on the support frame and extend outwardly therefrom to engage holes in the surrounding sleeve.
Claim 4
Dependent Claim
34 words
A prosthesis as claimed in claim 1, in which the sleeve is provided with a plurality of integral extensions, each of which is adapted to overlie one of the posts of the support frame.
Claim 5
Dependent Claim
27 words
A prosthesis as claimed in claim 3, in which each frame post is provided with a projecting stud or studs on which the valve elements are mounted.
Claim 6
Dependent Claim
32 words
A prosthesis as claimed in claim 4, in which each projecting stud is formed on the support frame post and is pro-vided with means for securing a valve element of elements thereto.
Claim 7
Dependent Claim
25 words
A prosthesis as claimed in claim 5, in which the securing means is a washer adapted to be releasably clipped on to its associated stud.
Claim 8
Dependent Claim
26 words
A prosthesis as claimed in claim 3, in which each sleeve extension has formed therein a slot adapted to receive means for joining adjacent tissue leaflets.
Claim 9
Dependent Claim
53 words
A prosthesis as claimed in claim 1, in which the sleeve is provided with a plurality of slits spaced circumferen-tially from each other and each extending partially along the length of the sleeve, said slits permitting deformation of the sleeve in order to enable releasble interengagement of the sleeve about the support frame.
Claim 10
Dependent Claim
36 words
A prosthesis as claimed in claim 1, in which an annular looking ring is provided for location about the external surface of the sleeve in order to retain the sleeve in engagement with the support frame.
Claim 11
Dependent Claim
31 words
A prosthesis as claimed in claim 1, in which the support frame is entirely surrounded by a covering of tissue whereby the inner face of the covered support frame is seamless.
Claim 12
Dependent Claim
25 words
A prosthesis as claimed in claim 10, in which the base of the frame and the sleeve is covered with a continuous piece of tissue.
Claim 13
Dependent Claim
19 words
A prosthesis as claimed in claim 1, in which the sleeve is entirely surrounded by a covering of cloth.
Claim 14
Dependent Claim
28 words
A prosthesis as claimed in claim 12, in which the cloth covering has an extension formed into a sewing ring extend-ing around the outer circumference of the prosthesis.
Claim 15
Dependent Claim
32 words
A prosthesis as claimed in claim 3, in which the integral extensions of the sleeve are linked by a connecting suture to reduce the possibility of snaring during insertion of the prosthesis.
References Cited (Backward Citations)
No citation records indexed.
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