Suture rings for rotatable artificial heart valves
First Claim
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1. A rotatable artificial heart valve apparatus comprising:
- a) an annular valve body having a blood flow passage extending longitudinally therethrough and an outer surface;
b) at least one occluder mounted within the blood flow passageway of said annular valve body to intermittently block the flow of blood through said passageway;
c) a suture ring mounted on the outer surface of said valve body and rotatable thereon, said suture ring comprising;
i) a ring member having an inner surface, an outer surface, a proximal edge, and a distal edge; and
,ii) a needle-penetrable fabric covering disposed on said ring member, a portion of said fabric being interposed between the inner surface of said ring member and the outer surface of said valve body;
d) at least one protuberance formed on the inner surface of said ring member defining the only surface on said valve body which compresses said portion of said fabric between the inner surface of said ring member and said outer surface of the valve body.
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Abstract
A suture ring for a rotatable artificial heart valve apparatus has a ring member covered by a fabric material. A portion of the fabric material covers a portion of the inner surface of the ring member. At least one protuberance is formed on the inner surface of the ring member so as to mitigate the frictional resistance to rotation which results from compression of the fabric between the suture ring and the heart valve. Thus, desirable rotation of the heart valve relative to the suture ring is assured over a range of thicknesses of the fabric material.
189 Citations
40 Claims
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1. A rotatable artificial heart valve apparatus comprising:
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a) an annular valve body having a blood flow passage extending longitudinally therethrough and an outer surface; b) at least one occluder mounted within the blood flow passageway of said annular valve body to intermittently block the flow of blood through said passageway; c) a suture ring mounted on the outer surface of said valve body and rotatable thereon, said suture ring comprising; i) a ring member having an inner surface, an outer surface, a proximal edge, and a distal edge; and
,ii) a needle-penetrable fabric covering disposed on said ring member, a portion of said fabric being interposed between the inner surface of said ring member and the outer surface of said valve body; d) at least one protuberance formed on the inner surface of said ring member defining the only surface on said valve body which compresses said portion of said fabric between the inner surface of said ring member and said outer surface of the valve body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 35)
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12. A rotatable artificial heart valve apparatus comprising:
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a) an annular valve body having a blood flow passageway extending longitudinally therethrough and an outer generally cylindrical surface having a nominal diameter and a groove therein having a diameter less than the nominal diameter; b) at least one occluder mounted within the blood flow passageway of said annular valve body to intermittently block the flow of blood through said passageway; c) a suture ring mounted on the outer surface of said valve body and rotatable thereon, said suture ring comprising; i) a ring member having an inner surface, an outer surface, a proximal edge, and a distal edge; and
,ii) a needle-penetrable fabric covering disposed on said ring member, a portion of said fabric being interposed between the inner surface of said ring member and the outer surface of said valve body; d) at least one protuberance formed on the outer surface of said valve body projecting outward from the outer surface and defining the only surface on said valve body which compresses said portion of said fabric between the inner surface of said ring member and said outer surface of the valve body. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A suture ring which is adapted to be rotatably mountable on the generally cylindrical outer surface of a prosthetic heart valve apparatus, said suture ring comprising:
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a) a ring member having an inner surface, an outer surface, a proximal edge, and a distal edge; b) a needle-penetrable fabric covering disposed on said ring member, a portion of said fabric being interposed between the ring member and the outer surface of the prosthetic heart valve apparatus, when the suture ring is mounted on said prosthetic heart valve apparatus; and c) at least one protuberance formed on said inner surface of said ring member defining the only surface on said suture ring which compresses said portion of said fabric between the inner surface of said ring member and the outer surface of the prosthetic heart valve apparatus, when the suture ring is mounted on said prosthetic heart valve apparatus. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34)
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36. A rotatable artificial heart valve apparatus comprising:
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a) an annular valve body having a blood flow passageway extending longitudinally therethrough and an outer surface; b) a suture ring mounted on the outer surface of said valve body and rotatable thereon, said suture ring including an inner surface, an outer surface, a proximal edge, and a distal edge; c) a fabric sheet being interposed between the inner surface of said suture ring and the outer surface of said valve; and d) at least one protuberance formed on either the outer surface of said valve body or the inner surface of said suture ring for compressing said fabric sheet between the inner surface of said suture ring and said outer surface of the valve body, said at least one protuberance defining a surface area of no more than 20% of the smaller of the surface areas of the inner surface of the suture ring and the outer surface of the valve body, wherein the at least one protuberance defines the only surface on said suture ring which compresses said fabric sheet between the inner surface of said suture ring and the outer surface of said valve body. - View Dependent Claims (37, 38, 39, 40)
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Specification