Suture rings for prosthetic heart valves
First Claim
1. A suture ring assembly for a heart valve, said suture ring assembly comprises:
- a suture ring having an interior surface proportioned to surround an exterior surface of a generally annular valve body and rotate relative to said valve body, said suture ring further adapted to axially engage with said valve body; and
an annular retaining ring dimensioned to fit in a space between said interior surface of said suture ring and said exterior surface of said valve body, said annular retaining ring being adapted for maintaining engagement between said valve body and said suture ring and to prevent disengagement thereof.
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Abstract
A suture ring assembly for a prosthetic heart valve is provided which includes a suture ring body, suture ring flange, and an interior engagement surface that are formed as a unitary structure composed of pyrocarbon material or the like. The suture ring flange extends radially outward from said suture ring body and may be of an arcuate or straight design. Moreover, the suture ring flange has a plurality of pre-fabricated holes extending axially therethrough and is particularly designed for securing the assembly to the residual heart tissue. The suture ring interior engagement surface is proportioned to surround the exterior surface of the valve body such that it can rotate relative to the heart valve body. The suture ring assembly and the valve body are specifically designed to axially engage each other so as to prevent disengagement in either axial direction. Any axial displacements that may occur during the opening and closing of the prosthetic heart valve are absorbed or dampened with spring-like, shock-absorbing mechanisms formed as part of a retaining ring which is part of the suture ring assembly.
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Citations
20 Claims
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1. A suture ring assembly for a heart valve, said suture ring assembly comprises:
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a suture ring having an interior surface proportioned to surround an exterior surface of a generally annular valve body and rotate relative to said valve body, said suture ring further adapted to axially engage with said valve body; and an annular retaining ring dimensioned to fit in a space between said interior surface of said suture ring and said exterior surface of said valve body, said annular retaining ring being adapted for maintaining engagement between said valve body and said suture ring and to prevent disengagement thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A suture ring and heart valve combination comprising:
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a heart valve having a generally annular valve body providing a blood flow passageway and occluder means mounted within said valve body for opening and closing said passageway; a suture ring having an interior surface constructed to surround an exterior surface of said valve body and rotate relative to said valve body, said suture ring including a circular protrusion extending radially inward from said interior surface of said suture ring, said valve body having a circular ledge protruding from said exterior surface of said valve body which axially engages said circular protrusion so as to prevent disengagement thereof in one axial direction, said suture ring being adapted to rotate in bearing contact with said circular ledge of said valve body; an annular retaining ring located in a space between said interior surface of said suture ring and said exterior surface of said valve body for maintaining axial engagement between said valve body and said suture ring so as to prevent disengagement thereof in the other axial direction; and a suture ring flange extending radially outward from said suture ring and further having a plurality of holes extending therethrough in a generally axial direction. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A heart valve prosthesis comprising:
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a generally annular valve body providing a blood flow passageway and occluder means mounted within said valve body for opening and closing said passageway; a suture ring having an interior surface and being proportioned to surround an exterior surface of said valve body and rotate relative to said valve body; said suture ring and said valve body being constructed so that disengagement thereof in one axial direction is prevented; and retaining means for preventing disengagement of said valve body and said suture ring in the other axial direction; said suture ring having a suture ring flange extending radially outward from said suture ring which has a plurality of holes extending therethrough in a generally axial direction; and said suture ring flange having an arcuate configuration adapted to simulate a configuration of residual aortic natural leaflets. - View Dependent Claims (18, 19, 20)
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Specification