Natural tissue heart valve prosthesis
First Claim
Patent Images
1. A heart valve prosthesis comprising:
- a natural tissue heart valve having an inflow end, an outflow end, and a generally cylindrical side wall portion extending between said inflow end and said outflow end, said valve including a plurality of leaflets, each of said leaflets having an associated side wall portion and side edges, adjacent side edges of adjacent said leaflets and adjacent portions of respective said associated side wall portions defining commissures;
an annular ring of a substantially flexible material positioned around said valve wall intermediate said inflow and outflow ends; and
a sheath of natural tissue attached around said valve wall and said ring, said sheath having an inflow end extending beyond said inflow end of said heart valve and defining an implantation flange, said sheath having an outflow end with a plurality of lobes extending beyond said outflow end of said heart valve.
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Abstract
A heart valve prosthesis (88; 128) having a plurality of leaflets (18, 20 and 22; 138, 140 and 142). The valve (10; 130) is covered with a sheath (90; 172) of natural tissue. The sheath (90; 172) extends from an inflow end (12; 132) of the valve (10; 130) beyond an outflow end (14; 134) of the valve (12; 132) to define a plurality of lobes (98, 100 and 102; 182, 184 and 186). A substantially flexible annular ring (60; 162) may be positioned between the sheath (90; 172) and the heart valve (10; 132) to provide additional stability.
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Citations
27 Claims
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1. A heart valve prosthesis comprising:
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a natural tissue heart valve having an inflow end, an outflow end, and a generally cylindrical side wall portion extending between said inflow end and said outflow end, said valve including a plurality of leaflets, each of said leaflets having an associated side wall portion and side edges, adjacent side edges of adjacent said leaflets and adjacent portions of respective said associated side wall portions defining commissures; an annular ring of a substantially flexible material positioned around said valve wall intermediate said inflow and outflow ends; and a sheath of natural tissue attached around said valve wall and said ring, said sheath having an inflow end extending beyond said inflow end of said heart valve and defining an implantation flange, said sheath having an outflow end with a plurality of lobes extending beyond said outflow end of said heart valve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A heart valve prosthesis comprising:
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a natural tissue heart valve comprising; a generally cylindrical side wall portion extending between an inflow end and an outflow end, said side wall portion having an outer surface; and a plurality of leaflets dispose&
ed within said side wall portion, each of said leaflets having side edges and an associated side wall portion, adjacent side edges of adjacent said leaflets and respective adjacent portions of said associated side wall portions defining commissures;an outer sheath of natural tissue covers said outer surface of said heart valve, said outer sheath having an outflow end portion extending beyond said outflow end of said heart valve adjacent said commissures to define a plurality of lobes. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method of making a heart valve prosthesis comprising the steps of:
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providing a natural tissue heart valve having an inflow end, an outflow end, a generally cylindrical side wall portion extending between said inflow end and said outflow end, said heart valve including a plurality of leaflets disposed within said side wall portion, each of said leaflets having a pair of side edges and an associated side wall portion, adjacent side edges of adjacent said leaflets and respective adjacent portions of said associated side wall portions defining commissures; positioning an annular ring of a substantially flexible and resilient material around said side wall portion intermediate said inflow and outflow ends of said heart valve; covering said annular ring and said outer surface of said heart valve with a sheath of natural tissue, an sheath having an inflow end portion and an outflow end portion; and extending said outflow end portion of said sheath beyond said outflow end of said heart valve to define a plurality of lobes adjacent said commissures. - View Dependent Claims (26, 27)
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Specification