초록 ▼

Improved, adaptable tissue-type heart valves and methods for their manufacture are disclosed wherein a dimensionally stable, pre-aligned tissue leaflet subassembly is formed and its peripheral edge clamped between and attached to an upper shaped wireform and a lower support stent. A variety of adapt

Improved, adaptable tissue-type heart valves and methods for their manufacture are disclosed wherein a dimensionally stable, pre-aligned tissue leaflet subassembly is formed and its peripheral edge clamped between and attached to an upper shaped wireform and a lower support stent. A variety of adaptable structural interfaces including suture rings, flanges, and conduits may be attached to the support stent with or without an outlet conduit disposed about the wireform to provide a tissue-type heart valve adaptable for use in either a natural heart or in mechanical pumping devices.

대표청구항 ▼

[ What is claimed is:] [28.] A tissue-type heart valve comprising:an annular wireform having a plurality of axially projecting commissures terminating in arcuate tips, the commissures being separated by arcuate cusps having a substantially larger radius of curvature than the tips, the commissures an

[ What is claimed is:] [28.] A tissue-type heart valve comprising:an annular wireform having a plurality of axially projecting commissures terminating in arcuate tips, the commissures being separated by arcuate cusps having a substantially larger radius of curvature than the tips, the commissures and tips being formed in a sinusoidal configuration with the commissures extending in the opposite axial direction from the cusps so that each commissure is defined by spaced apart portions of the wireform in adjacent cusps joined by one of the tips;a tissue leaflet subassembly attached within the annular wireform and formed by a plurality of substantially identical tissue leaflets, each of the leaflets having a coapting mating edge having opposing ends and a generally arcuate peripheral cusp extending therebetween coupled to one of the wireform cusps, the opposing ends of adjacent leaflets being attached to one another to define a plurality of pairs of mating leaflet ends each of which is associated with and extends between the spaced apart wireform portions of one of the commissures; anda generally cylindrical support stent having on one edge a plurality of alternating cusps and commissures adapted to matingly engage with the attached annular wireform and tissue leaflet subassembly, each stent commissure being associated with and extending substantially the same axial distance as one of the wireform commissures, wherein each pair of mating leaflet ends is separated by and attached around opposite sides of the associated stent commissure.