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PROSTHETIC CARDIAC VALVE

  • US 3,744,060 A
  • Filed: 06/10/1971
  • Issued: 07/10/1973
  • Est. Priority Date: 06/10/1971
  • Status: Expired due to Term
First Claim
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1. A prosthetic valve for permanent implantation in a cardiac orifice, said valve comprising a tubular valve body formed with at least two angularly spaced outwardly projecting sinus-like bulges in its wall defining internal hollows extending nearly the full length of the body, whereby the external shape of said valve body is convex in axial section, a peripheral suture ring secured to the outside of and extending around said convex body and a number of thin flexible impermeable cusps within said body, one registering with the internal hollow provided by each bulge, each cusp being sealed to said valve body along upstream and axially extending edges but having a free downstream edge which terminates in the axial direction short of said downstream edge of the corresponding hollow and which has a length such that when said valve is open said cusps can surround a substantially cylindrical passageway through said valve and the downstream edge of said hollows intercepts part of the flow through the valve so that vortices are set up in said hollows tending to close the cusps, but when said valve is closed said free downstream edges of said cusps can meet and seal against those of the adjacent cusps along radial surfaces.

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