Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Heart valve – Having rigid or semirigid pivoting occluder
Patent
1989-06-30
1990-08-21
Green, Randall L.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Heart valve
Having rigid or semirigid pivoting occluder
A61F 224
Patent
active
049502875
ABSTRACT:
A mechanical artificial heart valve is provided and consists of an annular shaped orifice, to which a single (or multiple) bicurved leaflet(s) is (are) hinged. The curves are planar and are generated from two intersecting circular acrs. The valve is constructed to cause a predominately accelerating flow through the orifice. This significantly reduces the flow separation from the leaftlets. In addition, the leaflets are shaped so as to reduce the closing reflux volume through the orifice during the regurgitation phase of flow. These improvements tend to significantly decrease the work load on the heart.
REFERENCES:
patent: Re31040 (1982-09-01), Possis
patent: 4240161 (1980-12-01), Huffstutler et al.
patent: 4276658 (1981-07-01), Hanson et al.
patent: 4689046 (1987-08-01), Bokros
patent: 4775378 (1988-10-01), Knoch et al.
patent: 4846830 (1989-07-01), Knoch et al.
T. H. Reif and M. C. Huffstutler, Jr., "Design Considerations for the Moniscience Pivoting Disc Cardiac Valve Prosthesis", The International Journal of Artificial Organs/vol. 6, No. 3, 1983/pp. 131-138.
Dr. Hermann Schlichtung, "Boundary-Layer Theory", 7th Ed., McGraw-Hill Co., New York, 1979, pp. 168-173.
Green Randall L.
Iantorno Stephanie L.
Republic Medical Products Inc.
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