Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Heart valve – Having rigid or semirigid pivoting occluder
Patent
1989-11-14
1991-06-25
Isabella, David J.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Heart valve
Having rigid or semirigid pivoting occluder
1375121, 137527, A61F 224
Patent
active
050263919
ABSTRACT:
An annular valve body having a central passageway for the flow of blood therethrough with two curved leaflets each of which is pivotally supported on an accentric positioned axis in the central passageway for moving between a closed position and an open position. The leaflets are curved in a plane normal to the eccentric axis and positioned with the convex side of the leaflets facing each other when the leaflets are in the open position. Various parameters such as the curvature of the leaflets, the location of the eccentric axis, and the maximum opening angle of the leaflets are optimized according to the following performance criteria: maximize the minimum peak velocity through the valve, maximize the net stroke volume, and minimize the mean forward pressure difference, thereby reducing thrombosis and improving the hemodynamic performance.
REFERENCES:
patent: 4263680 (1981-04-01), Reul et al.
patent: 4689046 (1987-08-01), Bokros
patent: 4822353 (1989-04-01), Bokros
patent: 4846307 (1989-07-01), Knoch et al.
patent: 4863459 (1989-09-01), Olin
patent: 4872875 (1989-10-01), Hwang
"Computer Design of Mitral Valve Prostheses," McQueen & Peskin, vol. 1 of the Proceedings of SECTAM XII, May 1984.
"Modeling Prosthetic Heart Valves for Numerical Analysis of Blood Flow in the Heart", by Peskin & McQueen, Journal of Computational Physics, vol. 37, #1, Aug. 1980.
"Fluid Dynamics of the Mitral Valve: Physiological Aspects of a Mathematical Model", McQueen, Peskin & Yellin, American Physiological Journal, 242, 1982.
"Design to Manufacture of the St. Jude Prosthetic Heart Valve", Hansen, U. of Texas, Colloquium, Sep. 1979.
"Computer-Assisted Design of Pivoting Disc Prosthetic Mitral Valves", McQueen & Peskin, Journal of Thoracic and Cardiovascular Surgery, vol. 86, #1, Jul. 1983.
McQueen David M.
Peskin Charles S.
Iantorno Stephanie L.
Isabella David J.
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