Bileaflet heart valve with external leaflets

Details Bileaflet heart valve with external leaflets Bileaflet heart valve with external leaflets

1990-07-20

1992-01-07

Frinks, Ronald

Prosthesis (i.e., artificial body members), parts thereof, or ai

Heart valve

Having rigid or semirigid pivoting occluder

137512, 137527, A61F 224, A16K 1500, A16K 1700, A16K 2104

Patent

active

050787390

ABSTRACT:
An improved heart valve prosthesis (20) suited for replacement of any of the four valves in the heart. The invention includes a generally annular orifice ring (22) having a fluid flow bore with a smooth inner wall (26) through which blood flows, controlled by two pivoted leaflet occluders (40), supported at the downstream edge of the orifice ring.
The occluders are supported at the outboard edges of the orifice ring, overlapping the fluid flow bore and generally about each other to seal backflow and regulate flow in one direction only. Occluder travel is limited by bending moment resistance of the occluder hinge and lateral blood flow. Occluder hinges are unloaded at a point between fully opened and fully closed.
The bearing surfaces between the occluder means and the annular orifice are wide enough to allow the valve to be constructed from materials of different hardnesses.

REFERENCES:
patent: 3589392 (1971-06-01), Meyer
patent: 4017911 (1977-04-01), Kafesjian et al.
patent: 4114202 (1978-11-01), Roy et al.
patent: 4178638 (1979-12-01), Meyer
patent: 4263680 (1981-04-01), Reul et al.
patent: 4373216 (1983-02-01), Klawitter
patent: 4878909 (1989-11-01), Parravicini

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