Tri-leaflet mechanical heart valve

Details Tri-leaflet mechanical heart valve Tri-leaflet mechanical heart valve

2005-05-24

2005-05-24

Isabella, David J. (Department: 3738)

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

Heart valve

Having rigid or semirigid translating occluder

C623S002200, C623S002220

Reexamination Certificate

active

06896700

ABSTRACT:
A tri-leaflet heart valve includes an annular valve base with an inner surface forming an orifice through which blood flows from the upstream side to the downstream side. Three protruding hinges, each with concave sockets on opposite sides, are formed on the inner surface. Each hinge has a downstream face and an upstream face connected by a ridge. Three leaflets are respectively arranged between adjacent hinges. Each leaflet has round pivots on both sides that rest inside the concave sockets, allowing the leaflets to freely rotate in the annular valve base. When the leaflets are subject to a positive pressure from the blood flow, the leaflets are pushed open and allow a central flow. When the leaflets are subject to a negative pressure, the leaflets are closed to occlude the blood flow.

REFERENCES:
patent: 5123918 (1992-06-01), Perrier et al.
patent: 5405381 (1995-04-01), Olin
patent: 5628791 (1997-05-01), Bokros et al.

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