Shunt valve

Details Shunt valve Shunt valve

1982-04-28

1983-06-14

Rosenbaum, C. Fred

Surgery

Devices transferring fluids from within one area of body to...

With flow control means

A61M 2700

Patent

active

043877150

ABSTRACT:
In a surgically implantable shunt system for venting cerebrospinal fluid in the treatment of hydrocephaly, a valve and the method of testing it are disclosed. The valve comprises an elongate hollow valve body into which a flat plate tightly fits, partitioning the valve body into an outlet and an inlet chamber. The flat plate has a circular aperture connecting the chambers and upon which rests a spherical ball of diameter larger than the aperture. A flat spring biases the ball against the circular periphery of the aperture creating a circular seal and providing a precisely defined back pressure, low hysteresis and low susceptibility to bridging by debris. Testing for leakage is accomplished by illuminating with light of a suitable frequency the aperture with ball seated and detecting any light transmitted therethrough.

REFERENCES:
patent: 4332255 (1982-06-01), Hakim et al.

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