Pulsatile flow-accommodating fluid shunt

Details Pulsatile flow-accommodating fluid shunt Pulsatile flow-accommodating fluid shunt

1993-05-10

1995-02-07

Green, Randall L.

Surgery

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

604 10, 604247, A61M 500

Patent

active

053871880

ABSTRACT:
In a cerebrospinal fluid shunt including a flow control device forming a portion of a fluid conduit, a capacitive element is provided for reducing overdrainage of cerebrospinal fluid due to the pulsatile nature of cerebrospinal fluid flow. The capacitive element includes a reservoir having a base and a housing for the base which cooperatively define a fluid flow pathway through the reservoir. A pair of spaced, substantially parallel, flexible diaphragms form opposite sides of the housing such that each flexible diaphragm has an outer surface which forms an exterior surface of the reservoir, and an inner surface in contact with and subject to pressure variations of cerebrospinal fluid within the reservoir. A raised ring surrounds each diaphragm and forms a recess in which the respective diaphragm is positioned. The capacitive element accommodates the pulsatile nature of cerebrospinal fluid flow between a cerebrospinal fluid source and the flow control valve by varying the fluid capacity of the reservoir.

REFERENCES:
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patent: 4795437 (1989-01-01), Schulte et al.
patent: 4861331 (1989-08-01), East et al.
patent: 5154693 (1992-10-01), East et al.
patent: 5176627 (1993-01-01), Watson

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