Surgery – Devices transferring fluids from within one area of body to... – With flow control means
Patent
1985-12-23
1987-06-23
Truluck, Dalton L.
Surgery
Devices transferring fluids from within one area of body to...
With flow control means
137539, 604247, A61M 2700
Patent
active
046750037
ABSTRACT:
An implantable valve for allowing the passage of cerebrospinal fluid (CSF) from a ventricle of the brain to a suitable drainage location in the body includes a housing having an inlet and outlet with valving means in the housing to control fluid flow from the inlet to the outlet. The valving means includes various parts which are coaxially aligned between the inlet and outlet, the valving means having a valve seat, a valve closure means, a fluid flow restrictor means and a positioning means to control variable positioning of the valve closure means relative to the parts of the valving means. The valving means is actuable in response to applied pressure differentials, and regulates passage of CSF from the ventricular spaces to the drainage location. When the pressure differential is relatively small, the valve operates in a constant pressure mode to maintain a predetermined pressure differential across the valve. In response to a sudden increase in differential pressure, the valve operates in a constant flow mode to maintain a desired relatively constant CSF flow rate through the valve. Above a predetermined pressure differential, the valve operates in a constant pressure mode to maintain a predetermined maximum pressure differential across the valve.
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Cordis Corporation
Truluck Dalton L.
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