A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
128/127, 137/56
A61M 27/00 (2006.01) F16K 15/14 (2006.01)
Patent
CA 1248425
"INTERCRANIAL PRESSURE REGULATOR VALVE" ABSTRACT OF THE DISCLOSURE An intercranial pressure regulator valve adapted particularly for the treatment of hydrocephalus and the draining of cerebrospinal fluid (CSF) from a ventricle in the brain to another location in the patient's body includes a movable, flexible diaphragm having first and second surfaces of substantial area which are contacted by the fluid which is being drained and the fluid in the area to which the CSF is to be drained, respectively. A valve seat on the diaphragm is movable therewith and the valve seat includes a passage for the flow of the fluid which is being drained through the diaphragm. A ball closure valve is positioned on the cephalad side of the diaphragm. When the pressure differential on both surfaces of the diaphragm is low, the valve seat flexes into engagement with the ball closure valve to close the passage. When the pressure differential between these two surfaces increases, the diaphragm flexes in response to the increase such that the valve seat moves away from the ball closure valve to open the passage and drain the CSF from the ventricle to the other location in the body.
443304
Nmt Neurosciences (ip) Inc.
Osler Hoskin & Harcourt Llp
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