Three stage intracranial pressure relief valve having single-pie

Details Three stage intracranial pressure relief valve having single-pie Three stage intracranial pressure relief valve having single-pie

1984-05-08

1986-12-09

Rosenbaum, C. Fred

Surgery

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

With flow control means

604247, 604249, 137508, A61M 500

Patent

active

046278320

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 movable diaphragm, one side of which is in pressure communication with the drainage location of the body and the other side of which is in pressure communication with the ventricular spaces of the brain. A valve assembly, actuable by displacement of the diaphragm in response to applied pressure differentials, 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 mechanism 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. To simplify construction, the valve includes a single-piece valve stem having a ramp surface at one end and a fluid restrictor surface at the other end which cooperate with the valve diaphragm to provide the three operating modes.

REFERENCES:
patent: 28722 (1860-06-01), Whitaker
patent: 79436 (1868-06-01), Bechtel
patent: 1139455 (1915-05-01), Gase
patent: 1159214 (1915-11-01), Gueux
patent: 1199152 (1916-09-01), Bruce
patent: 2207382 (1940-07-01), McNamara
patent: 2290151 (1942-07-01), McCollum
patent: 2879783 (1956-11-01), Taplin
patent: 3768508 (1973-10-01), Schulte
patent: 3769982 (1973-11-01), Schulte
patent: 3804113 (1974-04-01), Garcea
patent: 3827439 (1974-08-01), Schulte et al.
patent: 3889687 (1975-06-01), Harris et al.
patent: 3901245 (1975-08-01), Spitz et al.
patent: 3991768 (1976-11-01), Portnoy
patent: 3999553 (1976-12-01), Spitz et al.
patent: 4103689 (1978-08-01), Leighton
patent: 4156422 (1979-05-01), Hildebrandt et al.
patent: 4167952 (1979-09-01), Reinicke
patent: 4332255 (1982-06-01), Hakim et al.
patent: 4437493 (1984-03-01), Okuka et al.

Affiliated with

Also associated with

Rating

Three stage intracranial pressure relief valve having single-pie does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Three stage intracranial pressure relief valve having single-pie, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Three stage intracranial pressure relief valve having single-pie will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1383614