Three stage implantable valve

Details Three stage implantable valve Three stage implantable valve

1992-12-17

1994-08-09

Rosenbaum, C. Fred

Surgery

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

With flow control means

604247, 137508, A61M 2700

Patent

active

053361660

ABSTRACT:
An implantable drainage device for the treatment of hydrocephalus is described. The device operates like a combination of three valves including a first pressure regulation valve in series with an assembly having a flow regulation valve in parallel with a second pressure regulation valve. The device allows cerebrospinal fluid communication between a source location in the brain and a drainage location when the pressure differential therebetween exceeds a first predetermined threshold. Above the first predetermined threshold, the device opens to allow a flow of cerebrospinal fluid therethrough, maintaining a substantially constant pressure differential across the device. When the pressure differential is between the first predetermined threshold and a second, higher, predetermined threshold a substantially constant flow rate is maintained. When the pressure differential exceeds the second predetermined threshold, the device allows a fluid flow rate sufficient to maintain a second predetermined pressure differential across the valve.

REFERENCES:
patent: 3886948 (1975-06-01), Hakim
patent: 3889687 (1975-06-01), Harris et al.
patent: 3924635 (1975-12-01), Hakim
patent: 4106510 (1978-08-01), Hakim et al.
patent: 4332255 (1982-06-01), Hakim et al.
patent: 4387715 (1983-06-01), Hakim et al.
patent: 4551128 (1985-11-01), Hakim et al.
patent: 4557721 (1985-12-01), Hooven
patent: 4595390 (1986-06-01), Hakim et al.
patent: 4621654 (1986-11-01), Holter
patent: 4627832 (1986-12-01), Hooven et al.
patent: 4675003, Hooven
patent: 4681559 (1987-07-01), Hooven
patent: 4714458 (1987-12-01), Hooven
patent: 4714459 (1987-12-01), Hooven
patent: 4729762 (1988-03-01), Documenis
patent: 4741730 (1988-05-01), Dormandy, Jr. et al.
patent: 4769002 (1988-09-01), Hooven
patent: 4776838 (1988-10-01), Sainte-Rose et al.
patent: 4776839 (1988-10-01), Documenis
patent: 4781672 (1988-11-01), Hooven

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