Adjustable-resistance anti-siphon device

Details Adjustable-resistance anti-siphon device Adjustable-resistance anti-siphon device

1990-12-10

1993-03-09

Hafer, Robert A.

Surgery

Means and methods for collecting body fluids or waste material

604 9, 623 66, A61M 2700

Patent

active

051922657

ABSTRACT:
An adjustable-resistance anti-siphon device for a cerebrospinal fluid shunt is provided. The device has a substantially rigid housing having an internal cavity which contains a first chamber and a second chamber, the first chamber having at least one flexible wall, an inlet port and an outlet port, the ports passing through apertures in the housing; the second chamber being gas-filled and being in pressure communication with at least a portion of the at least one flexible wall of the first chamber; and gas pressure control means connected to said gas-filled chamber whereby the pressure in said gas-filled chamber may be adjusted.

REFERENCES:
patent: 3889687 (1975-06-01), Harris et al.
patent: 3901245 (1975-08-01), Spitz et al.
patent: 4056095 (1977-11-01), Rey et al.
patent: 4364395 (1982-12-01), Redmond et al.
patent: 4457752 (1984-07-01), Vadasz
patent: 4867741 (1989-09-01), Portnoy
patent: 5069663 (1991-12-01), Sussman

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