Device to control the transmembrane pressure in a plasmapheresis

Details Device to control the transmembrane pressure in a plasmapheresis Device to control the transmembrane pressure in a plasmapheresis

1981-06-25

1983-11-01

Nilson, Robert G.

Fluid handling

Self-proportioning or correlating systems

Self-controlled branched flow systems

137 82, 137 87, 210137, 2104332, 210637, 251 611, B01D 3100

Patent

active

044125534

ABSTRACT:
A fluid flow control device comprises first second, and third fluid pathways. The first and second pathways are adapted for communication with separate sources of pressurized fluid. The third pathway is coupled in flow communication with the first pathway and includes a flexible wall which forms an interface with a portion of the second pathway. The flexible wall meters the flow communication between the first and third pathways in response to fluid pressure fluctuations in the second pathway. The fluid pressure in the first pathway is thereby elevated until substantial equilibrium with the fluid pressure in the second pathway occurs, and is thereafter continuously adjusted in response to subsequent fluctuations of fluid pressure in the second pathway to maintain this condition of substantial equilibrium.

REFERENCES:
patent: 3052064 (1962-09-01), Kaeser
patent: 3057376 (1962-10-01), Agutter
patent: 3150674 (1964-09-01), Connaught
patent: 3791397 (1974-02-01), Janu
patent: 3929148 (1975-12-01), Midy
patent: 4303068 (1981-12-01), Zelman
patent: 4315520 (1982-02-01), Atkinson

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