Single needle alternating blood flow system

Details Single needle alternating blood flow system Single needle alternating blood flow system

1982-09-24

1984-12-25

Pellegrino, Stephen C.

Surgery

Blood drawn and replaced or treated and returned to body

Constituent removed from blood and remainder returned to body

604 31, 604 52, 604 67, 128DIG13, A61M 103

Patent

active

044901356

ABSTRACT:
A two-pump single needle hemodialysis system is provided in which a flexible blood accumulator bag is located between the dialyzer and the second, venous blood pump. The accumulator bag is filled as the first, arterial blood pump is operated. Blood is pumped through the dialyzer and into the bag until the bag is full and taut. At this time, a rise in pressure is detected and the venous blood pump is activated to withdraw blood from the accumulator bag. The use of the accumulator bag assures that low blood pressures are maintained in the system.

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patent: 4385630 (1983-05-01), Gilcher et al.

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