Flowrate control for a blood flow system

Details Flowrate control for a blood flow system Flowrate control for a blood flow system

1982-09-24

1984-08-07

Coven, Edward M.

Surgery

Blood drawn and replaced or treated and returned to body

Constituent removed from blood and remainder returned to body

128DIG3, A61M 103

Patent

active

044641648

ABSTRACT:
Blood flowrate in a hemodialysis system is controlled in accordance with the relative speeds of two periodically operated blood pumps. Information as to the speeds of the two pumps is converted to flowrate information, which is used to determine the mean flowrate of blood through the system. The mean blood flowrate may be altered by changing the speeds of the blood pumps in a control system which maintains a constant ratio of pump speeds.

REFERENCES:
patent: 3756234 (1973-09-01), Kopp
patent: 3830234 (1974-08-01), Kopp
patent: 3848592 (1974-11-01), Willock
patent: 3902490 (1975-09-01), Jacobsen et al.
patent: 3985134 (1976-10-01), Lissot et al.
patent: 4231366 (1980-11-01), Schael
patent: 4401431 (1983-08-01), Arp
"New System for Single-Needle Dialysis", British Medical Journal, vol. 281, p. 1109, (Oct. 25, 1980).

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