Blood extraction and reinfusion flow control system and method

Details Blood extraction and reinfusion flow control system and method Blood extraction and reinfusion flow control system and method

1985-11-22

1987-04-14

Coven, Edward M.

Surgery

Blood drawn and replaced or treated and returned to body

Constituent removed from blood and remainder returned to body

604 66, 128DIG13, A61M 103

Patent

active

046575294

ABSTRACT:
A blood extraction and reinfusion flow control system includes a blood pump coupled to pump intravenous fluid to or from a subject, a pressure sensor coupled to sense extra veinous pressure at the subject, and a microprocessor based flow control subsystem. The flow control subsystem optimizes the flow rate by sensing pressure at at least two different fluid flow test points and extrapolating and translating the test point data to generate a flow control curve. The blood pump is then operated at a maximum speed that is limited by a desired maximum flow command and the flow control curve to maximize flow without vein collapse or damage during both blood extraction and reinfusion.

REFERENCES:
patent: 3949734 (1976-04-01), Edwards et al.
patent: 4086924 (1978-05-01), Latham, Jr.
patent: 4285464 (1981-08-01), Latham, Jr.
patent: 4401431 (1983-08-01), Arp
patent: 4447191 (1984-05-01), Bilstad et al.
patent: 4468219 (1984-08-01), George et al.
patent: 4481827 (1984-11-01), Bilstad et al.

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