Method and apparatus for controlling the circulation of blood in

Details Method and apparatus for controlling the circulation of blood in Method and apparatus for controlling the circulation of blood in

1992-02-05

1994-06-07

Hafer, Robert A.

Surgery

Blood drawn and replaced or treated and returned to body

604 5, 604 28, 604 30, A61M 103

Patent

active

053185110

ABSTRACT:
A single needle extracorporeal blood circuit for connection to a blood treatment device includes an arterial portion having an arterial reservoir, an end for connection to the needle, an end for connection to the blood treatment device, and a first valve for flow communicating the needle with the arterial reservoir. The blood circuit also includes a venous portion having a venous reservoir, an end for connection to the blood treatment device, an end for connection to the needle, and a second valve for flow communicating the needle with the venous reservoir. Detectors monitor quantities of liquid in the arterial and venous reservoirs so that the first valve is opened in response to the presence of a first predetermined quantity of liquid in the arterial reservoir or a second predetermined quantity of liquid in the venous reservoir. Similarly, the second valve is opened in response to the presence of either a third predetermined quantity of liquid in the arterial reservoir or a fourth predetermined quantity of liquid in the venous reservoir.

REFERENCES:
patent: 4650457 (1987-03-01), Morioka et al.
patent: 4776837 (1988-10-01), Ropp
patent: 4828543 (1989-05-01), Weiss et al.
patent: 4885001 (1989-12-01), Leppert
patent: 4940455 (1990-07-01), Guinn
patent: 5092836 (1992-03-01), Polaschegg
patent: 5098373 (1992-03-01), Polaschegg

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