Exchange transfusion machine

Details Exchange transfusion machine Exchange transfusion machine

1982-05-17

1984-07-03

Pellegrino, Stephen C.

Surgery

Blood drawn and replaced or treated and returned to body

604 7, 604236, 417538, A61M 500

Patent

active

044577478

ABSTRACT:
Disclosed is an exchange transfusion device with two coupled, automatically driven syringes, one in a blood withdrawal system and one in a fresh blood injection system; the coupling insuring that the volume of blood removed from a baby in the withdrawal system will be simultaneously replaced by an equal volume of fresh blood from the injection system. This simultaneous equivolumetric withdrawal and injection overcomes the physiological problems arising from the non-simultaneity of equal volumes of withdrawal and injection. The syringes in the withdrawal and injection phase of an exchange transfusion are driven at a slow steady rate, but on the refill and discard phase are driven at a high rate to avoid clotting of standing blood in the withdrawal and injection systems.

REFERENCES:
patent: 1531698 (1925-03-01), Janes
patent: 1845479 (1932-02-01), Carpenter
patent: 2093344 (1937-09-01), Wandel
patent: 2625932 (1953-01-01), Salisbury
patent: 2625933 (1953-01-01), Salisbury
patent: 2689565 (1954-09-01), Gobel
patent: 2842124 (1950-07-01), James
patent: 3450134 (1969-06-01), Willgerodt

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