Hemodialysis machine with automatic priming by induced pressure

Details Hemodialysis machine with automatic priming by induced pressure Hemodialysis machine with automatic priming by induced pressure

1997-09-15

1999-01-26

Kim, John

Liquid purification or separation

Flow, fluid pressure or material level, responsive

Plural elements controlled

210108, 210143, 21032169, 210645, 210646, 210793, B01D 6130, B01D 6132

Patent

active

058634215

ABSTRACT:
A hemodialysis machine is described that has an extracorporeal circuit that is primed automatically prior to connection of the patient to the machine. The priming is accomplished by filling the extracorporeal circuit with a priming fluid, such as a saline or dialysate solution or blood. The blood pump and clamps in the arterial and venous lines are operated by a control system in a fashion to create multiple brief pressure pulses in the priming fluid. The pressure pulses shear air bubbles present on the blood side of the dialyzer membrane off the membrane. The blood pump is then operated to clear the bubbles from the dialyzer compartment where they are removed from the priming fluid by conventional bubble trap apparatus.

REFERENCES:
patent: 3756234 (1973-09-01), Kopp
patent: 3830234 (1974-08-01), Kopp
patent: 4332264 (1982-06-01), Gortz
patent: 4464172 (1984-08-01), Lichtenstein
patent: 4923612 (1990-05-01), Trivett et al.
patent: 5336165 (1994-08-01), Twardowski
Gentles et al., Programmable Machine for Dialyzer Reuse, Med. & Biol. Eng. & Comput., Nov. 1980 pp. 765-771.

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