Method and apparatus for controlled ultrafiltration during hemod

Details Method and apparatus for controlled ultrafiltration during hemod Method and apparatus for controlled ultrafiltration during hemod

1986-06-06

1988-05-31

Spear, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

2102572, 21032176, B01D 1300

Patent

active

047479507

ABSTRACT:
A method of hemodialytic ultrafiltration in a device utilizing a dialysate flow path, a hemodialyzer, a first receptacle and a second receptacle comprises supplying fresh dialysate to the first receptacle. Spent dialysate is withdrawn from the second receptacle at substantially the same rate fresh dialysate is supplied to the first receptacle. This method includes variably withdrawing fresh dialysate from the first receptacle and supplying same to the hemodialyzer, and variable withdrawing spent dialysate from the hemodialyzer and delivering same to the second receptacle. The dialysate levels in the receptacles are maintained at relatively constant, pre-determined levels. Further, this method includes withdrawing a controlled amount of dialysate from the dialysate flow path between and including the receptacles to thereby effect a withdrawal of ultrafiltrate from the patient's blood into the flow path to substantially balance the amount of dialysate withdrawn therefrom.
A hemodialysis ultrafiltration apparatus carries out the method substantially as described above.

REFERENCES:
patent: 3757947 (1973-09-01), Wakefield et al.
patent: 4178240 (1979-12-01), Pinkerton
patent: 4372846 (1983-02-01), Yamagami et al.
patent: 4486303 (1984-12-01), Brous

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