Apparatus for measuring ultrafiltration rate

Details Apparatus for measuring ultrafiltration rate Apparatus for measuring ultrafiltration rate

1974-11-04

1976-11-09

Spear, Jr., Frank A.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 96M, 210321B, B01D 3100

Patent

active

039909735

ABSTRACT:
A system is disclosed for measuring the ultrafiltration rate in an artificial kidney. The system comprises a flow rate meter connected with the outlet of the dialyzer, means for placing the flow control system in bypass so that the dialysate flow is diverted around the dialyzer, and means for maintaining the static pressure of dialysate in the dialyzer during bypass at a value equal to the average of the dynamic pressure prior to bypass. The flow rate indicated by the meter during the bypass interval is equal to the rate of ultrafiltrate flow through the dialyzing medium. Preferably, the pressure in the dialyzer during bypass is maintained by a negative pressure regulating means which responds to the average value of dialysate pressure in the dialyzer during both the run and bypass operations.

REFERENCES:
patent: 3416664 (1968-12-01), Kumme et al.
patent: 3441136 (1969-04-01), Serfass et al.
patent: 3527700 (1970-09-01), Goldhaber
patent: 3669880 (1972-06-01), Marahtz et al.
patent: 3795318 (1974-03-01), Crane et al.
patent: 3844940 (1974-10-01), Kopf et al.

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