Patent ID: 6325774
Filing Date: 2001-12-04
Classification: A61M

Abstract:
Dialysis apparatus comprising:means for circulating a dialysis liquid containing sodium chloride and sodium bicarbonate through a haemodialyser;means for infusing a patient with at least one solution containing at least one ionic substance A absent from the dialysis liquid, the substance A having a determined concentration (A)sol in the infusion solution;means for measuring the conductivity of the dialysis liquid upstream and downstream of the haemodialyser;means for calculating an actual dialysance D using at least two conductivity values (Cd1in, Cd1out, Cd2in, Cd2out) measured respectively upstream and downstream of the haemodialyser in at least two successively prepared dialysis liquids and using the formula: ##EQU6##where Qd is the flow rate of dialysis liquid;means for determining a flow rate Qinf of infusion solution such that the concentration of the substance A inside the patients body tends towards a desired concentration (A)des, as a function of the dialysance D, of the concentration (A)sol of the substance A in the infusion solution, and of the desired concentration (A)des;regulating means for regulating the flow rate of infusion solution; andcontrol means for driving the means for regulating the flow rate of the infusion solution such that this flow rate is substantially equal to the determined flow rate Qinf.