Patent ID: 6635026
Filing Date: 2003-10-21
Classification: A61M,Y10S

Abstract:
Haemofiltration machine designed to cooperate with a haemofilter having a first compartment and a second compartment separated by a semi-permeable membrane, the first compartment having an inlet which can be connected to a blood withdrawing tube and an outlet which can be connected to a blood return tube, and the second compartment having an outlet which can be connected to a spent liquid evacuation tube, the haemofiltration machine comprising:means for preparing a first injectable solution from at least one concentrated solution; means for injecting, at an injection flow rate Qpre, the first solution into the blood withdrawing tube; means for infusing into the blood return tube a second solution containing at least one ionic substance A having a given concentration [A]post which is different from the concentration [A]pre of this substance A in the first solution; means for determining an infusion flow rate Qpost of the second solution in order for the concentration of the substance A in the patient's internal medium to tend towards a desired concentration [A]des, as a function of the concentration [A]post of the substance A in the second solution, the desired concentration [A]des, the injection flow rate Qpre of the first solution and the blood flow rate QB; and control means for governing the infusion means such that the flow rate of the second solution is substantially equal to the determined flow rate Qpost.