Patent ID: 11883571
Assignee: GAMBRO LUNDIA AB
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 12:
13. A method for setting the parameters in an apparatus for extracorporeal blood treatment, the apparatus comprising:
a filtration unit having a primary chamber and a secondary chamber separated by a semi-permeable membrane;
a blood withdrawal line in fluid communication with an inlet of the primary chamber;
a blood return line in fluid communication with an outlet of the primary chamber, the blood withdrawal line and the blood return line configured for connection to a patient cardiovascular system;
a dialysis supply line in fluid communication with at least one of an inlet of the secondary chamber, the blood withdrawal line, or the blood return line;
a dialysis effluent line in fluid communication with an outlet of the secondary chamber;
a preparation device for preparing dialysis fluid, the preparation device in fluid communication with the dialysis supply line and comprising a regulating device for regulating composition of the dialysis fluid; and
a control unit communicating with the regulating device and receiving a value representative of a first parameter, the first parameter selected from the group consisting of: (i) a plasma conductivity, (ii) a plasma conductivity-related parameter, (iii) a concentration of at least a substance sodium in blood, and (iv) a concentration-related parameter of at least a substance sodium in blood,
the method comprising:
setting a second parameter for the dialysis fluid in the dialysis supply line at a set point, the second parameter being at least one selected from the group consisting of: (i) a conductivity of the dialysis fluid, (ii) a conductivity-related parameter of the dialysis fluid, (iii) a concentration of at least a substance in the dialysis fluid, and (iv) a concentration-related parameter of at least a substance in the dialysis fluid,
wherein setting the second parameter includes calculating the second parameter as a function of a main contribution term based on the first parameter and as a function of an adjustment contribution term based on a concentration of at least a substance in the dialysis fluid, the substance in the dialysis fluid selected from the group consisting of: bicarbonate, potassium, acetate, lactate, citrate, magnesium, calcium, sulphate and phosphate, and
wherein the adjustment contribution term is an adjustment contribution applied to the sodium concentration set point for isoconductive dialysis, and wherein the adjustment contribution applied to the sodium concentration set point for the isoconductive dialysis provides a treatment selected from the group consisting of: isotonic dialysis, isonatremic dialysis, isonatrikalemic dialysis and a treatment that removes from, or adds to, the plasma a defined amount of at least a substance.