1. A method of optimizing the flow of dialysate into the blood treatment unit, comprising the steps of: a) perform preselection mode of operation and the smallest allowable value of the parameter dialysis efficiency b) determine the current measured values of blood flow and dialysate in the blood treatment unit c ) measuring the UV absorbance of at least one of uremic substances in the effluent dialysate or in extracorporeal blood circulation blood treatment unit d) transmitting the measured values of the UV-absorption and current measured ve masks blood flow and dialysate in the central processing unit e) determine the flow of the solution for dialysis and / or blood-optimized flow of the dialysate and / or the relative ratio of the two streams within a range of Q / Q, determined for the selected operating mode in the central processing unit without falling, as a consequence, lower than the lowest permissible value of the selected parameter dialysis efficiency ilie ) define dialysis solution flow and / or blood-optimized flow of the dialysate and / or the relative ratio Ob me bandwidth dialysate and blood within the range of V / V, determined for the selected operating mode in the central processing unit, without falling, as a consequence, lower than the lowest permissible value of the selected parameter dialysis efficiency f) displaying a certain fluid flow change for dialysis and / or blood in the central processing unit and / or automatic re-adjustment is performed in accordance with the calculated change in the blood treatment unit and g) repeating steps b) -f) after suitable
