The invention relates to a method for the return of blood from a blood treatment apparatus, preferably from a dialysis apparatus. In accordance with the invention, the substituate pump contained in the treatment apparatus displaces the blood by means of correspondingly transported substituate fluid until it is detected in corresponding detectors that substituate fluid is flowing back in the line instead of blood. From this moment in time, the blood volume is further displaced in a controlled manner until it has reached the line outlet of the corresponding line.
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