A weight detection device is disclosed for determining a patients weight, for dialysis treatment, that includes patient scales arranged to carry out a weighing procedure to detect the actual weight of a patient, preferably a network connection arranged to connect a component of the weight detection device, generating information and/or data related to the determining of the patients weight and/or to the weighing procedure, to a data network, an output device arranged to output the actual weight of the patient, and an image information recording device that includes a field of view directed to the patient scales for the visual detection of weighing procedures arranged to record the course of a weighing procedure such that a cause of a change in the actual weight occurring in the course of dialysis therapy can be determined from a recording of the weighing procedure.
