The present invention relates to a peritoneal dialysis appliance for carrying out peritoneal dialysis treatment with recurring cycles, the cycles comprising a fill phase, a dwell period and a drain phase for the dialysis liquid, wherein the appliance has a control unit and a measurement device for determining the filling and/or drainage rate of the dialysis liquid to/from a patient, wherein the control unit is configured to carry out a comparison between a time curve, determined by the measurement device, of the filling and/or drainage rate during a fill and/or drain phase, and a corresponding reference curve and, on the basis of this comparison, to detect a disturbance in the filling and/or drainage of the dialysis liquid to/from the patient.
