A system for controlling a controllable gastric band (1), having a control unit (11), wherein the gastric band (1) includes a nonextensible back (4) and a chamber (2) arranged on the stoma side of the back and capable of being filled with a fluid, which chamber is in connection with a second chamber (5) and has at least one sensor (7) for the detection of the pressure on the gastric wall. The sensor (7) can be connected with a device (8) for the wireless transmission of the detected pressure values to the control unit (11). The control unit (11) can include a device (13) for receiving transmitted pressure data from the at least one sensor (7). Also, at least one memory (9, 14) for storing the pressure values detected and a device (16) for processing the time courses of the pressure values detected.
