A medical device and a system for medical treatment comprising the medical device are disclosed. The medical device comprises a fluidic conduit and/or is configured to be operatively coupled to a fluidic conduit. The medical device comprises a flow regulator for regulating the flow of a fluid in the fluidic conduit and at least two movable elements, which are passively displaceable as a function of a fluidic pressure change in the fluidic conduit or actively displaceable for regulating the flow of fluid in the fluidic conduit. The medical device further comprises at least one transponder circuit comprising at least one transponder element chosen from a capacitor, an inductor, a resistor, or combinations thereof, being arranged with respect to the movable elements such that the transponder circuit has a capacitance or inductance or resistance or resonant frequency or Q factor, which changes as a function of the displacement of the movable elements. The system further comprises a control device comprising a transceiver, wherein the transceiver is configured to transmit energy to the transponder circuit and to read out the capacitance and/or the inductance and/or the resistance and/or the resonant frequency and/or the Q factor of the transponder circuit, such as to determine with the same transponder circuit whether there is a displacement of any of the movable elements. A foil comprising at least one transponder circuit to be arranged in the medical device is also disclosed.
