The present invention relates to interventional measurements. In order to provide improved interventional measurements, a device (10) for interventional measurements is provided. The device comprises a elongate body (12) configured to be at least partly inserted into an anatomical structure of a subject, and a transducer arrangement (14) configured to being energized, and to receive sensing signals and to provide respective signals to a console, and an amplifier circuit (16) configured to amplify the signals from the transducer arrangement； and a wiring arrangement (18) along the elongate body providing: i) electric energy supply for the transducer arrangement and the amplifier circuit； and ii) signal data transmission of the signals from the transducer arrangement. The transducer arrangement and the amplifier circuit are provided in a distal end region of the elongate body. The wiring arrangement comprises a ground and a supply. The transducer arrangement is connected to the supply and to the ground； and the amplifier circuit is connected to the supply, to the transducer arrangement and to the ground. Between the transducer arrangement and the ground, a connection selector (20) is provided that is electrically non-conductive below a threshold current or threshold voltage, and electrically conductive above the threshold current or the threshold voltage.
