Abstract: A minimally invasive examination device for assisting in the positioning of an interventional instrument in the body of a patient. The device allows improved positioning of an interventional instrument in the body of a patient. The device comprises: a coupling element on which at least one first sensor is arranged and that is coupled to a proximal end of the interventional instrument, as a result of which the first sensor is connected to the interventional instrument (16) via the coupling element, a signal detection and processing device that is connected to the first sensor in a wireless or wired manner so as to transmit signals, wherein the signal detection and processing device (20, 34) is designed to process the signals from the first sensor, and a display device that is designed to visually display processing results from the signal detection and processing device.