The invention relates to a minimally invasive examination device for assisting in the positioning of an interventional instrument (16) in the body of a patient. One object of the invention is to provide a device that allows improved positioning of an interventional instrument in the body of a patient. The device according to the invention comprises:a coupling element (12, 24) on which at least one first sensor (14, 24a, 24b, 24c, 24n+1) is arranged and that is coupled to a proximal end of the interventional instrument (16), as a result of which the first sensor (14, 24a, 24b, 24c, 24n+1) is connected to the interventional instrument (16) via the coupling element (12, 24),a signal detection and processing device (20, 34) that is connected to the first sensor (14, 24a, 24b, 24c, 24n+1) 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 (14, 24a, 24b, 24c, 24n+1), anda display device (22) that is designed to visually display processing results from the signal detection and processing device (20, 34).
