A treatment system (200, 300, 400) for treating a part of a corpus of a living being, the treatment system (200, 300, 400) comprising: - a treatment device (100, 150, 180) for temporarily or permanently placing a therapeutic device (112, 162, 188, 210) in a part of a corpus of a living being, the treatment device (100, 150, 180) comprising an elongated body (102, 152) for being inserted in the part of the corpus, the elongated body (102, 152) comprising: - a channel for guiding the therapeutic device (112, 162, 188, 210) to a specific position (P1, P3, P4) within the channel and/or for holding the therapeutic device (112, 162, 188, 210) at the specific position (P1, P3, P4) within the channel, - an impedance sensor element (104, 154, 206, 306) being configured to be coupled to a detection device (214, 320) for detecting the presence of the therapeutic device (112, 162, 188, 210) at the specific position (P1, P3, P4) on basis of a change of a signal provided by the impedance sensor element (104, 154, 206, 306), - a detection device (214, 320) connectable to the impedance sensor element (104, 154, 206, 306) of the treatment device (100, 150, 180) for detecting a change of the signal provided by the impedance sensor element (104, 154, 206, 306) in response to the presence of the therapeutic device (112, 162, 188, 210) at the specific position (P1, P3, P4), - a tracking device (218, 324) connectable to the impedance sensor element (104, 154, 206, 306) of the treatment device (100, 150, 180) for tracking a relative position of the impedance sensor element (104, 154, 206, 306) with respect to a fixed position of a field generator, the field generator generating an electromagnetic field which is detectable by the impedance sensor element (104, 154, 206, 306). - a treatment device (100, 150, 180) for temporarily or permanently placing a therapeutic device (112, 162, 188, 210) in a part of a corpus of a living being, the treatment device (100, 150, 180) comprising an elongated body (102, 152) for being inserted in the part of the corpus, the elongated body (102, 152) comprising: - a channel for guiding the therapeutic device (112, 162, 188, 210) to a specific position (P1, P3, P4) within the channel and/or for holding the therapeutic device (112, 162, 188, 210) at the specific position (P1, P3, P4) within the channel, - an impedance sensor element (104, 154, 206, 306) being configured to be coupled to a detection device (214, 320) for detecting the presence of the therapeutic device (112, 162, 188, 210) at the specific position (P1, P3, P4) on basis of a change of a signal provided by the impedance sensor element (104, 154, 206, 306), - a detection device (214, 320) connectable to the impedance sensor element (104, 154, 206, 306) of the treatment device (100, 150, 180) for detecting a change of the signal provided by the impedance sensor element (104, 154, 206, 306) in response to the presence of the therapeutic device (112, 162, 188, 210) at the specific position (P1, P3, P4), - a tracking device (218, 324) connectable to the impedance sensor element (104, 154, 206, 306) of the treatment device (100, 150, 180) for tracking a relative position of the impedance sensor element (104, 154, 206, 306) with respect to a fixed position of a field generator, the field generator generating an electromagnetic field which is detectable by the impedance sensor element (104, 154, 206, 306).