Abstract: An orthopaedic fixation system includes an anchoring element, which can be anchored to a bone and can be connected to a further anchoring element by means of a stabilisation element. The anchoring element may include a stabilisation element seating, into which the stabilisation element can be guided. The orthopaedic fixation system may also include an extension device for the anchoring element having a longitudinal extent with a proximal section and a distal section. The distal section can be detachably fixed to the anchoring element. The fixation system may further include a holding device with a probe seating for an extracorporeal ultrasound probe and a coupling device for coupling the holding device to the proximal section of the extension device. A targeting device for a fixation system and an orthopaedic fixation method are also described.