摘要 |
In a distal targeting system a hand-held location pad is integral with a gui de sec-tion for a drill or similar surgical instrument, and has a plurality of magnetic field gen-erators. A sensor, such as a wireless sensor, having a plurality of fiel d transponders, is disposed in an orthopedic appliance, such as an intramedullary nail. The sensor is capa-ble of detecting and discriminating the strength and direction of the different fields generated by the field generators. Control circuitry, preferably located in the location pad is responsive to a signal of the sensor, and determines the displacement and relative directions of an axis of the guide section, and a bore in the orthopedic appliance. A screen display and optional speaker in the location pad provide an operator- perceptible indication that enables the operator to adjust the position of the guide section so as to align its position and direction with the bore. |