Distal targeting of locking screws in intramedullary nails
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United States of America Patent
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-
Jun 13, 2006
Grant Date -
Feb 19, 2004
app pub date -
Jul 18, 2002
filing date -
Jul 18, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
In a distal targeting system a hand-held location pad is integral with a guide section for a drill or similar surgical instrument, and has a plurality of magnetic field generators. A sensor, such as a wireless sensor, having a plurality of field transponders, is disposed in an orthopedic appliance, such as an intramedullary nail. The sensor is capable 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.
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