| 摘要 |
An intramedullary nail targeting apparatus for targeting and drilling screw openings in the intramedullay nail is provided herein. A preferred version of the targeting apparatus includes a magnetic targeting device (116), a nail extension (110) for connecting to an intramedullary nail (60), and a magnet member (70), preferably in a "bucking configuration, " for affixing to the intramedullary nail at a defined position relative to the screw openings in the nail. The nail extension includes a targeting arm (120) with one or more bores which align with the screw openings in the nail when the targeting arm is aligned with the intramedullary nail. The magnetic targeting device includes a support member with a sensor array (33) that extends through one of the bores on the targeting arm to target the magnet member, thereby aligning the targeting arm with the intramedullary nail. A second bore on the targeting arm can then be used for drilling through the bone at the position of an aligned screw opening. Methods for using the targeting apparatus for targeting and drilling screw openings in intramedulary nails or openings in bone plates are also described herein.
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