| 摘要 |
Apparatus and method for locating distal locking holes in an implanted intramedullary rod is disclosed. An insert member having at least one high-energy permanent magnet carried with its poles along an axis transverse to a longitudinal axis of the insert member at a distal end thereof is disclosed. The insert member is inserted into an implanted intramedullary rod and aligned so that the poles of the high-energy permanent magnet(s) are aligned with an axis of the distal locking hole(s) of the implanted intramedullary rod. A detector magnet, also constructed from a high-energy magnetic material, is utilized to find the location of the distal locking hole axis by means of attraction to the inserted high-energy magnet. It has been found that by using a high-energy magnetic material such as neodymium, a high force of attraction can exist exterior of the bone to locate the axis. An indication of this location may be made with a marking instrument and a hole drilled through the bone and distal locking hole for insertion of a distal locking screw.
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