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It was reported that during a case using the spine guidance 5 software, after the left l5 screw was placed, neuromonitoring informed the surgeon that the motors dropped by a significant amount.The surgeon proceeded to remove the left l5 screw and placed a pedicle finder through that cannulated hole using navigation and it was shown that the instrument was through the foremen.The surgeon proceeded to do a decompression and continue with placing the remaining screws, using only the intraoperative scans for the remaining screws.The remainder of the screws were accurate which was confirmed by x-rays.There were no adverse consequences and the procedure was completed successfully.
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