Abstract
During the operation of proximal femoral nail antirotation (PFNA), surgeons may run across a rare problem that the helical blade fails to be tightened and locked by clockwise turning of the impactor handle. At this moment, three options can be taken: first, replace the unlocked helical blade and re-insert another new one; second, keep the unlocked helical blade in place, proceed and finish the operation as usual; and third, as we described, keep the first helical blade in situ and tighten and lock it by other instruments, such as the SW4.0 mm hexagonal screwdriver for the distal interlocking screw, which is already in the instrument box. The third option is the best, as it keeps the operation going and remains the fixation quality as usual.
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