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3Schanz screw insertion

The axis of the humeral shaft is identified in a true lateral view, and a line is drawn along that axis (as illustrated).

The intersection of these two lines marks the safe position for proximal Schanz screw insertion.

Note: It is important to ensure that the distance between the proximal Schanz screw and the fracture line is at least 1 cm and no more than 3 cm. There is a danger of damage to the radial nerve due to too proximal an insertion of the proximal Schanz screw.