Make sure the proximal end of the nail is placed beneath the bony surface of the humeral head.
No protrusion of the nail may be tolerated. Confirm with appropriately oriented C-arm images that the nail is below the bone.
The nail illustrated has a transverse spiral blade. At the recommended depth, the spiral blade should lie between the middle and lower third of the humeral head. Depending upon the selected humeral nail, different preoperative planning is necessary for its locking devices.