Have regard for posterior sternoclavicular dislocation. Although exceptionally rare, these are clinically relevant, since the medial clavicular head may compromise the airway or major vessels.
In which case:
• Abduct the arm to 90° and extend 10-15° and apply traction (with counter attraction to the torso from another colleague)
• Failed? Then maintain traction and pull the medial end of the clavicle forward with your fingers and thumb
• Still failed? Then prepare the skin with iodine and repeat with a towel clip [8].