The most important priority is the maintenance of an adequate airway, oxygen supply, breathing patterns, and circulatory status. Be prepared to assist with endotracheal intubation and mechanical ventilation by maintaining an intubation tray within immediate reach at all times. Maintain a working endotracheal suction at the bedside as well. If the patient is hemodynamically stable, position the patient for full lung expansion, usually in the semi-Fowler position with the arms elevated on pillows. If the cervical spine is at risk after an injury, maintain the body alignment and prevent flexion and extension by using a cervical collar or other strategy as dictated by trauma service protocol.