The goal is to identify and treat life-threatening injuries simultaneously ( A: Airway & Cervical Spine Protection Assess for obstruction (blood, teeth, tongue). Maintain cervical spine immobilization. B: Breathing and Ventilation Check for tension pneumothorax or open chest wounds. Administer high-flow oxygen as needed. C: Circulation & Hemorrhage Control Apply direct pressure to external bleeding. Assess skin color, temperature, and pulse quality. D: Disability (Neurological Status) Glasgow Coma Scale (GCS) to evaluate consciousness. E: Exposure & Environmental Control Undress the patient fully to find hidden injuries. Keep the patient warm to prevent hypothermia ( StatPearls 3. Secondary Survey and Resuscitation