The ABCDE mnemonic is commonly used in first aid training and medical education to guide the assessment and initial management of trauma patients. It stands for:
A - Airway, B - Breathing, C - Circulation, D - Disability (neurological status), E - Exposure/environmental control. The mnemonic provides a systematic framework to survey a patient and identify any life-threatening injuries while beginning resuscitation efforts. Variations on the mnemonic order and additions have been developed for different contexts and levels of training.