At the scene of an injury, Emergency Medical Service professionals must identify the severity and type of injury, and determine which hospital or other facility would be the most appropriate to meet the needs of the patient. This is done through a process called “field triage.”

Guidelines for the Field Triage of Injured Patients from the Centers for Disease Control and Prevention, National Center for Injury Prevention and Control

The Brain Trauma Foundation Guidelines for Prehospital Management of Severe Traumatic Brain Injury