HEMS vs GEMS. By ground or by air: which is the best way to take care of traumatized patients

Originally posted on MEDEST:
22 years old male hit from a car on the roadside of an urban area. The ground EMS ambulance (physician, nurse staffed), dispatched on scene, find the patient alert, oriented and spontaneously breathing. His vitals are: GCS 15 , RR 20, SaO2 95, HR 85, SBP 110 No mention of head…