Final answer:
If a patient with severe facial trauma begins vomiting blood while being transported, turn the backboard onto its side, reassess breathing adequacy, and alert the hospital.
Step-by-step explanation:
If a patient with severe facial trauma begins vomiting large amounts of blood while being transported, the immediate action should be to turn the backboard onto its side. This will prevent the patient from aspirating blood or choking on it. By turning the backboard, the patient's airway will remain clear, reducing the risk of further complications.
After turning the backboard, the next step should be to reassess the patient's breathing adequacy. This will help determine if the patient's ability to breathe has been affected by the facial trauma or the presence of blood in the airway. If necessary, intervention such as suctioning or assisting with ventilation may be required.
Finally, it is important to alert the hospital of the situation. Providing a clear and concise report to the hospital will help them prepare necessary resources and personnel to address the patient's condition upon arrival.