A 35-year-old patient arrives in the emergency department with severe facial injuries from a motor vehicle accident. Upon examination, you notice misalignment of the jaw, inability to close the mouth properly, and bleeding from the mouth. What is the most appropriate course of action?
Provide intravenous pain medications to reduce discomfort
Assess and secure the airway, then control hemorrhage and immobilize the cervical spine if not already done
Immediately apply a mandibular splint to realign the jaw