Review Question - QID 217027

A 36-year-old man is brought by paramedics to the emergency department after a motor vehicle accident in which his car rolled over multiple times. He is unable to recount details of the accident but reports nausea and tinnitus. He is otherwise healthy and takes no medications. The patient's temperature is 98.6°F (37.0°C), blood pressure is 105/70 mmHg, pulse is 110/min, and respirations are 14/min. His Glasgow coma scale is 14. On physical exam, the patient is found to have numerous superficial lacerations on the face and scalp, rhinorrhea, and ecchymoses around both eyes and inferior and posterior to both ears. The left tympanic membrane appears distended with red material behind it. A cranial nerve exam reveals facial droop and hearing loss on the left side. Which of the following is the most appropriate next step in management?