A 30-year-old man is brought to the emergency department by his partner after multiple episodes of hematemesis. The patient is unresponsive and unable to provide a history. According to his partner, the patient had spent the evening at a bar where he consumed more than 10 shots of liquor. After leaving the bar, he vomited multiple times. There was bright-red blood mixed with the vomitus. While in the emergency department, the patient has two additional episodes of hematemesis. During the physical exam, the patient mumbles incoherently, is unable to follow commands, and tries to push away the examiner’s hands. Pupils are 3 centimeters bilaterally and reactive to light. Cardiac, pulmonary, and abdominal exams are non-contributory. Which of the following is the next best step in the management of this patient?