Review Question - QID 109969

A 42-year-old homeless man presents to the emergency department. He was found unconscious at the park and was minimally responsive to police. He has a medical history of being found unconscious and brought in secondary to intoxication multiple times. His temperature is 99.0°F (37.2°C), blood pressure is 107/58 mmHg, pulse is 127/min, respirations are 5/min, and oxygen saturation is 90% on room air. The patient is given naloxone and his respiratory rate improves to 12/min; however, he is still minimally responsive. Physical exam demonstrates a man covered in vomit who smells like marijuana and alcohol. The patient withdraws his limbs to pain and mumbles incoherently. The patient's lipase is 5,789 U/L. He is started on IV fluids and basic labs and urine studies are ordered. A chest radiograph is ordered as seen in Figure A. The patient is admitted to the medical intensive care unit. His oxygenation in the intensive care unit is 78%. Which of the following represents optimal respiratory care for this patient (PEEP = positive end expiratory pressure)?