Review Question - QID 216286

A 52-year-old man presents to the emergency department for evaluation of shortness of breath. He is a prisoner at the county penitentiary and was transported via ambulance due to worsening dyspnea this evening. He states that he has had a persistent cough for the past several weeks, along with intermittent fevers and night sweats. His temperature is 101.5°F (38.6°C), blood pressure is 110/68 mmHg, pulse is 95/min, SpO2 is 92% on room air, and respirations are 28/min. On exam, he is cachectic with course crackles in all lung fields and is using accessory respiratory muscles. A chest radiograph is performed as shown in Figure A. Which of the following is the most appropriate next step in management?