Review Question - QID 204314

A 62-year-old man presents to the emergency department with worsening shortness of breath. Two days ago, he developed fever, rhinorrhea, and worsening of his chronic cough. His past medical history is significant for chronic obstructive pulmonary disease (COPD). His medications include ipratropium, but his prescription ran out a few days ago. He does not take supplemental oxygen at home. His temperature is 37.8 C (100.0 F), blood pressure 136/78 mm Hg, heart rate 98/min, respiratory rate 24/min, and oxygen saturation is 87 percent on room ...