Review Question - QID 103018

A 73-year-old woman with a history of COPD and hypertension presents to the emergency room with altered mental status. Her husband reports that the patient was suffering from worsening fatigue and a productive cough over the last several days. Her temperature is 102°F (38.9°C), blood pressure is 155/95 mmHg, pulse is 99/min, respirations are 33/min, and oxygen saturation is 92% on room air. A chest radiograph is performed as seen in Figure A. The patient is given ceftriaxone, azithromycin, BiPAP, albuterol, ipratropium, and prednisone, and is admitted to the ICU. On day 1 in the ICU, laboratory studies are ordered as seen below.
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