Review Question - QID 214774

A 56-year-old man with a history of alcohol use disorder, hepatitis C infection, and hepatocellular carcinoma status post orthotopic liver transplant is brought in by ambulance to the emergency department with several days of nausea, vomiting, and fevers reaching 104.0°F (40.0°C). The patient had been found with altered mental status at his assisted living facility. On exam, his temperature is 104.9°F (40.5°C), blood pressure is 60/35 mmHg, pulse is 130/min, and respirations are 18/min. The patient appears to be in acute distress and is diaphoretic. The patient is intermittently responsive but is not alert or oriented. He is pan-cultured and started on vasopressors and broad-spectrum antibiotics. He is admitted to the intensive care unit. The patient had already been admitted twice in the past 6 months due to septic shock. Which of the following should be obtained on admission for this patient?