A 74-year-old woman in the emergency department has a temperature of 38.6°C, heart rate 118/min, respiratory rate 28/min, blood pressure 88/54 mmHg and oxygen saturations 91% on air. She appears confused and has passed no urine for 10 hours. Sepsis is suspected. Which of the following is NOT part of the Sepsis Six bundle to be completed within one hour?