A 70-year-old woman on the medical ward is reviewed with suspected sepsis from a urinary source. Her observations are: temperature 38.9°C, heart rate 120 beats/min, blood pressure 94/56 mmHg, respiratory rate 28/min, and oxygen saturation 92% on air. Blood tests are pending. You decide to start the Sepsis Six bundle. Which of the following actions is part of the Sepsis Six to be completed within 1 hour?