The nurse is caring for a patient in septic shock with a blood pressure of 105/60 mm Hg, heart rate 110 beats/min, respiratory rate 32 breaths/min, oxygen saturation (5p02) 95% on 45% supplemental oxygen via Venturi mask, and a temperature of 102 F. The physician orders stat administration of an antibiotic. Which additional physician order should the nurse complete first?