The nurse is caring for a client with pre-renal acute kidney…

The nurse is caring for a client with pre-renal acute kidney injury (AKI) following major abdominal surgery. The client’s urine output over the past 2 hours is 50 mL, blood pressure is 90/58 mmHg, and heart rate is 114 beats per minute with sinus tachycardia. Which provider order is most important for the nurse to initiate first?