A nurse is caring for a male client who reports nausea and vomiting and is receiving IV fluid therapy. The client's BUN is 32 mg/dl, creatinine 1.1 mg/dl, and hematocrit 50%. Which of the following actions should the nurse take?

A. Continue routine care because the results are within the expected reference range: The client’s BUN (32 mg/dL) and hematocrit (50%) are elevated, indicating possible dehydration. Continuing routine care without further assessment could overlook fluid imbalance and kidney stress. B. Evaluate urine output for amount and urine for specific gravity: Monitoring urine output and specific gravity helps assess kidney perfusion and hydration status. Elevated BUN and hematocrit suggest intravascular volume depletion, so assessing renal function and urine concentration is a critical next step to guide fluid therapy. C. Decrease the IV fluid infusion rate and limit oral fluid intake: Reducing fluids in a client showing signs of dehydration would worsen intravascular volume deficit. The client requires careful monitoring and likely continuation or adjustment of IV fluids to restore adequate hydration. D. Collect a urine specimen for culture and sensitivity: There is no indication of a urinary tract infection in the scenario. While urine testing is important in infection, it is not the priority action when signs point toward dehydration and volume depletion.