The nurse reviews clinical data for a client 24 hours postpartum following a vaginal delivery. Which of the following findings should the nurse immediately follow-up with?

D Urinary output 60 mL/hr [2.03 oz/hr] C Capillary blood glucose 258 mg/dL (14.29 mmol/L) [70-110 mg/dL, 4.0-11.0 mmol/L] B Blood Urea Nitrogen (BUN) 18 mg/dL (6.426 mmol/L) [10-20 mg/dL, 2.1-8.0 mmol/L] A White blood cell count 14,000 mm3 (14.0 x 10^9/L) [5,000-10,000 mm3, 3.5-10.5 x 10^9/L]