The nurse is evaluating a client's response to hemodialysis. Which laboratory values will indicate the dialysis was effective?

White blood cells (WBCs) increase from 5000 to 8000/mm3 (5 to 8 x 109/L).

Serum potassium level decreases from 5.4 to 4.6 mEq/L (5.4 to 4.6 mmol/L).

Hemoglobin increases from 10 to 12 g/dL (100 to 120 mmol/L).

Blood urea nitrogen (BUN) decreases from 110 to 90 mg/dL (39.3 to 32.1 mmol/L).