A nurse is reviewing the preadmission laboratory test results of a client who is scheduled for a carotid endarterectomy in 3 days. Which of the following results should the nurse report to the provider?

Rationale: A. Chloride 105 mEq/L is within the normal range (98–106 mEq/L) and does not require reporting. B. Calcium 9.6 mEq/L is a normal calcium level (normal range: 8.5–10.5 mEq/L). C. Sodium 151 mEq/L is above the normal sodium range (135–145 mEq/L) and indicates hypernatremia. This could affect neurological function and fluid balance, especially important to correct prior to surgery. D. Potassium 3.8 mEq/L is within the normal range (3.5–5.0 mEq/L).