While examining the 82-year-old client's preoperative laboratory blood tests, the nurse finds the client's serum sodium level to be 139 mEq/mL. What is the nurse's best action?
A. Increase the IV flow rate.
B. Initiate oxygen therapy by mask.
C. Document the finding as the only action.
D. Notify the surgeon and anesthesiologist.
C
The normal range for serum sodium in clients of this age is 135 to 145 mEq/L.
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