A nurse is preparing to provide care for a client in the emergency department who has syndrome of inappropriate antidiuretic hormone (SIADH). The client has a serum sodium of 115 mEq/L (136-145 mEq/L). Which of the following IV solutions should the nurse anticipate will be prescribed?

A. Dextrose 5% in 0.45% sodium chloride: This solution is hypotonic and could worsen the client's hyponatremia. It is not appropriate for treating SIADH-related low sodium levels. B. Dextrose 5% in 0.9% sodium chloride: This solution is isotonic but does not provide a sufficient increase in sodium levels for clients with severe hyponatremia. It’s not the ideal choice in this scenario. C. 0.9% sodium chloride: While this is an isotonic solution, it does not rapidly correct severe hyponatremia in SIADH. A more concentrated sodium solution is needed for this situation. D. 3% sodium chloride: This hypertonic saline solution is used to rapidly raise sodium levels in cases of severe hyponatremia, such as in SIADH. It helps correct the imbalance by providing a high concentration of sodium.