A client is receiving 3% of saline continues IV infusion for hyponatremia. Which assessment data will require the most rapid response by the nurse?

A. There are crackles audible throughout bilateral lung fields: Crackles throughout both lung fields indicate pulmonary edema, a life-threatening complication of rapid hypertonic saline infusion. 3% saline is highly osmotic, and excessive or rapid administration can cause fluid overload. Pulmonary edema requires immediate intervention and initiating oxygen therapy. B. The blood pressure increases from 120/80 to 142/94: A rise in blood pressure reflects a hemodynamic response to hypertonic saline, possibly due to increased intravascular volume. While this warrants monitoring, it is less immediately dangerous than pulmonary edema and does not require the same rapid intervention. C. There is slight sediment and blood in the client’s urine: Mild hematuria or sediment can indicate minor renal irritation or trauma, but it is not immediately life-threatening. It should be monitored, but it does not require the urgent response necessary for pulmonary complications. D. The client’s radial pulse is 105 beats/minute: Tachycardia may occur due to fluid shifts, anxiety, or early hypernatremia effects. While this is important to monitor, it is not as acutely dangerous as pulmonary edema and does not demand immediate intervention.