A client with acute kidney injury (AKI) has a blood pressure of 76/55 mm Hg. The primary health care provider prescribed 1000 mL of normal saline to be infused over 1 hour to maintain perfusion. The client starts to develop shortness of breath. What is the nurse's priority action?

Choice A reason: Shortness of breath during rapid fluid resuscitation in a patient with acute kidney injury is a critical sign of fluid volume overload and impending pulmonary edema. Since the kidneys cannot effectively process and excrete the fluid, the nurse must immediately stop or slow the infusion to prevent further respiratory distress. Choice B reason: While calculating the mean arterial pressure (MAP) is important for assessing perfusion status in a hypotensive patient, it is not the priority when the patient is showing signs of acute respiratory distress. The immediate physical threat to the patient's airway and breathing takes precedence over performing hemodynamic calculations. Choice C reason: Taking the pulse is a necessary part of a physical assessment, but it does not treat the underlying cause of the patient's new-onset shortness of breath. The immediate priority is to cease the intervention (rapid fluid bolus) that is likely causing the acute physiological decompensation and fluid shift into the lungs. Choice D reason: A pulmonary artery catheter is an invasive hemodynamic monitoring tool. While it may eventually be used in a critical care setting to manage complex fluid status, it is not an appropriate or timely first response to an acute episode of shortness of breath during a fluid bolus.