A nurse is monitoring an older adult female client who had a myocardial infarction (MI) for the development of an acute kidney injury (AKI). Which of the following findings should the nurse identify as indicating an increased risk of AKI?

Choice A Reason: This is incorrect because preparing for mechanical ventilation is not the priority nursing intervention, as it is an invasive and potentially harmful procedure that should be reserved for clients who have severe respiratory failure and cannot maintain adequate oxygenation with noninvasive methods.

Choice B Reason: This is correct because administering oxygen via face mask is the priority nursing intervention, as it is a noninvasive and effective way to improve oxygenation and reduce hypoxemia in a client who has low PaO2 and SaO2. Oxygen therapy can also decrease the workload of the heart and lungs and prevent further complications.

Choice C Reason: This is incorrect because preparing to administer a sedative is not the priority nursing intervention, as it may worsen the client's respiratory status and mask the signs and symptoms of hypoxemia. Sedatives should be used with caution and only after oxygenation has been optimized.

Choice D Reason: This is incorrect because assessing for indications of pulmonary embolism is not the priority nursing intervention, as it is a diagnostic rather than a therapeutic action. Pulmonary embolism is a possible cause of the client's condition, but it does not address the immediate problem of hypoxemia.

Choice A Reason: Urine output is not a finding that should decrease with adequate fluid replacement. On the contrary, urine output should increase as the fluid therapy restores the renal perfusion and function. The nurse should monitor the urine output and ensure that it is at least 0.5 mL/kg/hr for adults and 1 mL/kg/hr for children.

Choice B Reason: Heart rate is a finding that should decrease with adequate fluid replacement. A high heart rate is a sign of hypovolemia, which occurs when the burn injury causes fluid loss from the intravascular space. The nurse should monitor the heart rate and expect it to decrease as the fluid therapy replenishes the blood volume and improves the cardiac output.

Choice C Reason: Weight is not a finding that should decrease with adequate fluid replacement. On the contrary, weight may increase as the fluid therapy restores the hydration status and corrects the fluid deficit. The nurse should monitor the weight and compare it with the pre-burn weight to evaluate the fluid balance.

Choice D Reason: Blood pressure is not a finding that should decrease with adequate fluid replacement. On the contrary, blood pressure may increase as the fluid therapy restores the vascular tone and improves the tissue perfusion. The nurse should monitor the blood pressure and expect it to increase as the fluid therapy compensates for the fluid loss.