A nurse is caring for a client who is in the oliguric phase of acute kidney injury. Which of the following actions should the nurse take?

A. Monitor intake and output hourly: During the oliguric phase of acute kidney injury (AKI), urine output decreases significantly, often to less than 400 mL per day. Hourly monitoring of intake and output is essential to assess fluid balance, prevent fluid overload, and detect early signs of worsening renal function or complications such as edema and hypertension. B. Provide a diet high in protein: In the oliguric phase, protein intake is usually restricted because impaired kidney function reduces the ability to excrete nitrogenous waste. Excess protein can exacerbate azotemia and increase BUN levels, so high-protein diets are generally avoided during this phase. C. Encourage the client to consume at least 2 L of fluid daily: Clients in the oliguric phase are at risk for fluid overload due to reduced urine output. Encouraging high fluid intake can worsen edema, pulmonary congestion, and hypertension, so fluid intake is carefully restricted based on the client’s output and clinical status. D. Provide ibuprofen for retroperitoneal discomfort: Nonsteroidal anti-inflammatory drugs (NSAIDs) like ibuprofen are nephrotoxic and can further impair kidney function. These medications should be avoided in AKI, as they can worsen renal perfusion and exacerbate injury.