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. Provide ibuprofen for retroperitoneal discomfort.: Nonsteroidal anti-inflammatory drugs like ibuprofen inhibit prostaglandin synthesis, which is essential for maintaining renal vasodilation and perfusion. Administering nephrotoxic agents during the oliguric phase exacerbates renal parenchymal damage and further decreases the glomerular filtration rate. Pain management in kidney injury requires medications that do not compromise renal hemodynamics. B. Encourage the client to consume at least 2 L of fluid daily.: The oliguric phase is characterized by a significant reduction in urine output, typically < 400 mL per day, leading to fluid retention. Forced fluid intake during this stage increases the risk for systemic hypervolemia, pulmonary edema, and heart failure. Fluid restriction is usually mandated, calculated by adding insensible losses to the previous day's output. C. Monitor intake and output hourly: Precise monitoring of fluid balance is critical to assess the severity of renal dysfunction and the risk of fluid overload. Hourly tracking allows for immediate identification of further declines in renal output or response to diuretic therapy. This data guides the titration of fluid restrictions and the necessity for renal replacement therapy. D. Provide a diet high in protein.: Excess protein consumption increases the production of nitrogenous waste products like urea, which the failing kidneys cannot effectively excrete. High protein intake during the oliguric phase contributes to uremia and metabolic acidosis, worsening the clinical status. A protein-restricted diet is typically indicated to minimize the accumulation of toxic metabolic byproducts.