Final answer:
The appropriate nursing intervention during the oliguric phase of acute kidney injury is to restrict fluids according to the previous day's fluid loss to manage the patient's fluid balance and prevent fluid overload or dehydration.
Step-by-step explanation:
When caring for a patient during the oliguric phase of acute kidney injury, an appropriate nursing intervention would be D. Restrict fluids according to the previous day's fluid loss. This phase of acute kidney injury is characterized by reduced urine output, making fluid balance critical. The goal is to prevent fluid overload which can increase the burden on the kidneys and exacerbate the injury, while also ensuring that the patient does not become dehydrated. Therefore, it's important to closely monitor the patient's fluid balance and adjust fluid intake accordingly. This may include measuring daily weight, tracking input and output thoroughly, and restricting fluid as needed based on the patient's individual fluid loss from the day before.
In contrast, weighing a patient three times weekly (option A) may not be frequently enough to accurately assess fluid balance in the acute setting, and increasing dietary sodium and potassium (option B) is typically avoided due to the risk of electrolyte imbalance. Providing a low-protein, high-carbohydrate diet (option C) is indeed a strategy to decrease the metabolic load on the kidneys, but during the oliguric phase, careful attention to fluid balance is more immediately critical.