Final answer:
The nurse should include restricting sodium intake in the plan of care for a school-age child in the oliguric phase of acute kidney injury (AKI) with a sodium level of 129 mEq/L.
Step-by-step explanation:
The nurse should include restricting sodium intake in the plan of care for a school-age child in the oliguric phase of acute kidney injury (AKI) with a sodium level of 129 mEq/L. In the oliguric phase of AKI, the kidneys are not able to effectively excrete sodium, which can lead to fluid retention and electrolyte imbalances. Restricting sodium intake helps to reduce the sodium load on the kidneys, promoting fluid balance and preventing further complications.