A nurse is caring for a client following his first hemodialysis treatment. The client reports a headache, nausea, and restlessness. The nurse should identify these findings as manifestations of which of the following complications?

Choice A reason: During the oliguric phase of acute kidney injury, BUN and creatinine levels typically increase, not decrease, due to reduced kidney function.

Choice B reason: Renal function is not reestablished during the oliguric phase; this phase is characterized by decreased function.

Choice C reason: The oliguric phase is defined by significantly reduced urine output, often less than 400 mL per 24 hours.

Choice D reason: The GFR does not recover during the oliguric phase; it is usually decreased.

Choice A rationale: Cantaloupe is high in potassium. Clients with acute kidney injury (AKI) have impaired potassium excretion, and consuming high-potassium foods increases the risk of hyperkalemia, which can lead to cardiac arrhythmias.

Choice B rationale: Baked potatoes contain significant potassium, especially in the skin. In AKI, potassium retention is dangerous, so this choice reflects poor understanding of dietary restrictions for renal safety.

Choice C rationale: Yogurt is rich in potassium and phosphorus. In AKI, both electrolytes may accumulate due to reduced renal clearance, making yogurt an inappropriate choice without close monitoring.

Choice D rationale: Pecans are low in potassium, making them a safer snack for clients with AKI. Choosing low-potassium foods demonstrates appropriate understanding of renal dietary management.