A client is admitted with acute kidney injury (AKI) and a urine amount of 2300 mL in 24 hours. The nurse should prioritize assessment of ________________.

Choice A reason: While cardiac and respiratory assessments are important in the oliguric phase of AKI to monitor for fluid overload, this patient is in the diuretic phase. The primary risk here is not fluid excess (leading to heart failure or pulmonary edema) but rather the systemic consequences of rapid volume depletion. Choice B reason: Mental health status is a component of holistic care and may be affected by uremia (causing encephalopathy). However, during the diuretic phase of AKI, physiological instability due to massive fluid loss takes clinical precedence over psychosocial assessments to ensure the patient's immediate physical safety and survival. Choice C reason: Edema is a hallmark of the oliguric phase where the kidneys fail to excrete water. In the diuretic phase, edema typically resolves as the patient voids large volumes. Assessing pain is standard, but neither edema nor pain represents the most acute physiological threat during this specific phase of renal recovery. Choice D reason: A urine output of 2300 mL indicates the diuretic phase of AKI, where the kidneys have regained the ability to excrete waste but cannot yet concentrate urine. This puts the patient at severe risk for hypovolemia, hypotension, and critical depletion of electrolytes like potassium and sodium, requiring intensive monitoring.