Which lab finding would be most concerning for AKI requiring dialysis?

• A. Hypokalemia
• B. Refractory acidosis
• C. Hypercalcemia
• D. Hypernatremia

Answer: (B)

The main concept here is that dialysis is urgently needed when the kidneys can no longer manage acid–base balance, causing severe metabolic acidosis that cannot be corrected with standard therapies. In AKI, failure to excrete hydrogen ions and to regenerate bicarbonate leads to a dangerous buildup of acid in the blood. If this acidosis is refractory—unresponsive to bicarbonate therapy and other measures—it signals a life-threatening imbalance that dialysis can rapidly correct by removing hydrogen ions and restoring pH. While potassium, calcium, and sodium abnormalities can occur with kidney injury, they do not by themselves indicate dialysis as clearly as refractory acidosis, which directly reflects the kidneys’ failing ability to regulate acid-base status.