During fluid resuscitation for burn injuries, what is the expected urine output for an average adult?

• A. 5-10 mL per hour
• B. 30-50 mL per hour
• C. 100-150 mL per hour
• D. 200-300 mL per hour

Answer: (B)

In burn resuscitation, urine output is used as a direct, practical marker of adequate circulating volume and renal perfusion. The aim for adults is about 0.5 mL per kilogram per hour. For an average adult around 70 kg, that works out to roughly 35 mL per hour, which falls within a common target range of 30–50 mL per hour. So the expected urine output during resuscitation is about 30–50 mL per hour. This tells you fluids are effectively perfusing the kidneys without tipping into overload. If urine output stays consistently below this range, you’d reassess and likely increase fluid administration (while monitoring pressures and signs of overload); if it rises well above this range, you’d consider dialing fluids back to avoid edema.