What is the best indicator of adequate fluid resuscitation during the emergent phase of burn management?

What is the best indicator of adequate fluid resuscitation during the emergent phase of burn management?

• A. Urine output greater than 35 mL/hour
• B. Weight increase of 2 pounds in 24 hours
• C. Blood pressure of 90/60 mmHg
• D. Urinary output greater than fluid intake

Answer: (A)

Maintaining adequate perfusion is the key goal in the emergent phase of burn care, and urine output is the most direct real-time signal of that perfusion. When the kidneys are receiving enough blood flow, they produce urine at a steady rate; this helps confirm that circulating volume and tissue perfusion are on target. A typical target is about 0.5 mL per kilogram of body weight per hour, which for many adults translates to roughly 30–35 mL per hour. Seeing urine output above 35 mL/hour suggests the resuscitation plan is effectively restoring intravascular volume and renal perfusion.

Other signs can be misleading on their own. Blood pressure can be preserved with compensatory mechanisms or vasopressors even if tissue perfusion is not yet optimal. Weight gain reflects fluid shifts and edema rather than real perfusion status. Urine output exceeding fluid intake isn’t a standard measure of adequacy and doesn’t guarantee appropriate balance.