Urine output and hypovolemic shock: What is the target urine output for infants (babies)?

• A. 2 ml/kg/hr
• B. 1 ml/kg/hr
• C. 0.5 ml/kg/hr
• D. 3 ml/kg/hr

Answer: (A)

In hypovolemic shock, watching urine output helps gauge how well renal perfusion and overall circulation are being maintained. For infants, the target is about 2 mL/kg per hour. This higher rate reflects their greater relative need for renal perfusion to support glomerular filtration and fluid balance as they resuscitate.

Why this fits best: 2 mL/kg/hr provides a practical, age-appropriate goal that signals adequate perfusion without assuming fluid overload. It translates to roughly 10 mL/hour for a 5 kg infant, which aligns with maintaining kidney function during shock resuscitation.

Why the other options aren’t preferred here: 0.5 mL/kg/hr is a lower benchmark more typical of adults and would underrepresent an infant’s needs, risking undetected oliguria and worsening renal injury. 1 mL/kg/hr is a common pediatric target but is on the low side for infants, who usually require closer to 2 mL/kg/hr. 3 mL/kg/hr could push toward fluid overload in tiny patients and isn’t the standard target in infant resuscitation.

Remember to use urine output alongside other perfusion indicators (heart rate, cap refill, mental status, lactate) to guide fluid resuscitation.