oliguria
Decreased urine output below normal ranges for age, often indicating acute kidney injury or severe dehydration in pediatric patients.
Full Definition
Oliguria is defined as urine output less than 0.5-1.0 mL/kg/hour in children, representing a significant reduction from normal pediatric urine production. In neonates and infants, the threshold is typically 1 mL/kg/hour, while older children follow adult criteria of <0.5 mL/kg/hour. Oliguria may result from prerenal causes (dehydration, shock), intrinsic kidney disease (acute tubular necrosis, glomerulonephritis), or postrenal obstruction. Accurate measurement requires urinary catheterization or reliable collection methods, and prompt evaluation is essential to prevent progression to acute kidney injury.
Usage
Usage note: Always specify age-appropriate thresholds and ensure accurate urine output measurement methods.
In Context
- "Oliguria with urine output of 0.3 mL/kg/hour prompted immediate evaluation for acute kidney injury." — Critical care assessment
- "The development of oliguria following cardiac surgery raised concerns about prerenal acute kidney injury." — Postoperative monitoring