What is oliguria?
Oliguria (literally, scanty urine) is a reduction in urine volume to a volume that is insufficient to excrete the necessary solute load.
Oliguria is generally defined as a urine volume:
• Less than 0.5 mL/kg per hour in children
• Less than 20 mL/h in adults or
• Less than 400 to 500 mL/day in adults
Anuria (literally, the absence of urine) is defined as a urine output of <100 mL/day.
