Oliguria is defined as a urine output that is less than 400 mL/24 h or less than 17 mL/h in adults. Anuria

is defined as urine output that is less than 100 mL/24 h or 0 mL/12 h. Polyuria is a condition characterized that there is large volumes of urine (at least 3000 mL over 24 h).

What is the difference between polyuria and oliguria?

Oliguria: It is defined as reduced urine output below 400mL/day. Such urinary volume is insufficient to excrete the daily osmolar load. It occurs often in the clinical setting and may be caused by prerenal, renal, or postrenal renal failure. Polyuria: It is defined as increased volume of urine (>3 L of urine per day).

What is oliguria defined as?

Oliguria, defined as urine output <0.5 mL/kg per hour and observed within the first 12 hours following recognition of septic shock, was positively associated with the development of AKI (defined by a serum creatinine increment according to the Kidney Disease: Improving Global Outcomes [KDIGO] stage II criteria), need ...