Adult 24 hours urine volume less than how much is oliguria

Generally speaking, if the adult 24-hour urine volume is less than 400 ml, it is called oliguria, which generally indicates that the patient's kidney function is problematic. This is mainly divided into pre-renal, renal or post-renal reasons. Generally speaking, the adult 24-hour urine volume should be maintained at least 500 ml to meet the normal physiological function of the patient. The urine volume is relatively small, which indicates that the metabolites in the body cannot be excreted in time. Low urine volume will cause metabolites to deposit in the body, which poses a greater harm to the patient's health. Therefore, it is recommended to go to the hospital for relevant examination and treatment in time.