Oliguria is the medical term used to define the decreased amount of urine, also called urinary output.
Oliguria is diagnosed when the urine volume is less than 400 ml in one day or 30 ml in one hour, considering that the average for a healthy adult is 800 ml of urine per day.
The main causes of oliguria are decreased renal flow or low blood pressure. Oliguria can also be caused by dehydration or other physiological changes.
A decrease in the amount of urine may indicate some health problems such as dehydration, impaired kidney function, urinary duct obstruction. It can also be a symptom of nephrotic syndrome, which happens when there is excess elimination of proteins through the urine.
Oliguria must be treated by nephrology, which is the medical field that takes care of kidney and urinary diseases. A urologist can also diagnose oliguria.
Learn more about the meaning of nephrology and Urologist.
Oliguria can also happen to children. Pediatrics considers the diagnosis when it is verified that the urine is below 0.5 ml per hour and per kilo, depending on the child's weight.
There are other urinary problems: anuria, polyuria, dysuria and nocturia. THE anuria is the total absence of urine or less than 100 ml per day and the polyuria is the amount of excess urine, above 2.5 liters per day.
already the dysuria means feeling discomfort or pain when urinating and nocturia it happens when the frequency of urination at night is greater than during the day.