Clinically 24 hours urine output less than 400ml is called oliguria, 24 hours urine output less than 100ml is called anuria.
The causes of oliguria and anuria can be pided into three categories:
1 Prerenal: such as heart failure, shock, severe hypoproteinemia, liver disease, severe dehydration. Mainly caused by insufficient renal perfusion decreased glomerular filtration.
2 Renal: the most common, such as acute nephritis, acute tubular necrosis, uremia, acute renal failure, lupus nephritis and so on. Mainly due to glomerular filtration and impaired renal tubular necrosis or swelling blocked, resulting in no urine.
3 Postrenal: such as bilateral kidney stones, bladder stones, bladder cancer, idiopathic retroperitoneal hyperplasia and so on. Strictly speaking, some of the causes of postrenal can not be said to be oliguria or anuria, such as bladder stones caused by urinary tract obstruction, can not urinate, not the kidneys does not produce urine, but urinary retention in the bladder, can not be excluded, mistakenly believe that the kidneys do not produce urine. Clogging too long, can also cause kidney damage, does not produce urine.
Oliguria, urinary persistence longer the worse the prognosis, and even irreversible damage can result.
If you have symptoms of oliguria, make sure to go to the hospital in time to check, if you have any questions about the kidney disease need to have a detailed understanding, you can consult our online experts, our experts will respond to you as soon as possible.