Anuria

Absence of urine production.

A condition in which the patient does not make urine, either because of a deficiency in the kidneys or because the urinary tract is blocked.

Inability to urinate, cessation of urine production and excretion. It can be caused by disease of the kidney and bladder or by serious decline of blood pressure. Untreated, it leads to uremia and death.

Absence of urine output or a quantity of 100 mL daily.

Serious kidney malfunction that results in little or no urine production. Failure to pass urine is an indication of a serious problem in the urinary tract. In patients with only one kidney, anuria is often caused by a stone. In patients with both kidneys, the condition may be caused by a tumor blocking the kidneys, kidney disease, or abnormally low blood pressure caused by shock. Treatment is urgent and depends on the cause of the condition. Dialysis may be used to rid the body of wastes temporarily.

Failure of the kidneys to produce urine. This can occur in a variety of conditions that produce a sustained drop in blood pressure. Urgent assessment is required to differentiate lack of production of urine from an obstruction to the flow of urine from the kidneys, which can readily be relieved. Anuria is associated with increasing uremia and may require hemodialysis.

Anuria refers to the complete cessation of urine output. While it can stem from severe kidney malfunction, a more common cause is the complete obstruction of urine flow due to factors such as prostate gland enlargement, bladder tumors, or the presence of bladder or kidney stones. In some cases, the failure of kidneys to produce urine may be attributed to oxygen depletion resulting from reduced blood flow, as seen in cases of shock, or to extensive kidney damage associated with conditions like glomerulonephritis.