How long the elderly can live without urine is determined by the specific cause of the absence of urine. First, for example, urinary obstruction, the elderly have prostate hyperplasia or ureteral stones caused by anuria, this time as long as the timely surgical way to lift the obstruction, the urine can flow will not affect the patient’s life. Secondly, if the anuria is caused by acute renal failure, if the cause of acute renal failure is clarified in time, and the patient’s life span will be greatly prolonged after active treatment, even if the patient will not be affected. Thirdly, if the anuria is caused by uremia stage of chronic renal failure, if not treated in time, the patient may die in a short period of time, and some patients may even die within a month. However, if the patient undergoes dialysis treatment can prolong the life span, which can be maintained within about ten years.