Uremia can be dialysed for about 10-30 years. Uremia is the end stage of the development of chronic renal failure. Once entering the uremic phase, the detoxification and drainage capacity of the kidneys have been reduced very significantly, or even lost, and then the survival can only be maintained with the help of long-term hemodialysis, usually 3 times a week for 4 hours each time. However, hemodialysis also has its disadvantages, the toxins excreted by hemodialysis each time is only about 1/10 of the normal kidney. That is, most of the toxins still accumulate in the body and cause damage to the organs of the body, which will affect the survival life of the patient. Uremic dialysis patients can live about 10-30 years, but each patient is different and the dialysis center has different levels of dialysis, so there is some difference in the survival life span of patients. It is important to emphasize that hemodialysis is only one type of blood purification. Besides that, there are hemoperfusion, hemofiltration, etc. If a patient uses a combination of blood purification modality, such as hemodialysis, hemoperfusion and hemofiltration combined together, the removal of toxins will be more adequate and the survival time will be relatively longer.