Some patients with kidney function problems need dialysis, generally dialysis live several years without problems, usually can be maintained for 5-10 years. The specific survival length of dialysis is related to the original disease, for example, primary glomerulonephritis leading to uremia is relatively good. Such as diabetic nephropathy leading to uremia, because diabetes itself will have other complications, such as cardiovascular accidents are relatively common, or ANCA-associated small vessel vasculitis, because ANCA-associated small vessel vasculitis is a relatively rare and heavy clinical disease, according to the original disease, the survival period is not the same. Generally, dialysis is required when renal function has reached at least the uremic stage, or when creatinine has not reached 707 μmol/L, but severe edema, hyperkalemia, metabolic acidosis, etc. require early dialysis. There are also differences between the same disease, such as primary glomerulonephritis and chronic renal failure, and the survival period is also different. In addition, it is related to the patient’s compliance, for example, the medical prescription of peritoneal dialysis is 3 times a day, but the patient reduces the number of times, the dialysis is irregular, or hemodialysis needs 3 times a week, but the patient needs 2 times a week is not good compliance. There are also aspects of life, such as the inability to control dry weight and reduce water intake. Therefore, the length of survival on dialysis is due to many reasons and cannot be generalized.