An important question that needs to be clarified for patients with renal failure is: is the damage to renal function acute or chronic? 1.Many acute kidney damage can be fully or partially relieved by effective treatment and can be removed from dialysis. 2, but chronic renal failure has completely sclerotic kidney structure, is unable to restore kidney function, must rely on long-term dialysis to replace the kidney function. According to our current technology, long-term maintenance of dialysis patients can also obtain a higher quality of life and a longer life expectancy.