Renal failure can reflect the severity of renal function according to creatinine and glomerular filtration rate. Renal failure is divided into acute and chronic, and the stages of renal failure refer to the compensated, decompensated, renal failure and uremic stages of renal function. The compensatory stage refers to the glomerular function begins to decline, but is still in the compensatory state, generally refers to the glomerular filtration rate between 50-80ml/min; the decompensated stage refers to the glomerular filtration rate between 26-50ml/min; the uremic stage often refers to the glomerular filtration rate between 10-25ml/min; the last stage of uremia, often the glomerular filtration rate is less than 10ml/min. In recent years, the concept of chronic kidney disease stage I-V is basically used, which is also based on the glomerular filtration rate for staging. The normal glomerular filtration rate is about 90-120ml/min. Stage I refers to a normal state of kidney function, so basically ≥90 ml/min; stage II is between 60-90 ml/min; stage III refers to 30-60 ml/min; stage IV is 15-30; and stage V is <15 ml/min. Less than 15 ml/min corresponds to the uremic stage, in which case kidney replacement therapy, such as kidney transplantation, hemodialysis and abdominal dialysis, may be required, In this case, kidney replacement therapy, such as kidney transplantation, hemodialysis and abdominal dialysis, may be required to maintain kidney function.