The normal value for estimating glomerular filtration rate is in the range of 80-120 ml/min. Estimating glomerular filtration rate is often used in clinical practice to assess the filtration function of the kidneys and is used to evaluate the detoxification function and drainage function of the kidneys. It has a normal value of 80-120 ml/min. If it is lower than 80 ml/min, the presence of renal failure is considered, which may be acute renal failure or chronic renal failure, and needs to be judged with the medical history and the size of both kidneys. Another indicator often used in clinical practice to evaluate renal function is creatinine, which is different from the estimated glomerular filtration rate. Creatinine and estimated glomerular filtration rate are different. An increase in creatinine indicates renal failure, while a decrease in estimated glomerular filtration rate indicates renal failure. When comparing the two, the estimated glomerular filtration rate is more accurate because creatinine is easily affected by the patient’s age and weight, while the estimated glomerular filtration rate is determined by combining the patient’s age, weight and blood creatinine value, so it is relatively more accurate.