The standard value of blood creatinine for the elderly is 53~106 μmol/L for adult men and 44~97 μmol/L for women, which may vary from hospital to hospital. In addition, when the elderly reach the age of 65, due to the physiological decline in renal function, the upper limit of blood creatinine is usually limited to 88.4μmol/L. The standard value of blood creatinine is very much related to the specific hospital, and the normal range may be different between different hospitals due to the possibility of different testing instruments as well as testing reagents. In general, the normal blood creatinine is 53~106μmol/L for men and 44~97μmol/L for women, and the upper limit of blood creatinine is usually limited to 88.4μmol/L for those who have reached the age of 65. Creatinine is a more commonly used indicator of renal function, which not only reflects the state of renal function, but also the degree of renal function damage. As age increases, the human body’s renal function will gradually decline, so the normal value of blood creatinine for the elderly will also gradually increase. Therefore, it is impossible to use blood creatinine value to reflect the renal function condition sensitively. In clinical practice, the creatinine clearance rate is often calculated by relevant formula, combined with the patient’s age, body weight, gender and other indicators to assess the renal function condition. If you find abnormal blood creatinine value in the elderly, it is recommended to go to the regular hospital for examination and treatment.