Patients need to routinely undergo relevant blood tests before surgery, mainly including the following: i. Blood routine, which can understand whether there are abnormalities in the patient’s white blood cells, platelets, hemoglobin and other indicators. If the leukocyte index is significantly elevated, it indicates that the patient has infection in the body, and anti-infection treatment should be given before surgery. If the patient’s hemoglobin index is lower than normal, blood transfusion is needed to maintain the stability of vital signs if necessary. Second, liver and kidney function, electrolytes and other indicators, surgical treatment often requires anesthesia, preoperative assessment of the patient’s liver and kidney function is in a normal state. If the patient’s liver and kidney function indicators are abnormal, it is necessary to give liver protection, kidney protection and other supportive treatment, and it is safer to perform surgery after the indicators are corrected. Third, the pre-transfusion examination, including hepatitis B and half, syphilis, AIDS and other indicators of laboratory tests, if the patient is accompanied by infectious diseases, the materials needed during the surgical treatment need to be destroyed or disinfected separately to avoid causing serious nosocomial infections.