Appendicitis patients undergo blood tests, mainly for routine blood tests, blood type, coagulation system, liver function, kidney function, blood glucose, blood biochemistry, and viral tests. The main purpose of the blood test is to observe the patient’s white blood cells and the number of neutrophils, platelets and hemoglobin. Because appendicitis patients will have significantly higher white blood cells and neutrophils. If the hemoglobin count is less than 90 g/L or the platelet count is less than 80 x 10^9 cells/L, it is a relative contraindication to surgery. Blood tests for liver function, kidney function, blood glucose, and blood biochemistry are taken to observe the patient’s liver and kidney function and whether there is a high blood glucose level. If the patient’s fasting blood glucose exceeds 8mmol/L or more, it may affect the wound healing. Blood tests for viruses are performed to observe whether the patient has infectious diseases such as hepatitis B, hepatitis C, syphilis and AIDS, and to determine whether special devices are needed according to different conditions.