Drainage tubes include latex tubes, silicone tubes, and tube-like things made of other materials. The purpose is to be placed in the abdominal cavity or at the incision or subcutaneous out, etc., to drain the exudate from the abdominal cavity, or from other parts of the body, including bleeding, through this tube to the outside of the abdominal cavity for easy observation by the doctor, and to facilitate the doctor’s observation of the condition of the abdominal cavity and the patient’s recovery after the surgery through daily doses. Routinely, no drainage tube is placed for minor surgery, but if the appendicitis exudates more, an abscess may form in the abdominal cavity and a drainage tube needs to be placed, and the amount of drainage tube is usually observed 2-3 days after surgery and can be removed after it is reduced. In case of major surgery, the purpose of placing a drain is to observe if there is bleeding in the abdominal cavity after surgery or if there is an anastomotic fistula related situation.