Appendicitis catheter inserted into the body is usually about 25cm, appendicitis catheter to drain the pelvic fluid, to prevent pelvic complications, pelvic abscess, etc., the specific length depends on the patient’s condition. The role of appendicitis catheter is to prevent excessive accumulation of fluid in the pelvic cavity, which may easily become infected and affect the prognosis, and also to observe the prognosis of the surgery and whether bleeding and other symptoms occur, so as to monitor whether there is any slow and delayed bleeding after the surgery as well as the amount of bleeding, and to carry out the surgery again for excessive bleeding, and to reduce the incidence of pelvic adhesion effectively. Appendicitis catheter placement requires the doctor to assess the patient’s overall physical condition, need to cooperate with the doctor for standardized treatment, individualized treatment, to avoid affecting the prognosis.