After biliary surgery resection, the bile duct has T-tube drainage, and the bile duct drainage is usually removed after 2-3 weeks. After bile duct drainage, the patient should be observed for fever, chills, jaundice, etc. If there is no any abdominal pain, jaundice, chills, or high fever by 12 days, the bile duct can be clamped. If the cholangiogram does not reveal any gallbladder or other problems such as residual stones in the bile duct, the bile duct can be removed on the 14th day. When pulling out, first of all, the fixation cord should be released, the fixation cord should be cut and disinfected, and after disinfection, it should be slowly pulled out, and after pulling out, it should be filled with gauze to stop bleeding. It must be observed whether there is any local bleeding, biliary peritonitis, and any secondary infection after extraction. However, in patients who have ERCP in internal medicine, because duodenal papillotomy is done, nasobiliary drainage will be placed, and the extraction time of nasobiliary drainage is usually 72 hours. If the blood and urine amylase is normal, there is no chills or hyperthermia, and the bile drainage is very clear, it can be removed directly and slowly.