Bile duct rupture is a complete break or partial defect in the damaged bile duct, or a bile leakage occurring with inflammation and fibrosis by vascular forceps only or by sutures, and finally causing bile duct stenosis or occlusion. Bile duct dissection is commonly seen as a scarring narrowing of the lumen of the bile duct due to bile duct injury, i.e., benign stenosis of the bile duct. What are the examination methods of bile duct dissection? 1, cholangiography X-ray examination is a common method of diagnosis of biliary tract diseases, but some patients in the ordinary X-ray film can not be clearly shown, which requires the use of medical contrast agent through certain methods and channels into the bile ducts, so that the contour of the cholangiography site and the image of the lesion can be clearly shown on the X-ray film, this method is cholangiography. 2, gallbladder ultrasonography gallbladder ultrasonography that is the use of ultrasound examination of the patient’s gallbladder, commonly used in the diagnosis of gallbladder and biliary tract disorders, can also be used for ultrasound-guided gallbladder puncture drainage can not be carried out abdominal surgery of acute cholecystitis. This is a medical examination program that patients often come into contact with when they visit the doctor. Intravenous cholecystography and cholangiography Intravenous cholangiography of the gallbladder and bile ducts through X-ray examination is an imaging method in which a contrast agent is injected into the gallbladder from a vein and secreted into the bile ducts through the liver to visualize the bile ducts, which can be used to understand the morphology and position of the bile ducts and abnormalities of the bile ducts. Gallbladder and biliary tract imaging with this method is often clearer than oral cholangiography. It is suitable for those whose gallbladder does not show up when taking oral cholangiography, those who have gastrointestinal diseases in which the contrast agent is not easy to enter the intestines or cannot be well absorbed in the intestines, and those who have had their gallbladders removed and need to know the condition of the bile ducts. However, this method is prone to allergic reactions, so allergy test must be done before the imaging. 4.Blood routine is the most general and basic blood test. The routine blood test usually takes peripheral blood, such as blood from fingertips and earlobes. After the blood cell analyzer, the computer reports the results, and this program has become a routine for examining patients. Blood consists of two major components, liquid and tangible cells, and the routine blood test examines the cellular portion of the blood. Blood has three types of cells with different functions – red blood cells (commonly known as erythrocytes), white blood cells (commonly known as leukocytes), and platelets. Diseases are determined by observing changes in numbers and morphological distribution. It is one of the common auxiliary tests used by doctors to diagnose a condition.