Endoscopic retrograde cholangiopancreatography has created a great breakthrough in the management of biliary tract diseases, allowing direct intervention in the biliary tract for diagnosis as well as treatment, especially interventions. treatment such as removal of gallstones, worms of the common bile duct, stenting of the bile duct due to biliary obstruction... Endoscopic stenting for treatment of biliary obstruction due to stones is a minimally invasive procedure with high efficiency for patients.