| 摘要 |
PURPOSE: A biliary tract stent for expanding the inner cavity including a backflow prevention unit is provided to supply the body of users to effectively drain bile from alimentary tracks to duodenum. CONSTITUTION: A biliary tract stent for expanding the inner cavity comprises the following: a cylinder stent(100) in a net shape inserted into the inner cavity of alimentary tracks, and formed with a form recognition wire; a cover member(200) preventing the breeding penetration of tumor cells on tissues of the digestive organs; and a backflow prevention unit(300) connected to the cover member and formed on the duodenum side terminal of the stent, for preventing the back flow of fluidified food from the papilla duodeni major portion. |
