This is a pro­ce­dure that helps your GI physi­cian detect prob­lems of the bile and pan­cre­at­ic ducts. An inci­sion is made between the com­mon bile duct and the pan­cre­at­ic duct that allows the drainage of bile. A catheter and a wire are then used to remove gall­stones, block­ages or stent place­ment to help the drain the bile.