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Bile duct stones are typically removed using endoscopic retrograde cholangiopancreatography (ERCP), a minimally invasive procedure that combines x-ray and upper endoscopyâan exam of the upper gastrointestinal tract, consisting of the esophagus, stomach and duodenum (the first part of the small intestine)âusing an endoscope, which is a lighted, flexible tube, about the thickness of a finger.
Gall stones or biliary stones can pass from the gallbladder or liver, respectively, into the common bile duct and proceed into the small intestine depending on their size. As they pass through the biliary tree, these stones may cause obstructions if they are lodged in the bile duct.