Biliary calculi may be removed from the common bile duct using a "stone basket" attached to a gastroscope in the procedure called:

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In the ERCP procedure, a gastroscope is advanced through the stomach, into the duodenum, and through the papilla of Vater into the common bile duct. When biliary calculi are present, they can be removed using a device called a "stone basket," which is attached to the gastroscope.

Biliary Calculi May Be Removed from the Common Bile Duct