The Korean Journal of Gastroenterology :eISSN 2233-6869 / pISSN 1598-9992


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Fig. 3. Once in position across a non-relaxing lower esophageal sphincter, an overtube (A) allows the safe passage of a duodenoscope for an endoscopic retrograde cholangiopancreatography (B, C). A retained common bile duct stone (arrow) is then removed using a stone-extraction balloon (arrowheads outline the ends of the balloon) (D).
Korean J Gastroenterol 2023;82:190~193
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