Double balloon endoscopy was performed, to diagnose abdominal pain.After the endoscope reached the small intestine, the overtube became trapped in the small intestine, making insertion difficult.During removal of the overtube along with the endoscope, bleeding was observed, in the small intestine and esophagus.The patient was admitted for observation.The balloon of the overtube that was removed had moved to the distalend side and failed.There was only a small amount of air remaining in the balloon.
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