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(A) A circular ring was made with a nylon thread at the tip of the balloon to create a better grip. (B) This circular ring was grasped with a gripping forceps and inserted into the duodenal bulb. (C) The balloon was dilated with 60 to 70 mL of air. (D) The intragastric insufflation tube was clipped onto the gastric wall to prevent the insufflation tube from interfering with the lesion to be removed.
