During an esophageal achalasia's postoperative inspection, the doctor tried to remove a suture thread using the subject device since he judged the suture thread used at the time of the operation could cause passage disorder.The suture thread was closely fixed to the mucous membrane, and the subject device got entangled.The scope was removed from the patient body after cutting of a part of the handle using pliers.After that the scope was inserted again, and the suture thread was cut using the spare (b)(4) device.Bleeding occurred in this occasion.
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