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The device is not returned, as such, the actual device evaluation cannot be done.Evaluation is performed by historical data.This supplemental report is being submitted to provide this information.The device history record review confirmed that device lot had passed all the event-related inspection items.The reported issue for this event is that the device popped when trying to inflate it during a patient procedure.Since the actual product is not returned and there were no abnormalities in the manufacturing records, the cause of the occurrence could not be identified.In the manufacturing process of this product, all balloons were inflated, the balloons could be inflated without problems at the time of shipping.From the results of past investigations, it is likely that when the balloon was inflated, the rubber of the balloon was damaged and the balloon ruptured.However, it was not possible to determine when and what load was applied and the balloon was punctured.The instructions for use includes the following statements: confirm that the balloon is completely deflated when inserting the instrument into the endoscope.If the balloon is not deflated completely, the distal end of the instrument may extend from the distal end of the endoscope abruptly.This could cause patient injury, such as perforation, bleeding, or mucous membrane damage, and could damage the endoscope and/or instrument.Do not force to insert the instrument if resistance to insertion is encountered.Reduce the angulation (or lower the forceps elevator if applicable) until the instrument passes smoothly.The use of excessive force causes patient injury, such as perforation, bleeding, or mucous membrane damage.It may also damage the endoscope and/or instrument.Do not advance or extend the instrument abruptly.This could cause patient injury, such as perforation, bleeding, or mucous membrane damage.It could also damage the endoscope and/or instrument.Insert the instrument into the endoscope slowly.Otherwise, the instrument and/or the endoscope may be damaged.
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