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This supplemental report is being submitted to provide additional information.The legal manufacturer reviewed the contents of this complaint.The legal manufacturer reported that since the actual product could not be confirmed 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, we confirmed that all balloons were inflated, so it is believed that the balloons could be inflated without problems during shipping.From the results of past surveys, it is speculated that when the balloon was inflated and quarrying, the rubber of the balloon was damaged at the corner of the stone and the balloon ruptured.However, it was not possible to determine when and what load was applied and the balloon was punctured.In addition, the legal manufacturer reported that after checking the contents of the instruction manual (drawing number gk7054, revision number 8), the following caution was issued regarding the description related to this event.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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