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This supplemental report is being submitted to provide the results of the legal manufacturer's final investigation.New information was added to the following fields: h3, h4, h6.A review of the device history record found no deviations that could have caused or contributed to the reported issue.Based on the results of the investigation, the event concerning the burnt c-cover is likely to occur if a high-energy endotherapy accessory is used without sufficient distance from the distal end.The additional event of the missing bending rubber, we could not specify the root cause of this event.We could not obtain the answer on whether the user used a high-energy endo therapy accessory despite repeated requests.Therefore, we could not make a judgment.The event can be prevented by following the instructions for use (ifu) which state:.Operation manual_ preparation and inspection_ inspection of the endoscope inspect the external surface of the entire insertion section, including the bending section and the distal end for dents, bulges, swelling, scratches, peeling of coating, holes, sagging, transformation, bends, adhesion of foreign bodies, missing parts, protruding objects, or other irregularities.Operation manual_ using endo therapy accessories_ high-frequency cauterization.Treatment: warning: never emit high-frequency current before confirming that the distal end of the high-frequency endo therapy accessory is in the endoscope¿s field of view.Also, confirm that the electrode section and the mucous membrane in the vicinity of the target area are at an appropriate distance from the distal end of the endoscope.If the high-frequency current is emitted while the distal end of the endo therapy accessory is not visible or too close to the distal end of the endoscope, patient injury, bleeding, and/or perforation as well as equipment damage can result.*operation manual_ using endo therapy accessories_ argon plasma coagulation (apc) warning: make sure that the distal end of the apc probe always lies more than 10 mm from the endoscope¿s distal end.The protrusion by 10 mm or more can be identified when the first black ring on the apc probe¿s distal end is visible in the endoscopic image.Otherwise, the treated region cannot be irradiated correctly, and the endoscope may be damaged.*operation manual_ using endo therapy accessories_ laser cauterization warning: to avoid patient injury, burns, bleeding, perforation and/or damage to the endoscope, never emit laser radiation before confirming that an appropriate distance between the target and the endoscope¿s distal end is maintained and the tip of the laser probe is surely in the correct position in the endoscopic image.Caution: allow the tip of the laser probe to cool down before pulling it from the channel.If the laser probe is withdrawn while hot, channel damage may occur.Olympus will continue to monitor field performance for this device.
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