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This supplemental report is being submitted to provide the results of the final investigation.Updated fields: h2, h3, h4, h6, h7, h9, h11.A review of the device history record found no deviations that could have caused or contributed to the reported issue.The device was returned to olympus for inspection, and the reported failure was confirmed.The device evaluation found the operation pipe of the handle section was broken, the loop had been detached from the insertion portion, the loop was not returned, the insertion portion was severed near the handle section, and the severed areas revealed the shape that were cut mechanically using a tool.A root cause could not be identified.Based on the results of the investigation, the likely mechanism causing the reported event may be the following: 1) the sheath was bent near the handle.2) the operating wire could not move because sliding resistance between the sheath and the operating wire increased.3) the operating pipe deformed or broke because the slider was forcefully operated.4) due to above, the loop could not detach from the hook.Should additional relevant information become available, a supplemental report will be submitted.Olympus will continue to monitor field performance for this device.
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