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This supplemental report is being submitted to provide the results of the legal manufacturer's final investigation.A review of device history record and historical complaints analysis was conducted and no deviations that could have caused or contributed to the reported issue were identified.The device was returned to olympus for inspection, and the customer's complaint/reportable malfunction was confirmed.Based on the results of the investigation, it was observed that the device had misaligned angle.It is possible that the event was caused due to the occurrence of abnormality or damage of the image sensor unit, which led to the suggested event.As for the cause of the occurrence of abnormality, since the elongation of the angle wire has been confirmed, it was possible that the event occurred due to irregular loading on the bending section.However, we could not specify the event.The suggested event is detectable and preventable by handling the scope in accordance with the following sections of the instructions for use: "important information ¿ please read before use ¦warnings and cautions: caution turn the video system center on only when the endoscope connector is connected to the video system center.In particular, confirm that the video system center is off before connecting or disconnecting the endoscope connector.Failure to do so can result in equipment damage, including destruction of the image sensor.¦warnings and cautions: disappeared or frozen endoscopic image: warning follow the precautions given below.Otherwise, the endoscopic image may disappear unexpectedly, or the frozen image may not be restored during the examination.3.8 inspection of the endoscopic system ¦inspection of the endoscopic image confirm that the wli and nbi endoscopic images are normal.5.1 troubleshooting if any irregularity is observed during the inspection described in chapter 3, ¿preparation and inspection¿, do not use the endoscope and solve the problem as described in section 5.2, ¿troubleshooting guide¿.If the problem still cannot be resolved, send the endoscope to olympus for repair as described in section 5.4, ¿returning the endoscope for repair¿.Also, should any irregularity be observed while using the endoscope, stop using it immediately and withdraw the endoscope from the patient as described section 5.3, ¿withdrawal of the endoscope with an irregularity¿.Olympus will continue to monitor field performance for this device.
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