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This supplemental report is being submitted to provide the results of the legal manufacturer's final investigation.Corrected fields: e1 (b)(6).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 reportable malfunction of no image was confirmed.Based on the results of the investigation, it is presumed that the image sensor unit had abnormality.The image sensor unit cable was broken by applying irregular stress to the bending section because the image problem occurred during angulation.However, a definitive root cause could not be determined.The following is included in the instruction for use (ifu): precaution: 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.Precautions for 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, nbi, and rdi 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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