This supplemental report is being submitted to provide additional information.The subject device was not returned to olympus medical systems corp.(omsc) for evaluation but returned to the service department of olympus south korea.Omsc confirmed the following information from the service department of olympus south korea.There was a brown part inside the light guide (lg) lens, and there were traces of fluid invasion.The fluid could have invaded through the surrounding of the lg lens, and omsc determined that there was a gap in the adhesive area around the lg lens.There were scratched on the lg lens which could have been attributed to physical stress.Omsc reviewed the manufacture history (dhr) of the subject device and confirmed no irregularity.The exact cause of the reported phenomenon could not be conclusively determined.However, based upon the past similar cases, there was the possibility that the reported phenomenon was attributed to the following causes.Physical stress.Chemical stress.Storage environment (direct sunlight, high temperature, high humidity, environment exposed to x-rays and ultraviolet rays, etc.).Ageing deterioration.
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