This supplemental report is being submitted to provide additional information.Olympus medical systems corp.(omsc) could not investigate the device, because the device was not returned to omsc.Omsc reviewed the manufacturing history (dhr) of the device and confirmed no irregularity.Since the device was not returned, the exact cause was unknown; however, the following was supposed to be the cause.The brightness adjustment function control unit of the device was broken.The instruction manual of the subject device states the corresponding method in case of an abnormality.
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