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, omsc assumed a potential cause as follows.The connecting tube was clogged with chemical residue because the user had not used the device for a while.The instruction manual of the device states the corresponding method in case of an abnormality.
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