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This report is being supplemented to provide additional information based on 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 was identified.It has been over 9 years since the subject device was manufactured.Based on the results of the investigation, a definitive root cause could not be established.The suggested phenomenon was presumed to have been due to the following stress to the insertion section: physical stress by rubbing/ hitting the insertion section, or the like chemical stress from reprocessing not recommended by ifu (reprocessing manual) stress from bad storage environment (in direct sunlight, at high temperatures, in high humidity or exposed to x-rays and/or ultraviolet-rays, etc.).It is suggested that the user facility review the method of handling for the device according to the instructions for use (ifu).The instructions for use (ifu) state the following regarding the suggested phenomenon: "3.2 inspection of the endoscope 5.Inspect the external surface of the entire insertion tube including the bending section and the distal end for dents, bulges, swelling, peeling, scratching, holes, sagging, transformation, bends, adhesion of foreign body, dropout of parts, any protruding objects or other irregularities." olympus will continue to monitor field performance for this device.
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