This report for non-fatal serious injury/device malfunction has been stored under the covid-19 pandemic in accordance with the guidance published by fda, postmarketing adverse event reporting for medical products and dietary supplements during a pandemic.The device was returned to olympus medical systems corp.(omsc) for evaluation.Device history record review indicates that the product was manufactured and tested in accordance with all applicable procedures and met all final product release criteria.Omsc confirmed the device, and could duplicate the user¿s report.Omsc confirmed the device, and found the brightness control mechanism of the device did not work.The exact cause was unknown.Omsc surmised that the reported phenomenon was occurred due to the brightness control mechanism of the device was broken by some cause.
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