This report is being supplemented to provide additional information based on the legal manufacturer's final investigation.A review of the device history record found no deviations that could have caused or contributed to the reported issue.Based on the results of the investigation, the reported mucosal tissue in the forceps was not confirmed during inspection and evaluation of the device, and a definitive root cause of the issue could not be determined, as there was no deformation observed that might result in the retention of tissue and no additional event or reprocessing information was reported or available, however, it is likely that the reported issue was the result of: a) while collecting mucosa multiple times during a procedure, the mucosa partially ran out from the cup of the forceps and got caught in biopsy channel or internal valve of biopsy port, and lodged there.When the forceps were inserted afterwards, the lodged mucosa adhered to the tip of the forceps and was visible in the scope image; or b) if mucosal tissue was collected from a previous case and comes out, it likely remained adhered in the forceps channel after reprocessing; when the forceps were inserted during the case, the tissue was visible in the endoscopic field of view.The issue may be detected/prevented by following the instructions for use which state: operation manual chapter 5 troubleshooting if any irregularity is observed during the inspection described in chapter 3, preparation and inspection, do not use the endoscope and solve the problem as described in section 5.2, troubleshooting guide.If the problem still cannot be resolved, send the endoscope to olympus for repair as described in section 5.4, returning the endoscope for repair.Also, should any irregularity be observed while using the endoscope, stop using it immediately and withdraw the endoscope from the patient as described in section 5.3, ¿withdrawal of the endoscope with an irregularity¿.Olympus will continue to monitor field performance for this device.
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