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This is a supplemental report to provide additional information.The subject device was returned to olympus medical systems corp.(omsc) for evaluation.On july 11, 2019, olympus medical systems corp.(omsc) found that the coating for electric insulation of the grasping section was partially missing.This is the report regarding the missing of the grasping section coating in addition to the failure of stopping bleeding.The probe was cracked at 20 mm from the distal end.There was a spark mark on the probe.The proximal side of the tissue pad was worn.There was a spark mark on the grasping section which had a worn pad.The manufacturing record was reviewed and found no irregularities.Based on the past similar cases, it was known that the tissue pad at the proximal side was damaged since the user activated output while the subject device was grasping a thick and hard tissue.It was also known that the proximal side of the grasping section and the probe came into contact since the tissue pad at the proximal side was damaged, consequently the probe cracked, and besides the reported error occurred.The device became unable to activate the output since the error did not reset.We presume that the failure of stopping bleeding occurred since the device became unable to activate the output.Based on the past similar cases, it was known that the coating for electric insulation of the grasping section was damaged when the user scraped tissue or coagulum on the grasping section with a sharp instrument.The above device handling has warned in the instruction manual as follows.*do not activate output while grasping thick, harder tissue, such as the uterine cervix, with the distal part of the probe tip and the grasping section.Otherwise, the grasping surface (white ptfe pad surface) may be worn out partially.Continued use under this condition may result in exposure of the metal area of the grasping section and a scratch on the probe tip.This could lead the probe tip to breaking and falling off into the body cavity during the output.*when tissue or coagulum build-up, on the grasping section or the probe tip, use a piece of moistened, soft gauze to clean the grasping section or probe tip.Do not attempt to scrape it with a sharp object such as a scalpel and tweezer.Otherwise, the grasping section, ptfe pad or probe tip may be scratched, which leads the probe tip to break and fall off into the body cavity during treatment.
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