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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.The probe was broken off at 16 mm from the distal end.The broken fragment of the probe was not returned.The probe had a mark contacted with the grasping section.The fracture surface of the probe showed that crack developed.The proximal side of the tissue pad was worn.The grasping section had a mark contacted with the probe.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 probe was broken off when the probe was subjected to a load.The above device handling has warned in the instruction manual as follows.During the treatment, do not activate output while applying the probe tip to the tissue with a strong force, grasping thick tissue or twisting the handle.Also, do not activate the output, while torque is applied to tissue over the handle, in this instance release the torque, re-grasp the tissue and re-activate output.Otherwise, the probe tip and/or grasping section may be damaged, which may result in falling of the probe tip and/or tissue pad.Do not activate output while grasping hard tissue such as bone or highly calcified tissue, or hard objects such as metal clips, stapler, or other instruments (e.G., uterine manipulator, forceps, and others).Otherwise, it may cause the probe tip to be scratched or come into direct contact with the metal area of the grasping section as the heat generated by the friction between the hard object and the probe tip could cause wear/deforming/splitting/protruding/partial separating of the tissue pad.In turn, the probe may break before displaying an error window or generating an alarm tone.
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