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The subject device was returned to olympus¿s local distributor, but not returned to omsc.Therefore the exact cause of the reported event could not be conclusively determined at this time.We conducted a survey based on the reported event and the provided photo.From the provided photo, it was confirmed that the probe was broken off.The manufacturing record was reviewed and found no irregularities.It is possible to infer the cause from the results of past similar investigations, therefore it was determined that an investigation using equipment with similar structure or similar device is unnecessary.Based on the past similar cases, it was known that the event occurred due to any of the following possible causes.The probe was cracked when the user activated output contacting with metal or something hard object such as metal clips, stapler, or other instruments, besides the probe was broken off when the probe was subjected to a load.The tissue pad was damaged since the user continued to activate output without grasping tissue (including after the tissue already cut).Also, it was known that the probe was cracked when the user kept activating output of the device with the worn pad, which caused contacting between the probe and the non-insulated area of the grasping section, 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.
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