The subject device was inspected at (b)(4).(b)(4) checked the subject device and found the reported phenomena, also found that the foreign material on the forceps elevator was caused by insufficient cleaning and the insufficient reprocessed subject device might have been used to next patient.The exact cause of the reported event could not be conclusively determined at this time.If additional information is received, this report will be supplemented.
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This supplemental report is being submitted to provide additional information.Omsc reviewed the manufacturing history (dhr) of the subject device and confirmed no irregularity.Foreign material adhered to the forceps elevator it was confirmed that there was dirt on the light guide lens glue and the light guide lens, which might indicate the insufficient reprocessing.Therefore the causes were presumed as below: there was the possibility that the brushing method for the forceps elevator by the user differed from the brushing method for the forceps elevator recommended in the instruction manual.There was the possibility that the trainings for the facility staff that the device handling according to the instruction manual, the reprocessing when the device was returned after repair and/or the general reprocessing, were insufficient.Inside of the light guide lens was dirty it was considered that stress was applied to the distal end of the subject device because there was the dent on the c-cover.Therefore the causes were presumed as below: there was the possibility that physical stress made gap at the light guide lens glue, and dirt entered from the gap.There was the possibility that the components inside the light guide lens were corroded due to the moisture ingress into the subject device, consequently corrosion product was left as dirt.If additional information becomes available, this report will be supplemented.
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