(b)(4).Investigation results: analysis of the returned rx cytology brush revealed that device was manipulated excessively.It was noted that the handle was separated from the device; the pull wire was broken adjacent to the handle cannula, and both ends of the broken portion of the pull wire were bent.Further evaluation noted that the catheter and wire were kinked in multiple locations throughout.The distal section of the device including the bristled portion of the brush was cut by the customer.Based on the condition of the returned device the most probable root cause classification for the reported failure is handling damage.A review of the device history record (dhr) was performed and no deviations were found.A search of the complaint database revealed that no other complaints exist for the specified lot.
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