The product was returned for investigation and the reported failure mode was confirmed.The failure mode will be monitored for future reoccurrence.The top snapped, it did not remove completely, but was attached by a large portion.In order to remove it she had to remove the trocar and the instruments because the way it was snapped could not be cleanly removed.Does not believe there was any patient harm.The failure(s) identified in the investigation is consistent with the complaint record.The probable root causes could be excessive force, or rotational force with the jaw under load.The device manufacture date is not known.(b)(4).
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