The investigation determined that a lower than expected vitros ft4 result was obtained from a non-vitros biorad l2 control fluid when processed on a vitros eciq immunodiagnostics system.The investigation was unable to determine a definitive assignable cause.Based on historical vitros ft4 reagent lot 3748 quality control results there is no indication a reagent related issue contributed to the event.However, as the customer did not provide qc results for the 3 days prior to the event, an issue with the vitros ft4 reagent lot cannot be completely ruled out as a contributing factor.Due to routine maintenance actions being performed on the system prior to successful precision testing, an instrument related issue cannot be entirely ruled out as contributing to the event.The assignable case of the event is unknown.
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The investigation has determined that a lower than expected vitros ft4 result was obtained from a single level of non-vitros biorad control processed on a vitros eciq immunodiagnostics system.Biorad l2 result of 2.0 ng/dl vs.An expected result of 5.27 ng/dl.Biased results of the direction and magnitude observed could lead to inappropriate physician action.There was no report of patient samples being affected and there was no report of patient harm as a result of this event.However, the investigation could not rule out that patient samples were not, or would not be affected if the event were to recur undetected.(b)(4).
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