The investigation concludes that a lower than expected vitros crea result was obtained from a single patient sample tested on a vitros 5600 integrated system.The assignable cause of this event is unknown.There is no indication of a systemic reagent issue.The issue is isolated to a single slide.An instrument related issue cannot be ruled out as a contributing factor.Service actions were completed to replace the dispense blade, although, it could not be confirmed if the service actions were related to the lower than expected result.In addition, pre-analytical sample processing could not be ruled out as a contributing factor, as the customer is not adhering to the sample collection device manufacturer¿s recommendations for sample centrifugation.It is possible that cellular debris, due to poor sample preparation, was present in the affected samples, although this could not be confirmed.
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The customer obtained a non-reproducible, lower than expected vitros crea result from a single patient sample tested on a vitros 5600 integrated system.Patient result of <0.25 mg/dl versus the expected result of 1.84 mg/dl.Biased results of the direction and magnitude observed may lead to inappropriate physician action.The lower than expected result was reported outside the laboratory, however, the result was questioned by the physician.A corrected report was sent to the physician and there was no allegation of patient harm as a result of this event.(b)(4).
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