The investigation determined that a non-reproducible, lower than expected amon result was obtained from a quality control fluid when using a vitros 5600 integrated system.The most likely assignable cause is an instrument issue related to incubator contamination.Following maintenance actions by an ortho field engineer, vitros amon within-lab precision and within-run precision were significantly improved.
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A customer reported a non-reproducible, lower than expected amon result obtained on a quality control fluid processed using a vitros 5600 integrated system.Amon result = 150.0 umol/l vs.Expected 199.2 umol/l.Biased results of the direction and magnitude observed may lead to inappropriate physician action, should they occur undetected on patient samples.The customer made no allegation that amon patient results were affected.There was no allegation of patient harm.(b)(4).
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