The customer received questionable free thyroxine (ft4) results for three samples from one patient from the cobas e601 analyzer serial number (b)(4).Sample 1 initial result was 5.33 ng/dl and the result from the architect analyzer was 2.55 ng/dl.On (b)(6) 2014, sample 2 initial result was 5.96 ng/dl and the result from the architect analyzer was 2.71 ng/dl.On (b)(6) 2014, sample 3 initial result was 4.14 ng/dl and the result from the architect analyzer was 2.28 ng/dl.Information concerning which result was reported outside the laboratory was requested, but was not provided.The patient was not adversely affected.Sample 3 was submitted for further investigation.
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