The initial reporter received a questionable elecsys ft4 iii assay result for one patient sample tested on the cobas e 801 analytical unit with serial number (b)(4).The initial result was not reported outside of the laboratory.The initial sample was rerun on the same instrument.It was also sent out to a laboratory which uses an abbott analyzer.The patient's treatment plan includes a plan for thyroid resistance if the roche result correlated with the abbott analyzer's result.A new sample was also obtained from the patient.On (b)(6) 2021 at 12:43 pm, the initial result was 2.020 ng/dl.The repeat result from the analyzer at an unknown time was 2.05 ng/dl.At 1:39 pm, the result from the new patient sample was 1.940 ng/dl.On (b)(6) 2021 at 4:24 pm, the repeat result from the abbott analyzer was 1.25 ng/dl.
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