The initial reporter stated they received discrepant thyroid test results for one patient sample tested on two cobas 8000 e 801 module analyzers, and a cobas e 411 immunoassay analyzer.The following assays were affected: elecsys ft3 iii, the elecsys tsh assay, and the elecsys tsh assay ver.2.The values measured at the customer site were reported outside of the laboratory to a physician.This medwatch will apply to the tsh assay.Please refer to the medwatch with patient identifier: (b)(6) for information related to the ft3 assay and refer to the medwatch with patient identifier (b)(6) for information related to tsh ver.2.The sample was initially tested on the customer's e 801 analyzer on 13-oct-2020.At the customer site, the sample was also treated with polyethylene glycol (peg) and repeated on the customer's e 801 analyzer.The tsh ver.2 assay was also repeated on the customer's e 801 analyzer after x2, x5, and x10 dilutions.The sample was repeated using the wako accuraseed and abbott architect methods.The sample was also provided for investigation, where it was tested for tsh, tsh ver.2, and ft3 on a second e 801 analyzer used for investigation.During investigations, the sample was also tested for ft3 on an e411 analyzer.The serial number of the customer's e 801 analyzer is (b)(6).The serial number of the e 801 analyzer used for investigation is (b)(6).Tsh reagent lot number: 454296, with an expiration date of may 2021 was used on this analyzer.
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