Radioimmunoassay, Total Triiodothyronine（CDP）

T3 Reagent Packs used with Free T3 Calibrators may produce positively biased results for patient and quality control samples. The positive bias may cause erroneous patient results or a delay in testing that may impact patient management, clinical assessment, and the results of other thyroid function tests.

The reagent lot produces elevated results (approximately >30%) in some (15-20%)patient samples that do not correlate with the results of other thyroid markers nor Free T3 results generated on other platforms. This introduces a risk of the positive bias not being detected by QC with the potential that clinical correlation with other thyroid function tests will be inconsistent requiring additional testing; however the clinical assessment and treatment decisions are not made in isolation on a single test result especially, in the setting of thyroid function testing. False positive test results could lead to a euthyroid patient being interpreted clinically as having elevated thyroid function (hyperthyroid) or a hypothyroid patient being within the normal range. Such misdiagnoses may lead to inappropriate treatment of a euthyroid patient with anti-thyroid medications or hypothyroid patient not getting sufficient treatment since their free T3 test result demonstrates them to be in the euthyroid range.

The recalling firm characterized the potential interference effects of biotin (up to 1,200 ng/mL) on all biotin-mediated Access assays. The following six assays: Free T3-REF A13422, Total T3-REF 33830, Free T4-REF 33880, GI Mon-387687, Tg-REF 33860, and TgAbII-REF A32898 displayed significant interference (defined as a result bias greater than +/-10%) at 1,200 ng/mL of biotin.

The recalling firm characterized the potential interference effects of biotin (up to 1,200 ng/mL) on all biotin-mediated Access assays. The following six assays: Free T3-REF A13422, Total T3-REF 33830, Free T4-REF 33880, GI Mon-387687, Tg-REF 33860, and TgAbII-REF A32898 displayed significant interference (defined as a result bias greater than +/-10%) at 1,200 ng/mL of biotin.

Samples tested using ARCHITECT Free T3 or ARCHITECT Total T3 assays may show depressed results due to a reagent carryover when testing on board with specific assays on the ARCHITECT i1000SR and i2000/i2999SR platforms.

Samples tested using ARCHITECT Free T3 or ARCHITECT Total T3 assays may show depressed results due to a reagent carryover when testing on board with specific assays on the ARCHITECT i1000SR and i2000/i2999SR platforms.

Asfotase Alfa (Strensiq) interferes with certain Tosoh assays which potentially causes falsely increased or falsely decreased immunoassay test results, depending upon the assay.

Asfotase Alfa (Strensiq) interferes with certain Tosoh assays which potentially causes falsely increased or falsely decreased immunoassay test results, depending upon the assay.

Siemens has identified an issue when scanning the 20 barcode for the Master Curve Card (MCC) with ADVIA Centaur systems T3 kit lots ending in 198 on the ADVIA Centaur XPT system.

The Access immunoassays are susceptible to biotin interference.

Demonstrate an upward shift in patient results.

Beckman Coulter, Inc. is recalling Access Free T3 Reagent Kit because they were filled incorrectly and contain insufficient quantity of reagents in one or more of the pack wells.

The Immunodiagnostic Products Signal Reagent, Lot 3082 as the reagent packs may contain blank labels.

17% of ARCHITECT Total T3 Reagent Kit, LN 7K64-20/-25 reagent lots 38901UI00 and 38901UI01 may exhibit lower Relative Light Units (RLUs) than expected, which in turn may result in controls out of range or patient results higher than expected.

Siemens Healthcare Diagnostics confirmed customer complaints regarding an increase in the number of euthyroid patients (those with normal function of the thyroid) demonstrating values above the recommended normal range as published in the Instructions For Use for the IMMULITE/IMMULITE 1000 and/or IMMULITE 2000/IMMULITE 2000 XPi for several lots of Free T3 kits. A positive bias in quality control results was also observed, but the values may remain within the established ranges.

Siemens Healthcare Diagnostics confirmed customer complaints regarding an increase in the number of euthyroid patients (those with normal function of the thyroid) demonstrating values above the recommended normal range as published in the Instructions For Use for the IMMULITE/IMMULITE 1000 and/or IMMULITE 2000/IMMULITE 2000 XPi for several lots of Free T3 kits. A positive bias in quality control results was also observed, but the values may remain within the established ranges.

A recall was initiated because Beckman Coulter has identified a negative bias in test results when comparing elevated Total T3 patient samples diluted with Sample Diluent A to samples diluted with Access Total T3 Calibrator S0.