Radioimmunoassay, Total Triiodothyronine

Reports per year

Source: FDA adverse event reports by year received, 2012–2026. Reporting paused during the 2026 MAUDE-to-AEMS transition and has since resumed.

Recent recalls

• 2024-05-14Open, ClassifiedUnder Investigation by firm

  VITROS Immunodiagnostic Products Free T3 Reagent Pack-IVD is for the quantitative measurement of free triiodothyronine (FT3) in human serum and plasma (EDTA or heparin). Product Code: 131 5589

  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.

• 2023-04-20Open, ClassifiedProcess design

  Beckman Coulter Access Free T3, Triiodothyronine, Free, Catalog #A13422, each box contains 2 reagent packs.

  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.

• 2020-06-02TerminatedOther

  Beckman Coulter Access Immunoassay Systems, Access Free T3 Triiodothyronine, REF A13422 (UDI: 15099590201661) for use with the Access Family of Immunoassay Systems including: Access 2, UniCel DxI 600, UniCel DxI 800, UniCel DxC 600i, UniCel DxC 660i, UniCel DxC 680i, UniCel DxC 860i, and UniCel DxC 880i systems.

  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.

• 2020-06-02TerminatedOther

  Beckman Coulter ACCESS Immunoassay Systems, Access Total T3 Triiodothyronine , REF 33830 (UDI: 15099590227210) for use with the Access Family of Immunoassay Systems including: Access 2, UniCel DxI 600, UniCel DxI 800, UniCel DxC 600i, UniCel DxC 660i, UniCel DxC 680i, UniCel DxC 860i, and UniCel DxC 880i systems.

  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.

• 2016-06-30TerminatedDevice Design

  Access Free T3 Assay, Ref No. A13422 The Access Free T3 assay is a paramagnetic particle, chemiluminescent immunoassay for the quantitative determination of free triiodothyronine levels in human serum and plasma using the Access Immunoassay Systems.

  Demonstrate an upward shift in patient results.

• 2015-10-07TerminatedUnder Investigation by firm

  Access Free T3 Reagent Kit, P/N A13422 The Access Free T3 assay is a paramagnetic particle, chemiluminescent immunoassay for the quantitative determination of free triiodothyronine levels in human serum and plasma using the Access Immunoassay Systems.

  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.

• 2015-06-04TerminatedError in labeling

  VITROS Immunodiagnostic Products Signal Reagent, Product Code 1072693, Unique Device Identifier No. 10758750008360 VITROS Immunodiagnostics Products Signal Reagent (SR) is supplied to users as a sales unit box containing two Signal Reagent Packs. Each Signal Reagent Pack is labeled with a barcode label. The label should include the name of the reagent, a barcode, lot information and expiry dating.

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

• 2014-12-03TerminatedEmployee error

  ARCHITECT Total T3 Reagent Kit (7K64) consists of: - 1 or 4 Bottle(s) (6.6 mL/27.0 mL) anti-T3 (sheep) coated microparticles in MES buffer with sheep IgG stabilizers. Minimum Concentration: 0.08% solids. Preservative: ProClin 300. - 1 or 4 Bottle(s) (5.9 mL/26.3 mL) T3 acridinium-labeled conjugate in citrate buffer with NaCl and Triton X-100 stabilizers. Minimum concentration: 0.33 ng/mL. Preservative: ProClin 300. The ARCHITECT Total T3 (TT3) assay is a chemiluminescent microparticle immunoassay (CMIA) for the quantitative determination of total triiodothyronine (Total T33) in human serum and plasma.

  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.

• 2014-01-30TerminatedNonconforming Material/Component

  T3F, Free T3 Assay, REF/Catalog Number LKF31, Siemens Material Number (SMN) 10381626; an IVD Immunoassay kit for use with the IMMULITE/IMMULITE 1000 Analyzers --- Shipping or unit package: 100, 200, 500 and 600 test kits --- Origin: UK Siemens Healthcare Diagnostics Products Ltd. Llanberis, Gwynedd, LL55 4EL UK. For the quantitative measurement of Free T3 in serum, as an aid in the clinical assessment of thyroid status.

  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.

• 2014-01-30TerminatedNonconforming Material/Component

  T3F, Free T3 Assay, REF/Catalog Number L2KF32 (200 tests), Siemens Material Number (SMN) 10381675, and REF/Catalog Number L2KF36 (600 Tests), SMN 10381682; an IVD Immunoassay kit for use with the IMMULITE 2000/IMMULITE 200 XPi Analyzers --- Origin: UK Siemens Healthcare Diagnostics Products Ltd. Llanberis, Gwynedd, LL55 4EL UK. For the quantitative measurement of Free T3 in serum, as an aid in the clinical assessment of thyroid status.

  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.