Radioimmunoassay, Free Thyroxine
Clinical Chemistry · 21 CFR 862.1695
Recent MDR events
1,922 adverse event reports on file
- Elecsys FT4 IVJul 29, 2026OtherRoche Diagnostics1823260-2026-03088
- Elecsys FT4 IVJul 29, 2026OtherRoche Diagnostics1823260-2026-03087
- Elecsys FT4 IVJul 29, 2026OtherRoche Diagnostics1823260-2026-03094
- Elecsys FT4 IVJul 29, 2026OtherRoche Diagnostics1823260-2026-03093
- Alinity I Free T4 Reagent KitJul 27, 2026MalfunctionAbbott Ireland Diagnostics Division3005094123-2026-00364
- Alinity I Free T4 Reagent KitJul 22, 2026MalfunctionAbbott Ireland Diagnostics Division3005094123-2026-00356
- ALINITY I FREE T4 REAGENT KITJul 21, 2026MalfunctionAbbott Ireland Diagnostics Division3005094123-2026-00355
- ALINITY I FREE T4 REAGENT KITJul 21, 2026MalfunctionAbbott Ireland Diagnostics Division3005094123-2026-00357
- ARCHITECT FREE T4Jul 17, 2026MalfunctionAbbott Ireland Diagnostics Division3005094123-2026-00346
- ALINITY I FREE T4 REAGENT KITJul 13, 2026MalfunctionAbbott Ireland Diagnostics Division3005094123-2026-00337
Event type breakdown
Recalls
12 recall events for this product code
- Beckman Coulter Inc.TerminatedJun 2, 2020
Beckman Coulter Access Immunoassay Systems, Access Free T4 Thyroxine, REF 33880 (UDI:15099590225834) for use with Access Family of Immunoassay Systems including
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.
Z-2237-2020 · View FDA record ↗ - Siemens Healthcare Diagnostics, Inc.TerminatedMay 4, 2018
Dimension Free Thyroxine (FT4L) Flex reagent cartridge
The concentrations for biotin listed in the non-interfering substances section of the instructions for use for the Dimension TSHL, Dimension LOCI FT4L, Dimension Vista TSH, ADVIA Centaur Cyclosporine, and ADVIA Centaur DHEAS, incorrectly state the level at which biotin does not interfere.
Z-1669-2018 · View FDA record ↗ - Qualigen IncTerminatedDec 19, 2013
FastPack Free T4 Immunoassay
Qualigen initiated this recall because the FastPack kit may cause lower than expected results due to a manufacturing defect.
Z-0549-2014 · View FDA record ↗ - Beckman Coulter Inc.TerminatedApr 11, 2011
Access Free T4 Calibrator, Part Number: 33885, Lot Numbers: 014769
The recall was initiated because the stability claim for Access Free T4 calibrator lot 014769 is not met. The affected T4 calibrator lot can produce quality control and patient results that are erroneously low (by greater than 2 standard deviations). An erroneously low patient result may lead to misdiagnosis and/or delayed treatment.
Z-1945-2011 · View FDA record ↗ - Siemens Healthcare Diagnostics, Inc.TerminatedNov 24, 2010
The Dimension FT4L Flex reagent cartridge( Free Thyroxine) manufactured by Siemens Healthcare Diagnostics, Inc., Newark, DE.
Some LOCI cartridges have sub-optimal seal of the lidstock that can cause rupture of the package at high elevations, causing the cartridge to leak. Use of leaking cartridges may result in inaccurate test results.
Z-0458-2011 · View FDA record ↗ - Beckman Coulter Inc.TerminatedOct 1, 2010
Access Immunoassay Systems Free T4, Part Number: 33880
The recall was initiated after Beckman Coulter determined that kit boxes for Access Free T4 reagent (REF 33880), lot number 916293 may contain reagent packs labeled as Access Vitamin B12, (REF 33000), lot 916277. Using an Access Vitamin B12 reagent pack, lot 916277, filled with Access Free T4 reagents may generate incorrect patient results.
Z-2658-2010 · View FDA record ↗ - Abbott Laboratories HPD/ADDTerminatedAug 13, 2003
Free T4 Control Pack, list 9C03-10; the kit consists of 3 bottles of controls, L - 0.7, M - 1.2 and H - 3.0; Abbott Laboratories, Abbott Park, IL 60064
The Free T4 Controls, may yield control values that are high and outside of the package insert ranges.
Z-1130-03 · View FDA record ↗ - Abbott Laboratories HPD/ADDTerminatedAug 13, 2003
IMx Free T4 Reagent Kit, list 2222-20, 100 test kit; Abbott Laboratories, Abbott Park, IL 60064
The Free T4 Controls, may yield control values that are high and outside of the package insert ranges.
Z-1131-03 · View FDA record ↗ - Abbott Laboratories HPD/ADDTerminatedAug 13, 2003
Architect Free T4 Calibrator Kit, list 7G96-01; the kit consists of 2 bottles of calibrators, CAL 1 - 0.5 and CAL 2 - 6.0; Abbott Laboratories, Abbott Park, IL
The Free T4 Controls, may yield control values that are high and outside of the package insert ranges.
Z-1132-03 · View FDA record ↗ - Abbott Ireland Diagnostics DivisionTerminatedUnknown
Alinity i Free T4 Reagent Kit, List Number 07P7030
Abbott has become aware of a manufacturing issue that can result in damage to a bottle neck in some of the reagent cartridges found in the lots listed in Appendix A. If a bottle neck is damaged, it may cause a failure during the reagent loading process on the Alinity i instrument.
Z-0665-2019 · View FDA record ↗
Registered firms
74 firms currently registered for this product code
Abbott Gmbh
Wiesbaden Hesse, DE
Abbott Ireland Diagnostics Division
Longford, IE
Siemens Healthcare Diagnostics Products Limited
LLANBERIS Wales, GB
Siemens Healthcare Diagnostics Inc.
NEWARK, DE, US
Tosoh Aia, Inc.
TOYAMA, JP
Diasorin Deutschland Gmbh
Dietzenbach Hesse, DE
Mka Medikal Ic Ve Dis Ticaret Sanayi Limited Sirketi
Cankaya Ankara, TR
7051395 Canada Inc Dba Hta Direct Sourcing
Champlain, NY, US
Diamond Diagnostics Inc.
Budapest, HU
Diafarma Ecza Deposu Ve Medikal Dis Ticaret Dis Tic Ltd Sti
Istanbul, TR
Alius Scientific,llc
Carolina, PR, US
Ortho-clinical Diagnostics, Inc.
RARITAN, NJ, US
Tosoh Corp.
Chuo-ku Tokyo, JP
Beckman Coulter, Inc.
CHASKA, MN, US
Nanoentek Inc
Hwaseong Gyeonggi, KR
Abbott Laboratories
Lake Forest, IL, US
Siemens Healthcare Diagnostics Inc.
Tarrytown, NY, US
510(k) clearances
92 clearances for this product code
- Beckman Coulter, Inc.Mar 6, 2024
K240273 · Access Free T4
- Roche DiagnosticsApr 7, 2023
K220456 · Elecsys FT4 IV
- Shenzhen New Industries Biomedical Engineering Co., Ltd.Oct 4, 2018
K182423 · MAGLUMI 2000 FT4
- Roche DiagnosticsSep 18, 2018
K181233 · Elecsys FT4 III
- Abbott LaboratoriesOct 27, 2017
K173122 · Abbott Architect Free T4
- Nanoentek USA, Inc.Feb 17, 2016
K152422 · FREND Free T4 Test System
- Biomerieux S.A.Jun 8, 2015
K132058 · VIDAS FT4
- Siemens Healthcare Diagnostics, Inc.Nov 26, 2014
K140859 · DIMENSION VISTA FREE THYROXINE FLEX REAGENT CARTRIDGE, FT4, DIMENSION VISTA THYROID STIMULATING HORMONE FLEX REAGENT