510(k) · Cleared
Recalled · Class II · 2019Access Free T4 Reagents on the Access Immunoassay Analyzer
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Beckman Instruments, Inc. · CEC Radioimmunoassay, Free Thyroxine
Cleared on Jul 14, 1998 after an 18-day review. The FDA summary names its predicate without a number. 1 later device descends from it. It has been recalled 4 times.
- Decided
- Jul 14, 1998
- Review
- 18 days
- Class
- Class II
- Product code
- CEC
- Recalls
- 4
- Predicates
- 0
1 later device descends from it, 1 citing it directly.
- This deviceK982250 Access Free T4 Reagents on the Access Immunoassay AnalyzerBeckman Instruments, Inc. · 1998
- Descendant · cites it directly · 0 of its ownK240273 Access Free T4Beckman Coulter, Inc. · 2024
Most influential descendants
Showing 1 of 1 · See all- K240273Access Free T4Beckman Coulter, Inc. · 2024 · cites it directly0descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| 0 (this device) | K982250 | Access Free T4 Reagents on the Access Immunoassay Analyzer | Beckman Instruments, Inc. | 1998 | — |
| +1 | K240273 | Access Free T4 | Beckman Coulter, Inc. | 2024 | — |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2024 | 1 | 0 |
Sources: FDA 510(k) database (decision fields), the FDA summary (predicates and indications), FDA recall and enforcement reports, and MAUDE; processed by 510(k) Report. Verify on FDA.gov · Methodology and accuracy.
Planning a device in CEC? A 510(k) Report weighs predicate choices, recall history and review times for a new device like this one.
Top candidate predicates for a new CEC device
- #1 K240273 Access Free T4score 7.0 · 1 generation · no Class I recall
- #2 Held for the reportin the report
What was it cleared against? (1)
Devices the submitter claimed this one is substantially equivalent to (*), and reference devices cited for a specific test or feature (†), as written in the FDA summary.
| Type | Number | Device | Decided |
|---|---|---|---|
| * | — | IMx® Free T4 Assay Named without a submission number |
What descends from it? (1)
1 later device cites it directly; ranked here by how many devices descend from each in turn.
| Number | Device | Decided | Descendants |
|---|---|---|---|
| K240273 | Access Free T4 | 2024 | 0 |
Has anything in its family been recalled? (0 Class I)
Recalls of this device
| Date | Class | Recall | Root cause | Reason |
|---|---|---|---|---|
| Apr 30, 2019 | Class II | Z-2237-2020 | Other | 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… |
| May 9, 2017 | Class II | Z-2637-2017 | Device Design | The Access immunoassays are susceptible to biotin interference. |
| Nov 11, 2010 | Not classified | Z-1945-2011 | Other | 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… |
| Mar 24, 2010 | Not classified | Z-2658-2010 | Other | 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… |
No ancestor or descendant has a Class I recall.
What does this lineage say?
- Of its descendants, K240273 (Beckman Coulter, Inc., 2024) has gone furthest, with 0 descendants of its own.
How does its category compare?
All CEC devicesCEC Radioimmunoassay, Free Thyroxine: FDA decisions, review times, recalls and adverse event reports over 20 years.
FDA decisions per year · CEC
1in 2024
2026 to Oct 25, outlined.
Median 510(k) review, days · CEC
238in 2014
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · CEC
1in 2018
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · CEC
213in 2025
MAUDE reports naming product code CEC, not matched to any one device; reports are not rates.
View these four charts as a table
| Year | Decisions | Median 510(k) review, days | Recalls (Class I) | MAUDE reports |
|---|---|---|---|---|
| 2007 | 1 | — | 0 | 0 |
| 2008 | 2 | — | 0 | 0 |
| 2009 | 1 | — | 0 | 2 |
| 2010 | 0 | — | 3 | 7 |
| 2011 | 0 | — | 0 | 15 |
| 2012 | 1 | — | 0 | 6 |
| 2013 | 2 | — | 1 | 6 |
| 2014 | 3 | 238 | 0 | 40 |
| 2015 | 1 | — | 0 | 166 |
| 2016 | 1 | — | 0 | 148 |
| 2017 | 1 | — | 0 | 196 |
| 2018 | 2 | — | 1 | 199 |
| 2019 | 0 | — | 0 | 167 |
| 2020 | 0 | — | 0 | 106 |
| 2021 | 0 | — | 0 | 96 |
| 2022 | 0 | — | 0 | 81 |
| 2023 | 1 | — | 0 | 99 |
| 2024 | 1 | — | 0 | 276 |
| 2025 | 0 | — | 0 | 213 |
| 2026 | 0 | — | 0 | — |
What is it indicated for?
The ACCESS® Free T4 Assay is a paramagnetic particle, chemiluminescent immunoassay for the quantitative determination of free thyroxine levels in human or plasma (heparin) using the ACCESS® Immunoassay System.
A free thyroxine test system is a device intended to measure free (not protein bound) thyroxine (thyroid hormone) in human serum or plasma (heparin). Levels of free thyroxine in plasma are tholight to reflect the amount of thyroxine hormone available to the cells and may therefore determine the clinical metabolic status of thyroxine. Measurements obtained by this device are used in the diagnosis and treatment of thyroid diseases.
Indications for use read by OCR from a scanned FDA summary, so letters may be misread. Check the PDF before quoting it.
https://510kreport.com/device/K982250 · printed Nov 6, 2026
Cite this page
510(k) Report. “K982250: Access Free T4 Reagents on the Access Immunoassay Analyzer.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K982250
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Record history
- FDA decision record loaded May 2, 2026
- Summary read Oct 13, 2026 (extraction version 9eaa42aa01ed)
- Lineage and recalls computed Nov 3, 2026
- Page last updated Nov 3, 2026