Radioimmunoassay, total triiodothyronine: medical device reports filed with FDA

1,979 reports carry this product code, 1997–2026; 3 brands with a page.

Read first · FDA's statement on these data

Adverse event reports submitted to FDA do not undergo extensive validation or verification. Therefore, a causal relationship cannot be established between product and reactions listed in a report. While a suspected relationship may exist, it is not medically validated and should not be the sole source of information for clinical decision making or other assumptions about the safety or efficacy of a product. Additionally, it is important to remember that adverse event reports represent a small percentage of total usage numbers of a product. Common products may have a higher number of adverse events due to the higher total number of people using the product. openFDA, FDA

FDA adds: "Although MDRs are a valuable source of information, this passive surveillance system has limitations, including the potential submission of incomplete, inaccurate, untimely, unverified, or biased data. In addition, the incidence or prevalence of an event cannot be determined from this reporting system alone due to potential under-reporting of events and lack of information about frequency of device use." And: "MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices."

Do not rely on openFDA to make decisions regarding medical care. While we make every effort to ensure that data is accurate, you should assume all results are unvalidated.

Not medical advice. This site counts what was reported to FDA. Questions about a medicine or device belong with a pharmacist or clinician.

1,979
reports with this product code: 0% of all MAUDE reports; 34
reports, 12 months to August 2026: 22 in the 12 months before; 98.8%
classified as malfunction: 62.3% across all reports; 0%
classified as death, as reported: 0.9% across all reports

Product code CDP is FDA's classification for "Radioimmunoassay, total triiodothyronine" (clinical Chemistry panel), a class 2 device. 1,979 medical device reports carry this product code, 0% of the MAUDE database, from July 1997 to July 2026.

34 reports arrived in the 12 months to August 2026, up 55% from 22 in the 12 months before. FDA releases MAUDE data monthly; reports can arrive months after an event, so the newest months grow in later releases. The event types recorded are malfunction (98.8%), injury (0.7%) and other (0.5%). 3 brand names with a page on this site carry this code; the brands table is ordered by report count for navigation only. FDA states that "MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices." It adds that the reporting system "has limitations, including the potential submission of incomplete, inaccurate, untimely, unverified, or biased data."

Brands with this product code

Brand	Reports	Classified as death	Classified as malfunction
Architect Free T3	291	0%	100%
Ft3 - Free Triiodothyronine	248	0%	100%
Architect Total T3	241	0%	100%

Ordered by report count for navigation only. FDA states that "MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices." It adds that the reporting system "has limitations, including the potential submission of incomplete, inaccurate, untimely, unverified, or biased data."

Manufacturers named

Manufacturer (as written on reports)	Reports	Share
Roche Diagnostics	1,182	59.7%
A I D D Longford	517	26.1%
Beckman Coulter	29	1.5%
Siemens Healthcare Diagnostics Products	11	0.6%
Siemens Healthcare Diagnostics - Glasgow	7	0.4%
Tosoh Hi-Tec	2	0.1%
Bayer	1	0.1%
Tosoh	1	0.1%

Reports by month, five years

FDA releases MAUDE data monthly; reports can arrive months after an event, so the newest months grow in later releases.

Event type and report source

Event type

Death0%0

Injury0.7%14

Malfunction98.8%1,955

Other0.5%10

Not given0%0

Who filed

Manufacturer report99.8%1,975

Voluntary report0.1%1

User facility report0%0

Distributor report0.2%3

Not given0%0

Grey bar: all 26,136,888 MAUDE reports.

Device problems coded

Device problem (FDA code)	Reports	Share
High test results	1,018	51.4%
Low test results	307	15.5%
Low readingsreadings were too low	298	15.1%
Incorrect or inadequate test results	263	13.3%
Non reproducible results	95	4.8%
Incorrect, inadequate or imprecise result or readings	93	4.7%
Nonstandard device	62	3.1%
Incorrect measurementthe device measured wrongly	14	0.7%
Device ingredient or reagent problem	9	0.5%
High readingsreadings were too high	6	0.3%
Insufficient device problem information	6	0.3%
Output problem	6	0.3%
Chemical problem	5	0.3%
Component missing	3	0.2%
Device operates differently than expectedthe device behaved unexpectedly	2	0.1%
False positive result	2	0.1%
Leak/splashthe device leaked	2	0.1%
Crackthe device cracked	1	0.1%
Device damaged prior to usethe device was damaged before use	1	0.1%
Device displays incorrect message	1	0.1%

Questions about radioimmunoassay, total triiodothyronine reports

What is product code CDP?

FDA's classification code for "Radioimmunoassay, total triiodothyronine", class 2, reviewed by the clinical Chemistry panel. Every device report carries the product code of the device involved.

How many reports carry this code?

1,979 reports through August 2026, 34 of them in the latest 12 months.

Which brands appear most often?

Architect Free T3 (291), Ft3 - Free Triiodothyronine (248) and Architect Total T3 (241). Widely used products collect more reports because more people use them.

Can the brands table be used to rank the devices?

No. FDA states that "MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices." It adds that the reporting system "has limitations, including the potential submission of incomplete, inaccurate, untimely, unverified, or biased data." Brands differ in how many are in use, how long they have been sold and how reports are collected.

Where this comes from. Counts are built from the openFDA Device Adverse Event (MAUDE) bulk export released 28 Sep 2026, which holds reports FDA received through 31 Aug 2026. Brand, generic and manufacturer names are as written on the reports; product code names come from FDA's device classification. No report narrative, lot number, patient detail or reporter identity is published. See the methodology and sources; FDA's record is authoritative, and corrections are handled within five working days.

Drug data (FAERS) through 30 Jun 2026; device data (MAUDE) through 31 Aug 2026. Not medical advice.