T3 (Triiodothyronine) Antibody

T3 (Triiodothyronine) Antibody

Test Code

36574
83519
36574
83519
Not offered in Quest Diagnostics Nichols Institute (IFD) – San Juan Capistrano. Please provide SERVICE AREA INFORMATION to find available tests you can order.
In-home collection may be available in your area for purchase through Quest Mobile.

Clinical Significance

T3 (Triiodothyronine) Antibody - This test helps identify triiodothyronine (T3) thyroid hormone autoantibodies (THAAbs), which may interfere with T3 immunoassays in individuals with discordant serum T3 levels [1].

THAAbs may present in healthy individuals but are more common in patients with autoimmune thyroid diseases. THAAbs may affect both 1-step and 2-step immunoassays; the interference may be transient or persist for years. T3 THAAbs interfere with T3 measurements by competing with T3 antibodies used in the T3 immunoassays. When the serum T3 level is discordant with clinical manifestations or other test results (eg, ...

Test Resources

Clinical Focus

Thyroid Dysfunction in Nonpregnant Adults

Test Details

Methodology

Immunoassay (IA)

Assay Category

This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Reference Range(s)

Negative

Alternative Name(s)

Triiodothyronine,Anti-T3,T3 Autoantibody

LOINC® Codes, Performing Laboratory

Service Area must be determined

Methodology

Immunoassay (IA)
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Reference Range(s)

Negative

Alternative Name(s)

Triiodothyronine,Anti-T3,T3 Autoantibody
Service Area must be determined

Preferred Specimen(s)

1 mL serum

Minimum Volume

0.5 mL

Transport Container

Transport tube

Transport Temperature

Room temperature

Specimen Stability

  • Room temperature: 14 days
  • Refrigerated: 14 days
  • Frozen: 28 days

Reject Criteria

Gross hemolysis • Grossly lipemic • Plasma

Setup Schedule

Service Area must be determined
1 mL serum
0.5 mL
Transport tube
Room temperature
Room temperature: 14 days
Refrigerated: 14 days
Frozen: 28 days
Gross hemolysis • Grossly lipemic • Plasma
Service Area must be determined
Not offered in Quest Diagnostics Nichols Institute (IFD) – San Juan Capistrano. Please provide SERVICE AREA INFORMATION to find available tests you can order.
In-home collection may be available in your area for purchase through Quest Mobile.
Test Details

Clinical Significance

Test Resources

Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.

The CPT codes provided are based on AMA guidance and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.

This material contains content from LOINC® (http://loinc.org). The LOINC Table, LOINC Table Core are copyright © 1995-2019, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and is available at no cost under the license at http://loinc.org/license.

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