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Test Name:
Thyroxine Antibody
- SBMF No:
45384 - Performance Lab Name:
Quest Diagnostics Nichols Institute - Test Mnemonic:
ANTI-T4 - ABN:
Not required - CPT Code:
83519 - LOINC Code:
19146-0 - Ref Lab Test No:
36576 - Also Known As:
T4 Antibody
Anti-T4
Anti-Thyroxine Antibody - Spec Type:
Serum - Spec Container:
Red top (serum) or gold top (SST) tube - Pref Vol:
1.0 mL - Min Vol:
0.5 mL - Fasting:
No - Spec Collect:
Routine venipuncture - Spec Process:
Clot 30 minutes
Promptly centrifuge 15 minutes
Immediately transfer serum to separate plastic tube - Spec Store Transport:
Refrigerated - Spec Stability:
14 days room temperature (20-30°C)
14 days refrigerated (2-8°C)
28 days frozen (-20°C) – Do not use frost-free units that undergo repeated freeze/thaw cycles - Spec Reject:
Plasma specimens
Severely hemolyzed or lipemic specimens - Methodology:
Radiobinding Assay - Clinical Significance:
Patients with autoimmune thyroid disease (ATD), including Hashimoto's thyroiditis and Grave's disease, occasionally develop autoantibodies to T4 and T3. These autoantibodies interfere with the measurement of T4 and T3 by immunoassay. Thus, abnormal or disparate T4 concentrations may be due to autoantibodies. - Reference Range:
Negative - Additional Test Info:
This test was developed and its performance characteristics have been determined by Quest Diagnostics Nichols Institute. Performance characteristics refer to the analytical performance of the test. - Day Run:
Sets up 1 day a week - Time Run:
AM - Time Reported:
Reports in 2 days
This is a sendout test. Please note that turnaround time is defined as the anticipated time from set up day to results release. - Test Type:
IMMUNOLOGY
