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HelpTest Code T3 Total Triiodothyronine (Total T3)
Specimen Requirements
Specimen Type: Serum
Container/Tube: Gold Top (SSTII)
Volume: 5.0mL
Minimum Volume: 0.5mL serum
Collection Instructions: Allow specimen to clot for 30 minutes and centrifuge within 2 hours
Sample Stability
** Preferred temperatures for storage prior to and during shipping to NUH **
| Specimen Type: | Serum |
|---|---|
| Ambient: | Send the sample to the laboratory immediately. |
| Refrigerate: | 6 days |
| Frozen: | 1 year |
Reference Interval
| Age | Male | Female |
|---|---|---|
| 4 days - <1 yr | 1.30-3.60 nmol/L | |
| 1 - 11 yrs | 1.74-2.91 nmol/L | |
| 12 - 14 yrs | 1.50-2.71 nmol/L | |
| 15 - 16 yrs | 1.44-2.40 nmol/L | 1.42-2.18 nmol/L |
| 17 - 18 yrs | 1.38-2.58 nmol/L | 1.33-2.58 nmol/L |
| ≥19 yrs | 0.54-2.96 nmol/L | |
Days and Times Performed
24 hours, TAT 1 day
Methodology
Chemiluminescent Immunoassay
Service Code
31903
Update
Last updated 16/05/2024
Updated on Methodology.
Unacceptable Condition
| Haemolysis | NA |
|---|---|
| Icterus | NA |
| Lipaemic | NA |
| Others | NA |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Diagnosis of triiodothyronine toxicosis. Reflects tissue mono-deiodination of thyroxine.