Test Information:
T3 is mainly formed extrathyroidally, particularly in the liver, by enzymatic 5’‑deiodination of T4 (thyroxine). Accordingly, the T3 concentration in serum is more a reflection of the functional state of the peripheral tissue than the secretory performance of the thyroid gland. The determination of T3 is utilized in the diagnosis of T3 thyrotoxicosis, the detection of early stages of hyperthyroidism and for indicating a diagnosis of thyrotoxicosis factitia.
Specimen Container:
Gold Top SST Tube (with clot activator) or Red Top Tube (Plain) – USE PLASTIC TUBE
Specimen Type:
Serum
Required Volume:
2 mL
Patient Preparation:
No Patient Preparation
Notes:
N/A (Not Applicable)
Storage & Stability
(Before Processing)
- Storage: 2 to 8°C
Stability: 14 days - Storage: 20 to 25°C
Stability: 8 days - Storage: – 20°C
Stability: 1 year
Transport Temperature:
Ref (2˚C – 8˚C)
Test Category:
Routine
Test Schedule:
Daily
Results Availability:
Within 4 hours