Autoimmune Thyroid Stimulator, Long-acting Thyroid Stimulator (LATS)
Up to 72 hours
Chemiluminescent Immunoassay (CLIA)
<0.10 IU/L
Accredited NRL Laboratory
3 times per week (Mon-Wed-Fri)
TSI testing is primarily used to support the diagnosis of Graves’ disease, differentiate autoimmune hyperthyroidism from other causes, and monitor disease activity or recurrence.
Serum or Plasma
Minimum 0.3 mL
Serum (SST; Gold Top or Red Top) - Preferred Plasma (EDTA; Lavender top, Lithium Heparin; Green Top) - Acceptable
No special preparation is required for this test. You may eat, drink, and take your medications as normal, unless instructed otherwise by your healthcare provider.
This test does not require any special collection or pre-analytical handling. Follow routine specimen collection protocols
| Temperature | Period |
|---|---|
| Room Temperature | 24 hours at 20-25°C |
| Refrigerated | 7 days at 2-8°C |
| Frozen | 12 months at -20°C |