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HelpTest Code LAB136 T3 (Triiodothyronine), Total
Performing Lab
Arnot Ogden Medical Center
Ordering Recommendations
Second-order testing for hyperthyroidism in patients with low thyroid-stimulating hormone values and normal thyroxine levels.
Diagnosing triiodothyronine (T3) toxicosis
This test is not useful for general screening of the population without clinical suspicion of hyperthyroidism.
Collect
Heparinized Plasma or Serum
Collection Device
Green or Gold Top Tube
Specimen Volume
5 mL
Stability (from collection to initiation)
| Room Temp | 8 Hours |
| Refrigerated | 48 Hours |
| Frozen | Indefinately |
Storage/Transport Temperature
Room Temp, Refrigerated, Frozen
Minimum Requirements
0.5 mL
Methodology
Chemiluminescence
Start Date
9/13/2017
Last Review Date
7/13/25 ES
Specimen Handling
Centrifuge within 2 hours of collection.
Remarks
TURN AROUND TIME
| STAT | 1 Hour |
| Routine | 8 Hours |