Triiodothyronine (T3), Total
Order Name
T3 TOT
Test Number: 4502600
Revision Date 07/06/2020
Test Number: 4502600
Revision Date 07/06/2020
| Test Name | Methodology | LOINC Code |
|---|---|---|
|
Triiodothyronine (T3), Total
|
Chemiluminescence Assay | 3053-6 |
| SPECIMEN REQUIREMENTS | ||||
|---|---|---|---|---|
| Specimen | Specimen Volume (min) | Specimen Type | Specimen Container | Transport Environment |
| Preferred | 1 mL (0.5) | Serum | Clot Activator SST | Refrigerated |
| Alternate 1 | 1 mL (0.5) | Serum | Clot Activator (Red Top, No-Gel) | Refrigerated |
| Alternate 2 | 1 mL (0.5) | Plasma | Lithium Heparin PST (Light Green Top) | Refrigerated |
| Instructions | Stability: Ambient 1 day. Refrigerated 6 days. Frozen > 6 days | |||
| GENERAL INFORMATION | |
|---|---|
| Testing Schedule | Mon - Fri |
| Expected TAT | 1-3 days |
| Clinical Use | Useful clinically as a second level test in follow-up to low thyroid stimulating hormone values in the evaluation of patients suspected of having hyperthyroidism caused by excess triiodothyronine (T3). |
| Notes | 7/6/2020 The T3 Total unit of measure has been changed from ng/mL to ng/dL. |
| CPT Code(s) | 84480 |
| Lab Section | Chemistry |