Home
HelpTEST ID THYPROF THYROID PROFILE (TSH reflex FREE T4)
Additional Codes
TSHREFLEXT4
Performing Laboratory
NRLS-Core Chemistry
Specimen Type
Plasma/Serum
Specimen Required
Container/Tube:
Preferred: Lithium Heparin (Mint)
Acceptable: Serum gel, Tiger top, Red top
Specimen Volume: 1.0 mL
Collection Instructions:
Plasma gel tubes should be centrifuged within 2 hours of collection. 4 hours is acceptable.
Serum gel tubes should be fully clotted and centrifuged within 2 hours of collection. 4 hours is acceptable.
Red-top tubes should be fully clotted, centrifuged and aliquoted within 2 hours of collection.4 hours is acceptable.
Specimen Minimum Volume
0.5 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| TSH Plasma/Serum | Refrigerated(preferred) | 7 days |
| Ambient | 18 hours | |
| Frozen | 90 days | |
| FT4 Plasma/Serum | Refrigerated(preferred) | 48 hours |
| Ambient | 8 hours | |
| Frozen | Indefinite |
*If specimen is greater than 48 hours old, order TSH test only.
Profile Information
| Reporting Name | Always Performed |
|---|---|
| TSH | Yes |
Reflex Testing
| Reporting Name | Always Performed |
|---|---|
| FREE T4 | No |
Reference Values
An interpretive report will be provided