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HelpTest ID BLOD5008 TSH Reflex
Specimen Type/Requirements
Light Green top (Lithium Heparin w/gel) tube - Plasma (preferred)
Gold top (Serum w/gel) tube - Serum
Test is affected by moderate hemolysis and moderate lipemia.
Specimen Volume
| Preferred Volume | 1.0 mL |
|---|---|
| Minimum Volume | 0.5 mL |
Stability/Transport
| Room Temperature | 24 hours | |
|---|---|---|
| Refrigerated | 6 days | Preferred for transport |
| Frozen | 6 days |
Performed Test Frequency
Monday through Sunday
Additional Information
- If TSH is normal – no further testing.
- If TSH is high – FT4 will be done - no further testing.
- If TSH is low – FT4 will be done.
- If FT4 is elevated - no further testing.
- If FT4 is normal or low - a FT3 will be done.
Methodology
Chemiluminescence
Performing Lab
Sanford Laboratories Bismarck
CPT
84443