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Thyroid Stimulating Hormone (TSH) Reflex

Mnemonic:    [TSH Reflex]
Name:    Thyroid Stimulating Hormone (TSH) Reflex
Specimen:    1 mL serum from a Red SST or Red top tube.
Spec Stability:    Stable 5 days refrigerated.
Reference Range:    see TSH Ranges
Note:    -If TSH > 4.0, a Free T4 will be automatically reflexed on this sample.

-If TSH < 0.4, a Free T4 and Free T3 will be automatically reflexed on this sample.