THYROID PANEL WITH TSH

This Thyroid test measures the blood level of Thyroid Stimulating Hormone (TSH) to evaluate thyroid function, which plays an important role in regulating weight, energy, body temperature, mood, and overall health.

If TSH levels are too high or too low, this may indicate that your thyroid is overactive (hyperthyroidism) or underactive (hypothyroidism). In either case, Free Thyroxine (T4) blood levels will be evaluated at no additional cost to help accurately diagnose a thyroid disorder (including hyperthyroidism and hypothyroidism).

"Preferred Specimen(s)
2 mL serum

Minimum Volume
1.2 mL

Transport Container
Serum Separator Tube (SST®)

Transport Temperature
Room temperature

Specimen Stability
Room temperature: 7 days 
Refrigerated: 7 days
Frozen: 28 days

Reject Criteria
Plasma

Setup Schedule"

Includes
Thyroid Panel: T3 Uptake, T4 (Thyroxine) Total, Free T4 Index (T7)
TSH

Patient Preparation
Specimen collection after fluorescein dye angiography should be delayed for at least 3 days. For patients on hemodialysis, specimen collection should be delayed for 2 weeks.
According to the assay manufacturer Siemens: "Samples containing fluorescein can produce falsely depressed values when tested with the Advia Centaur TSH3 Ultra assay."

Methodology
Immunoassay (IA)

Reference Range(s)
See individual tests