Thyroid Stimulating Hormone
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Assay |
Thyroid Stimulating Hormone |
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Key Words |
TSH, TFT |
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Specimen Collection |
Serum (brown), Plasma (orange) |
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Turnaround time |
8hrs |
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Test Indications |
TSH is the frontline marker for assessing hypothalamic-pituitary-thyroid axis function. Elevated TSH is usually indicative of hypothyroidism, and low TSH concentrations are usually indicatiove of hyperthyroidism. |
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Limitations/Interferences |
No known common methodological interferences. |
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Reference Range |
(Non-Pregnant): • 6 days - 3 months: 0.72-11.0 mIU/L • 3 months - 1 year: 0.73 - 8.35 mIU/L • 1 year - 5 years: 0.70 - 5.97 mIU/L • 6 years - 10 years: 0.60 - 4.84 mIU/L • 11 years - 17 years: 0.51 - 4.30 mIU/L • ≥19 years: 0.30-4.20 mIU/L
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4.6% |
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58.5% |
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Minimum retesting interval |
Requests made within 30 days of a previous result on a patient are intervened |
