Lab

Thyroid Releasing Hormone

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Thyroid Releasing Hormone, Thyrotropin-Releasing Hormone, TRH

  • See Also
  1. Thyroid Function Test
  2. Thyroid Function Summary
  3. Triiodothyronine ( Free T3)
  4. Thyroxine (Free T4)
  5. Thyroid Stimulating Hormone (TSH)
  6. Free Thyroxine Index (Free T4 Index)
  7. Thyroxine Binding Globulin (TBG)
  8. Antithyroid Antibody
  9. Thyroxine Replacement
  10. Hypothyroidism
  11. Hyperthyroidism
  12. Hypothyroidism in Pregnancy
  13. Thyroid Dysfunction in Pregnancy
  • Measurement
  1. Measures responsiveness of pituitary to TRH
  • Protocol
  1. Administer TRH 500 ug
  2. Measure Thyroid Stimulating Hormone (TSH) at 30-60 min
  • Interpretation
  • TSH
  1. Normal Response
    1. TSH rises 2-4x baseline
  2. Hyperthyroidism
    1. Low TSH with suppressed response to TRH
  3. Hypothyroidism
    1. High TSH with exaggerated TRH response