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Thyroid Function Test (TFT)
Investigation Result Units Biological Reference Interval

T3 (Triiodothyronine) 2.34 ng/mL 0.8 - 2.0
• Sample Type : Serum.
• Method : ECLIA.
T4 (Thyroxine) 14.99 ug/dl 5.1 - 14.1
• Sample Type : Serum.
• Method : ECLIA.
ULTRA Thyroid Stimulating Hormone (TSH) <0.005 uIU/mL 0.270 - 4.20
• Sample Type : Serum.
• Method : ECLIA.

1) TSH levels are subject to circadian variation, reaching peak levels between 2 - 4.a.m. and at a minimum between 6-10 pm. The variation is of the order of 50% . hence time of the day has influence on the measured serum TSH concentrations. 2) Recommended test for T3 and T4 is unbound fraction or free levels as it is metabolically active. 3) Physiological rise in Total T3 / T4 levels is seen in pregnancy and in patients on steroid therapy. Clinical Use : • Primary Hypothyroidism • Hyperthyroidism • Hypothalamic – Pituitary hypothyroidism • Inappropriate TSH secretion • Nonthyroidal illness • Autoimmune thyroid disease • Pregnancy associated thyroid disorders. • References : - Henry’s Clinical Diagnosis and Management, 23rd edition. -Tietz Fundamentals of Clinical Chemistry and Molecular Diagnosis, 7th edition. •Disclaimer: 1) The above result relate only to the specimens received and tested in laboratory and should be always correlate with clinical findings and other laboratory markers. 2) Improper specimen collection, handling,storage and transportation may result in false negative/Positive results.

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