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

T3 (Triiodothyronine) 1.8 ng/mL 0.8 - 2.0
• Sample Type : Serum.
• Method : ECLIA.
T4 (Thyroxine) 13.54 ug/dl 5.1 - 14.1
• Sample Type : Serum.
• Method : ECLIA.
ULTRA Thyroid Stimulating Hormone (TSH) 3.41 uIU/mL 0.27 - 4.2
Frist trimester: 0.3- 4.5
Second trimester : 0.5 -4.6
Third trimester : 0.8 -5.2
• 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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