TG and hypothyroidism: Whole blood TSH levels of 57.3 and 66.9 mIU/L indicated hypothyroidism, and were corroborated by analysis of a  conventional blood sample taken on the same day which showed a serum TSH of 126 mIU/L (reference range  0.35-5.50 mIU/L), a serum free thyroxine (fT4) of  0.75 ng/dL (reference range 0.08-1.87 ng/dL), a serum free triiodothyronine (fT3) of 3.55 pg/mL, and a serum thyroglobulin (Tg) of  529.0 ng/mL.