Laboratory assessment of Thyroid Status e Measurement of Thyroid hormones Tests to Determine The Etiology of Thyroid Dysfunction ● Thyroid Ultrasound Radioiodine uptake e Thyroid Scanning o fine-needle aspiration(fna) biopsy
Laboratory Assessment of Thyroid Status Measurement of Thyroid Hormones Tests to Determine The Etiology of Thyroid Dysfunction Thyroid Ultrasound Radioiodine Uptake Thyroid Scanning fine-needle aspiration (FNA) biopsy
Measurement of Thyroid Hormones ●TSH 3,114 ●FT3,FT
Measurement of Thyroid Hormones TSH: TT3 , TT4 FT3 , FT4
TSH marker of primary thyroid disease 1000 100 1.0 Normal TSH 0.1 。° 0.01 Undetectable values 0.40.8 2.0 2.42.8 3.2 3.64.0 FT4(ng/dL Hypo thyroid Euthyroid Hyperthyroid
TSH: marker of primary thyroid disease
exceptions pituitary diseases Euthyroid sick syndrome ● Medicines: e pregnancy
exceptions pituitary diseases Euthyroid sick syndrome Medicines: pregnancy
TT3 TT4/FT3 FT4 o The direct measurement of thyroid hormone ●FT3FT4↑: Thyrotoxicosis exceptions: thyroid hormone resistance (rarely) FT3 FT4\: hypothyroidism exceptions: sick euthyroid syndrome, medicines (common)
TT3 TT4/FT3 FT4 The direct measurement of thyroid hormone FT3 FT4 ↑ : Thyroitoxicosis exceptions: thyroid hormone resistance(rarely) FT3 FT4 ↓ : hypothyroidism exceptions: sick euthyroid syndrome, medicines (common)