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2.反映血循环中甲状腺激素浓度的试验: (1) 直接反映激素浓度的测定法: A.血清总T_4及T_3的测定:常用者有竞争性蛋白结合分析法(CPBA)及放射性免疫测定法(RIA)。其正常值TT_4为13.29±2.98μg％(天津医学院,1980)(CPBA)或7.6±1.3μg％(Larsen,1975)(RIA一般认为诊断甲亢,TT_4应高于正常值的2.5倍,TT_3高于正常4倍。故认为血TT_4>13μg％时有甲亢可疑,>20μg％时(在排除TBG影响下)可确诊甲亢。TT_3
2. To reflect the concentration of thyroid hormone in the blood circulation test: (1) directly reflect the determination of hormone concentration: A. Determination of total serum T_4 and T_3: commonly used by competitive protein binding assay (CPBA) and radioimmunoassay ( RIA). The normal TT_4 was 13.29 ± 2.98μg% (Tianjin Medical College, 1980) (CPBA) or 7.6 ± 1.3μg% (Larsen, 1975) (RIA is generally considered to diagnose hyperthyroidism, TT_4 should be 2.5 times higher than normal, TT_3 high At normal 4 times, so that the blood TT_4> 13μg% when there is hyperthyroidism suspicious,> 20μg% (excluding the influence of TBG) can be confirmed hyperthyroidism .TT_3