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血中3,3’5’——三碘甲腺原氨酸(r_T_3)是近几年才认识的一种活性很低的甲状腺素代谢产物,是研究甲状腺激素代谢和甲状腺功能的一个有价值的指标。血液中r_T_3含量甚少,但对调节体内T_3、T_4的代射和维持适当的甲状腺激素水平有一定的作用。在不同的生理及病理状态下其含量显著不同。影响较大的因素是年龄。男女性别间血清r_T_3无明显差异。因此,测定血中的r_T_3水平在临床医学中有一定的意义。而迄今为止,少年儿童血清中r_T_3的正常值,尤其碘缺乏病(IDD)常规监测的7～14岁儿童r_T_3正常值报道甚少。为此,我们选择广西某非缺碘地区正常儿童静脉血测定r_T_3的含量,现将结果报告如下:
3,3’5 ’- triiodothyronine (r_T_3) in blood is a very low activity thyroxine metabolite that has been recognized in recent years and is a valuable study on thyroid hormone metabolism and thyroid function index of. Little blood r_T_3 content, but the regulation of T_3, T_4 in vivo and maintain proper thyroid hormone levels have a role. Under different physiological and pathological conditions its content is significantly different. The most influential factor is age. There was no significant difference between male and female sera r_T_3. Therefore, the determination of blood levels of r_T_3 in clinical medicine has a certain significance. So far, the r_T_3 normal value of juvenile serum r_T_3, especially iodine deficiency disorders (IDD) routine monitoring of children aged 7 to 14 r_T_3 normal value rarely reported. To this end, we choose a non-iodine-free areas of Guangxi normal children venous blood r_T_3 content, the results are reported as follows: