问题 单项选择题 B型题

对诊断低T3综合征最有意义的激素测定是()

A.TSH

B.rT3

C.TT3

D.FT3

答案

参考答案:B

解析:

本题考点:亚临床甲状腺功能异常和低T综合征的诊断。亚临床甲状腺功能异常患者不伴或伴有轻微的甲亢症状,主要依靠实验室检查结果诊断,血清TSH水平低于正常值下限,而其他甲状腺功能均正常,所以对诊断亚临床甲状腺功能异常最有意义的激素测定是TSH。低T综合征也称为甲状腺功能正常的病态综合征,指非甲状腺疾病原因引起的伴有低T的综合征,主要表现为血清TT、FT水平减低,血清rT增高,血清T、TSH水平正常,其中血清rT增高最有诊断意义,因此,对诊断低T综合征最有意义的激素测定是rT。

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