婴儿猝死综合征(SIDS)是指病史中完全没有料到,死后检查也不能确定死因的婴儿突然死亡。SIDS的确诊,传统上尚需赖尸解排除任何可导致婴儿猝死的原因后方能确诊,而尸解又往往不能被家属接受。本文从SIDS尸解时采取血清,测定甲状腺激素时发现三碘甲腺原氨酸(简称T_3)改变,以企图对本综合征作一判断,并对T_3升高机制及其临床意义进行讨论。 Sudden Infant Death Syndrome (SIDS) is a sudden death in an infant whose medical history is completely unimportant and whose post-mortem examination does not confirm the cause of death. The diagnosis of SIDS, traditionally still need to rely on the autopsy to exclude any cause of sudden infant death can be diagnosed only after the autopsy and often can not be accepted by their families. This article from the SIDS to take serum when the autopsy, determination of thyroid hormones found triiodothyronine (T_3) changes in an attempt to make a judgment of this syndrome, and T 3 elevated mechanism and its clinical significance are discussed.