先天性甲状腺机能低下症(克汀病),不仅使身体发育障碍,而且还能造成不可逆性的智力低下,带来很大的社会问题。若在生后能早期发现,早期治疗,则可取得显著疗效。然而当前只从临床症状去早期诊断是困难的,必须对新生儿进行激素水平的测定以查出异常儿,即强调全面普查的必要性。北美地区在1972年前后,欧洲国家从1975年前后,即以 T_4减少作为主要指标,开始了对克 Congenital hypothyroidism (cretinism), not only physical development disorders, but also can cause irreversible mental retardation, causing great social problems. If found early in life, early treatment, you can achieve significant results. However, it is difficult to diagnose early only from clinical symptoms. Hormone levels must be measured in newborns to detect abnormalities, which emphasize the necessity of a comprehensive census. Before and after North America around 1972, European countries started to reduce their T_4 as the main indicator before and after 1975,