目的建立山西省新生儿先天性甲状腺功能减低症筛查中促甲状腺素的切值。方法采取出生72h后足跟血,滴在规定滤纸片上,采用酶免疫荧光分析法测定血中TSH浓度。结果测定新生儿足跟血70 210例,确定山西省新生儿先天性甲状腺功能减低症筛查中促甲状腺素(TSH)的切值为9.05μIU/ml。结论新生儿促甲状腺素(TSH)切值的确定为山西省今后的新生儿疾病筛查提供依据。 Objective To establish the cut-off value of thyrotropin in the screening of neonatal congenital hypothyroidism in Shanxi Province. Methods The heel blood was taken after 72h, and then dripped on the filter paper. Enzyme immunofluorescence assay was used to determine the concentration of TSH in the blood. Results Totally 70 210 cases of neonatal heel hemangioma were determined, and the cut-off value of thyrotropin (TSH) in screening neonatal congenital hypothyroidism in Shanxi Province was 9.05μIU / ml. Conclusions The determination of thyroid-stimulating hormone (TSH) in neonates provides the basis for future screening of neonatal diseases in Shanxi Province.