对１７１例围产期脑损伤性智力低下（ＭＲ）患儿甲襞微循环进行观察，结果显示：ＭＲ患儿甲襞微循环在形态、流态、综合积分值上均高于健康儿，Ｐ＜０．０１。甲襞微循环突出的改变是输入枝痉挛、血管袢数目显著减少、可见红细胞聚集。其中４８例患儿同时作了三维多普勒脑血管超声（ＴＣＤ）检查，结果有大脑前、中动脉痉挛，血流量减少者２７例，占５７％。提示围产期脑损伤性ＭＲ存在着慢性脑微循环障碍。 A total of 171 cases of perinatal brain damage in children with mental retardation (MR) were observed in the microcirculation of formazan. The results showed that the rate of formazan microcirculation in MR children was higher than that in healthy children in terms of morphology, fluid state and integrated score <0.01. A prominent change in the nailfold microcirculation is the input spasm, the number of vasculature significantly reduced, visible red blood cell aggregation. Forty-eight children underwent simultaneous three-dimensional Doppler ultrasound examination of cerebrovascular ultrasound (TCD). Results showed that there were 27 cases (57%) of anterior cerebral artery and middle cerebral artery spasm and decreased blood flow. Prompt perinatal brain injury MR there is a chronic cerebral microcirculation disorder.