陈倩 泉 章夫 水上尚典 佐藤郁夫 (100034 北京医科大学第一医院妇产科) 陈倩；(日本自治医科大学产妇人科)泉 章夫 水上尚典 佐藤郁夫 中华围产医学杂志 1998 0 1 2


    关键词：脑动脉；血流速度；胎儿 期刊 zhwcyxzz 0 论 著 fur -->


    

【摘要】 目的 探讨正常双胎妊娠期间胎儿大脑中动脉搏动指数的变化；并与正常单胎进行比较。 方法 采用彩色多普勒超声对34例正常双胎及176例正常单胎胎儿从孕23周至孕35周进行大脑中动脉搏动指数测定。 结果 正常双胎胎儿大脑中动脉搏动指数随孕周呈逐渐下降趋势，与正常单胎胎儿比较，孕29周前该值为低，以后较之略高。 结论 孕29周后双胎胎儿大脑中动脉血流阻力比单胎其值为高。

    Comparison of Middle Cerebral Artery Pulsatility Index in Singleton and Twin Pregnancies Chen Qian,Akio Izumi,Hisanori Minakami,Ikuo Sato.First Teaching Hospital,Beijing Medical University,Beijing,100034

    【Abstract】 Objective (1)To study the change of fetal middle cerebral artery pulsatility index(PI_MCA ) in twin pregnancy;(2)To compare the singleton and twin pregnancies with regard of changes in PI_MCA over the course of the pregnancy. Methods Fetal middle cerebral artery flow velocity waveforms were measured in 34 cases of normal twin pregnancies and 176 cases of normal singleton pregnancies from 23～35 gestational weeks. Results PI_MCA in twin pregnancies exhibited a decrease trend toward the gestation.Before 29 weeks' gestation the PI_MCA in twin pregnancies was lower than that of the singleton pregnancies,and it was rather higher than that of the singleton pregnances after 29 weeks'gestation. Conclusions The vascular resistance in middle cerebral artery after 29 weeks of gestation was higher in twin pregnancies than that of the singleton pregnancies.

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