妊娠_____妊娠；_胎儿；_脐静脉；

妊娠前半期胎儿脐血流循环特点的研究

http://www.100md.com 《第四军医大学学报》 2003年第6期

妊娠,,妊娠；,胎儿；,脐静脉；,脐动脉；,超声检查，多普勒，彩色,0引言,1对象和方法,2结果,3讨论,【参考文献】

     (第四军医大学西京医院:妇产科，超声科，陕西西安 710033)

    Clinical study on the development of fetal umbilical blood flow in the first and early second trimesters

    YU YueCheng, XIN Xiao Yan, WANG XiLin, HUANG Kan, HAN ZengHui, YU Ming, CHEN DingZhang

    Department of Obstetrics & Gynecology, Department of Ultrasound, Xijing Hospital, Fourth Military Medical University, Xian 710033, China

    【Abstract】AIM: To investigate the development of fetal umbilical blood flow in the normal first and early second trimesters. METHODS: Umbilical artery and vein blood flow of 132 normal fetuses were analyzed with pulsed wave Doppler at 8 to 20 week gestations. P/M and umbilical artery flow diastolic expression (UADE) were observed. RESULTS: The spectra of umbilical venous flow was three or two phases before 10 week gestations and they all became two phases at 11 to 12 week gestations. With the pregnancy progress, the fluctuation of umbilical blood flow disappeared gradually. After 16 week gestations, spectra of all fetal umbilical vein blood flow showed stable conditions. From 8 to 16 week gestations, the maximal velocity of fetal umbilical vein blood flow increased twice and the beat index descended from 1.63±0.04 to 1.12±0.02 (P<0.01). The beat index was related to the pregnant weeks. CONCLUSION: The development fetal umbilical vein has an obvious phase characteristics. The stable spectra of umbilical venous flow after 16 week gestations suggests that the oxygenated blood into the fetus through umbilical vein is stable, which can be used to assess the fetal condition. ......

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