胎儿脐血流阻力增加与臀位的关系探讨

Study of the Relationship between Breech Presentation and the Increasing of Fetal Umbilical Artery Blood Flow Resistance

探讨臀位形成的影响因素.方法:用多普勒超声检测394例单胎臀位和140例正常足月单胎妊娠的脐动脉血流速度波型,分别测定了两组脐动脉血流指标PI,RI及S/D值,并测量了两组新生儿出生体重,同时对208例臀位的临床资料进行分析.结果:臀位组的脐动脉搏动指数(PI)、阻力指数(RI)及收缩期最大血流速度与舒张末期血流速度的比值(S/D值)均明显高于正常对照组(P<001).结论:胎盘—胎儿循环阻力增加可能是臀位形成的原因之一.

To study the related factors in breech presentation, the umbilical blood velocity wave form of 234 pregnant patients which were divided into two groups was measured. 94 cases breech pregnency and 140 cases were full term pregnancy. PI, RI and S/D values were analysed. Results: The values of PI, RI and S/D are significantly higher in brech group than those in normal group( P <0 01), and the weight of the newborn is lower in breech group ( P <0 01). Conclusion : The increasing of placenta-fetal circulatory resistance maybe a factor in breech presentation.