脐带绕颈胎儿MCA血流动力学指标的比较分析

目的　研究脐带绕颈胎儿的大脑中动脉血流动力学B超检测指标对预测胎儿宫内缺氧的临床价值。方法　用彩色多普勒超声检测 78例正常妊娠 (对照组 )和 33例脐带绕颈 (脐带绕颈组 )胎儿大脑中动脉(MCA)血液动力学指标。结果　根据胎儿MCA的Vs <4 3.0 ,Vd <11.0 ,S/D <4 .0 ,RI <0 .6 ,提示胎儿宫内缺氧。对照组有 8例宫内缺氧 ,占 10 .2 %。脐带绕颈组有 2 4例合并胎儿宫内缺氧 ,占 72 .7%。尤其是S/D ,RI均明显低于正常对照组 (P <0 .0 5 )。结论　产前B超检测对了解胎儿大脑血循环状况 ,及时预防胎儿宫内窘迫 ,具有实用价值

Comparative analysis of fetal MCA hemodynamics indexes in cases with cord around neck

Objective To investigate clinical value of fetal MCA hemodynamics with type B ultrasound apparatus in cases with cord around neck to predict intrauterine fetal anoxia. Methods Fetal MCA hemodynamics indexes were measured with colorful Doppler ultrasound apparatus in 78 healthy cases (control group) and 33 cases with cord around neck (cord around neck group).Results Intrauterine fetal anoxia was indicated according to Vs<43.0, Vd<11.0, S/D<4.0, RI<0.6 of fetal MCA. 8 cases (10.2%) in the control group were complicated with intrauterine fetal anoxia. 24 cases (72.7%) were complicated with intrauterine fetal anoxia in the cord around neck group, especially, whose S/D and RI were significantly lower than those in the control group ($P$<0.05).Conclusion Prenatal examination with type B ultrasound technique has practical value in understanding fetal brain blood circulation and preventing intrauterine fetal anoxia in time.