B超诊断羊水过少120例临床分析

目的分析B超诊断足月妊娠孕妇羊水过少对围产结局的影响。方法应用B超羊水最大深度法估测羊水量，并测定脐动脉收缩期最大流速（S）和舒张末期血流速（D）的比值（S／D）值，比较分析120例B超诊断羊水过少（观察组）和120例B超羊水正常的足月妊娠妇女（对照组）B超诊断羊水过少的符合率、分娩情况及新生儿预后。结果AFD在1．0～1．2cm时，与实际羊水过少符合率为100％；1．3～2．0cm时为80％；2．1～30cm时为58％；观察组择期剖宫产和急诊剖宫产率明显高于对照组（P〈0．01）；阴道分娩成功率低于对照组（P〈0．01）；胎儿宫内窘迫与羊水轻度混浊的发生明显高于对照组（P〈0．01）；新生儿轻度窒息发生率明显高于对照组（P〈0．01）；重度窒息率两组间差异无显著（P〉0．05）。结论加强对羊水过少的产前及产时监护，对重度羊水过少者不予试产，对试产的孕妇产程中出现异常及时行急诊剖宫产而不过度试产。对羊水过少．同时又合并其它高危因素着，应禁止试产．以剖宫产结束妊娠。

The clinical anlysis of 120 cases of oligohydramnios by ultrasonography

Objectiv To analyze the affects on perinatal period caused by oligohydramnios of full-term pregnancy with ultrasonography. Methods The amount of amniotic fluild was measured by estimating maxium depth of amniotic fluiid .Color Doppler was used to examine the systolic/diastolic ratio of the blood flow velocity in fetal umbilical arteries was measured to compare 120 cases which show oligohydramnios whith that of controls whose amount of amniotic fluid was normal. The oligohydramnios diagnosed by ultrasonography and actual oligohydramnios.The delivery and prognosis of newborns were observrd. Results The value of AFD between 1.0-1.2cm was regarded as 100%,1.3-2.0cm as 80%, and2.1-3.0cm as 58%.The rates of time-selecting abdominal delivery and emergent abdominal delivery were significantly higher than that of the controls （P〈0.01） .The successful rate of vaginal delivery was significantly lower than that of controls （ P〈0.01 ） .The incidence fetal distress in utero and mild opacity of amniotic fluid was significantly higher than of controls （P〈0.01） .The incidence of mild asphyxia of newborns was also significantly higher than that of controls （P〈0.01） .There was no difference of the incidence of severe neonatal asphyxia between the two groups .Conclusions Prenatal monitoring of oligohydramnios and during the childbirth should be strengthened. Tria of labor is not recommended for severe oligohydramnios.To those women who showed abnormal phenomenon during the trial of albor, emergent abdominad deliveries have to be done on time instead of trial of labor and to those who have oligohydramnios as well as high rish factors,trial of labor is forbidden and the pregnancy is ended with abdominal delivery.