经腹超声检测胎儿小脑蚓部及其临床意义

Value of transabdominal ultrusonography in detection of cerebellar vermis in fetus

目的 建立不同孕周正常胎儿小脑蚓部的正常值,并探讨其在评估小脑蚓部发育不全中的临床价值.方法 采用经腹超声测量111例20～40孕周正常胎儿小脑蚓部正中矢状面的前后径（AP）和顶尾径（CC）.按照上述测值对15例枕大池扩张的胎儿进行评估.结果 ①小脑蚓部AP、CC随孕周（GA）增加而增大（P＜O.05）,整个妊娠过程呈线性相关（AP=-5.406＋O.761 GA,r=0.97 CC=-5.795＋0.783GA,r=0.973） ②正中矢状断面小脑蚓部的测值和原裂、次裂、第四脑室顶部的声像图解剖特征有助于确认小脑蚓部发育畸形.结论 经腹超声是确认中晚期妊娠胎儿小脑蚓部发育异常的有效诊断方法.

Objective To detect the normal values of fetal cerebellar vermis using transabdominal ultrasonography and assess its clinical significance in the diagnosis of vermal hypoplasia（agenesis）. Methods A total of 111 fetuses were evaluated by transabdominal sonography between 20 and 40 weeks of gestation.The mid-sagittal antero-posterior（AP） and cranio-caudal（CC） vermian diameters were measured. A second group of 15 fetuses with cisterns magna were assessed and compared with the value of normal fetuses.0.05） and correlated linearly with gestational age （ AP = - 5.406 ＋ 0. 761 GA, r = 0.97 CC = - 5.795 ＋fissure, second fissure and fastigium may help identify developmental anomalies. Conclusions Transabdominal ultrasonography is a valuable tool in the study of fetal vermis during the second half of pregnancy.