超声测量胎儿小脑横径的诊断价值

目的:超声测量不同孕周胎儿小脑横径,分析正常胎儿小脑横径与孕龄的关系,排除中枢神经发育畸形,并制定了正常生长参数值.方法:在获得丘脑平面后声束略向尾侧旋转,即可获得小脑横切面,此切面的标准切面要求同时显示清晰的小脑半球且左右对称,以及前方的透明隔腔.在此切面上测量小脑横径,观察其周围结构.结果:胎儿小脑横径测值表明随孕龄的增加而增长,因此,可作为估测胎龄的又一指标.同时小脑横径的检测可排除小脑发育不良,小脑蚓部缺失等先天性小脑发育畸形.结论:胎儿小脑横径增长速度恒定,与孕周呈正相关,因此,能很好的反应胎儿的生长发育情况；小脑发育不良可以单独出现,亦可合并其他中枢神经畸形,如小脑蚓部缺失(Dandy-walker畸形),小头畸形.除小脑形态异常外,还可发现颅后窝池消失；小脑紧贴颅后窝;第四脑室不能显示等中枢神经发育畸形,及时为临床提供依据,提高优生优育.

Diagnostic value of fetal cerebellar transverse diameter determined by ultrasound

Objective:To measure the fetal cerebellar transverse diameter of different gestational ages by ultrasound and to analyzes the relationship between normal fetal cerebellar transverse diameter and the gestational age for excluding malformations of central nervous system and formulating the normal growth parameters.Methods:After getting hypothalamus plane,the ultrasonic beam was rotated slightly to its tail side and the cerebellar cross-section could be obtained,in which the standard section also required to s...