Ultrasonography of Normal Fetal Fourth Ventricle in the Second Trimester of Pregnancy
10.3969/j.issn.1005-5185.2017.04.014
- VernacularTitle:孕中期胎儿第四脑室正常值的产前超声诊断
- Author:
Guannan HE
;
Hong LUO
;
Jing ZHAO
;
Xianying XIAO
- Keywords:
Fourth ventricle;
Ultrasonography,Doppler,color;
Ultrasonography,prenatal;
Fetus;
Pregnancy trimester,second
- From:
Chinese Journal of Medical Imaging
2017;25(4):299-302
- CountryChina
- Language:Chinese
-
Abstract:
Purpose To characterize normal growth of the fetal fourth ventricle in the second trimester of pregnancy by standardized ultrasonography.Materials and Methods 516 cases of pregnant women with single fetus aged 18-27 weeks and 6 days were examined by conventional ultrasound.At the standard section of the fourth ventricle,the transverse dimension,anteroposterior dimension,circumference and area of the fourth ventricle were measured.Results The display rate of the fourth ventricles of fetuses aged 18-27 weeks and 6 days was up to 100％.There were no significant differences in the values of the fourth ventricles between fetuses with different gender (P＞0.05).The values of the fourth ventricle,including transverse dimension,anteroposterior dimension,circumference and area,increased linearly with the increase of gestational age,and there were positive correlations (r=0.374,0.378,0.387,0.379,P＜0.05).Conclusion The normal size of the fourth ventricle can be obtained by standardized measurement,which can be used as a reference for the clinical evaluation of the size of the fourth ventricle.
