Fetal external ear observation on standard sections and the best time of check-up
- VernacularTitle:超声观察胎儿外耳标准切面及观察时机
- Author:
Min YANG
;
Min ZHENG
;
Xiaoning GU
;
Dongmei LIU
- Publication Type:Journal Article
- Keywords:
Fetal external ear;
Ultrasonography,prenatal;
Standard section
- From:Chinese Journal of Medical Imaging Technology
2010;26(2):304-306
- CountryChina
- Language:Chinese
-
Abstract:
Objective To detect the fetal external ear observation on standard sections and the best time with ultrasonography. Methods Total 2212 normal fetuses 17-40 weeks of gestation were divided into six groups. Fetal ears were obtained on transverse-incline view at cervical vertebra level (section A) and mandible level (section B), on parasagittal view (section C) and coronal view (section D) at external ear level. Fetal ears were evaluated and analyzed statistically. Results Among 2212 normal fetuses, 3454 ears (78.07%), 1694 ears (38.29%), 3454 ears (78.07%) and 2304 ears (52.08%) were obtained on section A, B, C and D, respectively. The obtained-rate of fetal ears on section A was the same as section C at the same week of gestation, but was significant higher than that of section B and section D (P<0.05). The obtained-rate of fetal ears was statistical different between section B and section D at the groups of 25-40 weeks (P<0.01). The obtained-rate of fetal ears was negatively correlated with gestational age (P<0.01). Conclusion It is useful and easy to observe the fetal external ear with ultrasonography to detect fetal ear abnormalities. Section A and section C are recommended to be standard observation sections for fetal external ear. Section B and section D can be used as supplementary for section A and section C. The best time for fetal external ear observation with ultrasonography is 17-24+6 weeks gestation.
