摘要
目的联体双胎是一种罕见而复杂的胎儿畸形,存活率低且出生后胎儿预后不良,本研究分析联体双胎的超声图像特点,以提高超声诊断联体双胎的准确率。资料与方法回顾性分析经超声诊断并经引产及随访证实的11例联体双胎的超声资料,二维超声观察胎儿的数目、大小、联体部位、共用器官及合并其他畸形,彩色多普勒超声观察胎儿心血管及脐血流情况。结果 11例胎儿中,对称性联体双胎9例,其中胸腹部联体6例,超声示两胎儿胸腹前壁相连,共用心脏、肝脏或胃泡;2例双面畸形,超声示胎儿1个躯干、1个头颅及一双上下肢,颅内见2套脑室系统及2个面部;1例双头畸形,超声示胎儿具有1个躯干,一双上下肢及2个头颅及脊柱。非对称性联体(寄生胎)2例,超声示胎儿体内见颅骨、颅骨环、脊柱及肢体样骨骼强回声。结论超声能直接显示羊膜腔内胎儿数目及联体胎儿融合部位,能动态多角度观察双头、双面等畸形,彩色多普勒超声可很好地显示心血管情况,对于有无合并心脏畸形及判断预后有重要意义。
Purpose Conjoined twins is a rare and complex fetal anomaly, with low rate of survival and poor prognosis after birth. This study aims to analyze the prenatal sonographic features of conjoined twins and to improve the accuracy diagnosis of ultrasound in conjoined twins. Materials and Methods Prenatal ultrasonography of11 conjoined twins confirmed by follow-up or autopsy were retrospectively analyzed in our hospital. The number, size, conjointed part, joint used organ and other abnormalities of the fetus were observed by two-dimensional ultrasound. Fetal cardiovascular and cord blood flow were observed by color Doppler. Results Among 11 conjoined twins, 9 were symmetry conjoined twins, including 6 of thorax-omphalopagus, 2 of diprosopus, and 1 of dicephalism, the other 2 were asymmetry conjoined twins（parasites）. The sonographic features of thorax-omphalopagus included connected front chest and abdomen wall,joint used heart, liver or stomach. The sonographic features of diprosopus showed fetus had one body, one head, two upper limbs and lower limbs, two faces, and two sets of ventricular system inside the brain. Ultrasonography of dicephalism revealed one body,two upper limbs, two lower limbs, two heads and two lines of spine. The sonographic features of parasites included skull, spine, and limbs inside the body of fetus. Conclusion Ultrasonography can reveal the number of fetus and conjointed part, and the cardiovascular condition can be detected by color Doppler, which is important to estimate the prognosis of conjoined twins.
出处
《中国医学影像学杂志》
CSCD
北大核心
2016年第5期375-378,共4页
Chinese Journal of Medical Imaging
关键词
双生
联体
超声检查
产前
超声检查
多普勒
彩色
胎儿
Twins
conjoined
Ultrasonography
prenatal
Ultrasonography
Doppler
color
Fetus
