胸腺-胸廓比评价胎儿胸腺大小及其临床意义

发布时间：2018-03-23 04:15

本文选题：超声检查　切入点：产前　出处：《中国医学影像技术》2017年05期 　论文类型：期刊论文

【摘要】：目的探讨胸腺-胸廓比(T-T)评价胎儿胸腺发育的价值。方法对317名孕18~39周健康单胎妊娠孕妇行产前超声检查,于三血管-气管(3VT)切面观察正常胎儿胸腺特征,测量胸骨后缘至主动脉前缘的距离(T1)与胸骨后缘至椎体前缘的距离(T2),二者之比即为T-T值。绘制T-T值随孕周变化的散点图,并进行Spearman回归分析。结果 3VT切面显示胎儿胸腺位于前上纵隔内,表现为一不规则"四边形"低回声实质性结构。正常胎儿T-T平均值为(0.45±0.03)。T-T值与孕周无相关性(r_s=0.06,P=0.29)。结论产前超声检查可清晰显示胎儿胸腺,T-T值可用以评价胎儿胸腺大小,为胎儿胸腺缺如或发育不良提供诊断依据。
[Abstract]:Objective to evaluate the value of thymus-chest ratio (T-T) in evaluating the development of fetal thymus. Methods 317 pregnant women with 1839 weeks of gestation were examined by prenatal ultrasound, and the normal fetal thymus were observed on the three-vessel trachea 3VT section. The distance between the posterior sternum and the anterior aorta and the distance from the posterior sternum to the anterior border of the vertebral body were measured. The ratio of T to T was T-T value. Spearman regression analysis was performed. Results the fetal thymus was located in the anterior superior mediastinum on the 3VT section. The average T-T of normal fetus is 0. 45 卤0.03).T-T. There is no correlation between T T value of normal fetus and gestational age. Conclusion the value of T T in fetal thymus can be clearly displayed by prenatal ultrasound examination, and can be used to evaluate the size of fetal thymus. To provide diagnostic basis for fetal thymus absence or dysplasia.
【作者单位】：广东省人民医院广东省医学科学院超声科;
【分类号】：R445.1;R714.5

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