胎儿心胸径线及比值的测量与临床价值

目的　测量胎儿心脏面积及胸腔面积 ,了解胎儿心胸比值的范围和临床价值。　方法　采用实时超声对 75 0例妊娠 16～ 40周正常孕妇的胎儿心脏及胸腔径线的测量和面积计算 ,并得出每一孕龄组的胎儿心脏面积与胸腔面积的平均比值。　结果　胎儿心脏面积与胸腔面积均与孕龄呈高度正直线相关关系 ,每一孕龄组的胎儿心胸比值在 0 .2 0左右 ,不超过 0 .30。　结论　超声测量胎儿心脏面积与胸腔面积可作为推算胎儿孕龄、估计胎儿宫内生长发育的生物物理指标之一。胎儿的心胸比值一般不超过 0 .30 ,增大者可考虑胎儿先心病或胎儿水肿的可能。

The Measurement of Fetal Cardiothoracic Diameters, Ratio and the Clinical Value

Objective To measure the fetal heart area and chest area in the same plane. To find out range of cardiothoracic ratio and the clinical value. Methods Among 750 normal pregnant women with gestational ages from 16 to 40 weeks underwent ultrasonographic measurement of the fetal heart and chest diameters and areas. The average value of the cardiothorcic ratio of the each gestational age's group was obtained by calculating. Results Both the heart area and the thorax area were highiy linearilized with the gestational age. The cardiothoracic ratio of each gestational age's group was around 0.20 and was not preponderated over 0.30. Conclusions Ultrasonic measurement of the fetal heart area and thorax area is one of the reliable biophysical parameter for estimating fetal age and growth in uterus. As the cardiothoracic ratio is over 0.30, congenital heart disease or fetal edema should be considered.