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目的:评价B超测量胎儿双顶径、头围、股骨、腹围预测胎儿体重的准确性,并与临床常用公式估计胎儿体重作比较。方法:选择临产前0～7d、单胎、足月产妇231例,B超测量上述径线预测胎儿体重(方法一),同时测量孕妇宫高、腹围,根据公式计算胎儿体重(方法二),与出生后实际体重比较,并比较不同操作者诊断符合率间的差别。结果:231例产妇的足月胎儿进行预测,出生体重与两种方法的相关系数r值分别为0.914、0.336(均P<0.01),|r|越接近1,相关程度越大,超声体重与出生体重更加符合。方法一和方法二预测正常产、巨大儿及异常产的符合率分别为88.1%、81.0%、64.7%;71.6%、47.6%、23.5%。甲、乙2位操作者的诊断符合率分别为85.3%、80.9%,差异无统计学意义(P>0.05)。结论:超声测量胎儿双顶径、头围、股骨、腹围用于预测胎儿体重是一种简单、准确、易于掌握的方法。
OBJECTIVE: To evaluate the accuracy of B-mode ultrasound for fetus fetus with biparietal diameter, head circumference, femur and abdominal circumference, and to compare with the commonly used formula to estimate fetal body weight. Methods: One to one fetus and full-term pregnant women were selected from 0 to 7 days before labor, 231 fetuses were born, and the diameter of the fetus was measured by B-mode ultrasonography (method 1). Meanwhile, the uterine height and abdominal circumference of pregnant women were measured. , Compared with the actual weight after birth, and compare the differences between the diagnostic accuracy of different operators. Results: A total of 231 maternal full-term fetuses were predicted. The r values of birth weight and the two methods were 0.914,0.336 (all P <0.01). The closer the | r | Birth weight more in line. The coincidence rates of method 1 and method 2 in predicting normal, macrosomia and abnormal production were 88.1%, 81.0%, 64.7%, 71.6%, 47.6%, 23.5% respectively. The diagnostic coincidence rates of two operators of A and B were 85.3% and 80.9% respectively, with no significant difference (P> 0.05). Conclusions: Ultrasound measurement of fetal biparietal diameter, head circumference, femur, abdominal circumference for the prediction of fetal weight is a simple, accurate and easy-to-master method.