胎儿小脑横径预测出生体重的相关性分析

Birth weight prediction by B-type ultrasonicmeasurement of fetal transverse cerehellardiameter.

应用Ｂ超对２２２例正常孕妇在分娩前一周内测量胎儿小脑横径（ＣＤ）、双顶径（ＢＰＤ）、腹围（ＡＣ）、股骨长度（ＦＬ），并计算与胎儿体重的关系。结果：ＣＤ与体重的对数值相关性最好，其次分别为ＡＣ、ＢＰＤ，ＦＬ。逐步回归分析中，ＣＤ的Ｆ值最大，其次分别为ＡＣ，ＢＰＤ，Ｐ值＜０．０５，经一元，二元，三元方程回代与临床验证，ＣＤ进入方程预测胎儿体重的正确率高于ＡＣ，ＢＰＤ，平均误差率低于ＡＣ，ＢＰＤ。提示：小脑横径可作为预测胎儿出生体重的可靠指标。

he fetal transverse cerebellar diameter(CD),biparietal diameter(BPD),abdominal circumference(AC)and femur lcngth(FL)were measured by B-typeultrasonography on 222 normal pregnant women withone week before the expected date of confinement(EDC)and their correlations with birth weight ofnewborns were computerized. Single factorial analyses showed the best correla-tion was between CD and birth weitht(R=0.9134)where as the R value for birth weight and AC,BPD,FL was0.739 5,0.6125,0.347 6 respectively. The F value of CD on stepwise regression analy-sis was the highest(F=1001,95)while that of AC andBPD was 4.55,4.36 respectively(P<0.05).Then theregression eq uations of signle double and triple fac-tors were established .It was confirmed by clinical find -ings that the equation of log(BW)=2.8844+0.01416×CD was the most reliable one in predicting the birthweight.The error rate was less than 10 % in 96%of the newborns.