一种便于实际应用的超声估计孕龄的方法  

A convenient practical application method for estimating gestational age by ultrasonography

作　　者：张清连[1] 张灌生[1] 钟跃[1] 

机构地区：[1]内江市第一人民医院,四川内江641000

出　　处：《四川医学》2014年第1期117-119,共3页Sichuan Medical Journal

摘　　要：目的 探索一种简单的便于实际应用的超声估计孕龄的方法.方法 应用超声显像对328例20~41周孕的正常妊娠妇女进行检查,从所测量的胎儿多项参数中选择出肝脏横径（LTD）、双顶径（BPD）及股骨长（FL）三种参数.将这三种参数进行不同形式的组合,与实际孕龄进行相关和回归分析,然后从不同的回归公式中选择出计算最简单且误差也较小的公式.结果 两个估计孕龄的公式简化式为：① EA=2（LTD＋BPD）＋2; ② EA=2（LTD＋FL）＋6.经过对另外50例孕妇的前瞻性验证表明,这两个简化公式估计胎儿孕龄的误差皆在±2.0周以内.结论 应用本文估计孕龄的简化公式,通过心算即可迅速得出结果,且误差较小.Objective To explore a convenient practical application method for estimating gestational age by ultrasonography. Methods 328 cases normal pregnant women at 20 -41 weeks gestation were examined by ultrasonography, three parameters liver transverse diameter （LTD）, biparietal diameter （BpD） and femur length （FL） were chosen from various fetal parameters. These three parameters were combined in different forms, correlation and regression analysis were done with the actual gestational age, and then the most simple calculation and smaller error formula were selected from different regression formulas. Results Finally two estimating gestational age formulas were chosen, their correlation coefficients were 0. 9564 and 0. 9518 respectively, the residual standard deviation were 0. 56 and 0. 57 weeks respectively. Then two formulas were simplified, simplified formulas respectively were ： ① EA = 2 （ LTD ＋ BPD） ＋ 2; ② EA = 2 （LTD ＋ FL） ＋ 6. The prospective validation of other 50 cases pregnancy women showed that estimating gestational age error of these two simplified formulas within ± 2. 0 weeks. Conclusion When these two simplified formulas in this paper were used to estimate gestational age, the results could be get quickly through the mental arithmetic, and error was smaller.

关 键 词：超声显像 孕龄 简单公式 

分 类 号：R445.1[医药卫生—影像医学与核医学]