Dudley N J
Department of Medical Physics and Computing, County Hospital, Lincoln, UK.
Br J Radiol. 1995 Apr;68(808):385-8. doi: 10.1259/0007-1285-68-808-385.
Many methods for fetal weight estimation have been proposed. Earlier formulae were derived solely by regression analysis but more recently formulae based on physical models have been developed. Some of these formulae are lengthy and difficult to use. The main purpose of this study was to evaluate a concise area based formula developed several years ago against popular and recently published formulae. Data from 388 patients over a 5 year period were collected from clinically required ultrasound scans performed within 10 days of delivery. Four of the seven formulae evaluated proved to be equally accurate over a broad range of birthweights (mean absolute deviations 245-249 g), including the area based formula and a circumference based formula derived from it. On the grounds of the number of terms, the precision of coefficients, the physical meaning and the greater accuracy of individual area measurements compared with those derived from circumference, the area based formula should be the method of choice.
已经提出了许多估算胎儿体重的方法。早期的公式完全是通过回归分析得出的，但最近基于物理模型的公式也已开发出来。其中一些公式冗长且难以使用。本研究的主要目的是将几年前开发的一个简洁的基于面积的公式与常用的和最近发表的公式进行评估比较。在分娩前10天内进行的临床所需超声扫描中收集了5年期间388例患者的数据。评估的七个公式中有四个在广泛的出生体重范围内（平均绝对偏差245 - 249克）被证明具有同等的准确性，包括基于面积的公式和由其推导的基于周长的公式。基于项数、系数的精度、物理意义以及与从周长得出的测量值相比单个面积测量的更高准确性，基于面积的公式应是首选方法。
