Yarkoni S, Reece E A, Wan M, Holford T, Romero R, Hobbins J C
J Ultrasound Med. 1986 Dec;5(12):707-10. doi: 10.7863/jum.1986.5.12.707.
To determine the relative accuracy of fetal weight estimation using the biparietal diameter (BPD), the abdominal circumference (AC), and the femur length (FL) in three formulae (BPD/AC, FL/AC, and BPD/AC/FL), 63 patients in labor were examined. All patients delivered within 24 hours of ultrasound examination. A good correlation was found between the estimated fetal weight and the actual birth weight, using the three formulae: BPD/AC (r = 0.96); FL/AC (r = 0.95); and BPD/AC/FL (r = 0.96). The FL/AC formula overestimated fetal weight (P less than 0.01), however, particularly in fetuses weighing more than 2000 g. The mean percentage error with the BPD/AC formula was 0.99 per cent, 3.82 per cent with the FL/AC, and 2.43 per cent with the BPD/AC/FL formula. This study showed that although all three formulae were comparable, the best estimation of the birth weight was obtained when either the BPD/AC or the BPD/AC/FL formulae were used. Additionally, the results demonstrate that reliable estimates of fetal weight can be made even at term or in laboring patients.
为了确定使用双顶径（BPD）、腹围（AC）和股骨长度（FL）的三个公式（BPD/AC、FL/AC和BPD/AC/FL）估算胎儿体重的相对准确性，对63例临产患者进行了检查。所有患者在超声检查后24小时内分娩。使用这三个公式（BPD/AC，r = 0.96；FL/AC，r = 0.95；BPD/AC/FL，r = 0.96）时，估算的胎儿体重与实际出生体重之间发现了良好的相关性。然而，FL/AC公式高估了胎儿体重（P小于0.01），特别是在体重超过2000g的胎儿中。BPD/AC公式的平均百分比误差为0.99%，FL/AC为3.82%，BPD/AC/FL公式为2.43%。本研究表明，虽然所有三个公式都具有可比性，但使用BPD/AC或BPD/AC/FL公式时对出生体重的估算最佳。此外，结果表明，即使在足月或临产患者中也可以对胎儿体重做出可靠的估算。
