Bistoletti P
Gynecol Obstet Invest. 1986;22(2):79-83. doi: 10.1159/000298895.
Fetal weight prediction with ultrasonic measurements of biparietal diameter (BPD) and abdominal circumference (AC) using the equation by Shepard et al. [1982] was tested prospectively in 310 fetuses. Fetuses of all weight categories were included. The error of weight prediction was in the range of +684 to -880 g. One SD of prediction error was 242 g or 8.5% of birth weight. An overestimation was seen in a fetus with a birth weight of less than 2,500 g (1 SD = 183 g or 10% of birth weight). An underestimation could be observed in a fetus with a birth weight of more than 4,000 g (1 SD = 259 g or 5.7% of birth weight). The use of a combination of BPD and AC is more accurate than the use of each of these parameters. In a fetus with a birth weight of less than 2,500 g, the equations by Thurnau et al. [1983] and Weinberger et al. [1984] are of equal clinical value. The method of Shepard et al. should be complemented with measurements of the 'cephalic index' to exclude fetuses with brachycephaly or dolichocephaly, but one should be aware that the variability of weight prediction is high (2 SD = 11.4-19.8% of birth weight).
采用谢泼德等人[1982年]的公式，通过超声测量双顶径（BPD）和腹围（AC）对胎儿体重进行预测，并在310例胎儿中进行了前瞻性测试。纳入了所有体重类别的胎儿。体重预测误差在+684克至-880克范围内。预测误差的一个标准差为242克，即出生体重的8.5%。出生体重小于2500克的胎儿出现了高估情况（一个标准差=183克，即出生体重的10%）。出生体重大于4000克的胎儿出现了低估情况（一个标准差=259克，即出生体重的5.7%）。联合使用BPD和AC比单独使用这些参数更准确。对于出生体重小于2500克的胎儿，图尔瑙等人[1983年]和温伯格等人[1984年]的公式具有同等的临床价值。谢泼德等人的方法应辅以“头指数”测量，以排除短头畸形或长头畸形的胎儿，但应注意体重预测的变异性很高（两个标准差=出生体重的11.4-19.8%）。
