Gerson A, Free S M, Russino J, Maenner G, Weitz G, Young L
Department of Obstetrics/Gynecology, Lankenau Hospital, Wynnewood, PA 19096, USA.
Ultrasound Obstet Gynecol. 1997 Aug;10(2):98-102. doi: 10.1046/j.1469-0705.1997.10020098.x.
This study was performed to describe a methodology for a two-pocket amniotic fluid index (AFI) for each fetus of a twin gestation. Data included 216 pairs of measurements that were analyzed to yield regressions (curves) for all observations, as well as for the larger and smaller AFI of each observation on a particular set of twins. The twin AFI increased non-linearly until week 27. From week 27 to week 36, decreasing linear trends were found. Measures of intrasonographer, intersonographer, within-mother and between-mothers variation are reported. The estimates of variation were used to plot confidence limits for all three curves.
本研究旨在描述一种用于双胎妊娠中每个胎儿的双囊羊水指数（AFI）的方法。数据包括216对测量值，对其进行分析以得出所有观察值的回归（曲线），以及特定双胞胎组中每个观察值的较大和较小AFI的回归（曲线）。双胎AFI在孕27周前呈非线性增加。从孕27周到孕36周，发现呈下降的线性趋势。报告了超声检查者内、超声检查者间、母亲体内和母亲间变异的测量值。变异估计值用于绘制所有三条曲线的置信限。
