Khaĭdar A M
Akush Ginekol (Sofiia). 1997;36(3):13-6.
In 750 uncomplicated singleton pregnancies, 1765 examinations have performed to establish the normograms for 4 Ultrasound techniques of measurement of amniotic fluid volume (AFV). The 90% and 95% and 98% confidence intervals for each method across gestation (16-43 weeks) were calculated from polynomial regression equation for 50th percentile from logarithmic transformed data, and antilog values were plotted in graphical representation for modified amniotic fluid Index (MAFI). The variations of the mean values of data between weeks were statistically significant (p < 0.00001). Normograms show the progressive increase of AFV up to 27-29 weeks (27-32 weeks plateau), then declined to term. In postdate period the decrease of AFV was 7%-10% weekly for MAFI. In term gestation, the mean AFV of 5th and 95th percentile that defines the lower and upper limits were 6.7 & 21.3 cm for MAFI, 6.2 & 19.9 cm for AFI (amniotic fluid index), and for maximum vertical single pocket (MVP)--2.5 & 7.4 cm and for two-diameter pocket (TDP)--10.4 & 51.0 c2.
在750例无并发症的单胎妊娠中，进行了1765次检查，以建立4种羊水体积（AFV）超声测量技术的正常参考值范围。通过对对数转换数据的第50百分位数的多项式回归方程，计算了各方法在整个孕期（16 - 43周）的90%、95%和98%置信区间，并将反对数绘制在改良羊水指数（MAFI）的图表中。各孕周之间数据均值的变化具有统计学意义（p < 0.00001）。正常参考值范围显示，AFV在27 - 29周（27 - 32周平台期）前逐渐增加，然后下降至足月。在过期妊娠期间，MAFI的AFV每周下降7% - 10%。在足月妊娠时，定义下限和上限的第5百分位数和第95百分位数的平均AFV，MAFI分别为6.7和21.3 cm，羊水指数（AFI）为6.2和19.9 cm，最大垂直单深度（MVP）为2.5和7.4 cm，双径深度（TDP）为10.4和51.0 c2。
