Fong K, Ryan M L, Cohen H, Amankwah K, Ohlsson A, Myhr T, Hannah M
Department of Medical Imaging, Women's College Hospital, University of Toronto, Ontario, Canada.
J Ultrasound Med. 1996 Apr;15(4):317-21. doi: 10.7863/jum.1996.15.4.317.
Using color and pulsed Doppler ultrasonography, the interobserver reliability of measurements in the fetal circulation was evaluated in 41 pregnancies of 25 to 39 weeks' gestation. Two observers recorded flow velocity waveforms from the middle cerebral and renal arteries for measurement of peak systolic, minimum diastolic, and mean velocities, pulsatility index, and resistive index. Intraclass correlation coefficient of reliability was calculated by analysis of variance. Substantial interobserver agreement was found for pulsatility index and minimum diastolic velocity in both arteries. Therefore, these measurements have the greatest clinical applicability.
利用彩色和脉冲多普勒超声，对25至39周妊娠的41例孕妇胎儿循环测量的观察者间可靠性进行了评估。两名观察者记录了大脑中动脉和肾动脉的血流速度波形，以测量收缩期峰值、舒张期最小值、平均速度、搏动指数和阻力指数。通过方差分析计算可靠性的组内相关系数。发现两条动脉的搏动指数和舒张期最小速度在观察者间有高度一致性。因此，这些测量具有最大的临床适用性。
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