Hecher K, Spernol R, Szalay S, Stettner H, Ertl U
Abteilung für Geburtshilfe und Gynäkologie, LKH-Klagenfurt.
Ultraschall Med. 1989 Aug;10(4):226-9. doi: 10.1055/s-2007-1005996.
In 209 pregnancies without complications we recorded blood velocity waveforms of the umbilical artery and the foetal aorta between 29 and 42 weeks of gestation by means of a Duplex-pulsed Doppler system (umbilical artery: n = 276; foetal aorta: n = 244). We calculated the pulsatility index (PI) and the resistance index (RI). Both indices were normally distributed. The regression lines and reference ranges for the 95% confidence intervals are shown. The PI as well as the RI of waveforms of the umbilical artery demonstrated a significant fall with increasing gestation. The PI of the foetal aorta demonstrated a gentle, non-significant fall; RI showed no changes throughout the third trimester. Comparisons with the reference ranges published by other authors are discussed.
在209例无并发症的妊娠中，我们使用双功脉冲多普勒系统记录了妊娠29至42周期间脐动脉和胎儿主动脉的血流速度波形（脐动脉：n = 276；胎儿主动脉：n = 244）。我们计算了搏动指数（PI）和阻力指数（RI）。两个指数均呈正态分布。显示了回归线和95%置信区间的参考范围。脐动脉波形的PI和RI均随孕周增加而显著下降。胎儿主动脉的PI呈轻微、无显著下降；RI在整个孕晚期无变化。讨论了与其他作者发表的参考范围的比较。
