FitzGerald D E, Stuart B, Drumm J E, Duignan N M
Ultrasound Med Biol. 1984 May-Jun;10(3):371-6. doi: 10.1016/0301-5629(84)90171-6.
Continuous wave Doppler ultrasound was used together with B-mode real time ultrasound to study feto-placental blood flow in utero. The results of 887 examinations on 221 patients are presented. The fetal heart rate acceleration slope and pulsatility index (P.I.) of the audiofrequency ultrasound display were analysed. There was a significant reduction in fetal heart rate (P less than 0.001) and P.I. (P less than 0.001) with advancing gestational age in normal pregnancy. In contrast, in retarded intrauterine growth a significant increase in P.I. values was observed in 77% of patients.
连续波多普勒超声与B型实时超声联合使用，以研究子宫内胎儿-胎盘的血流情况。本文展示了对221例患者进行的887次检查结果。分析了音频超声显示的胎儿心率加速斜率和搏动指数（P.I.）。在正常妊娠中，随着孕周的增加，胎儿心率（P<0.001）和搏动指数（P<0.001）显著降低。相比之下，在子宫内生长迟缓的情况下，77%的患者观察到搏动指数值显著增加。
