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对妊娠晚期的高危孕妇２４４例，于分娩前一周内行彩色多普勒超声监测胎儿脐动脉（ＵＡ）、肾动脉（ＲＡ）以及大脑中动脉（ＭＣＡ）的血流速度波形（ＦＶＷｓ）的搏动指数（ＰＩ），产后随访围产儿预后。根据新生儿出生体重、Ａｐｇａｒ评分和羊水的性质分成预后正常、轻度、中度和重度预后不良等四级。结果：２４４例高危妊娠中，１４６例围产儿预后良好，６９例为轻度预后不良，１２例中度预后不良，１７例为重度预后不良。ＵＡ、ＲＡ和ＭＣＡ的ＦＶＷｓ与围产儿预后不良的程度均有明显的相关性。ＵＡＰＩ预测中度和重度预后不良的准确性较高，ＲＡＰＩ预测中度预后不良的准确性高于轻度和重度，ＭＣＡ在重度预后不良中改变最明显。说明胎儿ＵＡ、ＲＡ和ＭＣＡ的ＦＶＷｓ在胎儿窘迫时均有改变，但在不同程度的胎儿窘迫中，其敏感性不同
244 high-risk pregnant women in the third trimester of pregnancy were performed pulsatility index (FVWs) of fetal umbilical artery (UA), renal artery (RA) and middle cerebral artery (MCA) (PI), postpartum follow-up of perinatal outcome. According to newborn birth weight, Apgar score and the nature of amniotic fluid into normal prognosis, mild, moderate and severe poor prognosis grade four. Results: Among 244 high-risk pregnancies, 146 cases of perinatal children had a good prognosis, 69 cases had mild prognosis, 12 cases had poor prognosis, and 17 cases had severe prognosis. There was a significant correlation between FVWs of UA, RA and MCA and the degree of poor prognosis of perinatal children. The accuracy of UAPI in predicting moderate and severe adverse prognosis is high. The accuracy of RAPI in predicting moderate prognosis is higher than mild and severe, and the most obvious change of MCA is in severe prognosis. FVWs of fetal UA, RA and MCA showed changes in fetal distress, but different degrees of fetal distress, the sensitivity of different