胎儿肾、脑动脉的彩色多普勒监测及其临床意义

Color Doppler imaging in the assessment of fetal renal and cerebralarteries blood flow

作者利用双功能彩色多普勒技术对５２例正常中、晚孕及２２例高危妊娠胎儿大脑中动脉及肾动脉血流频谱进行观察及分析．结果表明随着胎龄的增大，胎儿脑、肾动脉收缩期峰值血流速度明显加快，脑动脉血流阻力指数（ＲＩ）及搏动指数（ＰＩ）略减低，肾动脉ＲＩ及ＰＩ有增加趋势．肾、脑动脉ＲＩ及ＰＩ的比值（ＲＩ，ＰＩ’）于中晚孕无明显变化，好高症及宫内发育迟缓者ＲＩ’及ＰＩ’较正常晚孕组明显增高．以双功能彩色多普勒监测胎儿肾动脉及大脑中动脉血流有一定的临床意义．

Color flow imaging was used to obtain fetal cerebral and renal artery flow velocity waveform in 52normal and 22 high risk pregnancy of second or third trimester gestation.The results showed that the peaksystolic velocity of renal and cerebral arteries increased as the fetus grew,the ratio of RI and PI between re- nal and cerebral arteries is usually constant(1.08～1.09 and 1.19～1.35):while the ratio of PI and RI be- tween renal and cerebral arteries is higher in high-risk pregnancy than in the normal.Renal-cerebral arteries RI and PI ratio can predict perinatal outcome.