Abstract: ［Abstract］Objective〖HTSS〗To explore the value of blood flow resistance index and ratio of fetal umbilical artery(UA), middle cerebral artery(MCA) and renal artery(RA) in predicting fetal distress with oligohydramnios.
 〖WTHZ〗Methods〖HTSS〗Two hundred and eighty-three pregnant women with gestational weeks of 37 to 41+6 weeks were selected. According to the amount of amniotic fluid, all the cases were divided into oligohydramnios group(83 cases) and control group(200 cases). Meanwhile, fetuses in oligohydramnios group were divided into distress group(n=19) and non-distress group(n=64) according to fetal distress. Among all the fetus, the blood flow spectrum of UA, MCA and RA were obtained by pulsed Doppler technique, and the arterial resistance index(RI) and pulsation index(PI) were measured to calculate RIUA/MCA, PIUA/MCA, RIRA/MCA and PIRA/MCA. Apgar score was recorded at 1 min after birth.
 〖WTHZ〗Results〖HTSS〗The PI and RI of UA and RA in distress group were significantly higher than those in control group and non-distress group, PI and RI of MCA were significantly lower than those in control group and non-distress group, and the levels of RIUA/MCA, PIUA/MCA, RIRA/MCA and PIRA/MCA in distress group were significantly higher than those in control group and non-distress group(P＜0.01). While there were no significant differences in the above-mentioned indexes between control group and non-distress group(P＞0.05).
 〖WTHZ〗Conclusion〖HTSS〗Monitoring the resistance index and ratio of fetal UA, MCA and RA can predict fetal distress with oligohydramnios and indicate clinical treatment timely.

Key words: fetal distress, oligohydramnios, ultrasonography, Doppler