Correlation Between Cerebroplacental Ratio And Chronic Fetal Distress And Perinatal Outcome

Objective To investigate the effect of cerebroplacental ratio(CPR)and other blood flow related indicators on the diagnosis of chronic fetal distress and the prediction of perinatal outcome.Methods The target population:200 cases of pregnant women who received regular prenatal examination and gave birth in hospital in our hospital were selected,with the gestational weeks ranging from 32 to 41 weeks.Among them,100 cases of pregnant women who were clinically diagnosed with fetal distress were selected as the study group.In addition,100 pregnant women without fetal distress symptoms and with a good perinatal outcome were selected as the normal control group.2.Research methods:Firstly,screening was performed on the selected subjects.None of them had any disease before pregnancy,and the medical history was inquired to verify the gestational week;Secondly,color Doppler ultrasonography was used to monitor the hemodynamic parameters of the middle cerebral artery and fetal umbilical artery,namely the pulsation index,the resistance index and the systolic peak flow rate/enddiastolic flow rate,and then calculate the cerebroplacental ratio,which is the ratio of the pulsatility index of the middle cerebral artery to the pulsation index of the umbilical artery.Record ventricular systolic peak(S),ventricular diastolic peak(D),and maximum atrial systolic reflux rate(A)of fetal ductus venosus,and measure S/A values.Fetal movement,fetal heart monitoring,neonatal Apgar score and perinat alweight were recorded.Finally,the clinical value and reliability of cerebral placen tarate and above fetal blood flow index in diagnosing fetal distress were discussed.Results1.In the study group,the pregnant woman’s cesarean section rate is high,easy to premature birth;Neonatal birth weight and Apgar score were lower than the normal group,and the difference was statistically significant(P<0.05).2.When PI < 0.81 of middle cerebral artery,PI > 1.93 of umbilical artery and CPR < 0.91 were used to diagnose fetal distress,the sensitivity and specificity were 77% and 83%,respectively.76%,77%;89%,90%.Moreover,fetal CPR in the study group was significantly lower than that in the normal group,and the difference was statistically significant(P<0.05).3.S,D and A of DV in the study group were all lower than that in the normal group,while S/A value was higher than that in the normal group.The S/D,PI and RI values of MCA were significantly lower than those of the normal group.The PI,RI and S/D values of UA were significantly higher than those of the normal group.The above differences were statistically significant(P<0.05).Conclusion1.Doppler monitoring of the hemodynamic parameters of the middle cerebral artery umbilical artery and venous catheter is of great significance for the diagnosis of chronic fetal distress.2.Compared with the middle cerebral artery or umbilical artery,the cerebroplacental rate has higher sensitivity and specificity in the diagnosis of chronic fetal distress,which has certain diagnostic value for chronic fetal distresst.