| Objective: To investigate the value of detecting fetal UA, MCA and RA hemodynamic indexes by color doppler ultrasound in fetal distress.Methods: 100 cases of late pregnant women whose age were 22 to 35 years old and gestational age 37 to 42 weeks were selected. They were divided into two groups, 52 cases in normal control group and 48 cases in fetal distress group. First routine obstetric ultrasound examination was carried out to determine fetal position, measure BPD, HR, AFI, and exclude fetal abnormalities by color doppler ultrasound. Next the peak systolic velocity (S) and end diastolic velocity (D) ratio (S/D), resistance index (RI) and pulsatility index (PI ) of fetal umbilical artery, middle cerebral artery, renal artery were detected, storing images and datas were analyzed offline. Umbilical artery blood was collected and blood gas analysis was conducted immediately after fetal delivery. At the same time, 1 minute score of postpartum was conducted and babies were weighted by experienced midwives after fetal delivery. Finally, amniotic fluid postpartum, 1 minute Apgar score postpartum, birth weight and umbilical arterial blood gas results were analyzed.Results: 1.The resistance indexes of UA and RA in fetal distress group were significantly higher than those in normal control group (P <0.01). 2.The resistance indexes of MCA were significantly lower than those in normal control group (P <0.01).3.Apgar score and blood gas analysis results in normal control group were better than those in fetal distress group. 4. The area under the ROC curve of RA was slightly smaller than that of UA and MCA. The sensitivity, specificity and Youden index of S/D of UA and MCA, RI of RA and PI of MCA were higher.Conclusion: Detecting hemodynamic indexes of fetal UA, MCA and RA by color doppler ultrasound can supply a more accurate understanding of the fetal intrauterine conditions, predict fetal intrauterine hypoxia and provide a new method to diagnose fetal distress. |
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