Efficiency of color Doppler flow imaging combined with fetal heart rate monitoring non-stress test in diagnosis of fetal intrauterine distress in high-risk pregnant women in late pregnancy
Objective:To investigate efficiency of color Doppler flow imaging(CDFI)combined with fetal heart rate monitoring non-stress test(NST)in diagnosis of fetal intrauterine distress in high-risk pregnant women in late pregnancy.Methods:The clinical data of 108 high-risk pregnant women in late pregnancy admitted to the hospital from August 2020 to August 2022 were retrospectively selected.CDFI and NST were performed after admission.Using the postpartum results as the'gold standard',the results of CDFI,NST single and combined examination in the diagnosis of fetal intrauterine distress in high-risk pregnant women in late pregnancy were statistically analyzed.The efficiencies of single and combined examination of CDFI and NST in the diagnosis of fetal intrauterine distress in the high-risk pregnant women in late pregnancy were compared.Results:the postpartum results showed that among the108 high-risk pregnant women in late pregnancy,39 cases occurred fetal intrauterine distress before delivery;CDFI examination result showed that there were 25 cases occurred fetal intrauterine distress;NST examination showed that there were 24 case occurred fetal intrauterine distress;and CDFI combined with NST examination showed that there were 38 cases occurred fetal intrauterine distress.There were no significant differences in the sensitivity,specificity,accuracy,missed diagnosis rate,misdiagnosis rate,positive predictive value and negative predictive value of CDFI and NST examination in the diagnosis of fetal intrauterine distress in the high-risk pregnant women in late pregnancy(P>0.05).The sensitivity and accuracy of CDFI combined with NST examination in the diagnosis of fetal intrauterine distress in the high-risk pregnant women in late pregnancy were higher than those of the two single examinations,the missed diagnosis rate was lower than that of the two single examinations,and the differences were statistically significant(P<0.05).Conclusions:The efficiency of CDFI combined with NST examination in the diagnosis of fetal intrauterine distress in the high-risk pregnant women in late pregnancy is higher than that of single examination.