Clinical value of color Doppler ultrasound detection of blood flow frequency spectrum of fetal middle cerebral artery and umbilical artery for predicting fetal distress in late pregnancy

ObjectiveTo compare the clinical value of color Doppler ultrasound detection of fetal umbilical artery (UA) and middle cerebral artery (MCA) hemodynamics in predicting fetal distress in late pregnancy.

MethodsPregnant women in late pregnancy were selected and randomly divided into fetal distress group(n=80) and non-fetal distress group(n=200).UA indexes including systolic and diastolic velocity ratio (S/D), resistance index(RI) and blood flow pulsation index(PI) were detected in 40 patients, and MCA indexes including RI and PI were detected in other 40 patients from fetal distress group.UA indexes including S/D, RI and PI were detected in 100 patients, and MCA indexes including RI and PI were detected in other 100 patients from non-fetal distress group.

ResultsUA indexes including S/D, RI and PI in fetal distress group were significantly higher than those in non-fetal distress group(P < 0.01), and MCA indexes including RI and PI in fetal distress group were significantly lower than those in non-fetal distress group (P < 0.01).The detection rates of UA and MCA indexes for fetal distress were 85.0% (34/40) and 67.5% (27/40), respectively, and the difference of which was statistically significant(χ²=6.05, P < 0.05).The misdiagnosis rates of UA and MCA indexes for fetal distress were 9.0% (9/100) and 2.0% (2/100), respectively, and the difference of which was statistically significant (χ²=4.71, P < 0.05).

ConclusionsBoth UA and MCA indexes have important clinical values in the prediction of fetal distress.The detection rate of UA index for fetal distress is higher than that of MCA index, but the misdiagnosis rate of UA index is also higher than that of MCA index.