Doppler ultrasonography in detection of middle cerebral artery peak systolic velocity for the diagnosis of fetal anemia / 中国医学影像技术

ABSTRACT

Objective To detect the normal value of the fetal middle cerebral artery peak systolic velocity (MCA-PSV) with Doppler ultrasonography, and to investigate the association between MCA-PSV and fetal anemia. Methods Doppler ultrasonography was performed in 535 normal pregnant women from the 14th to the 40th week of gestation. MCA-PSV was measured, and the standard value of the normal fetal MCA-PSV was established. Fetuses with abnormal high MCA-PSV were assessed with a standard of MCA-PSV＞mean vale of gestational weeks+2 standard deviation or 1.5 multiples of mean value of gestational weeks. Results The value of normal fetal MCA-PSV correlated well with the gestational weeks (linear regression equation was MCA-PSV＝-9.955+1.561×weeks; r＝0.795, P<0.0001). Using 1.5 multiples of the mean of different gestational weeks to diagnose the moderate and severe fetal anemia, 7 fetuses were screened out of 209 of obstetric ultrasonography; 4 of them had MCA-PSV＞1.5 multiples of mean value of gestational weeks and were proved with induced labor. Conclusion The value of 1.5 multiples of mean value of gestational weeks of fetal MCA-PSV in prenatal ultrasonography might be an important clue for the diagnosis of fetal anemia.