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Comparison of different reference values of fetal blood flow velocity in the middle cerebral artery for predicting fetal anemia
Author(s) -
Bartha J. L.,
Illanes S.,
AbdelFattah S.,
Hunter A.,
Denbow M.,
Soothill P. W.
Publication year - 2005
Publication title -
ultrasound in obstetrics and gynecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.202
H-Index - 141
eISSN - 1469-0705
pISSN - 0960-7692
DOI - 10.1002/uog.1814
Subject(s) - medicine , middle cerebral artery , fetus , anemia , blood flow , cardiology , cerebral blood flow , obstetrics , pregnancy , ischemia , biology , genetics
Objectives To compare different normal reference ranges of fetal blood flow velocity in the middle cerebral artery for predicting fetal anemia. Methods Eight reference ranges of either middle cerebral artery peak or time‐averaged mean velocities were compared using the area under the receiver–operating characteristics (ROC) curve for 113 fetal blood samples from 60 women at risk of fetal red blood cell alloimmunization. Results The areas under the ROC curves of the different ranges were not significantly different but there were marked differences in sensitivity (range, 7.14–91.78%) and specificity (range, 31.25–96.88%) with the currently used cut‐offs. Except for Mari's range, the best theoretical cut‐offs, defined as those having the best sensitivity with the best specificity, differed from those in current use, especially when using time‐averaged mean velocity. Conclusions Any of the previously reported reference ranges perform well in the non‐invasive prediction of fetal anemia. However, with the exception of Mari's curve, the currently employed cut‐offs for predicting fetal anemia should be changed, some of them markedly, in order to provide reliable support for clinical decisions. Copyright © 2005 ISUOG. Published by John Wiley & Sons, Ltd.