Nonreassuring fetal heart rate patterns and nucleated red blood cells in term neonates.
OBJECTIVE
The aim of this study was to evaluate the association between nonreassuring fetal heart rate patterns during labor and umbilical cord nucleated red blood cell counts.


METHODS
Nucleated red blood cell data was collected prospectively from 41 singleton term neonates presented with nonreassuring fetal heart rate patterns and/or meconium stained amniotic fluid during labor (study group) and from 45 term neonates without any evidence of nonreassuring fetal status (controls). Umbilical artery pH, blood gases and base excess were also determined to investigate the correlation between independent variables.


RESULTS
The median nucleated red blood cells per 100 white blood cells were 13 (range 0-37) in the study group and 8 (range 0-21) in the control group. Stepwise regression analysis have identified meconium stained amniotic fluid (R(2) = 0.15, p < 0.0001) and umbilical artery PO(2) (R(2) = 0.1, p = 0.002) as independent variables associated with elevated NRBC counts in patients with nonreassuring fetal heart rate patterns.


CONCLUSIONS
Nucleated red blood cells in the cord blood of newborns were found to be elevated in patients with nonreassuring FHR patterns during labor. However, the wide range and the poor correlation of NRBC count with umbilical artery pH and blood gas values limit its clinical utility as a marker for fetal hypoxia.
Kovalak
E Ebru
EE
Etlik Zubeyde Hanim Women's Health Teaching and Research Hospital, Ankara, Turkey.
Dede
F Suat
FS
Gelisen
Orhan
O
Dede
Hulya
H
Haberal
Ali
A
D000293:Adolescent; D000328:Adult; D001772:Blood Cell Count; D016022:Case-Control Studies; D004900:Erythroblasts; D005260:Female; D005312:Fetal Blood / Q000166:cytology*; D005315:Fetal Diseases / Q000097:blood / Q000503:physiopathology; D005316:Fetal Distress / Q000097:blood*; D006340:Heart Rate, Fetal; D006801:Humans; D000860:Hypoxia / Q000097:blood / Q000503:physiopathology; D007231:Infant, Newborn; D011247:Pregnancy; D047929:Term Birth; D055815:Young Adult