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Prediction of Preeclampsia with Elevation in Erythroblast Count in Maternal Blood

Author(s):
F Davari TanhaF Davari Tanha1,*, J Mohammad PourJ Mohammad Pour2, M KavehM Kaveh3, M ShariatM Shariat4
1Assistant Professor, Department of Obstetrics and Gynecology, Mirza Kochek Khan Hospital, Tehran University of Medical Sciences, Tehran, Iran
2Assistant Professor, Department of Pediatrics,Mirza Kochek Khan Hospital, Tehran University of Medical Sciences, Tehran, Iran
3Epidemiologist, Mirza Kochek Khan Hospital, Tehran University of Medical Sciences, Tehran, Iran
4Resident, Department of Obstetrics and Gynecology, Mirza Kochek Khan Hospital, Tehran University of Medical Sciences, Tehran, Iran


Shiraz E-Medical Journal:Vol. 9, issue 3; 120-128
Published online:Jul 01, 2008
Article type:Research Article
Received:May 13, 2007
Accepted:Jan 27, 2008
How to Cite:F Davari TanhaJ Mohammad PourM KavehM ShariatPrediction of Preeclampsia with Elevation in Erythroblast Count in Maternal Blood.Shiraz E-Med J.9(3):120-128.

Abstract

Introduction:

The predominant etiologic theory of preeclampsia is that reduced uteroplacental perfusion is the unique pathogenic process in the development of preeclampsia. Maternal and fetal erythroblast counts are elevated in the peripheral blood of pregnant women with preeclampsia. The purpose of this study was to examine whether this elevation actually occurs before the clinical onset of the disorder.

Study Design:

In a prospective cohort survey erythroblasts were enumerated in 599 maternal blood samples obtained in 19-26 weeks with singleton pregnancy. After complete blood count a peripheral blood smear was done and erythroblast was counted , and results were subsequently correlated with pregnancy outcomes. The data were analyzed by SPSS 13.0.Independent sample t-test and Fishers exact test was used. A p value of

Results:

Significantly higher quantities of erythroblasts (mean 2.46?1.23 vs. 0.44?0.55; p=0.009) were detected in blood samples obtained from women who later acquired preeclampsia (n=50) than in blood samples from the control Cohort (n=549). Intrauterine growth restriction was accompany by a similar rise in erythroblast count (mean NRBC 0.82?0.8 in preeclamptic group vs. 0.59?0.85 in normotensive group; p=0.009). Mean gestational age was less in preeclamptic group (37.58?1.45 vs. 39.07?0.94, p=0.009).On the basis of 1.5 erythroblast as point of convergence there was sensitivity =61.45, specificity=93.02,NPV=98.16, accuracy=91.65

Conclusion:

Because a large proportion of the erythroblasts in maternal blood are fetal origin, our data suggest that fetal-maternal cell traffic is affected early in pregnancies that are later complicated by preeclampsia.

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