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Journal of Ultrasound in Medicine, Vol 17, Issue 4 223-229, Copyright © 1998 by American Institute of Ultrasound in Medicine

JOURNAL ARTICLE

Fetal cerebral and umbilical artery blood flow changes during pregnancy complicated by malaria

P. Arbeille, G. Carles, F. Bousquet, G. Body and J. Lansac
Institut National de la Sante et de la Recherche Medicale (INSERM 316), Departement Medecine Nucleaire et Ultrasons, CHU Trousseau, Tours, France.

The objectives of our study were to quantify the fetal cerebral artery and umbilical artery blood flow changes daily during a malaria crisis in a pregnant patient and evaluate the sensitivity and the specificity of Doppler indices for the prediction of acute fetal distress at the end of the pregnancy. The study, designed as a prospective and observational one, was carried out in the obstetric department of a government hospital in French Guiana, on 23 women with pregnancies complicated by malaria (age range, 23 +/- 5 years; primiparas, 30%); crisis date: 30.8 +/- 2.5 weeks of gestation; start of treatment: 3.7 +/- 1.3 days after crisis started). The main measures of outcome consisted of daily determinations of fetal Doppler indices during the crisis, evidence of fetal distress (fetal heart rate decelerations) during labor, Apgar scores after birth, gestational age at birth, mode of delivery, and birth weight. During the crisis umbilical artery resistance index increased by 5 to 20% (P < 0.05), cerebral artery resistance index decreased by 5 to 20% (P < 0.05), and CURR decreased by 10 to 35% (P < 0.01), indicating flow redistribution toward the brain. No relationship was found between the CURR value and the following data: parasitemia grade, parity, gestational age of the crisis, date and mode of delivery, and fetal weight. A change in the hypoxia index (% change in CURR during the crisis x number of days of crisis) greater than 150 was associated with abnormal fetal heart rate in 75% of the cases, and a hypoxia index lower than 150 was associated with normal fetal heart rate in 90% of the cases (sensitivity, 89%; specificity, 77%). Lastly, the combination (hypoxia index > 150 and CURR < 1) was associated with abnormal fetal heart rate in 80% of the cases, and one or two of these normal parameters were associated with normal fetal heart rate in 84.6% of the cases (sensitivity, 80%; specificity, 84%). The CURR and the hypoxia index during the malaria crisis can be used to predict acute fetal distress at delivery.


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P. Arbeille, G. Carles, N. Tobal, S. Herault, M. Georgescus, F. Bousquet, and F. Perrotin
Fetal Flow Redistribution to the Brain in Response to Malaria Infection: Does Protection of the Fetus Against Malaria Develop Over Time?
J. Ultrasound Med., July 1, 2002; 21(7): 739 - 746.
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Copyright © 1998 by the American Institute of Ultrasound in Medicine.