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[Blood circulation in retarded and normal offspring of hypertonic pregnant women]
1Aacheni RWTH, Orvostudományi Kar, Szülészeti és Nögyógyászati Klinika.
Insights
Doppler velocimetry in pregnancies with hypertensive disorders identified key blood flow patterns. Ratios of fetal cerebral to umbilical artery blood flow effectively distinguished intrauterine growth retardation (IUGR) from appropriate for gestational age (AGA) infants.
Area of Science:
- Perinatology
- Fetal Medicine
- Cardiovascular Physiology
Background:
- Hypertensive disorders in pregnancy pose risks to fetal development.
- Intrauterine growth retardation (IUGR) is a significant complication.
- Doppler velocimetry is a non-invasive tool for assessing fetal well-being.
Purpose of the Study:
- To evaluate Doppler velocimetry indices in maternal and fetal arteries in pregnancies complicated by hypertensive disorders.
- To determine if specific Doppler indices or their ratios can differentiate between fetuses with IUGR and those appropriate for gestational age (AGA).
Main Methods:
- Doppler velocimetry was performed on 62 women with hypertensive disorders in pregnancy.
- Blood flow velocity was measured in maternal uterine arteries, and fetal umbilical, cerebral, and renal arteries.
- Analysis included individual arterial indices and ratios, particularly cerebral/umbilical artery indices.
Main Results:
- Patients with IUGR showed non-significant increases in uterine, umbilical, and renal artery indices, and a non-significant decrease in middle cerebral artery indices.
- The ratio of middle cerebral to umbilical artery indices was significantly lower in IUGR fetuses compared to AGA fetuses.
- These ratios proved more effective in distinguishing IUGR from AGA fetuses than individual arterial indices.
Conclusions:
- Ratios of Doppler indices, specifically between fetal cerebral and umbilical arteries, are valuable markers for identifying intrauterine growth retardation in pregnancies with hypertensive disorders.
- These ratios offer superior diagnostic capability compared to individual Doppler measurements.
- The findings highlight the utility of advanced Doppler analysis in managing high-risk pregnancies.
Abstract:
Doppler velocimetry was carried out on 62 women with hypertensive disorders in pregnancy. From this group, 19 infants with intrauterine growth retardation (IUGR, defined as gestational age related birth weight of < 10.percentile) were born. The rest 43 were appropriate for gestational age (AGA, > 10. percentiled). Blood flow velocity studies were performed in maternal uterine vessels, and fetal umbilical, cerebral and renal arteries. Patients with IUGR exhibited a not always significant increase of indices in uterine, umbilical and renal arteries, and a non significant decrease in middle cerebral arteries. The difference was more marked when the ratio of cerebral/umbilical indices were calculated and compared. In this case the ratio of IUGR fetuses were half of the AGA, fetuses with significant differences. The value same reflective of IUGR were obtained in the ratio between arteria umbilicalis/middle cerebral artery indices. These ratios more clearly separate the IUGR from AGA fetuses, than any other indice of the investigated artery alone. There were in the study material one case of cerebral hemorrhage and one case of intrauterine death. Both belonged to the IUGR group.