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Doppler velocimetry in prolonged pregnancy
C Battaglia1, E Larocca, A Lanzani
1Department of Obstetrics and Gynecology, University of Modena, Italy.
Obstetrics and Gynecology
|February 1, 1991
Summary
Doppler velocimetry of the fetal descending thoracic aorta can identify high-risk post-term pregnancies. Reduced blood flow velocity indicates potential complications like oligohydramnios and fetal distress, aiding in timely intervention.
Area of Science:
- Perinatal medicine
- Fetal physiology
- Diagnostic imaging
Background:
- Post-term pregnancies require careful monitoring for potential complications.
- Assessing fetal well-being in prolonged gestations is crucial for optimizing perinatal outcomes.
Purpose of the Study:
- To evaluate the utility of Doppler velocimetry in identifying fetuses at risk in post-term pregnancies.
- To investigate the association between fetal arterial blood flow and adverse perinatal events.
Main Methods:
- Eighty-two post-term pregnancies (≥287 days) underwent nonstress testing, amnioscopy, ultrasound, and Doppler velocimetry.
- Analyzed uterine, umbilical, descending thoracic aorta, renal, and middle cerebral artery velocimetry.
- Monitored maternal-fetal indices including hPL, estriol, hematocrit, platelets, and uric acid.
Main Results:
- No abnormalities were detected in uterine, umbilical, middle cerebral, or renal artery velocimetry.
- A significant reduction in descending thoracic aorta mean velocity correlated with oligohydramnios, meconium-stained fluid, and abnormal nonstress tests.
- This reduction was also linked to an increased rate of cesarean delivery for fetal distress.
Conclusions:
- Serial Doppler flow measurements of the fetal descending thoracic aorta offer a simple and rapid method for risk assessment.
- This technique can identify prolonged pregnancies at higher risk for perinatal complications.
- Identifying at-risk fetuses allows for timely intervention to improve perinatal outcomes.