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Severe intrauterine growth retardation; assessment of its origin from fetal arterial flow velocity waveforms
Insights
Doppler ultrasound of umbilical and fetal carotid arteries helps distinguish intrauterine growth retardation (IUGR) causes. Abnormal waveforms suggest placental issues, while normal ones indicate fetal origin, aiding obstetric management.
Area of Science:
- Perinatology
- Fetal Medicine
- Diagnostic Ultrasound
Background:
- Intrauterine growth retardation (IUGR) poses significant risks to fetal well-being.
- Determining the origin of IUGR (fetal vs. utero-placental) is crucial for appropriate management.
- Oligohydramnios is often associated with severe IUGR.
Purpose of the Study:
- To differentiate between fetal and utero-placental origins of severe IUGR with oligohydramnios.
- To assess the utility of Doppler blood flow velocity waveforms in guiding obstetric decisions.
Main Methods:
- Doppler blood flow velocity waveforms were recorded in the umbilical artery and fetal internal carotid artery.
- Study included 10 patients with severe IUGR and marked oligohydramnios (28-37 weeks gestation).
- Maternal serology was negative for fetal infections.
Main Results:
- Six patients with abnormal waveforms indicated utero-placental insufficiency; 4/6 had placental infarction.
- Four patients with normal waveforms suggested a fetal origin; all had structural defects, one diagnosed prenatally.
- Abnormal karyotype was identified in two cases with fetal origin IUGR; no placental infarction was noted.
Conclusions:
- Combined Doppler waveform analysis of umbilical and fetal carotid arteries may help determine IUGR etiology.
- This non-invasive technique can provide valuable information for obstetric management strategies.
- Distinguishing IUGR origins aids in predicting outcomes and planning interventions.
Abstract:
Doppler blood flow velocity waveforms in the umbilical artery and fetal internal carotid artery were recorded in a total of 10 patients with severe intrauterine growth retardation (IUGR) and marked oligohydramnios to establish a fetal or utero-placental origin of IUGR. Gestational age varied between 28 and 37 wk. Negative maternal serology ruled out fetal infections. In six patients, IUGR was associated with abnormal flow velocity waveforms, indicating utero-placental insufficiency. Following delivery, these infants showed no structural defects; moderate to marked placental infarction was documented in 4 out of 6 cases. In the remaining four patients, IUGR was associated with normal flow velocity waveforms, suggesting a fetal origin of the IUGR. Following delivery, all four infants revealed structural defects, only one of which was diagnosed prenatally. Twice an abnormal karyotype was the underlying cause. There was no placental infarction. These preliminary data suggest that combined recording of the flow velocity waveform in the above-mentioned vessels may provide valuable additional information as to the cause of IUGR and as such be helpful in determining obstetric management.