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Intrapartum fetal heart rate patterns and neonatal intraventricular hemorrhage
Insights
Fetal heart rate (FHR) patterns during premature labor do not reliably predict intraventricular hemorrhage (IVH) in low-birthweight infants. Current interpretations of FHR tracings are limited and not useful for predicting IVH in this vulnerable population.
Area of Science:
- Neonatalogy
- Obstetrics
- Perinatology
Background:
- Intraventricular hemorrhage (IVH) is a significant concern in low-birthweight infants.
- Perinatal events and labor are implicated as potential contributors to IVH.
- Fetal heart rate (FHR) abnormalities during premature labor are investigated as possible predictors of neonatal IVH.
Purpose of the Study:
- To determine if FHR patterns during premature labor can predict subsequent intraventricular hemorrhage (IVH) in low-birthweight infants.
- To evaluate the utility of intrapartum FHR interpretations in identifying infants at risk for IVH.
Main Methods:
- Review of 5 years of FHR tracings from two university medical centers.
- Inclusion criteria: inborn infants delivered after premature labor, weighing ≤ 2000 gm.
- Comparison of FHR patterns in infants with and without documented IVH.
Main Results:
- Of 64 infants with IVH, only 38 (59%) had discernible FHR patterns during labor.
- FHR interpretations (reassuring, suspicious, ominous) showed no significant difference between infants with and without IVH.
- The predictive value of FHR patterns was limited, particularly before 30 weeks gestation.
Conclusions:
- Intrapartum FHR pattern interpretations are not useful for predicting neonatal IVH in low-birthweight infants.
- The predictive capability of FHR monitoring for IVH in this population is limited.
- Further research may be needed to identify reliable predictors of IVH in premature neonates.
Abstract:
A goal for the obstetrician and neonatologist is to screen for risk factors associated with intraventricular hemorrhage (IVH) in the low-birthweight infant. Perinatal events that lead to neonatal metabolic and cardiovascular derangements seem to provoke IVH, and conflicting reports have implicated labor as being contributory. A fetal heart rate (FHR) abnormality during premature labor may be a predictor of subsequent neonatal IVH. For this reason, 5 years of FHR tracings at two university medical centers were reviewed for inborn infants who were delivered after premature labor and weighed less than or equal to 2000 gm. Sixty-four infants developed IVH, but pre-existing labor with a discernible FHR pattern was recorded in only 38 (59%) cases. Interpretations were reassuring in 17 (45%) cases, suspicious in 7 (18%) cases, and ominous in 14 (37%) cases. This proportion of FHR patterns was not significantly different from a matched group of premature infants without IVH during the same period. Interpretations of intrapartum FHR patterns of low-birthweight infants are limited, especially before 30 weeks gestation, and not useful in predicting neonatal IVH.