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"Benign" extra-axial fluid in survivors of neonatal intensive care
Scott A Lorch1, Jo Ann D'Agostino, Robert Zimmerman
1Center for Outcomes Research, Department of Neonatology, The Children's Hospital of Philadelphia, 3535 Market Street, Suite 1029, Philadelphia, PA 19104, USA. lorch@e-mail.chop.edu
Insights
Infants from neonatal intensive care with benign extra-axial fluid (BEAF) show increased risks for developmental delay and cerebral palsy. This condition is linked to prematurity complications like bronchopulmonary dysplasia and extracorporeal membrane oxygenation.
Area of Science:
- Neonatal neurology
- Pediatric neurodevelopment
- Intensive care outcomes
Background:
- Benign extra-axial fluid (BEAF) is a condition observed in some infants following neonatal intensive care.
- Macrocephaly and extra-axial fluid are potential indicators of underlying neurological issues in neonates.
Purpose of the Study:
- To determine the prevalence of benign extra-axial fluid (BEAF) in neonatal intensive care graduates.
- To identify risk factors and the natural history of BEAF in this population.
- To assess the association between BEAF and neurodevelopmental outcomes.
Main Methods:
- A cross-sectional study was conducted at a tertiary care neonatal follow-up clinic.
- Seventy-seven infants with head circumference above the 95th percentile were included.
- Outcomes included bronchopulmonary dysplasia, extracorporeal membrane oxygenation use, and development at 18-24 months.
Main Results:
- 34% of infants had BEAF, 10% had hydrocephalus, and 56% were controls.
- BEAF was associated with higher rates of bronchopulmonary dysplasia and extracorporeal membrane oxygenation (Risk Ratio 6.1).
- Infants with BEAF had increased risks for cerebral palsy (Risk Ratio 9.9) and developmental delay.
Conclusions:
- Benign extra-axial fluid in macrocephalic neonatal intensive care survivors is linked to adverse neurodevelopmental outcomes.
- BEAF is associated with an elevated risk of cerebral palsy and developmental delay compared to controls.
- Early identification and monitoring of BEAF are crucial for managing neurodevelopmental risks in high-risk infants.
Objectives:
To identify the prevalence of "benign" extra-axial fluid (BEAF), the risk factors associated with this condition, and the natural history in "graduates" of neonatal intensive care.
Design:
Cross-sectional study.
Setting:
Neonatal follow-up clinic at a tertiary care center.
Patients:
Seventy-seven infants with a head circumference greater than the 95th percentile by growth percentiles from either the National Center for Health Statistics or the Infant Health and Development Program growth percentile graphs who attended the Neonatal Follow-up Program at The Children's Hospital of Philadelphia between January 1, 1998, and December 31, 2001.
Main Outcome Measures:
Bronchopulmonary dysplasia, extracorporeal membrane oxygenation; development at 18 to 24 months.
Results:
There were 26 infants (34%) in the BEAF group, 43 (56%) in the control group without extra-axial fluid, and 8 (10%) in the hydrocephalus group. Compared with the control group, infants with BEAF were more likely to have bronchopulmonary dysplasia or to require use of extracorporeal membrane oxygenation in the immediate neonatal period (risk ratio, 6.1; 95% confidence interval, 1.5-29.8). Measurements of head circumference in the BEAF group showed rapid growth between 3 and 12 months, followed by growth greater than and parallel to the 95th percentile. Head circumference measurements in the control group showed continued growth along the 95th percentile for age. Infants with BEAF were more likely than controls to develop cerebral palsy (risk ratio, 9.9; 95% confidence interval, 1.3-77.9) and to have evidence of developmental delay at adjusted ages 12 and 18 to 24 months.
Conclusion:
The presence of extra-axial fluid in macrocephalic survivors of neonatal intensive care is associated with an increased risk of developmental delay and cerebral palsy compared with control macrocephalic survivors.
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