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Predictors of early lung function in patients with congenital diaphragmatic hernia
Tiffany Wright1, Amy Filbrun1, Benjamin Bryner1
1University of Michigan, Ann Arbor, MI.
Insights
Infants with congenital diaphragmatic hernia (CDH) show mild lung function deficits early on. Severity markers like ECMO and prolonged ventilation correlate with reduced lung function in children with CDH.
Area of Science:
- Pediatric Pulmonology
- Neonatal Surgery
- Respiratory Physiology
Background:
- Congenital diaphragmatic hernia (CDH) can lead to long-term pulmonary issues, including airflow obstruction.
- Early assessment of lung function in CDH patients is crucial for understanding developmental trajectories.
Purpose of the Study:
- To identify factors predicting lung function in the first three years of life for infants with CDH.
- To analyze pulmonary function data in relation to disease severity.
Main Methods:
- Retrospective analysis of infant pulmonary function testing (IPFT) data from 2006-2012.
- Utilized raised volume rapid thoracoabdominal compression and plethysmography for IPFT.
- Included 29 neonates with CDH who underwent IPFT within the first three years of life.
Main Results:
- Airflow obstruction was the most frequent abnormality (14/29 infants).
- Extracorporeal membrane oxygenation (ECMO), prolonged ventilation, and oxygen use were significantly associated with restrictive lung disease (p<0.05).
- Mean predicted survival was 63%±4%, with 48% requiring ECMO.
Conclusions:
- Children with severe CDH exhibit mild pulmonary deficits in early childhood.
- Clinical indicators of disease severity, such as ECMO, ventilator duration, and oxygen dependency, are linked to impaired lung function development.
- Early IPFT provides valuable insights into the pulmonary consequences of CDH.
Purpose:
Long-term pulmonary outcomes of congenital diaphragmatic hernia (CDH) have demonstrated airflow obstruction in later childhood. We examined pulmonary function data to assess what factors predict lung function in the first three years of life in children with CDH.
Methods:
This was a retrospective study of patients treated for CDH who underwent infant pulmonary function testing (IPFT) between 2006 and 2012. IPFT was performed using the raised volume rapid thoracoabdominal compression technique and plethysmography.
Results:
Twenty-nine neonates with CDH had IPFTs in the first 3years of life. Their mean predicted survival using the CDH Study Group equation was 63%±4%. Fourteen infants (48%) required extracorporeal membrane oxygenation (ECMO). The mean age at IPFT was 85.1±5weeks. Airflow obstruction was the most common abnormality, seen in 14 subjects. 12 subjects had air trapping, and 9 demonstrated restrictive disease. ECMO (p=0.002), days on the ventilator (p=0.028), and days on oxygen (p=0.023) were associated with restrictive lung disease.
Conclusion:
Despite following a group of patients with severe CDH, lung function revealed mild deficits in the first three years of life. Clinical markers of increased severity (ECMO, ventilator days, and prolonged oxygen use) are correlated with reduced lung function.
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