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Clinical correlations and pulmonary function at 8 years of age after severe neonatal respiratory failure
Carina M Majaesic1, Richard Jones, Irina A Dinu
1Department of Pediatrics, University of Alberta, Edmonton, Alberta, Canada. CarinaMajaesic@cha.ab.ca
Insights
Severe neonatal respiratory failure survivors often experience reduced lung function. Congenital diaphragmatic hernia and extracorporeal membrane oxygenation increase the risk of poorer pulmonary outcomes in these children.
Area of Science:
- Pediatric Pulmonology
- Neonatal Intensive Care
- Respiratory Medicine
Background:
- Severe neonatal respiratory failure poses significant risks to long-term lung health.
- Understanding the pulmonary sequelae is crucial for appropriate patient management and follow-up.
Purpose of the Study:
- To investigate the pulmonary outcomes in survivors of severe neonatal respiratory failure.
- To identify risk factors associated with adverse pulmonary sequelae.
Main Methods:
- A multicenter, prospective study involving 54 survivors of neonatal respiratory failure.
- Pulmonary function testing (spirometry, lung volumes) was conducted at 8 years of age.
- Univariate analysis was used to determine risk factors for adverse outcomes.
Main Results:
- Mean forced vital capacity (FVC) and forced expiratory volume (FEV1) were reduced in the cohort.
- 54% of subjects had normal spirometry, while 19% showed airflow obstruction and 27% reduced FVC.
- Poorer outcomes were linked to congenital diaphragmatic hernia (CDH), extracorporeal membrane oxygenation (ECMO), low birth weight for gestational age, prolonged hospitalization, and need for oxygen.
Conclusions:
- Neonates with severe respiratory failure, particularly those with CDH or treated with ECMO, are at higher risk for impaired pulmonary function.
- These high-risk infants require close monitoring and follow-up to manage potential long-term respiratory issues.
Objectives:
The aim of this study was to determine the pulmonary sequelae of severe neonatal respiratory failure.
Study Design:
This was a multicenter, prospective study. Fifty-four survivors of neonatal respiratory failure (oxygenation indices >25 on two occasions), completed pulmonary function testing at 8 years of age. Thirty-one (57%) received extracorporeal membrane oxygenation (ECMO). Pulmonary outcome was based on spirometry and lung volume data. Pulmonary outcome for each diagnostic and treatment group is reported as mean and as percent predicted. Individually subjects were also classified based on spirometry, as either normal, obstructed (defined as forced expiratory volume (FEV(1)) in 1 sec:forced vital capacity (FVC) of <80 % predicted, or with reduced FVC (FCV of <80% predicted) with normal FEV(1)/FVC. Risk for adverse outcome was determined using univariate analysis.
Results:
Mean FVC, FEV(1) and FEV(25-75) were reduced in the total cohort. The reduction was greatest in the subgroup with CDH and the group treated with ECMO. Assessed individually, 54% of subjects had normal spirometry and lung volumes, 19% airflow obstruction, and 27% reduced FVC. Poorer pulmonary outcome was linked to ECMO, congenital diaphragmatic hernia (CDH), birth weight for gestational age <10th percentile, duration of hospitalization, or need for prolonged supplemental oxygen.
Conclusion:
Neonates with severe respiratory failure due to CDH or needing ECMO and small for gestation are at increased risk of poorer pulmonary outcome and require close follow-up.
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