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Long-term pulmonary sequelae in children who were treated with extracorporeal membrane oxygenation for neonatal
Refika Hamutcu1, Toni A Nield, Meena Garg
1Division of Pediatric Pulmonology, Childrens Hospital Los Angeles, University of Southern California Keck School of Medicine, Los Angeles, CA 90027, USA.
Insights
Neonatal extracorporeal membrane oxygenation (ECMO) survivors experience lasting lung problems into childhood. Higher oxygen and ventilator pressures during ECMO treatment correlate with worse long-term lung function.
Area of Science:
- Pediatric Pulmonology
- Neonatal Intensive Care
- Respiratory Medicine
Background:
- Extracorporeal membrane oxygenation (ECMO) is crucial for neonates with severe respiratory failure.
- Long-term pulmonary outcomes for ECMO survivors are not well understood.
Purpose of the Study:
- To investigate the long-term pulmonary sequelae in children treated with neonatal ECMO.
- To identify factors influencing pulmonary outcomes after neonatal ECMO.
Main Methods:
- A cohort of 50 children treated with neonatal ECMO and 27 healthy controls underwent pulmonary function tests, exercise testing, and completed respiratory questionnaires.
- Participants were assessed at approximately 11 years of age.
Main Results:
- ECMO survivors exhibited hyperinflation, airway obstruction, reduced exercise oxygen saturation, and lower peak oxygen consumption compared to controls.
- ECMO survivors showed more rapid, shallow breathing during exercise and a higher incidence of exercise-induced bronchospasm.
- Higher inspired oxygen and ventilator pressures during ECMO were associated with poorer lung function (lower FEV1 and oxygen saturation) in later childhood.
Conclusions:
- Neonatal ECMO survivors experience persistent lung injury into later childhood.
- Lung dysfunction is linked to the degree of barotrauma and oxygen exposure during neonatal ECMO treatment.
Objective:
Extracorporeal membrane oxygenation (ECMO) is a life-saving therapy for neonates with intractable respiratory failure, but the long-term pulmonary outcome is unknown. Our aim was to investigate the long-term pulmonary sequelae of these children.
Study Design:
We studied 50 children at 11.1 +/- 1.1 years (mean +/- SD) who had been treated with neonatal ECMO for meconium aspiration syndrome (38%), sepsis (18%), sepsis with pneumonia (12%), congenital diaphragmatic hernia (12%), congenital heart disease (8%), persistent pulmonary hypertension of the newborn (6%), and respiratory distress syndrome (4%) and 27 healthy controls (10.8 +/- 1.6 years). All subjects completed a respiratory questionnaire and performed pulmonary function and graded cardiopulmonary exercise testing.
Results:
Neonatal ECMO survivors had hyperinflation (median residual volume: 131%), airway obstruction (median forced expired volume in 1 second: 79%), lower oxygen saturation with exercise, and lower peak oxygen consumption than controls. The ECMO group achieved similar exercise minute ventilation to controls, with more rapid and shallow breathing. ECMO survivors had an increased frequency of exercise-induced bronchospasm. Those who required higher inspired oxygen tension and ventilator pressures after weaning from ECMO had lower forced expired volume in 1 second and oxygen saturation values.
Conclusion:
Neonatal ECMO survivors experience lung injury lasting into later childhood. Lung dysfunction correlates with the extent and duration of barotrauma and oxygen exposure as neonates.
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