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Reduced lung volume associated with acquired pulmonary artery obstruction in children
Insights
Postnatal pulmonary artery obstruction can impair lung growth, leading to reduced lung volume. Restoring pulmonary arterial flow early is crucial to minimize growth impairment and prevent pulmonary hypertension.
Area of Science:
- Pediatric cardiology
- Thoracic surgery
- Developmental biology
Background:
- The impact of postnatal pulmonary artery obstruction on lung development is not well-documented.
- Pulmonary artery banding is a surgical procedure used to manage congenital heart defects.
Observation:
- Two infants undergoing pulmonary artery banding experienced complete right pulmonary artery occlusion.
- This obstruction resulted in reduced volume of the right lung compared to the left.
Findings:
- Histological examination revealed smaller alveoli in the affected lung of one patient.
- Surgical restoration of pulmonary arterial flow normalized the lung volume in the other patient.
Implications:
- Early restoration of pulmonary arterial flow is recommended to prevent impaired lung growth.
- Timely intervention may avoid irreversible pulmonary hypertension in the contralateral lung.
Abstract:
The effect of postnatal pulmonary artery obstruction on lung growth has not previously been reported. This report describes two patients in whom pulmonary artery banding in early infancy was complicated by complete occlusion of the right pulmonary arter. In each case, the right lung became less voluminous than the left. In one patient, the alevoli of the affected lung were found to be smaller than normal at autopsy. In the other patient, surgical reconstitution of pulmonary arterial flow resulted in a return to normal volume of the affected lung. Observations suggest that pulmonary arterial flow should be restored as early as possible to minimize impairment of lung growth and to avoid irreversible pulmonary hypertension in the opposite lung.