eMedicine Specialties > Pediatrics: General Medicine > Pulmonology
Pulmonary Hypoplasia: Follow-up
Updated: Mar 5, 2009
Follow-up
Further Outpatient Care
- Because bronchopulmonary dysplasia (BPD) is likely in survivors of pulmonary hypoplasia, infants have an increased risk of fatality and serious morbidity with upper respiratory tract infection (URI) and lower respiratory tract infection (LRI).
- Respiratory syncytial virus (RSV) prophylaxis should be considered during RSV season in infants younger than 2 years who have required oxygen in the previous 6 months. The dose of palivizumab is 15 mg/kg/mo through the RSV season, which, in most parts of the United States, is from October to March.
- Patients with pulmonary hypoplasia should be considered as having a chronic pulmonary disease. Therefore, once they are older than 6 months, they should receive the influenza vaccine at the start of every influenza season, which is October or November in the United States. The dose of influenza vaccine is 0.25 mL per dose of the split virus vaccine. Children younger than 8 years should receive 2 doses 2 months apart for the first time. Children older than 8 years require 1 dose.
- Similarly, these patients are considered high risk and should be administered the pneumococcal vaccine (PCV 7) at a dose of 0.5 mL intramuscularly until they are aged 5 years.
Inpatient & Outpatient Medications
- Because these patients should be considered as having chronic lung disease, various aerosolized medications such as bronchodilators and corticosteroids should be considered if symptoms suggest reactive airway disease or obstructive airway disease.
- Persistent pulmonary hypertension can be treated with various vasodilators and endothelin inhibitors.
Complications
- Reduced exercise tolerance, even in mild cases
- Scoliosis in adolescent years
- Recurrent respiratory infections
- Pneumothorax - Spontaneous or as a result of respiratory support
- Persistent pulmonary hypertension caused by a reduced pulmonary vascular bed and worsened by hypoxia or a coexisting left-to-right intracardiac shunt
- BPD in survivors of pulmonary hypoplasia caused by prolonged ventilatory support
- Chronic pulmonary insufficiency - May persist in diaphragmatic hernia and pulmonary hypoplasia
- Airway abnormalities, including tracheobronchial compression and tracheomalacia caused by the displaced aorta and enlarged left pulmonary artery
Prognosis
- Right-sided hypoplasia has a worse prognosis than left-sided hypoplasia, probably because of the loss of the bigger right lung mass and more severe mediastinal shift and great vessel displacement.
- The oligohydramnios tetrad of pulmonary hypoplasia, positional limb deformities, Potter facies, and intrauterine growth retardation has a very poor prognosis.
- A minimum lung volume of 45% compared with age-matched control subjects has been shown to be a predictor of survival in neonates with diaphragmatic hernia treated with extracorporeal membrane oxygenation (ECMO). Similarly, a functional residual capacity of 12.3 mL/kg, about one half the normal capacity, has been thought to be a predictor of survival in pulmonary hypoplasia with congenital diaphragmatic hernia (CDH).
Miscellaneous
Medicolegal Pitfalls
- When clinically recognized, pulmonary hypoplasia has a poor prognosis. It is frequently associated with severe and irreversible lesions, such as renal agenesis and thanatophoric dysplasia. Therefore, families must be fully informed and encouraged to participate in decisions to start aggressive and invasive treatments.
- Medical care, respiratory support (eg, extracorporeal membrane oxygenation [ECMO]), surgical intervention (eg, fetal surgery), and dialysis should be carefully considered in view of poor outcomes and prognosis.
The authors and editors of eMedicine gratefully acknowledge the previous contributions of Yazan Said, MD, to the writing and development of this chapter.
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Further Reading
Keywords
pulmonary hypoplasia, pulmonary aplasia, bronchopulmonary dysplasia, BPD, treatment, diagnosis, underdevelopment of the lung, hypoplastic lung, carina, congenital diaphragmatic hernia, cystic adenomatoid malformation, CAM, prolonged rupture of membranes, fetal renal dysplasias, lung hypoplasia, oligohydramnios, hydrops fetalis, respiratory distress, apnea, ventilatory support, pneumothorax, arthrogryposis, Potter facies, hypertelorism, epicanthus, retrognathia, depressed nasal bridge, abdominal masses, tracheoesophageal fistula, imperforate anus, communicating bronchopulmonary foregut malformation, pleural effusion, asphyxiating thoracic dystrophy, achondroplasia, thanatophoric dwarfism, osteogenesis imperfecta, thoracic neuroblastoma, hydrothorax, urinary tract obstruction, renal dysplasia, tetralogy of Fallot
Follow-up: Pulmonary Hypoplasia