Related Experiment Videos
Pulmonary function in chronic respiratory failure of infancy
Insights
This study investigated pulmonary function in infants with bronchopulmonary dysplasia (BPD) requiring mechanical ventilation. Survivors demonstrated improved ventilation despite persistent airway resistance and low lung compliance, showing potential for home care.
Area of Science:
- Pediatrics
- Pulmonology
- Neonatology
Background:
- Bronchopulmonary dysplasia (BPD) is a chronic lung disease in infants.
- Mechanical ventilation is often required for infants with severe BPD.
- Pulmonary function abnormalities are common in infants with BPD.
Purpose of the Study:
- To assess pulmonary function in infants with BPD dependent on mechanical ventilation.
- To identify factors associated with recovery from chronic respiratory failure in these infants.
- To evaluate the potential for home care in surviving infants.
Main Methods:
- Studied pulmonary function in 7 infants (3-16 months) with BPD on mechanical ventilation.
- Characterized breathing patterns including airway resistance, lung compliance, and respiratory frequency.
- Monitored end-tidal carbon dioxide tension and minute ventilation.
Main Results:
- Infants exhibited raised expiratory airway resistance, low dynamic lung compliance, and rapid respiratory frequency.
- Elevated end-tidal carbon dioxide tension was observed despite high minute ventilation.
- Four infants recovered from respiratory failure between 1.2-2.5 years, maintaining high minute ventilation despite persistent airway resistance and low compliance.
Conclusions:
- Infants with BPD on mechanical ventilation show significant pulmonary dysfunction.
- Recovery is possible with the ability to sustain adequate minute ventilation despite ongoing lung disease.
- Surviving infants, though developmentally delayed, show potential for home care with continued growth.
Abstract:
We studied pulmonary function in 7 infants age 3-16 months who were dependent upon mechanical ventilation due to bronchopulmonary dysplasia (BPD). Raised lower expiratory airway resistance (RAe), low dynamic lung compliance (CL) and rapid respiratory frequency (f) characterized the breathing pattern in these infants. End-tidal carbon dioxide tension (PECO2) was elevated in spite of abnormally high minute ventilation (VE). One infant died of respiratory failure, 1 died of sepsis and 1 of an occluded tracheostomy after discharge from the hospital. Another infant still requires mechanical ventilation at age 18 months. Recovery from chronic respiratory failure in 4 infants occurred between age 1.2-2.5 years. The infants recovered concomitant with the ability to sustain a high VE in spite of persistently elevated RA and low CL. All of the surviving infants, although developmentally delayed, have the potential for home care with further growth and development.