[Dynamic observation of pulmonary function by plethysmography in preterm infants with bronchopulmonary dysplasia]

Area of Science:

• Neonatal Medicine
• Pediatric Pulmonology
• Respiratory Physiology

Background:

• Bronchopulmonary dysplasia (BPD) is a chronic lung disease affecting preterm infants.
• Preterm birth can lead to underdeveloped lungs, increasing susceptibility to respiratory complications.
• Understanding the impact of BPD on lung function is critical for timely intervention.

Purpose of the Study:

• To investigate the effects of BPD severity on lung function in preterm infants.
• To assess changes in lung function parameters over the first month of life.
• To evaluate the utility of plethysmography for monitoring BPD-related lung changes.

Main Methods:

• Seventy-two preterm infants were categorized into non-BPD, mild BPD, and moderate BPD groups.
• Lung function was measured using plethysmography on days 7, 14, and 28 post-birth.
• Key parameters assessed included tidal volume, functional residual capacity, airway resistance, and respiratory rate.

Main Results:

• All infants showed improvements in tidal volume, functional residual capacity, and expiratory flow ratios over time.
• Infants with mild and moderate BPD exhibited significantly lower tidal volumes, functional residual capacity, and expiratory flow ratios compared to non-BPD infants.
• Moderate BPD was associated with higher airway resistance and respiratory rate than mild BPD, particularly on day 7.

Conclusions:

• Preterm infants with BPD experience significant pulmonary function impairment.
• The severity of BPD correlates with the degree of lung function deficits.
• Plethysmography provides valuable dynamic monitoring for assessing lung development in preterm infants with BPD.