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Pulmonary air-leak syndromes refer to conditions where air escapes from the alveoli or airways into extra-alveolar spaces, due to barotrauma, overdistension, or alveolar rupture. These syndromes are most commonly seen in preterm neonates or infants requiring mechanical ventilation, particularly with underlying lung pathology (e.g., RDS, MAS).
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Types of Air-Leak Syndromes
| Type | Air leaks into |
|---|---|
| Pulmonary interstitial emphysema (PIE) | Interstitial tissues |
| ‣ | Pleural space |
| ‣ | Mediastinum |
| Pneumopericardium | Pericardial sac |
| ‣ | Subcutaneous tissues (neck, chest wall) |
| ‣ | Peritoneal cavity (if air dissects inferiorly) |
Risk factors:
| General | Specific signs |
|---|---|
| Respiratory distress | Tachypnea, retractions, nasal flaring |
| Sudden deterioration | Hypoxia, bradycardia, cyanosis |
| Asymmetric chest expansion | Suggests pneumothorax |
| Decreased breath sounds | Unilateral, if large pneumothorax |
| Scrotal swelling (air tracking) | Seen in subcutaneous emphysema or pneumoperitoneum |