- Cause : chronic bronchitis, bronchopneumonia, other lung parenchymal diseases, pleural effusions or pneumothorax, prolonged lateral recumbency (hypostatic congestion).
- Signs : respiratory distress.
- Diagnosis : radiography
- Treatment : manage underlying cause, lobectomy if irreversible collapse.
- Prognosis : can be good with early treatment - depends on underlying cause.
- Tachypnea, difficulty breathing.
- Lack of resonance on chest percussion if pleural fluid.
- Signs of trauma.
- Good for hypostatic congestion.
- Depends on underlying cause.
Expected response to treatment
- Reinflation of lung lobe on radiographs within hours.
- Improvement in clinical signs.
Reasons for treatment failure
- Delayed treatment → irreversible collapse (fibrosis).
- Infiltration of lung tissue, eg neoplasia.