Lung collapse causes, manifestations, DDx, investigations and treatment

Here, we are going to discuss lung collapse regarding its aetiology, clinical picture, Differential diagnosis, diagnostic investigations and treatment .
What are the causes of lung collapse ?

Aetiology
1- Congenital
It is due to decreased surfactant which is a lipoprotein secreted by the alveolar epithelium causing decrease of the surface tension of fluids lining the alveoli.

Also, aspiration of amniotic fluid during labour ==> collapse .
2- Acquired

How to diagnose lung collapse ?

manifestations of lung collapse

Symptoms
• Manifestation of the cause
• Dyspnea, cyanosis
Signs
• Inspection : retraction, diminished movement J,.
• Palpation : - Low TVF , it becomes High if the underlying bronchus is patent.
- mediastinal shift to the same side
• Percussion : dullness
• Auscultation : decreased intensity of breath sounds - bronchial breathing may be present if the underlying bronchus is patent.
Differential diagnosis (D.D) of lung collapse

1- From other causes of syndrome of multiple -ve signs e.g effusion & fibrosis.
2- Consolidation
3- Acute dyspnea and post operative lung complications .

Investigations
1- X-ray shows :
- Overcrowded ribs
- Raised copula
- Mediastinal Shift
- Collapsed lung ( Homogenous opacity, well defined border )
2- Bronchoscopy to detect the cause as F.B. or secretions and also to remove them .
Treatment of lung collapse
Source : Lung collapse causes, manifestations, DDx, investigations and treatment