Interstitial Lung Disease Flashcards
What is interstital lung disease?
Wide spread lung fibrosis
What can cause ILD?
Occupational - fumes - asbestos Sarcoidosis SLE Amyloidosis
What happens in fibrosis?
Replacement of damaged cells
- injured with inflammation
Focal fibrosis = response to irritants
Diffuse parenchymal diseae
- occurs with idiopathic lung disease
- extrinsic allergic alveolitis
What can cause upper-middle zone ILD?
Aspergillosis Pneumoconiosis Extrinisic allergic alveolitis Negative sero arthropathies TB
What can cause mid-lower zone?
Sarcoidosis Toxins Asbestosis Idiopathic pulmonary fibrosis Rheum
What is idiopathic pulmonary fibrosis?
Lungs enter pro-inflammatory state driven by macrophages and fibroblasts
Promotes fibrosis and destruction of alveoli
What is the spirometry patter of idiopathic pulmonary fibrosis?
Restrictive
What is the presentation of ILD?
SoB
Dry cough
Inspiratory fine crackles
Clubbing
What is the spirometry pattern of ILD?
Restrictive pattern
Reduced FVC
Normal FEV-1
What investigations would you do for ILD?
Bloods
- FBC
- U+Es
- CRP
CXR
HR-CT
What would the CXR show?
Reduced lung volume
Increased lung markings
What would the HRCT show?
Honeycomb sign
- large airspaces with fibrotic walls
How is ILD managed?
Pulmonary rehab
Smoking cessation
Acute exacerbation = corticosteroids
What is extrinsic allergic alveolitis?
Hypersensitivity reaction caused by inhalation of allergens
What can cause EAA?
Bird fancier’s lung
Farmer’s lung
Malt worker’s lung