Occupational lung diseases

1.Occupational asthma-Change occupation ,use mask

2.Occupational COPD-Biomass fuel smoke

3.Pneumoconiosis

             Long term exposure to mineral/inorganic dust

             Coal worker pneumoconiosis

             Silicosis(Stone crushing/silica is most fibrogenic)

             Asbestosis

             Stanosis

             Siderosis

       1st 3 are very dangerous

4.Hypersensitivity pneumonitis

               By  organic dust

               Type 3/4 hypersensitivity

               E.g..Farmer's lung ,bird falciers lung ,byssinosis ,malt workers lung , cheese worker lung ,humidifier fever

               Treatment-Avoid source ,protective measure and steroid

5.Extensive allergic alveolitis

6.Occupational lung cancer-Radon gas ,beryllium ,diesel exhaust ,cadmium ,chromium ,radiation staff

Byssinosis-Exposure to cotton brack in cotton and flax factory ,severe attack at 1st working day in monday or after a leave ,called monday fever

Caplan syndrome

1.Pneumoconiosis

2.Arthritis

3.Rh/nodule

Egg shell calcification

Silicosis>Hillar lymphadenopathy>calcification of node

Difference

Traits	Obstructive lung disease	Restrictive lung disease
FEV1	Reduced	Reduced
FVC	Normal	Normal/reduced
FEV1 : FVC	Reduced	Normal/increased
Examples	Asthma ,COPD ,bronchiectasis	Diffuse parenchymal lung disease/DPLD