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PNEUMOCONIOSIS

PNEUMOCONIOSIS. Lung diseases resulting from the inhalation of dust. SILICOSIS. A lung disease seen in industry in which individuals are exposed to quartz/rock dust. An old disease even found in mummies.

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PNEUMOCONIOSIS

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  1. PNEUMOCONIOSIS Lung diseases resulting from the inhalation of dust

  2. SILICOSIS • A lung disease seen in industry in which individuals are exposed to quartz/rock dust. • An old disease even found in mummies. • Primarily seen in individuals who work in rock quarries, slate quarries, and other industries where quartz dust is present in respirable size.

  3. SILICOSIS IS CAUSED BY: • The inhalation of free silica (silica dioxide) crystals. • Blood cells attack and digest the silica dioxide which in turn develops silicic acid. • The acid in turn kills the blood cells which also release chemicals which damages the lungs and leads to fibrosis.

  4. FIBROSIS • Damaged lung tissue with eventual formation of fibers. • Usually named after the associated dust type: • Crystalline silica - Silicosis • Asbestos - Asbestosis • Coal - Coal miners pneumoconiosis

  5. CHARACTERISTICS • Shortness of breath following physical exertion. • Severe cough • Fatigue • Loss of appetite • Chest pains • Fever

  6. SMOKING AND SILICOSIS • Smoking cigarettes complicates all the pneumoconiosis diseases. • Smokers who work around asbestos have a higher risk of lung cancer. • Symptoms of silicosis are very similar to lung cancer and emphysema.

  7. IMPORTANT CHANGE • On October 22, 1996 the International Agency for Research on Cancer (IARC) reclassified crystalline silica as a Class 1 carcinogen or considered to be a human carcinogen. • Formerly a Class 2 carcinogen or probable human carcinogen.

  8. NORMAL BODY DEFENSES • Mucous and hair in respiratory lining catch many particles of dust. • Smoking complicates this. • Coughing expels dust particles. • The smaller particles go deepest into the lungs.

  9. PRECAUTIONS • Engineering Controls: • Water baths • Ventilation • Enclosed cabs • Industrial Hygiene Monitoring • Wearing of PPE

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