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PNEUMOCONIOSIS

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Lung diseases resulting from the inhalation of dust SILICOSIS A lung disease seen in industry in which individuals are exposed to quartz/rock dust. – PowerPoint PPT presentation

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Title: PNEUMOCONIOSIS


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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