Toxic Gases And Fumes

Our plain-English summary of Toxic Gases And Fumes, by A. Seaton, W.K.C. Morgan (1975).

The study

• Authors: A. Seaton, W.K.C. Morgan
• Published: Occupational Lung Diseases (W.K.C. Morgan And A. Seaton, Editors), Philadelphia: W.B. Saunders, Pp. 321-345 (1975)
• Type of article: Book excerpt
• Our copy: from Johns-Manville's own medical library, J-M no. 002830.

In plain English

This textbook chapter on occupational lung diseases is not a research study and does not discuss asbestos. The authors reviewed gases and fumes harmful to workers, grouping their effects into four mechanisms: asphyxiation, local irritation, toxic absorption and allergy. They described asphyxiant gases (carbon dioxide, nitrogen, methane, carbon monoxide, cyanides, hydrogen sulfide), irritant gases (ammonia, chlorine, oxides of nitrogen, ozone, phosgene, sulfur dioxide), fume-related illnesses (metal fume fever and polymer fume fever), and the effects of osmium tetroxide, vanadium compounds, mercury vapor, manganese and cadmium. For most agents they described where exposure occurs and the symptoms, and for many they described treatment or prevention. For nitrogen dioxide (silo filler's disease), they described a relapse that can follow the first illness. They wrote that metal fume fever symptoms subside within 24 to 36 hours. They also wrote that proteinuria occurs in over 80 per cent of workers exposed to cadmium for 10 years or more. On chronic cadmium exposure and emphysema, the authors wrote that a definite answer was not available and must depend on appropriately controlled epidemiological studies.

We wrote this plain-English summary from the full article with the help of AI, and a second AI model checked each sentence against the article. It is not the authors' wording; the abstract and the article are their own account.

What the study did and found

• Design: Textbook chapter (narrative review) on toxic gases and fumes; not an original study
• Who was studied: No study population. The chapter describes workers in jobs exposed to gases and fumes, such as mining, the chemical industry, silo filling, welding and smelting.
• Exposure: Toxic gases and fumes. Asphyxiants covered: carbon dioxide, nitrogen, methane, carbon monoxide, cyanides and hydrogen sulfide. Irritant gases covered: ammonia, chlorine, oxides of nitrogen, ozone, phosgene and sulfur dioxide. Metal and polymer fumes and related agents covered: zinc, copper, PTFE, osmium tetroxide, vanadium pentoxide, mercury vapor, manganese, cadmium, hexavalent chromium, hydrofluoric acid and zinc chloride. Asbestos is not covered.
• Main results:
  • The authors described carbon monoxide as combining with hemoglobin, with a combining power some two hundred times greater than that of oxygen.
  • For nitrogen dioxide inhalation (silo filler's disease), the authors described a relapse with fever and chills that can follow an apparent recovery.
  • The authors wrote that metal fume fever symptoms spontaneously subside within 24 to 36 hours.
  • The authors wrote that proteinuria occurs in over 80 per cent of workers exposed to cadmium for 10 years or more.
• The authors' conclusion: The chapter has no single overall conclusion. On chronic cadmium exposure and emphysema, the authors concluded that a definite answer was not available.
• Limitations the authors state:
  • The authors noted that nitrogen dioxide poisoning does not lend itself to controlled trials, so evidence on treatment such as steroids comes from reports rather than trials.

Topics

Medical terms in this study, explained in our Lexicon: Occupational Lung Disease, Emphysema.

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