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Related Experiment Videos

Asthma, lung function, and bronchial responsiveness in welders

Z P Wang1, K Larsson, P Malmberg

  • 1National Institute of Occupational Health, Solna, Sweden.

American Journal of Industrial Medicine
|December 1, 1994
PubMed
Summary

This study found no significant difference in asthma incidence between stainless steel (SS) and mild steel (MS) welders. However, welders reported more airway symptoms than vehicle fitters.

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Area of Science:

  • Occupational Health
  • Pulmonology
  • Environmental Medicine

Background:

  • Welding fumes are known respiratory irritants.
  • Previous studies suggest varying risks for asthma associated with different welding materials.
  • Occupational asthma is a significant concern in metal fabrication industries.

Purpose of the Study:

  • To compare the incidence of asthma in stainless steel (SS) welders versus mild steel (MS) welders.
  • To assess bronchial responsiveness and lung function in active welders.
  • To evaluate the prevalence of airway symptoms in welders compared to a non-welder reference group.

Main Methods:

  • Comparative study of SS and MS welders with defined occupational exposure history.
  • Mailed questionnaires to assess reasons for leaving work, focusing on airway symptoms.

Related Experiment Videos

  • Spirometry and bronchial provocation tests for ex-welders and active welders.
  • Lung function measurements and symptom recording in active welders and a reference group of vehicle assemblers.

    • Main Results:

    • No significant difference in the incidence of welding-associated asthma per 1,000 welding-years between SS (5%) and MS (7%) welders.
    • Active SS and MS welders showed normal bronchial responsiveness and lung function, comparable to each other and to vehicle assemblers.
    • Welders, irrespective of steel type, exhibited a significantly higher prevalence of airway symptoms compared to vehicle fitters.

    Conclusions:

    • The incidence of welding-associated asthma does not significantly differ between stainless steel and mild steel welders.
    • While objective lung function and bronchial responsiveness were not impaired, welders experience a higher burden of subjective airway symptoms.
    • Further research may be needed to understand the long-term impact of welding fumes on respiratory health beyond diagnosed asthma.