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Related Experiment Videos

Airflow limitation and changes in pulmonary function among bleachery workers.

A J Mehta1, P K Henneberger, K Torén

  • 1Division of Respiratory Disease Studies, National Institute for Occupational Safety and Health, 1095 Willowdale Road, Morgantown, WV 26505, USA.

The European Respiratory Journal
|July 5, 2005
PubMed
Summary

Pulp mill workers exposed to ozone and other irritant gases showed declines in lung function. Peak exposures to these gases, including chlorine dioxide and sulfur dioxide, are linked to chronic airflow limitation and should be prevented.

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Area of Science:

  • Occupational Health
  • Pulmonary Medicine
  • Environmental Health

Background:

  • Pulp mills utilize chemicals like ozone, chlorine dioxide (ClO2), and sulfur dioxide (SO2), posing potential respiratory risks to workers.
  • Chronic airflow limitation and rapid pulmonary function decline are significant occupational health concerns.

Purpose of the Study:

  • To investigate the association between peak exposures to irritant gases (ozone, ClO2, SO2) and chronic airflow limitation in pulp mill workers.
  • To determine if specific gas exposures correlate with declines in pulmonary function over time.

Main Methods:

  • A cohort study of 178 bleachery workers and 54 unexposed comparison workers from Swedish pulp and paper mills.
  • Baseline (1995-1996) and follow-up (1998-1999) surveys included spirometry and questionnaires on gas exposures.

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  • Regression models controlled for potential confounding factors.

    • Main Results:

    • Declines in forced expiratory volume in one second (FEV1) and forced vital capacity (FVC) were associated with chlorine dioxide/sulfur dioxide gassings.
    • Elevated prevalence of chronic airflow limitation was observed in workers with pre-baseline and/or interval ozone gassings.
    • Ozone gassings were linked to obstructive effects, while ClO2/SO2 gassings may also impact spirometry.

    Conclusions:

    • Occupational exposure to ozone in pulp mills is associated with obstructive lung effects.
    • Exposures to chlorine dioxide and sulfur dioxide may also contribute to adverse spirometry findings.
    • Preventing peak exposures to irritant gases in pulp mill environments is crucial for worker respiratory health.