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Related Experiment Videos

[Persistent reactive airway dysfunction syndrome after exposure to chromate]

Y Nagasaka1, N Nakano, Y Tohda

  • 1Fourth Department of Internal Medicine, Kinki University School of Medicine, Osaka, Japan.

Nihon Kyobu Shikkan Gakkai Zasshi
|July 1, 1995
PubMed
Summary

A single exposure to chromate gas caused reactive airway dysfunction syndrome (RADS) in a patient, leading to persistent asthma symptoms for eight years. This case highlights a rare instance of RADS following industrial chromate exposure.

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Area of Science:

  • Occupational Medicine
  • Pulmonology
  • Toxicology

Background:

  • Reactive Airway Dysfunction Syndrome (RADS) is a non-immunologic asthma-like condition triggered by acute exposure to high concentrations of irritant vapors or gases.
  • Industrial exposure to chemicals can lead to significant respiratory health issues, necessitating thorough investigation and diagnosis.

Observation:

  • A 42-year-old male developed acute wheezing and dyspnea within 20 minutes of accidental exposure to chromate gas at a manufacturing plant.
  • The patient exhibited a positive skin reaction to chromite (Cr2O3) and a significant decrease in Forced Expiratory Volume in 1 second (FEV1.0) after an inhalation challenge.
  • Lung biopsy revealed bronchospasm and inflammation but ruled out bronchiolitis obliterans.

Findings:

  • The patient met the diagnostic criteria for RADS, characterized by rapid onset of symptoms post-exposure, persistent asthmatic symptoms, obstructive pulmonary dysfunction, and airway hyperreactivity.

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  • Despite initial treatment, the patient experienced chronic asthmatic symptoms lasting eight years, requiring long-term corticosteroid and bronchodilator therapy.
  • This represents a previously unreported case of RADS following occupational chromate exposure.

    • Implications:

    • This case underscores the potential for severe, long-term respiratory consequences from acute industrial irritant gas exposure.
    • It highlights the importance of recognizing RADS in occupational settings and considering chromate compounds as a potential trigger.
    • Further research into the mechanisms and long-term management of chromate-induced RADS is warranted.