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Occupational asthma due to chromium

C Leroyer¹, J D Dewitte, A Bassanets

¹Department of Chest Medicine, Hôpital de la Cavale Blanche, Hôpital Morvan, Brest, France.

Respiration; International Review of Thoracic Diseases

|October 23, 1998

Summary

A roofer developed respiratory symptoms from sawing fiber cement. Inhalation challenges confirmed occupational asthma triggered by potassium dichromate in the cement dust.

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Area of Science:

Occupational Medicine
Environmental Health
Pulmonology

Background:

A roofer experienced work-related respiratory symptoms including cough, shortness of breath, and wheezing.
Symptoms exacerbated during sawing of corrugated fiber cement materials.

Observation:

Normal baseline spirometry and mild bronchial hyperresponsiveness to carbachol were noted.
Skin patch testing for chromium was negative.

Findings:

Specific inhalation challenge with fiber cement dust showed a borderline decrease in forced expiratory volume in 1 second (FEV1).
Nebulization with potassium dichromate (K2Cr2O7) caused an immediate 20% fall in FEV1 and increased bronchial hyperresponsiveness, indicating occupational asthma.

Implications:

Related Experiment Videos

This case highlights potassium dichromate in fiber cement as a potential occupational asthma trigger for roofers.
Suggests the need for targeted workplace exposure monitoring and control measures in the construction industry.