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The British Thoracic Society & Scottish Intercollegiate Guidelines Network
- In patients with adult onset, or reappearance of childhood asthma, healthcare professionals should consider that there may be an occupational cause
- Adults with airflow obstruction should be asked:
- are you better on days away from work?
- are you better on holiday?
- Those with positive answers should be investigated for occupational asthma
- In suspected work-related asthma, the diagnosis of asthma should be confirmed using standard objective criteria
- Objective diagnosis of occupational asthma should be made using serial peak flow measurements, with at least four readings per day
- Skin prick testing or tests for specific IgE should be used in the investigation of occupational asthma
caused by high molecular weight agents
- A single measurement of non-specific reactivity should not be used
for the validation of occupational asthma
- Relocation away from exposure should occur as soon as diagnosis is
confirmed, and ideally within 12 months of the first work-related
symptoms of asthma