Occupational asthma: validity of monitoring of peak expiratory flow ...
Occupational asthma
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Transcript of Occupational asthma
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Occupational asthma
What is an occupational asthma?What is an occupational asthma?
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Occupational asthma
What is an occupational asthma?What is an occupational asthma?
It is asthma caused byIt is asthma caused by
an agent inhaled at workan agent inhaled at work..
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Occupational asthma
• Commonest industrial lung disease.
• Clear cause can be identified (over 400).
• Symptoms resolve completely if kept away from the substance which cause it.
• The longer they exposed the less likely that their symptoms will improve, even if they leave their job.
• Importance of early diagnosis and appropriate action.
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Occupational asthma
Occupational Asthma - Prevalence Occupational Asthma - Prevalence
• 10% of adult onset asthma (kogevinas et al 1999).
• Only 1/3 of patients are identified.
• Affect all socio-economic groups, ages and both sexes.
• Atopics are more susceptible.
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Occupational asthma
O. A. - Health Professional RoleO. A. - Health Professional Role
• Early disease is reversible, but late is irreversible.
• Identify those at risk of O.A.
• Early diagnosis by certain questions.
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Occupational asthma
O. A. - Health Professional RoleO. A. - Health Professional Role
Early referral of those at high risks to chest physician with Occupational interest for :-
- Detailed Medical & Occupational history.
- Immunological investigations as SPT, sIgEs, & specific bronchial provocation test.
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Occupational asthma
O. A. - Health Professional RoleO. A. - Health Professional Role
Meanwhile
•Record Peak Flow every 2 hours (from wake up time – bedtime) for 4 weeks
•May not always be practical
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Occupational asthma
Occupations at risk Occupations at risk
• Paint sprayers• Bakers• Health care workers• Electronic industry (solderers).• Pharmaceutical workers.• Those who Work with animals.• Wood workers.• Detergent industry workers.
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Occupational asthma
O. A. O. A. - Assessment Questions:- Assessment Questions:
1) what is your occupation?
2) when exactly did the asthma start?
3) Is your asthma better on non-working days or holidays?
4) If better- does it vary during the working week?
5) Are there other workers in your place of work with similar symptoms?
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Occupational asthma
O. A. - O. A. - Assessment Questions:Assessment Questions:
• Sensitization start typically 3-6 months or longer.
• If symptoms start before starting work occupational. asthma is unlikely.
• As the disease advance symptoms may persist in weekends.
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Occupational asthma
O. A. – If cause identified :-O. A. – If cause identified :-
• Worker should be removed from environment.
• Relocate the worker within the same employment.
•Not always practical from a financial perspective
•Delay in relocation from the cause have long lasting effects on asthma control.
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Occupational asthma
O. A. – If cause identified :-O. A. – If cause identified :-
• Financial compensation if work related asthma cause is identified.
• Assessment of long term impairment is delayed for at least 2 years after relocation away from occupational exposure (BTS/SIGN)
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