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Asthma is a chronic respiratory ailment that requires careful management due to its varying symptoms and influencing factors. It is characterized by airway inflammation, bronchial hyperresponsiveness, and reversible airflow obstruction, leading to symptoms like wheezing, shortness of breath, chest tightness, and coughing. The symptom frequency and intensity may vary considerably over time. It is also linked to immune system responses to allergens and irritants, highlighting the complex...
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Irritant-Induced Asthma.

Catherine Lemiere1, Gabriel Lavoie1, Virginie Doyen2

  • 1Department of Chest Medicine, CIUSSS du Nord de l' Île de Montréal, Hôpital du Sacré-Cœur de Montréal, Montréal, Québec, Canada.

The Journal of Allergy and Clinical Immunology. in Practice
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PubMed
Summary
This summary is machine-generated.

Irritant-induced asthma (IIA) is a lung condition caused by inhaling irritants. This review covers its causes, diagnosis, and management, highlighting its impact on occupational health.

Keywords:
AsthmaIrritant agentsIrritant-induced asthmaRADS

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Area of Science:

  • Pulmonology and Occupational Medicine

Background:

  • Irritant-induced asthma (IIA) is a distinct asthma phenotype resulting from exposure to inhaled irritant agents.
  • It is classified as definite, probable, or possible based on irritant concentration and symptom onset relative to exposure.
  • Definite IIA accounts for 4-14% of new-onset work-related asthma cases.

Approach:

  • This review synthesizes current knowledge on IIA epidemiology, pathophysiology, diagnostic strategies, and treatment modalities.
  • It examines common irritant agents, including fumes, gases, aerosols, and dusts like chlorine, nitrogen oxides, and solvents.
  • Diagnostic criteria for definite IIA involve clinical history, reversible airflow limitation, and bronchial hyperresponsiveness.

Key Points:

  • Common irritants include chlorine, nitrogen oxides, sulfur dioxide, ammonia, acetic acid, solvents, and cleaning agents.
  • Diagnosis of definite IIA relies on clinical history and objective measures of airflow limitation or hyperresponsiveness.
  • Distinguishing possible IIA is challenging due to difficulties in establishing a clear exposure-symptom relationship.

Conclusions:

  • IIA represents a significant occupational respiratory disease requiring accurate diagnosis and management.
  • Further research may improve diagnostic certainty for possible IIA cases.
  • Understanding IIA's triggers and mechanisms is crucial for prevention and treatment in affected individuals.