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Asthma-I: Introduction

Asthma-I: Introduction

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...

Asthma III: Clinical Manifestations

Asthma III: Clinical Manifestations

Asthma presents with a characteristic pattern of episodic respiratory symptoms that reflect underlying airway inflammation, bronchoconstriction, and mucus hypersecretion. Although severity varies among individuals, certain clinical manifestations are considered hallmarks of the disorder and often guide diagnosis and assessment.Respiratory SymptomsA persistent cough is one of the most common early features of asthma. It is frequently dry and tends to worsen at night or in the early morning,...

Asthma I: Introduction

Asthma I: Introduction

Asthma is a chronic inflammatory disorder of the airways characterized by variable airflow obstruction and heightened bronchial responsiveness to a wide range of triggers. The underlying inflammation leads to airway swelling, mucus hypersecretion, and smooth muscle constriction, all of which narrow the airway lumen and impede airflow. Clinically, asthma presents with recurrent episodes of wheezing, shortness of breath, chest tightness, and coughing, symptoms that typically vary in intensity and...

Asthma-II: Pathophysiology and Classification

Asthma-II: Pathophysiology and Classification

Asthma is a prevalent chronic respiratory condition marked by inflammation and hyperresponsiveness of the airways. Its pathophysiology involves complex interactions among inflammatory pathways, immune responses, and neural mechanisms.
Additionally, environmental and genetic factors play crucial roles in determining an individual's susceptibility to asthma and the severity of their condition.
Critical processes in asthma pathophysiology include:

Asthma-III: Symptoms and Complications

Asthma-III: Symptoms and Complications

Asthma, a common chronic respiratory condition, is classified considering the frequency and severity of symptoms alongside lung function impairment. Understanding this classification is essential for appropriate treatment and management. Here's a detailed look at the classification of asthma and its clinical features and complications:
Classification of Asthma

Asthma: Pathogenesis and Management

Asthma: Pathogenesis and Management

Asthma is a chronic pulmonary condition involving inflammation of the airways, hyper-reactivity, and reversible obstruction of the airways. This condition can significantly impact a person's quality of life, making breathing difficult and leading to distressing symptoms.
Asthma is classified as allergic and non-allergic. Allergens such as dust mites, pollen, and pet dander trigger allergic asthma, while factors like cold air, intense emotions, or exercise can induce non-allergic asthma.

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Related Experiment Video

Updated: May 17, 2026

Bronchial Thermoplasty: A Novel Therapeutic Approach to Severe Asthma

Bronchial Thermoplasty: A Novel Therapeutic Approach to Severe Asthma

Published on: November 4, 2010

Occupational asthma.

Joanna Szram¹, Paul Cullinan

¹Department of Occupational and Environmental Medicine, National Heart and Lung Institute, Imperial College, London, United Kingdom.

Seminars in Respiratory and Critical Care Medicine

|October 11, 2012

Summary

This summary is machine-generated.

Occupational asthma, affecting 1 in 10 adults, arises from workplace exposures. Early diagnosis and workplace changes are key to preventing and curing this potentially curable condition.

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Bronchial Thermoplasty: A Novel Therapeutic Approach to Severe Asthma

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Area of Science:

Occupational Medicine
Pulmonology
Environmental Health

Background:

Workplace environments contribute to approximately 10% of adult asthma cases, including new-onset, recurrent, or worsening disease.
Exposures can either exacerbate existing asthma (work-exacerbated asthma) or cause new allergic asthma (occupational asthma).
Over 350 airborne sensitizing agents, primarily proteins or reactive chemicals, are identified as asthmagens in the workplace.

Purpose of the Study:

To emphasize the importance of rapid and precise diagnosis of occupational asthma.
To highlight the role of identifying causative workplace exposures for effective management.
To underscore the potential for prevention and cure through workplace modifications.

Main Methods:

Diagnosis relies on a comprehensive medical history.
Immunological testing may be utilized where applicable.
Serial lung function measurements at work and home environments are crucial for detecting work-related variability.

Main Results:

Occupational asthma is linked to specific airborne sensitizing agents in the workplace.
Accurate diagnosis facilitates targeted workplace adaptations and improves patient function.
The majority of cases can be diagnosed using a combination of history, immunology, and objective lung function monitoring.

Conclusions:

Occupational asthma is a significant public health issue with a substantial impact on adult respiratory health.
Prompt identification of the causative agent and environmental modifications are paramount for successful treatment.
Effective management strategies focus on workplace interventions rather than solely on pharmacological treatments, offering potential for prevention and cure.