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Related Concept Videos

Asthma-I: Introduction01:29

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 Manifestations01:13

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: Introduction01:28

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 Classification01:26

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 Complications01:24

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 Management01:20

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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Bronchial Thermoplasty: A Novel Therapeutic Approach to Severe Asthma
14:39

Bronchial Thermoplasty: A Novel Therapeutic Approach to Severe Asthma

Published on: November 4, 2010

Occupational asthma.

Nicholas J Kenyon1, Brian M Morrissey, Michael Schivo

  • 1Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of California, Davis, 4150 V. Street, Sacramento, CA 95817, USA. njkenyon@ucdavis.edu

Clinical Reviews in Allergy & Immunology
|May 17, 2011
PubMed
Summary
This summary is machine-generated.

Occupational asthma, a common lung disease, is linked to workplace exposures. Diagnosis often relies on clinical assessment, with specific IgE tests not always indicative for low molecular weight agents.

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Area of Science:

  • Occupational medicine
  • Pulmonology
  • Immunology

Background:

  • Occupational asthma is the leading occupational lung disease.
  • Work-aggravated asthma and occupational asthma are workplace-related conditions.
  • Reactive airways dysfunction syndrome is a distinct subtype of occupational asthma.

Purpose of the Study:

  • To review the diagnosis and mechanisms of occupational asthma.
  • To highlight common causative agents and diagnostic challenges.

Main Methods:

  • Clinical diagnosis is the primary method.
  • Specific inhalation challenge, the gold standard, is infrequently utilized.
  • Review of common low molecular weight isocyanate exposures.

Main Results:

  • Low molecular weight isocyanates are frequent causes of occupational asthma.
  • Elevated specific IgE levels are not consistently observed in affected workers.
  • Improvement after workplace removal is not universal.

Conclusions:

  • Occupational asthma diagnosis relies heavily on clinical evaluation.
  • Understanding causative agents like isocyanates is crucial.
  • Further research into mechanisms and treatment is warranted.