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Related Concept Videos

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 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-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: 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.
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:

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Related Experiment Video

Updated: May 23, 2026

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

What is severe asthma?

J D Blakey1, A J Wardlaw

  • 1Department of Respiratory Medicine, University of Nottingham, Nottingham, UK. john.blakey@nottingham.ac.uk

Clinical and Experimental Allergy : Journal of the British Society for Allergy and Clinical Immunology
|April 21, 2012
PubMed
Summary
This summary is machine-generated.

Defining severe asthma is challenging due to its complexity and lack of a distinct phenotype. Researchers suggest using specific classifiers for symptoms, pathophysiology, or service provision instead of a single definition.

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Asthma Detection Research Based on Voice Signal Processing and Machine Learning
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Asthma Detection Research Based on Voice Signal Processing and Machine Learning

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Last Updated: May 23, 2026

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

Asthma Detection Research Based on Voice Signal Processing and Machine Learning
04:04

Asthma Detection Research Based on Voice Signal Processing and Machine Learning

Published on: July 22, 2025

Area of Science:

  • Pulmonology
  • Clinical Medicine
  • Respiratory Research

Background:

  • Asthma affects many individuals, with some experiencing severe disease.
  • Defining 'severe asthma' is crucial for research and clinical management.
  • Existing challenges include defining asthma itself and identifying a distinct severe phenotype.

Purpose of the Study:

  • To review the rationale and historical attempts at defining severe asthma.
  • To highlight the difficulties in distinguishing asthma control from severity.
  • To address the heterogeneity and potential misclassification within severe asthma phenotypes.

Main Methods:

  • Literature review of existing definitions and classification attempts for severe asthma.
  • Analysis of the challenges in phenotype identification and classification.
  • Discussion of the interplay between asthma control and severity.

Main Results:

  • Defining severe asthma is problematic due to inherent complexities and lack of a distinct phenotype.
  • Attempts to define severe asthma have faced significant challenges, including phenotype heterogeneity.
  • Disentangling asthma control from severity remains a key difficulty.

Conclusions:

  • A singular, universally accepted definition for severe asthma is problematic and likely unattainable.
  • An alternative strategy involves using specific classifiers tailored to symptoms, pathophysiology, or service needs.
  • Future efforts should focus on targeted classification rather than a monolithic definition.