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Related Concept Videos

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 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-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: 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.
Antiasthma Drugs: β2-Adrenoceptor Agonists01:25

Antiasthma Drugs: β2-Adrenoceptor Agonists

Bronchodilators are critical in managing asthma, a chronic respiratory condition characterized by airway constriction due to inflammation and hyper-reactivity. Specifically, bronchodilators ease this constriction by relaxing the bronchial muscles, facilitating easier breathing.
One class of bronchodilators includes β2-adrenoceptor agonists. These agents target the β2-adrenoceptors located on bronchial smooth muscle cells. By stimulating these receptors, β2-agonists induce relaxation in these...

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A Reversible, Non-invasive Method for Airway Resistance Measurements and Bronchoalveolar Lavage Fluid Sampling in Mice
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[A study on the correlation between exercise-induced bronchoconstriction and atopy].

Xin Chen1, Mei-ying Zeng, Yong Li

  • 1Department of Respiratory Medicine, China-Japan Friendship Hospital, Beijing, China.

Zhonghua Jie He He Hu Xi Za Zhi = Zhonghua Jiehe He Huxi Zazhi = Chinese Journal of Tuberculosis and Respiratory Diseases
|July 12, 2012
PubMed
Summary
This summary is machine-generated.

This study found no link between atopy and exercise-induced bronchoconstriction (EIB) in students. Most students diagnosed with EIB did not show airway hyperreactivity.

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Area of Science:

  • Allergy and Immunology
  • Respiratory Medicine
  • Pediatric Pulmonology

Context:

  • Exercise-induced bronchoconstriction (EIB) is a common condition affecting athletes and students.
  • Atopy, characterized by a predisposition to allergic diseases, is often considered a risk factor for asthma and related conditions.
  • The relationship between EIB and atopy requires further investigation to understand underlying mechanisms and potential co-occurrence.

Purpose:

  • To determine the correlation between exercise-induced bronchoconstriction (EIB) and atopy in a student population.
  • To assess the prevalence of atopy markers, including serum total IgE levels and skin allergen test results, in students with and without EIB.
  • To evaluate the presence of airway hyperreactivity in students diagnosed with EIB.

Summary:

  • A screening test identified 89 out of 773 students with EIB (11.5%).
  • Serum total IgE levels and skin allergen tests did not show a significant correlation with EIB.
  • Bronchial provocation tests revealed airway hyperreactivity in only one student with EIB, suggesting it is not a universal finding.

Impact:

  • The findings suggest that atopy may not be a significant predictor of exercise-induced bronchoconstriction in this student cohort.
  • The study highlights that airway hyperreactivity is not consistently present in all students diagnosed with EIB.
  • These results contribute to a better understanding of the heterogeneity of EIB and its potential lack of association with allergic sensitization.