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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-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: 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 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: 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.

Asthma-IV: Diagnostic and Management

Asthma-IV: Diagnostic and Management

The diagnosis and management of asthma are comprehensive, encompassing clinical assessments, lung function tests, and pharmacological interventions. Here's an overview:
Clinical Assessment for Asthma:
This is the first step in diagnosing and managing asthma. It includes:

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Updated: Jul 13, 2026

Bronchial Thermoplasty: A Novel Therapeutic Approach to Severe Asthma

Bronchial Thermoplasty: A Novel Therapeutic Approach to Severe Asthma

Published on: November 4, 2010

Understanding the September asthma epidemic.

Malcolm R Sears¹, Neil W Johnston

¹McMaster University, Hamilton, Ontario, Canada. searsm@mcmaster.ca

The Journal of Allergy and Clinical Immunology

|July 31, 2007

Summary

September asthma exacerbations in children are linked to returning to school and rhinovirus infections. Low medication use over summer may worsen these asthma episodes, but controller therapy can help.

Area of Science:

Pediatrics
Respiratory Medicine
Epidemiology

Background:

Childhood asthma shows a predictable rise in emergency visits and hospitalizations each September in North America.
This seasonal increase is strongly associated with the return to school.

Purpose of the Study:

To investigate the triggers and contributing factors behind the September asthma epidemic in children.
To explore potential interventions to mitigate this seasonal rise in asthma morbidity.

Main Methods:

Observational analysis of emergency department visits, hospital admissions, and physician consultations for childhood asthma.
Correlation analysis between school return dates, rhinovirus infection prevalence, and asthma exacerbation rates.
Review of medication usage patterns during summer months.

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Last Updated: Jul 13, 2026

Bronchial Thermoplasty: A Novel Therapeutic Approach to Severe Asthma

Bronchial Thermoplasty: A Novel Therapeutic Approach to Severe Asthma

Published on: November 4, 2010

Main Results:

A significant increase in asthma-related healthcare utilization occurs in September, coinciding with school resumption.
Rhinovirus infection is identified as a primary trigger for asthma exacerbations in school-aged children.
Lower asthma medication adherence during summer months appears to contribute to the epidemic's severity.

Conclusions:

The September asthma epidemic is a multifactorial event driven by school return and viral infections, exacerbated by reduced medication use.
Targeted interventions, including short-term controller therapy, may effectively attenuate this predictable surge in childhood asthma.
Further research into adherence barriers and optimal preventive strategies during summer is warranted.