Related Experiment Video
Updated: May 27, 2026
09:58
A Reversible, Non-invasive Method for Airway Resistance Measurements and Bronchoalveolar Lavage Fluid Sampling in Mice
Published on: April 13, 2010
Irreversible airway obstruction in asthma.
1Centre de Pneumologie, Hôpital Laval, Québec, Québec, Canada. lpboulet@med.ulaval.ca
Current Allergy and Asthma Reports
|February 13, 2009
Summary
Many asthma patients experience incomplete reversibility of airway obstruction (IRAO) due to inflammation and structural changes. Early intervention and optimal asthma control are crucial to prevent worsening lung function and IRAO.
Area of Science:
- Pulmonology
- Respiratory Medicine
- Clinical Immunology
Background:
- Asthma is typically defined by reversible airway obstruction.
- A notable subset of asthma patients exhibits incomplete reversibility of airway obstruction (IRAO) even with optimal management.
- This irreversibility may stem from persistent airway inflammation, particularly eosinophilic, and structural airway remodeling.
Purpose of the Study:
- To explore the characteristics and risk factors associated with incomplete reversibility of airway obstruction (IRAO) in asthma.
- To understand the implications of IRAO on asthma severity and patient outcomes.
Main Methods:
- This study reviews existing literature on asthma, focusing on airway obstruction reversibility.
- Analysis of risk factors, clinical presentation, and prognostic indicators of IRAO was performed.
Main Results:
- Key risk factors for IRAO include early-life reduced pulmonary function, frequent exacerbations, smoking, ongoing allergen exposure, and adult-onset asthma.
- IRAO is linked to more severe asthma, increased morbidity, and higher mortality rates.
Conclusions:
- IRAO in asthma is associated with significant clinical consequences.
- Strategies to mitigate IRAO include preventing exacerbations, smoking cessation, and consistent anti-inflammatory treatment to preserve lung function.
Related Concept Videos
01:20Asthma: 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 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.
01:29Asthma-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...
01:26Asthma-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:
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:
01:24Asthma-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
Classification of Asthma
01:28Asthma 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...
01:13Asthma 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,...