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Related Concept Videos

Asthma-I: Introduction01:29

Asthma-I: Introduction

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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...
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Chronic Obstructive Pulmonary Disease-II: Pathophysiology01:20

Chronic Obstructive Pulmonary Disease-II: Pathophysiology

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Chronic Obstructive Pulmonary Disease (COPD) pathophysiology is intricate and multifaceted, involving a complex interplay of physiological processes. Understanding these mechanisms is crucial for effectively managing and treating COPD. Here is an in-depth look at the critical elements in the pathophysiology of COPD:
Chronic Inflammation
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Asthma: Pathogenesis and Management01:20

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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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Asthma-II: Pathophysiology and Classification01:26

Asthma-II: Pathophysiology and Classification

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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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Asthma-III: Symptoms and Complications01:24

Asthma-III: Symptoms and Complications

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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
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Factors Affecting Pulmonary Ventilation01:19

Factors Affecting Pulmonary Ventilation

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Besides the pressure difference between the external environment and the lungs, the airflow rate and ease of pulmonary ventilation are also influenced by three other factors: surface tension of the fluid in the alveoli, compliance of the lungs, and airway resistance.
Alveolar Surface Tension
The alveolar fluid lines the luminal surface of the alveoli and exerts a force called surface tension. This force is caused by the polar water molecules in the liquid being more strongly attracted to each...
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Related Experiment Video

Updated: Mar 20, 2026

Generation of a Chronic Obstructive Pulmonary Disease Model in Mice by Repeated Ozone Exposure
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Indoor air quality and its impacts on asthma and COPD.

Tun Zan Maung1, Rose Aning2, Michael Newnham3

  • 1University of Birmingham, Birmingham, UK tunzanmaung2012@gmail.com.

BMJ Open Respiratory Research
|March 18, 2026
PubMed
Summary

Indoor air pollution, particularly particulate matter (PM), peaks during evening cooking hours. Human activities significantly impact indoor air quality, suggesting behavioral changes can improve it for those with respiratory conditions.

Keywords:
AsthmaEmphysemaPulmonary Disease, Chronic Obstructive

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Area of Science:

  • Environmental Health
  • Respiratory Medicine
  • Epidemiology

Background:

  • Indoor air pollution poses global health risks, yet peak exposure effects remain understudied.
  • Patients with respiratory diseases are particularly vulnerable to indoor air pollutants.

Purpose of the Study:

  • To monitor indoor air quality and associated symptoms in patients with asthma and COPD.
  • To identify peak pollutant concentrations and their timing, and assess their impact on respiratory symptoms.

Main Methods:

  • A 2-week cohort study involving 30 participants with asthma and COPD.
  • Statistical process control and notched box plots for analyzing particulate matter 2.5 (PM2.5) peaks.
  • Linear mixed-effects and autoregressive models to evaluate PM2.5's effect on symptoms.

Main Results:

  • 43.3% of participants experienced PM peaks between 6-9 pm, often at 7 pm, linked to cooking.
  • Participants averaged 4-6 peak pollutant periods exceeding WHO guidelines.
  • No significant association between PM2.5 and asthma symptoms, though a visual trend was noted. Smokers had higher pollutant levels.

Conclusions:

  • Human activities, like cooking, significantly affect indoor particulate matter levels.
  • Behavioral interventions targeting activities influencing indoor air quality could be beneficial.
  • Further research is needed to clarify the relationship between PM2.5 and respiratory symptoms in vulnerable populations.