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Related Concept Videos

Chronic Obstructive Pulmonary Disease III: Chronic Bronchitis Features01:24

Chronic Obstructive Pulmonary Disease III: Chronic Bronchitis Features

Chronic bronchitis is a key phenotype of chronic obstructive pulmonary disease (COPD), characterized by airway-centered inflammation and mucus overproduction. It develops from long-term exposure to harmful particles or gases, most commonly cigarette smoke, which triggers a persistent inflammatory response.Cellular and Structural ChangesInflammation initially affects the large bronchi and later the smaller airways, with infiltration by immune cells, including neutrophils, macrophages, and...
Pulmonary Cycle: Exhalation01:17

Pulmonary Cycle: Exhalation

In terms of human respiration, the act of expelling air, known as exhalation (or expiration), operates on the principle of pressure gradients. During expiration, the pressure within the lungs exceeds that of the surrounding atmosphere. Under normal conditions, quiet breathing involves passive exhalation and is free of muscular contractions. This is because the exhalation process is driven by the natural elastic recoil of the lungs and chest wall, both of which have an inherent tendency to...
Chronic Obstructive Pulmonary Disease II: Emphysema01:23

Chronic Obstructive Pulmonary Disease II: Emphysema

Emphysema, a major phenotype of chronic obstructive pulmonary disease (COPD), is characterized by irreversible destruction of alveolar walls and permanent enlargement of distal airspaces. Unlike chronic bronchitis, which primarily affects the airways, emphysema predominantly involves the lung parenchyma, where structural damage leads to airflow limitation.PathophysiologyIt most commonly results from prolonged exposure to cigarette smoke and other toxic gases, particularly cigarette smoke.
Chronic Obstructive Pulmonary Disease IV: Clinical Manifestations01:19

Chronic Obstructive Pulmonary Disease IV: Clinical Manifestations

Chronic Obstructive Pulmonary Disease, or COPD, is a long-term condition marked by persistent and only partially reversible airflow limitation. It involves two overlapping conditions—chronic bronchitis and emphysema—which often co-appear but differ in dominant symptoms and underlying mechanisms.Chronic Bronchitis FeaturesChronic bronchitis presents with a persistent productive cough and thick, sometimes purulent mucus due to airway inflammation, enlarged mucus glands, and goblet cell...
Chronic Obstructive Pulmonary Disease-II: Pathophysiology01:20

Chronic Obstructive Pulmonary Disease-II: Pathophysiology

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
Other Pulmonary Disorders01:17

Other Pulmonary Disorders

Respiratory disorders encompass a range of conditions with varying levels of severity. Asthma, marked by chronic airway inflammation and hypersensitivity, is one such condition. It can lead to airway obstruction due to factors like bronchial spasms, mucosal edema, increased mucus secretion, or epithelial damage. Asthma triggers are diverse, ranging from allergens to emotional upset, and treatment focuses on both immediate relief through bronchodilators and long-term inflammation suppression.

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Related Experiment Video

Updated: Jun 14, 2026

Long Term Chronic Pseudomonas aeruginosa Airway Infection in Mice
15:43

Long Term Chronic Pseudomonas aeruginosa Airway Infection in Mice

Published on: March 17, 2014

Bronchiectasis.

Cylen Javidan-Nejad1, Sanjeev Bhalla

  • 1Section of Cardiothoracic Imaging, Mallinckrodt Institute of Radiology, Washington University School of Medicine, 510 South Kingshighway, St. Louis, MO, USA. javidanc@mir.wustl.edu

Thoracic Surgery Clinics
|April 10, 2010
PubMed
Summary
This summary is machine-generated.

Radiologists play a key role in detecting and characterizing bronchiectasis, an irreversible bronchial dilatation. A systematic radiologic approach, guided by location and underlying mechanisms, aids in accurate diagnosis and patient management.

Related Experiment Videos

Last Updated: Jun 14, 2026

Long Term Chronic Pseudomonas aeruginosa Airway Infection in Mice
15:43

Long Term Chronic Pseudomonas aeruginosa Airway Infection in Mice

Published on: March 17, 2014

Area of Science:

  • Pulmonary Medicine
  • Radiology
  • Medical Imaging

Background:

  • Bronchiectasis is irreversible bronchial dilatation with nonspecific symptoms like hemoptysis, cough, and hypoxia.
  • Radiologists are crucial for detecting and characterizing bronchiectasis, differentiating it from other conditions.
  • Accurate diagnosis and triage are essential to prevent disease progression.

Purpose of the Study:

  • To outline a logical radiologic approach for diagnosing bronchiectasis.
  • To emphasize the role of CT in initial assessment.
  • To correlate bronchiectasis patterns with underlying causes based on location.

Main Methods:

  • Utilizing computed tomography (CT) as the primary imaging modality.
  • Analyzing bronchiectasis based on development mechanisms: bronchial wall damage, endobronchial obstruction, and traction.
  • Correlating the location of bronchiectasis with potential underlying etiologies.

Main Results:

  • CT is fast and accurate for bronchiectasis detection.
  • Excluding endobronchial lesions or fibrosis allows location-based differential diagnosis.
  • Upper lobe predominance suggests cystic fibrosis (CF) or MAC infection; mid-upper lobe suggests allergic bronchopulmonary aspergillosis (ABPA) or hypersensitivity pneumonitis; lower lobe suggests recurrent infections or predisposing conditions.

Conclusions:

  • A systematic, location-based radiologic approach aids in diagnosing bronchiectasis.
  • Radiologists are integral to the pulmonary team for managing bronchiectasis.
  • Understanding the distribution and mechanisms of bronchiectasis improves diagnostic accuracy.