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Chronic Obstructive Pulmonary Disease III: Chronic Bronchitis Features

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...

The Bronchial Tree

The Bronchial Tree

The human bronchi and bronchial tree play a crucial role in the respiratory system, facilitating the exchange of oxygen and carbon dioxide. Let's delve into the intricate structure and functions of these respiratory components.
The trachea, commonly known as the windpipe, is a tube that connects the larynx (voice box) to the bronchi. At a point called the carina, it bifurcates into two primary bronchi. The right primary bronchus is wider, shorter, and more vertical than the left primary...

Pulmonary Cycle: Exhalation

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 I: Introduction

Chronic Obstructive Pulmonary Disease I: Introduction

Chronic obstructive pulmonary disease is a common, preventable, and treatable respiratory disorder characterized by persistent symptoms and progressive airflow limitation. This limitation results from a combination of small-airway disease (obstructive bronchiolitis) and parenchymal destruction (emphysema), both driven by chronic inflammation from exposure to harmful particles or gases.The disease includes two main pathological entities: emphysema, marked by destruction of alveolar walls and...

Chronic Obstructive Pulmonary Disease II: Emphysema

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.

Trachea

Trachea

The trachea, commonly known as the windpipe, is a vital part of the human respiratory system. It serves as a passageway for air to travel between the larynx and the bronchi, allowing oxygen to reach the lungs. Let's explore its anatomical features, dimensions, layers of the tracheal wall, associated muscles, and the functions of its parts.
Anatomical Features:
Location: About half of the trachea is situated in the neck, anterior to the esophagus, and extends from the larynx (at the level of the...

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Updated: Jun 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

Tracheobronchomalacia in children.

Ian Brent Masters¹, Anne Bernadette Chang

¹Respiratory Medicine, Queensland Children's Respiratory Centre RCH, Herston Road, Herston, Brisbane, Queensland 4029, Australia. brent_masters@health.qld.gov.au

Expert Review of Respiratory Medicine

|May 19, 2010

Summary

Tracheobronchomalacia diagnosis is challenging in pediatrics. Quantitative measurements, not subjective estimates, are crucial for managing these airway disorders and improving patient outcomes.

Area of Science:

Pediatric Pulmonology
Medical Diagnostics
Respiratory Medicine

Background:

Tracheobronchomalacia (TBM) presents significant diagnostic challenges in pediatric care.
Bronchoscopy is the gold standard for diagnosing TBM, but lesion size assessment is often subjective.
Current management relies on visual estimates, despite available quantitative measurement methods.

Purpose of the Study:

To highlight the need for quantitative assessment in TBM diagnosis and management.
To emphasize the variability in TBM presentation and its impact on clinical outcomes.
To advocate for further research into TBM definitions, clinical profiles, and treatment.

Main Methods:

Review of current diagnostic practices for tracheobronchomalacia.

Related Experiment Videos

Last Updated: Jun 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

Discussion of the limitations of subjective size estimation in bronchoscopy.

Identification of the need for quantitative measurement techniques.

Main Results:

TBM exhibits a wide spectrum of bronchoscopic appearances and clinical manifestations.
Mild TBM cases can present with worse clinical profiles than respiratory illnesses in healthy children.
Severe TBM often necessitates invasive interventions and intensive care.

Conclusions:

Accurate, quantitative assessment of TBM lesions is essential for effective management decisions.
Further research is required to define TBM subtypes and understand their natural history.
Randomized controlled trials and exploration of novel therapies, including gene therapy, are needed to advance pediatric respiratory medicine for TBM patients.