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Other Pulmonary Disorders

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.

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.

Pulmonary Function Tests

Pulmonary Function Tests

Pulmonary Function Tests (PFTs)
Pulmonary Function Tests are crucial diagnostic tools for assessing respiratory function, particularly in patients with chronic respiratory disorders. They comprehensively evaluate lung volumes, ventilatory function, breathing mechanics, diffusion, and gas exchange. These tests help diagnose pulmonary diseases and play a significant role in monitoring disease progression, evaluating disability, and assessing response to therapy.
PFTs involve using a spirometer, a...

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 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...

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...

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Related Experiment Video

Updated: Jun 8, 2026

Establishing a Silicosis Rat Model via Exposure of Whole-Body to Respirable Silica

Establishing a Silicosis Rat Model via Exposure of Whole-Body to Respirable Silica

Published on: October 28, 2022

[Lung function in children residentially exposed to asbestos].

Neven Pavlov¹, Irena Perić, Komelija Mise

¹Klinika za djedje bolesti, KBC Split. npavlov@kbsplit.hr

Arhiv Za Higijenu Rada I Toksikologiju

|September 22, 2010

Summary

This study found no significant changes in lung function tests for children exposed to asbestos. Long-term health effects of childhood asbestos exposure remain uncertain.

Related Experiment Videos

Last Updated: Jun 8, 2026

Establishing a Silicosis Rat Model via Exposure of Whole-Body to Respirable Silica

Establishing a Silicosis Rat Model via Exposure of Whole-Body to Respirable Silica

Published on: October 28, 2022

Area of Science:

Environmental Health
Pulmonology
Pediatrics

Context:

Air pollution significantly impacts respiratory health, necessitating sensitive indicators for evaluation.
Childhood exposure to environmental toxins like asbestos requires careful monitoring of lung function.
Assessing the long-term respiratory effects of low-level asbestos exposure in children is crucial.

Purpose:

To evaluate the impact of residential asbestos exposure on respiratory function in healthy children.
To compare spirometry results and lung transfer factor for carbon monoxide (TLCO) with established reference values.
To investigate potential early indicators of asbestos-related lung damage in pediatric populations.

Summary:

Spirometry results, including forced vital capacity (FVC), forced expiratory volume in 1 second (FEV1), and various forced expiratory flow rates, were compared between 81 healthy children exposed to asbestos and predicted normal values.
The transfer factor of the lungs for carbon monoxide (TLCO) was measured using the single-breath method and compared to reference values.
While a statistically significant difference in FVC was noted against Knudson's predicted values, it was not significant when expressed as a percentage. No significant differences were found for other spirometry parameters or TLCO.

Impact:

Current spirometry and TLCO measurements do not reveal significant respiratory impairment in children with low-level asbestos exposure.
The long latency period for asbestos-related diseases like cancer and fibrosis makes predicting long-term consequences of childhood exposure challenging.
Further longitudinal studies are needed to understand the chronic health implications of early-life asbestos exposure.