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Related Concept Videos

Atelectasis II: Pathophysiology01:10

Atelectasis II: Pathophysiology

Atelectasis develops when alveoli lose their air and collapse inward. Because lung tissue is naturally elastic, these air sacs shrink rather than remaining open. Collapsed alveoli are no longer ventilated, reducing their role in gas exchange. Blood flow may continue in these regions, creating a ventilation–perfusion mismatch. Clinical findings include decreased breath sounds, dullness to percussion, reduced chest expansion, and decreased tactile fremitus as sound transmission through collapsed...
Alveoli and Alveolar Ducts01:26

Alveoli and Alveolar Ducts

The respiratory zone of the human body, which stands in contrast to the conducting zone, comprises the structures that actively participate in the exchange of gases. The initiation of this zone is marked by the terminal bronchioles converging into respiratory bronchioles, the tiniest bronchiole classification. The respiratory bronchioles give way to the alveolar ducts that opens into a congregation of alveoli. Actively involved in gas exchange, alveoli resemble tiny sacs similar to clusters of...
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.
Acute Respiratory Failure-II01:21

Acute Respiratory Failure-II

Type I Respiratory Failure, or hypoxemic respiratory failure, occurs when the partial pressure of oxygen (PaO2) in arterial blood falls below 60 mmHg while breathing room air without a corresponding increase in arterial carbon dioxide levels (PaCO2). This condition highlights a significant impairment in the lungs' capacity to oxygenate the blood.
The underlying physiological abnormalities that contribute to hypoxemic respiratory failure include:

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Related Experiment Video

Updated: Jul 8, 2026

Visualizing Lung Cellular Adaptations during Combined Ozone and LPS Induced Murine Acute Lung Injury
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Visualizing Lung Cellular Adaptations during Combined Ozone and LPS Induced Murine Acute Lung Injury

Published on: March 21, 2021

[Acute lung injury and alveolar epithelial function].

Tokujiro Uchida1, Koshi Makita

  • 1Department of Anesthesiology, Graduate School of Medicne, Tokyo Medical and Dental University, Tokyo.

Masui. the Japanese Journal of Anesthesiology
|January 25, 2008
PubMed
Summary

Acute lung injury and acute respiratory distress syndrome remain challenging. Research progress in alveolar epithelium pathophysiology offers insights into injury, repair, and future therapeutic strategies.

Area of Science:

  • Pulmonary Medicine
  • Critical Care Medicine
  • Cell Biology

Background:

  • Acute lung injury/acute respiratory distress syndrome (ALI/ARDS) has been a clinical and research challenge for 40 years.
  • The pathophysiology of the alveolar epithelium is central to ALI/ARDS.
  • Understanding ALI/ARDS mechanisms is crucial for advancing patient care.

Purpose of the Study:

  • To review recent advancements in understanding ALI/ARDS pathophysiology.
  • To focus on the role of the alveolar epithelium in ALI/ARDS.
  • To identify potential future clinical and therapeutic strategies.

Main Methods:

  • Literature review of research on ALI/ARDS pathophysiology.
  • Analysis of studies focusing on alveolar epithelial injury and repair mechanisms.

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Bronchoalveolar Lavage Exosomes in Lipopolysaccharide-induced Septic Lung Injury
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  • Synthesis of findings to inform clinical evaluation and treatment.

    • Main Results:

    • Significant progress has been made in elucidating ALI/ARDS mechanisms over the past decades.
    • Key insights have emerged regarding alveolar epithelial cell injury and the subsequent repair processes.
    • Understanding these processes is vital for developing novel therapeutic interventions.

    Conclusions:

    • Continued research into alveolar epithelium pathophysiology is essential for improving ALI/ARDS management.
    • Translating research findings into clinical practice may lead to better severity assessment and treatment options.
    • Future strategies for ALI/ARDS will likely be informed by a deeper understanding of tissue-level mechanisms.