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Related Concept Videos

Chronic Obstructive Pulmonary Disease II: Emphysema01:23

Chronic Obstructive Pulmonary Disease II: Emphysema

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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.
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Chronic Obstructive Pulmonary Disease-II: Pathophysiology01:20

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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:
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Pulmonary Edema II: Pathophysiology01:18

Pulmonary Edema II: Pathophysiology

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Pulmonary edema is the accumulation of fluid in the interstitial and alveolar spaces of the lungs, impairing gas exchange and oxygen delivery. It may be cardiogenic or noncardiogenic, but both reduce oxygenation and lung compliance.Cardiogenic Pulmonary EdemaCardiogenic edema results from increased hydrostatic pressure in pulmonary capillaries, usually due to left ventricular dysfunction from myocardial infarction, heart failure, or valvular disease. Ineffective cardiac pumping causes blood to...
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Atelectasis II: Pathophysiology01:10

Atelectasis II: Pathophysiology

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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...
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Breathing01:05

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The process of breathing, inhaling and exhaling, involves the coordinated movement of the chest wall, the lungs, and the muscles that move them. Two muscle groups with important roles in breathing are the diaphragm, located directly below the lungs, and the intercostal muscles, which lie between the ribs. When the diaphragm contracts, it moves downward, increasing the volume of the thoracic cavity and creating more room for the lungs to expand. When the intercostal muscles contract, the ribs...
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Atypical Pneumonia01:14

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Atypical pneumonia, often caused by Mycoplasma pneumoniae, is a form of pulmonary infection that differs from the classical presentation of bacterial pneumonia in both its cause and clinical symptoms. Mycoplasma pneumoniae is a pleomorphic bacterium notable for its lack of a rigid cell wall. This structural characteristic imparts resistance to beta-lactam antibiotics and significantly influences the bacterium’s behavior within the human host.Other pathogens responsible for the disease...
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Related Experiment Video

Updated: Apr 19, 2026

Development of a Neonatal Piglet Acute Lung Injury Model Recreating the Early Environment of Preterm Infant Lungs
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[Pulmonary alveolar proteinosis].

S Jouneau1, M Kerjouan2, E Briens3

  • 1Service de pneumologie, centre de compétences des maladies pulmonaires rares de Bretagne, hôpital Pontchaillou, 2, rue Henri-Le-Guilloux, 35033 Rennes cedex, France; IRSET UMR 1085, université Rennes 1, 35043 Rennes, France.

Revue Des Maladies Respiratoires
|December 16, 2014
PubMed
Summary

Alveolar proteinosis (AP) is a rare lung disease where surfactant builds up in the alveoli. Diagnosis involves CT scans and lavage, with treatments ranging from whole lung lavage to GM-CSF therapy for refractory cases.

Keywords:
Grand lavage pulmonaireGranulocyte-macrophage colony-stimulating factorProtéinose alvéolaire pulmonairePulmonary alveolar proteinosisRituximabSurfactantWhole lung lavage

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Area of Science:

  • Pulmonology
  • Rare Diseases
  • Immunology

Context:

  • Alveolar proteinosis (AP) is a rare lung condition characterized by surfactant accumulation in alveoli, impairing gas exchange.
  • AP presents in three forms: autoimmune (anti-GM-CSF antibodies), secondary (hematologic diseases, toxins, infections), and genetic (primarily in children).
  • Diagnosis is suggested by CT scans showing interstitial lung disease with a 'crazy paving' pattern and confirmed by bronchoalveolar lavage.

Purpose:

  • To outline the classification, diagnosis, and management of alveolar proteinosis.
  • To highlight diagnostic criteria including imaging and lavage findings.
  • To discuss current and emerging therapeutic strategies for AP.

Summary:

  • AP involves alveolar surfactant buildup, classified into autoimmune, secondary, and genetic types.
  • Diagnosis relies on CT scans and bronchoalveolar lavage; positive anti-GM-CSF antibodies suggest autoimmune etiology.
  • Management includes whole lung lavage, with options like GM-CSF supplementation or rituximab for refractory cases.

Impact:

  • Provides a comprehensive overview of alveolar proteinosis for clinicians and researchers.
  • Emphasizes the importance of identifying the specific AP subtype for targeted treatment.
  • Highlights the unpredictable clinical course and potential for spontaneous improvement, with a generally favorable 5-year survival rate of 95%.