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Related Concept Videos

Pneumonia I: Introduction01:30

Pneumonia I: Introduction

217
Pneumonia is an acute respiratory infection that targets the lungs, specifically the alveoli. These tiny air sacs, essential for oxygen exchange, become engorged with pus and fluid, severely hindering breathing, decreasing oxygen absorption, and causing significant pain and discomfort during respiration.
Risk Factors
Various factors influence the likelihood of developing pneumonia. Age plays a crucial role, with infants, children under two, and individuals over 65 at increased risk due to their...
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Pneumonia II: Pathophysiology01:29

Pneumonia II: Pathophysiology

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The pathophysiology of pneumonia involves the following steps:
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Pneumonia III: Complications and Assessment01:30

Pneumonia III: Complications and Assessment

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Pneumonia poses the potential for numerous complications that warrant consideration. These complications include the following:
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Pulmonary Tuberculosis II01:28

Pulmonary Tuberculosis II

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Tuberculosis, or TB, is a bacterial infectious disease caused by Mycobacterium tuberculosis. While its primary impact is on the lungs, leading to pulmonary tuberculosis, it can also affect various other organs, a condition referred to as extrapulmonary tuberculosis.
Here is a detailed explanation of its pathophysiology:
Transmission: The process begins when a person inhales droplet nuclei containing M. tuberculosis. These are typically released into the air when an individual with pulmonary or...
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Pulmonary Tuberculosis III01:31

Pulmonary Tuberculosis III

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Tuberculosis (TB) is a contagious infection primarily affecting the lung parenchyma but which can also affect other body parts. TB can be classified based on disease development, presentation, and the affected anatomical site.
The first classification is based on the development of the disease, and it includes the following categories:
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Pleural Effusion I: Introduction01:25

Pleural Effusion I: Introduction

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Pleural effusion is an abnormal fluid accumulation in the pleural cavity, a narrow space between the lungs and the chest wall. It is not a disease per se but rather a symptom or indication of an underlying disease. In normal circumstances, this space contains a small amount of fluid (5 to 15 mL), a lubricant facilitating the non-frictional movement of the pleural surfaces.
There are two main types of pleural effusion: transudative and exudative. They are differentiated using Light's...
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Updated: Jun 18, 2025

Bronchoalveolar Lavage Exosomes in Lipopolysaccharide-induced Septic Lung Injury
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Case 327: Exogenous Lipoid Pneumonia.

Maxens Decavèle1, Jérémie Pichon1, Anne Fajac1

  • 1From the Intensive Care and Resuscitation Unit (M.D., J.P., A.G., A.P., M.F.), Department of Pathological Anatomy and Cytology, Section of Oncology, Pathology and Molecular Biology (A.F., M.A.), Department of Radiology (A.M.), and Department of Pneumology and Thoracic Oncology and GRC-04 Theranoscan (A.P.), Groupe Hospitalier Universitaire APHP-Sorbonne Université, Hôpital Tenon, Paris, France; Department of Experimental and Clinical Respiratory Neurophysiology (UMRS 1158), INSERM, Sorbonne Université, Paris, France (M.D.); and Intensive Care and Resuscitation Unit (R3S), Groupe Hospitalier Universitaire APHP-Sorbonne Université, site Pitié-Salpêtrière, 47-83 Boulevard de l'Hôpital, 75013 Paris, France (M.D., J.P.).

Radiology
|July 30, 2024
PubMed
Summary
This summary is machine-generated.

A 58-year-old male smoker experienced severe hypercapnic respiratory failure with persistent lung opacities. Investigations included advanced imaging like PET/CT for diagnosis.

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Area of Science:

  • Pulmonology
  • Critical Care Medicine
  • Radiology

Background:

  • A 58-year-old male with a history of smoking, obesity, and chronic renal insufficiency presented with severe hypercapnic acute respiratory failure.
  • He experienced worsening chronic dyspnea over six months, requiring two intensive care unit (ICU) admissions within three months for persistent bilateral lung opacities.

Observation:

  • The patient presented with signs of respiratory failure including wheezing and active abdominal expiration, alongside bilateral pulmonary crackles.
  • Blood gas analysis revealed severe respiratory acidosis (pH 7.15, PaCO2 102 mm Hg) despite oxygen therapy, indicating significant respiratory compromise.

Findings:

  • Diagnostic imaging included chest CT, MRI, and 18F-fluorodeoxyglucose Positron Emission Tomography/Computed Tomography (FDG PET/CT) to investigate the persistent bilateral opacities.
  • The diagnostic workup aimed to identify the underlying cause of the refractory respiratory failure and lung abnormalities in this complex patient.

Implications:

  • This case highlights the diagnostic challenges in patients with severe respiratory failure and complex comorbidities.
  • Comprehensive imaging, including PET/CT, may be crucial for elucidating the etiology of unexplained pulmonary opacities and guiding management in critical care settings.