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Related Concept Videos

Other Pulmonary Disorders01:17

Other Pulmonary Disorders

1.4K
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.
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Pleura of the Lungs01:13

Pleura of the Lungs

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The lungs are nestled in a cavity, shielded by the pleura. The pleura, a form of serous membrane, wraps around each lung. This membrane arrangement consists of two layers: the visceral and parietal pleurae. The visceral pleura lines the surface of the lungIn contrast, the parietal pleura is the outer layer and contacts to the thoracic wall, the mediastinum, and the diaphragm. The hilum is the point of connection between the visceral and parietal layers. The space between the parietal and...
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Pulmonary Cycle: Exhalation01:17

Pulmonary Cycle: Exhalation

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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...
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Breathing01:05

Breathing

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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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Lung Capacity01:47

Lung Capacity

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The air in the lungs is measured in volumes and capacities. Lung volume measures reflect the amount of air taken in, released, or left over after a lung function, like a single inhalation. Lung capacity measures are sums of two or more lung volume measures.
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Chronic Obstructive Pulmonary Disease01:22

Chronic Obstructive Pulmonary Disease

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COPD is defined as a heterogeneous lung condition marked by persistent respiratory symptoms such as dyspnea, cough, and sputum production, caused by abnormalities in the airways that cause airflow obstruction.
Smoking is a primary risk factor for COPD, with over 80% of patients having a history of it. Patients typically experience progressive dyspnea or labored breathing, frequent coughing, and recurrent pulmonary infections. Many eventually succumb to respiratory failure, characterized by...
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Evaluating Regional Pulmonary Deposition using Patient-Specific 3D Printed Lung Models
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Evaluating Regional Pulmonary Deposition using Patient-Specific 3D Printed Lung Models

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Feather duvet lung.

Patrick Liu-Shiu-Cheong1, Chris RuiWen Kuo2, Struan Wa Wilkie3

  • 1Respiratory Medicine, Victoria Hospital, Kirkcaldy, UK.

BMJ Case Reports
|November 20, 2019
PubMed
Summary
This summary is machine-generated.

Hypersensitivity pneumonitis can be caused by feather bedding. Promptly identifying and removing the antigen source, alongside medical treatment, improved patient symptoms and lung function.

Keywords:
interstitial lung diseaserespiratory medicine

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Area of Science:

  • Pulmonology
  • Immunology
  • Environmental Medicine

Background:

  • Hypersensitivity pneumonitis (HP) is an immune-mediated lung disease caused by inhaled antigens.
  • Identifying the specific antigen is crucial for effective management and preventing disease progression.

Observation:

  • A 43-year-old non-smoker presented with unexplained malaise, fatigue, and breathlessness.
  • Diagnostic workup revealed positive avian precipitins, a restrictive lung function pattern, and ground-glass opacities on CT scan, consistent with HP.

Findings:

  • The patient's symptoms and lung function improved significantly after removing feather-filled bedding, implicating it as the antigen source.
  • Oral corticosteroid therapy was initiated, contributing to the patient's recovery.

Implications:

  • This case highlights the importance of a detailed occupational and environmental exposure history, including domestic bedding, in diagnosing HP.
  • Early antigen recognition and removal are vital to prevent chronic lung changes and irreversible fibrosis.