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Related Concept Videos

Pleural Effusion I: Introduction01:25

Pleural Effusion I: Introduction

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 criteria,...
Pleural Effusion II: Symptoms and Management01:28

Pleural Effusion II: Symptoms and Management

Pleural Effusion Overview
A pleural effusion is the abnormal collection of fluid between the parietal and visceral pleura layers of tissue that form the lining of the lungs and chest cavity. It can occur independently or due to surrounding parenchymal diseases, such as infection, malignancy, or inflammatory conditions.
Clinical Manifestations:
Pleural Disorders: Types and Brief Description01:30

Pleural Disorders: Types and Brief Description

The pleura is a vital part of the respiratory system. It's a double-layered membrane surrounding the lungs and lining the chest cavity. The two layers of the pleura are:
Pneumothorax-II01:27

Pneumothorax-II

Pneumothorax is a medical condition defined by the buildup of air in the pleural space between the lungs and the chest wall. This accumulation of air can lead to partial or complete lung collapse, resulting in a range of clinical manifestations. Understanding the clinical presentation and effective management strategies is crucial for healthcare professionals in providing timely and appropriate care to individuals with pneumothorax.
Clinical Manifestations:
Pleura of the Lungs01:13

Pleura of the Lungs

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...
Pneumothorax II: Pathophysiology01:08

Pneumothorax II: Pathophysiology

Pneumothorax means the presence of air in the pleural space — the thin potential gap between the visceral and parietal pleura. This condition disrupts the normal pressure balance that keeps the lungs inflated, leading to partial or complete collapse of the affected lung.Normal physiologyUnder normal conditions, the pleural space maintains a slightly negative intrapleural pressure, which keeps the lungs expanded against the chest wall. This negative pressure creates a delicate balance between...

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Related Experiment Video

Updated: May 12, 2026

Point-of-Care Lung Ultrasound in Adults: Image Acquisition
09:17

Point-of-Care Lung Ultrasound in Adults: Image Acquisition

Published on: March 3, 2023

Black pleural effusion.

Takeshi Saraya1, Richard W Light, Hajime Takizawa

  • 1Department of Respiratory Medicine, Kyorin University School of Medicine, Mitaka City, Tokyo, Japan. sara@yd5.so-net.ne.jp

The American Journal of Medicine
|April 18, 2013
PubMed
Summary
This summary is machine-generated.

Black pleural effusions are rare but can be classified into four main categories: infection, malignancy, hemorrhage, and other causes. This classification aids in understanding the underlying pathophysiological mechanisms of this unusual clinical presentation.

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International Expert Consensus and Recommendations for Neonatal Pneumothorax Ultrasound Diagnosis and Ultrasound-guided Thoracentesis Procedure
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A Pleural Effusion Model in Rats by Intratracheal Instillation of Polyacrylate/Nanosilica
03:32

A Pleural Effusion Model in Rats by Intratracheal Instillation of Polyacrylate/Nanosilica

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Related Experiment Videos

Last Updated: May 12, 2026

Point-of-Care Lung Ultrasound in Adults: Image Acquisition
09:17

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Published on: March 3, 2023

International Expert Consensus and Recommendations for Neonatal Pneumothorax Ultrasound Diagnosis and Ultrasound-guided Thoracentesis Procedure
05:50

International Expert Consensus and Recommendations for Neonatal Pneumothorax Ultrasound Diagnosis and Ultrasound-guided Thoracentesis Procedure

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A Pleural Effusion Model in Rats by Intratracheal Instillation of Polyacrylate/Nanosilica
03:32

A Pleural Effusion Model in Rats by Intratracheal Instillation of Polyacrylate/Nanosilica

Published on: April 12, 2019

Area of Science:

  • Pulmonology
  • Pathophysiology
  • Medical Diagnostics

Background:

  • Black pleural effusion is a rare clinical finding.
  • Previous literature lacks focused reviews on this condition.
  • Reported causes include infection, malignancy, and hemorrhage.

Purpose of the Study:

  • To classify diseases causing black pleural effusion.
  • To characterize these diseases based on pathophysiological mechanisms.

Main Methods:

  • Systematic search of the medical literature.
  • Utilized PubMed database for case identification.
  • Reviewed identified reports of black pleural effusion.

Main Results:

  • Identified and analyzed 8 cases of black pleural effusion.
  • Classified underlying causes into 4 pathophysiological categories: infection, malignant melanoma, hemorrhage/hemolysis, and other (e.g., charcoal empyema).
  • Differentiated from similar-colored effusions like biliopleural and pancreatico-pleural fistulas using specific pleural fluid markers.

Conclusions:

  • Black pleural effusions can be categorized into four primary groups based on pathophysiology.
  • Understanding these categories aids in diagnosis and management.