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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:
Endoscopic Studies II: Thoracocentesis01:26

Endoscopic Studies II: Thoracocentesis

Thoracentesis(Thoracocentesis), commonly known as pleural tap, is a medical procedure where a 22 gauge needle is inserted into the pleural space, the area between the lung and chest wall. This procedure is commonly performed to diagnose or treat various respiratory disorders.
Description
Excess pleural fluid or air may accumulate in some respiratory disorders in the thoracic cavity. To treat pleural effusion, a physician conducts thoracentesis by carefully piercing the chest wall and entering...
Inflammatory Response II: Inflammatory Exudate and Tissue Repair01:24

Inflammatory Response II: Inflammatory Exudate and Tissue Repair

The immune system's inflammatory response destroys the invading pathogen, permitting the tissue to heal. The changes during the cellular and vascular stages allow exudate formation at the site of inflammation. The inflammatory exudate released from the wound has high protein content and a specific gravity above 1.020.
The typical wound exudate is odorless, transparent, straw-colored, thin, and watery. Exudate, however, can differ depending on the state of wound healing. Likewise, the exudate's...
Sputum Studies I: Gram Stain, cytology, and Acid-fast smear and culture01:26

Sputum Studies I: Gram Stain, cytology, and Acid-fast smear and culture

Sputum studies are a critical part of diagnosing and treating numerous respiratory conditions. These studies involve obtaining sputum samples for analysis to identify pathogenic organisms and assess the presence of abnormal cells indicative of malignant conditions. This lesson will delve into three fundamental sputum studies: Gram Stain, Cytology, and Acid-fast Smear and Culture.
Gram Stain
The Gram Stain is an integral part of sputum studies. It involves the staining of sputum, which permits...
Exocrine Glands: Methods of Secretion01:08

Exocrine Glands: Methods of Secretion

Exocrine glands are those that release their secretions through ducts. Based on their mode of secretion, they can be classified into merocrine, apocrine, and holocrine.
Merocrine Secretion
Merocrine secretion is the most common type of exocrine secretion. The secretions are enclosed in vesicles and moved to the cell's apical surface, where the contents are released by exocytosis. For example, mucous, a watery secretion rich in the glycoprotein mucin, is a merocrine secretion. The eccrine glands...

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Eye complications in diabetes from the standpoint of the internist.

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[Operative treatment of suppurative complications of the pleural cavity following perforating wounds of the thorax].

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Related Experiment Video

Updated: Jun 19, 2026

Nasolacrimal Lavage as a Treatment for Ocular Surface Toxic Soup Syndrome
03:40

Nasolacrimal Lavage as a Treatment for Ocular Surface Toxic Soup Syndrome

Published on: April 25, 2025

STUDIES ON THE CHEMISTRY OF SEROUS EFFUSIONS.

A A Epstein1

  • 1Laboratory of Physiological Chemistry of the Pathological Department of the Mt. Sinai Hospital, New York.

The Journal of Experimental Medicine
|October 30, 2009
PubMed
Summary

Effusion composition varies by location and disease. Subcutaneous effusions have low protein, while pleural fluids have higher protein content, differing based on the underlying condition.

Area of Science:

  • Biochemistry
  • Pathology
  • Clinical Chemistry

Background:

  • Body fluid effusions are complex and their biochemical composition varies.
  • Understanding these variations is crucial for diagnosis and disease monitoring.

Purpose of the Study:

  • To compare the biochemical composition of different types of effusions.
  • To correlate effusion composition with specific diseases and fluid locations.

Main Methods:

  • Analysis of protein content, globulin-albumin ratios, chloride levels, and incoagulable nitrogen in various effusions.
  • Comparison of effusion analysis results with blood serum analysis from corresponding cases.

Main Results:

  • Subcutaneous effusions show low protein and high globulin content.

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  • Pleural effusions have higher protein content, approaching blood serum levels.
  • Abdominal effusions vary, with cardiac effusions showing high protein but lower globulin-albumin ratios than pleural fluids.
  • Chloride content and globulin-albumin ratios differ significantly based on effusion origin (e.g., inflammatory vs. non-inflammatory, nephritic vs. cardiac).
  • Conclusions:

    • Effusion composition is a significant indicator of fluid location and underlying disease pathology.
    • Biochemical markers in effusions provide valuable diagnostic information.
    • Further research into the role of specific components like leukocytes in effusion composition is warranted.