Definition

1. Noun:
   • The process of passing through a membrane or tissue: "transudation" refers to the slow movement of fluid, typically from blood vessels, through pores or small openings in a membrane, without causing damage to the cells.
   • The fluid that has passed through: "transudation" can also refer to the substance itself that has oozed or filtered through.

Usage

• As a process:
  • The transudation of plasma into the interstitial space is a normal physiological process.
  • Edema can result from increased transudation of fluid from capillaries.
• As a substance:
  • The clear fluid on the surface of the blister was a transudation.
  • Analysis of the transudation revealed a low protein content.

Advanced Usage

• Medical/Physiological Context: The term is primarily used in medical, biological, and physiological contexts to describe non-inflammatory fluid movement, often contrasted with "exudation," which involves inflammation and higher protein content.
  • The distinction between a transudate and an exudate is crucial for diagnosing the cause of pleural effusion.

Variants and Related Words

• Transude (verb): To pass or ooze through pores or interstices.
  • Fluid can transude through the capillary walls.
• Transudate (noun): The fluid product of transudation.
  • A transudate is typically clear and has low cellular content.

Synonyms

• Oozing: The process of slowly leaking out.
• Seepage: The slow escape of a liquid through porous material.
• Filtration: The process of passing a liquid through a filter; in physiology, it can describe a similar passive process.

Antonyms

• Exudation: The process of discharging fluid, often with high protein and cell content, typically associated with inflammation.
• Absorption: The process of taking in or soaking up a substance.

Related Phrases/Concepts

• Capillary filtration: A closely related physiological process describing fluid movement across capillary walls due to hydrostatic and osmotic pressures, often resulting in transudation.
• Hydrostatic pressure: A primary force driving the transudation of fluid from blood vessels.

Noun

1. the process of exuding; the slow escape of liquids from blood vessels through pores or breaks in the cell membranes
2. a substance that transudes