eschar

/'eskɑ:/

Thân thiện

A doctor examines the eschar on a patient's forearm.

Definition

1. Noun:
   • A dry, dark scab or slough: An eschar is a piece of dead tissue, often black or brown, that separates from healthy skin. It typically forms over a wound, especially after a burn, cauterization, gangrene, or certain infections.

Usage

• The term "eschar" is a medical term used primarily by healthcare professionals (doctors, nurses) to describe a specific type of wound covering.
• It is used to assess the severity and healing stage of a wound. The presence, size, and stability of an eschar are important clinical observations.
• Example Sentence:

Advanced Usage

• "Escharotomy": A surgical procedure involving an incision through an eschar. This is often done to relieve pressure when a circumferential eschar (one that goes all the way around a limb or the torso) restricts blood flow or breathing.
  • The patient underwent an escharotomy to treat compartment syndrome caused by the burn.

Variants and Related Words

• Escharotic (adjective): Describing a substance that causes the formation of an eschar by burning or corroding tissue.
  • Some historical treatments used escharotic agents, which are now considered dangerous.

Synonyms

• Scab: A more general, common term for a crust of dried blood and serum over a wound. An eschar is a specific, often thicker type of scab associated with deeper tissue damage.
• Slough: Dead tissue separating from living tissue, often moist or stringy. An eschar is typically dry and adherent.
• Necrosis: This refers to the death of cells or tissue itself, which is the process that leads to eschar formation.

Notes on Meaning

• The key characteristic of an eschar is that it is composed of necrotic (dead) tissue. It is not simply dried blood or plasma.
• It acts as a natural biological dressing but can also harbor bacteria and impede healing if it is unstable or infected.
• Unlike a common scab, an eschar often requires professional medical management for proper wound healing.

Học thuật

Noun

1. a dry scab formed on the skin following a burn or cauterization of the skin