Difference between revisions of "Category:Acute Inflammation"

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===Fibrinous===
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===[[Fibrinous Inflammation]]===
  
* Fibrinous exudation occurs in more severe endothelial injury.
 
** Injury results in the escape of fibrinogen, which is converted to fibrin.
 
* The fibrin formed appears as a yellowish coagulation on the surface of or within a tissue.
 
** Common in the lungs and on serous surfaces.
 
* In hollow organs the fluid may coagulate to form casts of the lumen.
 
  
* Fibrin will peel off from the underlying tissue without causing damage to it.
 
[[Category:Acute Inflammation]][[Category:To Do - Blood]]
 
 
===Diptheritic===
 
===Diptheritic===
  

Revision as of 11:13, 4 August 2010

Fluids

Serous Inflammation

Catarrhal Inflammation

Fibrinous Inflammation

Diptheritic

  • Diphtheritic exudate a more severe form of fibrinous exudate in which there is considerable necrosis of the underlying tissues.
  • Diptheritic exudate is firmly adherent to the underlying tissue.
    • Attempts at removal cause tearing of this tissue>
  • Commonly seen with internal surface fungal infections.
    • E.g. in the nose of the dog and the guttural pouch of the horse.
    • Fungal toxins penetrate the underlying tissue causing coagulation necrosis.

Haemorrhagic

  • This is a severe acute to peracute inflammation in which haemorrhage is the main component.
  • Seen in the lymph nodes, lungs and intestine in severe inflammation.

Purulent

  • In purulent inflammation, pus is the predominant feature.
    • Pus is an admixture of dead and dying neutrophils with necrotic cells and a pyogenic agent.
      • Proteolytic enzymes released by the dying neutrophils lyse tissue cells to produce a fluid.
  • Colour varies depending upon the agent.
    • May be white, yellow, green or brown.
  • An abscess is a circumscribed sphere of pus surrounded by a pyogenic membrane.
    • The pyogenic membrane is composed of capillaries bringing neutrophils into the sphere.
    • This rapidly becomes enveloped by a fibrous tissue capsule.
      • A local connective tissue response attempting to wall off the purulent irritant from nearby normal tissue.