Difference between revisions of "Category:Acute Inflammation"

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==Fluids==
 
==Fluids==
 
===[[Serous Inflammation]]===
 
===[[Serous Inflammation]]===
  
  
===Catarrhal===
+
===[[Catarrhal Inflammation]]===
  
* Catarrhal inflammation is a mild form of inflammation.
 
* Occurs on mucous membranes where there are many mucus cells.
 
* The consistency of catarrhal exudate varies from water to gelatinous.
 
* Colour varies from cloudy to pinkish.
 
*  This form of exudation is essentially a shedding of epithelium  containing many mucus cells, neutrophils, some RBCs, and flecks of  fibrin.
 
  
* Common in mild forms of rhinitis, tracheitis, bronchitis, gastritis and enteritis.
 
[[Category:Acute Inflammation]][[Category:To Do - Blood]]
 
 
===Fibrinous===
 
===Fibrinous===
  

Revision as of 11:13, 4 August 2010

Fluids

Serous Inflammation

Catarrhal Inflammation

Fibrinous

  • 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.

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.