Difference between revisions of "Intestinal Arterial Thromboembolism"

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* See sharply delineated dark areas in bowel that are flaccid with loss of tone.   
 
* See sharply delineated dark areas in bowel that are flaccid with loss of tone.   
 
** These become necrotic followed later by peritonitis.[[Category:Intestine_-_Vascular_Disturbances]]
 
** These become necrotic followed later by peritonitis.[[Category:Intestine_-_Vascular_Disturbances]]
[[Category:Intestinal Pathology - Dog]][[Category:Dog - Cardiovascular System]][[Category:Cat]]
+
[[Category:Intestinal Pathology - Dog]][[Category:Cardiovascular Pathology - Dog]][[Category:Cat]]
 
[[Category:To_Do_-_Clinical]]
 
[[Category:To_Do_-_Clinical]]
 
[[Category:Cardiovascular_Disorders_-_Horse]]
 
[[Category:Cardiovascular_Disorders_-_Horse]]
 
[[Category:Small_Intestinal_Disorders_-_Horse]]
 
[[Category:Small_Intestinal_Disorders_-_Horse]]

Revision as of 16:46, 15 December 2010

  • Non-strangulation infarction.
  • There is often a functional obstruction at point of infarction.
  • Relatively rare as the bowel has a good anastomosing blood supply.
Thrombosis of cranial mesenteric artery caused by Strongylus vulgaris larvae (Courtesy of Bristol BioMed Image Archive)

Horses

  • E.g. Strongylus vulgaris larvae migrating in cranial mesenteric artery in horse
    • Cause arteritis with thickening of wall
      • Due to fibrin and debris deposition and hypersensitivity reaction
    • Leads to vasoconstriction
      • May occlude lumen and encourage thromboemboli.
    • Can cause ischaemic necrosis of a segment of small intestine
    • Is less common now that Strongylus vulgaris infections are declining.
  • E.g. equine salmonellosis.
Infarction of the small bowel (Courtesy of Bristol BioMed Image Archive)

Small Animals

  • Especially dogs
  • Road traffic accidents produce and infact in the gut.
  • Renal disease also causes infarction.
    • Particularly nephrotic syndrome.
    • Anticoagulant proteins are lost in the urine, leading to a prothrombic state in the ciruclation.

Pathology

  • Similar to that caused by venous congestion.
  • See sharply delineated dark areas in bowel that are flaccid with loss of tone.
    • These become necrotic followed later by peritonitis.