Biliary Obstruction

Biliary Obstruction



Basic Information image



Definition


Large colon displacement and cholelithiasis are the most common causes of acute biliary obstruction in adult horses. Rarely, foals may develop biliary obstruction secondary to duodenal stricture.



Epidemiology



Species, Age, Sex




• Middle-aged to older horses


• Neonatal foals secondary to duodenal stricture



Clinical Presentation



History, Chief Complaint




• Depression, anorexia, and colic.


• Bruxism and salivation may be present in foals.



Physical Exam Findings




• Fever, variable icterus, and colic.


• Clinical signs of hepatoencephalopathy and photosensitization may also be present.


• Clinical signs may be intermittent if a partial obstruction is present.


• Foals with duodenal stricture may have excessive gastric reflux.



Etiology and Pathophysiology




• Obstruction of the biliary tract in a mature horse may be attributable to cholelithiasis, right dorsal colon displacement, neoplasia, hepatic torsion, or portal vein thrombosis. Duodenal stricture in foals may be secondary to duodenal ulceration.


• Acute biliary obstruction causes cholestasis, biliary distension, and variable pain.


• Chronic biliary obstruction results in hepatic fibrosis, originating around the obstructed biliary branch(es).

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Jul 24, 2016 | Posted by in SMALL ANIMAL | Comments Off on Biliary Obstruction

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