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Small Colon Impaction - Horse (view source)
Revision as of 12:13, 9 August 2010
, 12:13, 9 August 2010no edit summary
'''Impaction<br>
'''Impaction<br>
'''Simple Obstruction<br>
'''Simple Obstruction<br>
'''Large Intestinal Simple Obstruction<br>
'''Descending Colon Simple Obstruction<br>
'''Large Intestinal Obstruction<br>
'''Descending Colon Obstruction<br>
'''Large Intestinal Impaction<br>
'''Descending Colon Impaction<br>
'''Large Intestinal Mechanical Obstruction<br>
'''Descending Colon Mechanical Obstruction<br>
'''Small Colon Obstruction<br>
'''Small Colon Obstruction<br>
'''Small Colon Simple Obstruction<br>
'''Small Colon Simple Obstruction<br>
==Description==
==Description==
Different from other types of impaction in predispositions and clinical appearance(BLiks)
Different from other types of impaction in predispositions and clinical appearance(BLiks)
Abnormalities involving the descending (small) colon are infrequent, accounting for <5% of conditions characterized by colic in one study. The more common causes include meconium retention, impaction, and foreign body obstruction. Meconium retention is seen in newborn male foals within the first 24 hr of life. Affected foals swish their tails from side to side, strain to defecate, and roll. The diagnosis is made by careful digital examination. Treatment involves gentle administration of a warm, soapy water enema. The prognosis is excellent.Impaction of the descending colon is seen in ponies, miniature horses, and adult horses with limited access to drinking water or with other causes of intestinal stasis. Most recently, the condition has been associated with salmonellosis, although a cause and effect relationship has not been proved. Pain may be severe if the obstruction is complete. In such cases, tympany of the colon occurs secondarily, and ileus results. The diagnosis is made in adult horses by palpating the obstructing mass in the ventral portion of the abdomen on rectal examination. Foreign body obstruction of the descending colon must be considered if the horse is <3 yr old; the offending material may be rubber fencing, nylon fibers from halters or lead shanks, hay net, or feed sacks. Horses with impactions may be treated medically with analgesics, IV fluids, and gentle enemas. Often, however, surgery is required to evacuate the colon due to severity of pain and gas distention. The prognosis associated with impaction of the descending colon is fair unless it is complicated by severe colitis after the obstruction has been removed. The prognosis is good.
==Aetiology==
==Aetiology==