Changes

===Description===

===Description===

An intussusception is an invagination of a length of intestine (the intussusceptum) into an adjacent more distal segment (the intussuscipiens). The small intestine is the most common site for this to occur. Intussuception in the horse most commonly involves the ileum (ileo-caecal or ileo-ileal), with jejuno-jejunal intussusceptions being rarer.

An intussusception is an invagination of a length of intestine (the intussusceptum) into an adjacent more distal segment (the intussuscipiens). The small intestine is the most common site for this to occur. Intussuception in the horse most commonly involves the ileum (ileo-caecal or ileo-ileal). Jejuno-jejunal intussusceptions also occur in the horse but they are considerably less common.  

===Signalment===

===Signalment===

===Diagnosis===

===Diagnosis===

Abdominal ultrasonography may reveal a characteristic target or 'bulls eye' lesion on cross section. Peristalsis in the affected region is reduced or absent. Oedema and thickening of the intestinal wall are often seen with a distended, fluid filled region proximal to the intussusception.

Abdominal ultrasonography may reveal a characteristic target or 'bulls eye' lesion on cross section. Peristalsis in the affected region is reduced or absent. Oedema and thickening (>3mm) of the intestinal wall are often seen with a distended, fluid filled region proximal to the intussusception. In the case of jejuno-jeunal intussusceptions, rectal examination may reveal a sausage-shaped, tubular structure in the mid-abdomen of the horse.

Abdominocentesis rarely reveals any abnormalities due to the strangulated portion of gut being contained within the intussuscipiens.  

Abdominocentesis rarely reveals any abnormalities due to the strangulated portion of gut being contained within the intussuscipiens.