| Line 31: |
Line 31: |
| | | | |
| | | | |
| − | ===Intussusception=== | + | ===[[Intussusception]]=== |
| − | [[Image:intussusception.jpg|thumb|right|150px|Diagram of intussuscception (Courtesy of Elspeth Milne)]]
| |
| − | * Telescoping of one segment of the bowel into another.
| |
| − | * Occurs in all species.
| |
| − | ** Particularly in young dogs.
| |
| − | * Can occur in the [[Small Intestine - Anatomy & Physiology|small intestine]], [[Caecum - Anatomy & Physiology|caecum]] or [[Colon - Anatomy & Physiology|colon]].
| |
| − | | |
| − | ====Clinical====
| |
| − | | |
| − | * Intussusception is a less acute type of obstruction.
| |
| − | * Produces intermittent [[Intestine Diarrhoea - Pathology|diarrhoea]].
| |
| − | * Animals go downhill in a few days.
| |
| − | * Palpation of abdomen may allow a "Cumberland sausage" effect to be felt.
| |
| − | ** NB abdominal palpation in small animal, rectal palpation in large animal.
| |
| − | | |
| − | ====Pathogenesis====
| |
| − | | |
| − | * Proximal intestine invaginates into lower part of intestine.[[Image:intussuceptionphoto.jpg|thumb|right|150px|Intersusception (Courtesy of Bristol BioMed Image Archive)]]
| |
| − | ** Takes mesenteric attachment with it.
| |
| − | * Compression of the mesenteric vessels obstructs venous drainage of the gut, resulting in venous congestion.
| |
| − | ** Swelling (oedema/congestion) arises.
| |
| − | *** Inflammatory exudate from serous surface.
| |
| − | **** Fibrinous adhesions form between surfaces making structure irreducible.
| |
| − | * May progress to necrosis and gangrene of the tissue.
| |
| − | * There is often functional obstruction to bowel.
| |
| − | * May rupture, leading to peritonitis and death.
| |
| − | *Associated with anything that raises peristalsis e.g. change in diet, bacterial infection.
| |
| − | ** Foreign body
| |
| − | ** Intramural abscess/tumour
| |
| − | ** Heavy parasitism
| |
| − | ** Previous intestinal surgery
| |
| − | ** Enteritis
| |
| − | ** Other motility disorders.
| |
| − | ** Change in diet
| |
| − | ** Bacterial infection
| |
| − | | |
| − | ====Pathology====
| |
| − | | |
| − | * When operate or at post mortem see large sausage shaped distension of length of intestine.
| |
| − | | |
| − | * Intussusception may occur post mortem
| |
| − | ** There are no associated changes
| |
| − | ** The condition is easilt reducible.
| |
| | | | |
| | ===Rectal prolapse=== | | ===Rectal prolapse=== |