Changes

==Description==

==Description==

'''Left dorsal displacement''' is a type of [[Category:Colic in Horses|colic]] in the horse in which the left colon becomes displaced and lodged in the nephrosplenic space. Entrapment over the nephrosplenic ligament results in simple obstruction of the colon, usually without vascular compromise. The exact cause is unknown but it is thought that changes in the ingesta, gas content and motor activity of the colon are important factors.

Left dorsal displacement, or nephrosplenic entrapment, is a frequent cause of [[Category:Colic in Horses|colic]], where the left dorsal and ventral colon become displaced, and then trapped by the [[spleen]] laterally, the [[kidney]] medially, and the [[nephrosplenic ligament]] ventrally. Entrapment over the nephrosplenic ligament results in simple obstruction of the colon, usually without vascular compromise. The exact cause is unknown but it is thought that changes in the ingesta, gas content and motor activity of the colon are important factors.

==Signalment==

==Signalment==

==Treatment==

==Treatment==

The condition can usually be resolved with [[Colic, Medical Treatment|medical management]], IV fluids and analgesia in the form of NSAIDs should be given to correct hydration status and make the horse comfortable.  

The condition can usually be resolved with [[Colic, Medical Treatment|medical management]], IV fluids and analgesia in the form of NSAIDs should be given to correct hydration status and make the horse comfortable.

Mild displacements may respond to the withdrawal of feed, allowing the colon to empty and return to a normal position. This can be aided by the administration of phenylephrine which causes splenic contraction, significantly reducing its size and allowing the colon to relocate. Light exercise such as trotting on the lunge can also be beneficial.

Mild displacements may respond to the withdrawal of feed, allowing the colon to empty and return to a normal position. This can be aided by the intra-venous administration of [[phenylephrine]] which causes splenic contraction, significantly reducing its size and allowing the colon to relocate. Light exercise can also be beneficial to encourage movement of the abdominal contents.  Circling on the left rein is considered particularly helpful, as it increases the potential space between the spleen and the body wall, allowing more room for the colon to return to its normal location.  

In some cases the horse can be anaesthetised and a rolling technique used to try and correct the displacement. The procedure involves anaesthestising the horse and placing it in on its right side, lifting it with a hoist and returning it onto the left side. Rectal manipulations can aid the relocation of the colon but it is not always successful.  

In some cases the horse can be anaesthetised and a rolling technique used to try and correct the displacement. The procedure involves anaesthestising the horse and placing it in on its right side, lifting it with a hoist and returning it onto the left side. Rectal manipulations can aid the relocation of the colon but it is not always successful.