An update on equine post-operative ileus: Definitions, pathophysiology and management.

The research article reviews the current understanding and management of post-operative ileus (POI) in horses, a condition that can arise after abdominal surgery, and that leads to delayed recovery and increased costs. The study explores progress in understanding the development of the condition, its pathophysiology, and therapeutic approaches based on human and animal trials, emphasizing the critical role of inflammation and the activation of specific internal body defenses in POI’s development.

Understanding Post-Operative Ileus (POI)

• POI is a severe condition that can affect horses following abdominal surgery. It involves a disruption in the normal functioning of the intestine, causing a range of symptoms, including constipation and abdominal pain.
• The condition leads to extended hospital stays and increased healthcare costs.
• The understanding of equine POI is primarily based on human and rodent studies, as veterinary-specific literature is limited. This research attempts to close this gap.

The Role of Inflammation in POI

• Inflammation caused by surgical manipulation has been identified as a significant trigger for the development of POI.
• Specifically, the activation of resident muscularis externa macrophages, a type of defense cell located in muscles, plays a key role in this pathophysiology.
• These activated macrophages trigger inflammation and disrupt the functioning of the intestines leading to the symptoms of POI.

Treatment of Post-Operative Ileus

• Despite numerous pharmacological trials in all species, the research found no single completely successful treatment for POI. This finding underscores the complexity and multifactorial nature of the condition.
• To reduce the incidence of POI, the management approach should be multimodal. It may involve a combination of several therapies like medications, diet modification, physical activity, and potentially supportive care such as fluid therapy.
• The study emphasizes more research is necessary to develop new treatment strategies and reduce the impact of this condition on horses and the equine industry.