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Prevalence of and Risk Factors for Postoperative Ileus after Small Intestinal Surgery in Two Hundred and Thirty-Three Horses

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To determine the incidence of postoperative ileus (POI) in a population of horses after small intestinal surgery and the effect of multiple variables on development of POI. Study Design

Case series. Animals

Horses (n=233) aged ≥1 year that had exploratory celiotomy for small intestinal disease that recovered from surgery from 1995 to 2005. Methods

Sixty-eight variables were collected from medical records (1995–2005) for each horse. POI was defined as nasogastric reflux volume >20 L over 24 hours or >8 L at any single time after surgery. Results

Twenty-seven percent (64/233) of horses developed POI; 29 of 64 (46%) horses with POI had duodenitis proximal jejunitis (DPJ). When no intestinal resection was required at surgery, excluding horses with DPJ, 15% of horses had POI; 30% horses had POI after intestinal resection. Ten percent of horses had POI for >24 hours. When horses with DPJ were excluded, factors associated with increased risk of POI included high packed cell volume at hospital admission (P=.024), increasing age (P=.0004), and length of intestinal resection (P=.05). Conclusions

Risk factors for POI in this study were nonspecific although horses with intestinal resection are at higher risk compared with horses without intestinal resection. Clinical Relevance

Predicting with certainty which cases will develop POI remains elusive.
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Document Type: Research Article

Affiliations: Departments of Large Animal Clinical Sciences and Small Animal Clinical Sciences, College of Veterinary Medicine, Michigan State University, East Lansing, MI

Publication date: 01 April 2009

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