Prevalence of and risk factors for postoperative ileus after small intestinal surgery in two hundred and thirty-three horses.
Authors: Holcombe Susan J, Rodriguez Katie M, Haupt Jennifer L, Campbell James O, Chaney Kristin P, Sparks Holly D, Hauptman Joe G
Journal: Veterinary surgery : VS
Summary
# Postoperative Ileus in Equine Small Intestinal Surgery: What the Data Tell Us Between 1995 and 2005, researchers analysed 233 horses that underwent exploratory celiotomy for small intestinal disease, examining 68 variables from their medical records to identify risk factors for postoperative ileus (POI)—a common complication defined as nasogastric reflux exceeding 20 litres over 24 hours or 8 litres at a single time point. POI occurred in 27% of the population overall, though incidence varied substantially depending on surgical findings: only 15% of horses without intestinal resection developed POI (excluding those with duodenitis proximal jejunitis), compared with 30% of horses requiring resection, with notably few cases (10%) persisting beyond 24 hours. When duodenitis proximal jejunitis cases were excluded from analysis, elevated packed cell volume on admission, advancing age, and greater length of intestinal resection emerged as statistically significant risk factors, though the authors acknowledge these predictors lack sufficient specificity for clinical certainty. For practitioners, these findings suggest that intestinal resection itself represents the primary modifiable consideration affecting POI likelihood, whilst patient age and hydration status warrant careful perioperative attention; however, the inability to predict POI reliably means all post-surgical small intestinal cases warrant vigilant nasogastric monitoring regardless of risk stratification.
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Practical Takeaways
- •Expect postoperative ileus in approximately 1 in 4 horses after small intestinal surgery; risk doubles if resection is required—monitor nasogastric output closely in first 24-48 hours
- •Older horses and those admitted with elevated packed cell volume (dehydration) carry higher POI risk; aggressive perioperative fluid therapy and monitoring are warranted in these patients
- •Most cases of POI resolve within 24 hours, but individual prediction remains unreliable—manage expectantly with nasogastric decompression rather than trying to identify which cases will develop it
Key Findings
- •27% (64/233) of horses developed POI after small intestinal surgery, with 46% of POI cases having duodenitis proximal jejunitis
- •POI occurred in 15% of horses without intestinal resection (excluding DPJ cases) versus 30% after intestinal resection
- •High packed cell volume at admission, increasing age, and length of intestinal resection were independent risk factors for POI development
- •Only 10% of horses with POI experienced prolonged ileus (>24 hours), indicating most cases resolve quickly