Long-term survival of equine surgical colic cases. Part 1: patterns of mortality and morbidity.
Authors: Proudman C J, Smith J E, Edwards G B, French N P
Journal: Equine veterinary journal
Summary
# Editorial Summary Colic surgery outcomes extend far beyond the immediate postoperative period, with critical mortality windows and complications emerging weeks or months after discharge. Proudman and colleagues tracked 341 horses recovering from colic surgery over a 30-month period using structured telephone and postal questionnaires, accumulating 321 horse-years of follow-up data to characterise long-term survival patterns and morbidity. Survival probability demonstrated a triphasic decline: dropping sharply to 87% by day 10, further declining to 82% by day 100, then stabilising at approximately 75% by day 600—with epiploic foramen entrapment cases showing double the mortality risk compared to other strangulating lesions (relative risk 2.1). Postoperative colic emerged as the most frequent complication, affecting nearly 30% of horses with an incidence rate of 0.55 episodes per horse-year, though recurrent cases (≥3 episodes) remained uncommon at 4.6% of the population. These findings fundamentally reshape client counselling around surgical colic prognosis, highlight that discharge does not equate to full recovery, and underscore why particular lesion types—notably epiploic foramen entrapments—warrant more cautious long-term prognostication and enhanced postoperative surveillance protocols.
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Practical Takeaways
- •Counsel owners that colic surgery survival is not determined at discharge—expect continued mortality risk throughout the first 600 days, with particular caution in the first 10 days postoperatively
- •Flag epiploic foramen entrapment cases as higher risk for death compared to other surgical colic types; communicate more cautious prognosis to clients
- •Nearly 30% of post-surgical colic cases experience repeat episodes; implement robust postoperative management protocols and client education to recognize early signs of recurrent colic
Key Findings
- •Postoperative survival decreased to 0.87 by 10 days, 0.82 by 100 days, and 0.75 at 600 days post-colic surgery
- •Epiploic foramen entrapment carried significantly worse prognosis with 2.1× relative risk of death compared to other strangulating lesions
- •Postoperative colic was the most prevalent complication affecting 29% of horses (100/341), with incidence of 0.55 episodes per horse-year at risk
- •Marked mortality occurred in the first 10 days postoperatively with triphasic survival pattern over 600 days