Survival of horses following strangulating large colon volvulus
Version of Record online: 19 SEP 2012
© 2012 EVJ Ltd
Equine Veterinary Journal
Volume 45, Issue 2, pages 219–223, March 2013
How to Cite
SUTHERS, J. M., PINCHBECK, G. L., PROUDMAN, C. J. and ARCHER, D. C. (2013), Survival of horses following strangulating large colon volvulus. Equine Veterinary Journal, 45: 219–223. doi: 10.1111/j.2042-3306.2012.00620.x
- Issue online: 1 FEB 2013
- Version of Record online: 19 SEP 2012
- Received: 28.02.12; Accepted: 03.06.12
- large colon volvulus;
Reasons for performing study: The pattern of long-term survival and specific factors associated with long-term survival have not previously been evaluated in horses with a strangulating large colon volvulus (LCV).
Objectives: To provide data on the long-term survival of horses with LCV and to identify pre-, intra- and post operative variables associated with survival.
Methods: Clinical data and long-term follow-up information were obtained from 116 horses with a strangulating LCV (≥360°) undergoing general anaesthesia. Two multivariable Cox proportional hazards models for post operative survival time were developed: Model 1 included all horses and evaluated preoperative variables and Model 2 included horses that survived anaesthesia and evaluated pre-, intra- and post operative variables.
Results: The study population comprised 116 horses. Eighty-nine (76.7%) survived general anaesthesia. Of these, the percentage that survived until discharge, to one year and to 2 years was 70.7%, 48.3% and 33.7%, respectively. Median survival time for horses that survived general anaesthesia was 365 days. In Model 1 increased preoperative packed cell volume (PCV) was significantly associated with reduced post operative survival (hazard ratio [HR] 1.08, 95% confidence interval [CI] 1.05–1.11). However, this effect changed over time. In Model 2 abnormal serosal colour intraoperatively (HR 3.61, 95% CI 1.55–8.44), increased heart rate at 48 h post surgery (HR 1.04, 95% CI 1.02–1.06), and colic during post operative hospitalisation (HR 2.63, 95% CI 1.00–6.95), were all significantly associated with reduced post operative survival.
Conclusions: Survival time in horses with a LCV was associated with preoperative PCV, serosal colour, heart rate at 48 h post operatively and colic during post operative hospitalisation.
Potential relevance: This study provides evidence-based information on the long-term survival of horses with LCV and identifies parameters that may assist decision-making by clinicians and owners.