Present address for Drs Cook and Pease: Department of Large Animal Clinical Sciences, College of Veterinary Medicine, Michigan State University, East Lansing, Michigan, 48823, USA.
Use of ultrasound to evaluate outcome following colic surgery for equine large colon volvulus
Version of Record online: 14 DEC 2009
© 2009 EVJ Ltd
Equine Veterinary Journal
Volume 42, Issue 1, pages 47–52, January 2010
How to Cite
SHEATS, M. K., COOK, V. L., JONES, S. L., BLIKSLAGER, A. T. and PEASE, A. P. (2010), Use of ultrasound to evaluate outcome following colic surgery for equine large colon volvulus. Equine Veterinary Journal, 42: 47–52. doi: 10.2746/042516409X456040
- Issue online: 14 DEC 2009
- Version of Record online: 14 DEC 2009
- [Paper received for publication 02.02.09; Accepted 07.04.09]
- large colon volvulus;
- multiple organ dysfunction syndrome;
Reasons for performing study: The post operative response of the large colon wall after a surgically corrected large colon volvulus (LCV) has not been investigated.
Objectives: To use transabdominal ultrasound to monitor the post operative change in large colon wall thickness following surgical correction of LCV.
Hypothesis: A prolonged period to colon wall involution is correlated with an increased rate of post operative morbidity and mortality.
Methods: A prospective clinical study including horses that presented to the North Carolina State University Veterinary Teaching Hospital for colic between September 2006 and March, 2008, had surgically diagnosed and corrected LCV (at least 360°) without resection and recovered from anaesthesia. Ultrasound of the ventral large colon was performed at the time of anaesthetic recovery and every 6–8 h until the colon wall returned to normal thickness (≤5 mm). Outcome was evaluated using a one-way ANOVA to compare average time to colon wall involution between: 1) survivors and nonsurvivors; and 2) horses that developed multiple organ dysfunction syndrome (MODS) during the post operative period and those that recovered without evidence of MODS.
Results: Sixteen horses that recovered without evidence of MODS had a significantly shorter period to colon wall involution (≤5 mm) compared to those diagnosed with MODS (mean ± s.e. 19.6 h ± 2.5 and 39.7 h ± 6.7 respectively, P = 0.006). There was no significant difference in mean period to colon wall involution between survivors and nonsurvivors (26.2 ± 4.9 and 33.2 ± 7.8 h, respectively).
Conclusions: A shorter time to colon wall involution was associated with decreased post operative morbidity in horses presented for surgical correction of large colon volvulus without resection.
Potential relevance: Ultrasonographic monitoring of colon wall involution after surgical correction of LCV may aid in identifying those cases at risk of MODS. Further investigation of colon wall involution time using a larger number of horses is warranted.