Small Intestine Ultrasound Findings on Horses Following Exploratory Laparotomy, Can We Predict Postoperative Reflux?
Authors: Cuevas-Ramos Gabriel, Domenech Lara, Prades Marta
Journal: Animals : an open access journal from MDPI
Summary
Postoperative reflux remains a significant complication following equine colic surgery, yet identifying at-risk horses early remains challenging. Researchers performed transcutaneous abdominal ultrasounds on 58 horses during the first three days post-laparotomy, assessing small intestinal loop diameter, wall thickness, motility, and luminal echogenicity, with comparison to 20 control horses undergoing elective procedures unrelated to colic. Horses with small intestinal pathology—particularly those requiring resection and anastomosis—demonstrated markedly thicker intestinal walls, increased loop diameters, reduced motility, and hypoechoic (fluid-filled) appearance of the luminal contents, whilst those with large colon disease showed ultrasound parameters similar to controls. Although the horses that subsequently developed postoperative reflux were too few for statistical analysis, all displayed these characteristic ultrasonographic changes, suggesting potential predictive value. These findings propose that serial abdominal ultrasound examination in the immediate postoperative period may help identify horses at heightened risk of reflux complications, though larger prospective studies are needed before these parameters can be confidently applied to clinical decision-making and medical management protocols.
Read the full abstract on PubMed
Practical Takeaways
- •Post-colic surgery, use abdominal ultrasound within three days to assess for thickened small intestinal walls and dilated loops as potential early indicators of reflux risk
- •Small intestine resection/anastomosis cases warrant closer ultrasound monitoring post-operatively, as these showed the most pronounced ultrasonographic changes
- •Normal ultrasound findings post-operatively are reassuring for large colon cases, but abnormal SI parameters should heighten vigilance for reflux development
Key Findings
- •Horses with small intestinal pathology showed significantly thicker SI walls, increased loop diameter, slower motility, and hypoechoic contents on postoperative ultrasound compared to control and large colon pathology groups
- •All horses that developed postoperative reflux demonstrated abnormal ultrasonographic changes including thickened walls and dilated loops within three days post-surgery
- •Ultrasound findings in horses with large colon pathology were similar to the control group, suggesting SI-specific changes may be predictive
- •Transcutaneous abdominal ultrasound of the caudoventral abdomen proved useful for identifying abnormal small intestinal parameters in the postoperative period