Enterotomy technique in the descending colon of the horse. Effect of location and suture pattern.

The research article is investigating and comparing the effectiveness of different surgical techniques in enterotomies (surgical cut into the intestines) conducted on the descending colon of horses.

Objective of the Study

• The research aimed to explore and compare the effects of placing incisions at different locations and the use of different closure techniques in enterotomy surgeries conducted in the descending colon of horses.

Methodology

• Four longitudinal enterotomy surgeries were performed on each of the six test horses. The surgical approaches fell into four categories: incision through the antimesenteric teniae (bands of muscle along the intestine) with one- and two-layer closure, and incision adjacent to the teniae with one- and two-layer closure.
• 33 days after the surgery, the horses underwent post-mortem examination to observe any signs of obstruction, adhesions (abnormal bands of tissue connecting organs), and ultrasonographic measurements of the reduction in the colon’s lumen (interior space) diameter.
• Additional histologic and histomorphometric evaluations included examining the inflammatory response in the intestinal mucosal and muscular layers, detecting any atrophy or degeneration in the mucosal tissue, checking the alignment of the incision edges, calculating fibrosis area, and measuring the distance between the edges of the incised muscles.

Findings

• Out of the 24 enterotomies, 5 had developed adhesions. Incisions placed next to the teniae resulted in narrower lumen diameters compared to those placed through the teniae.
• The level of inflammation was observed to be higher with incisions made closer to the teniae and sealed with two-layer closures.
• The closure of the mucosa (innermost lining of the gut) as a separate layer had no significant effects on any of the evaluated parameters.
• Enterotomies carried out through the antimesenteric teniae were found to be easier to execute, induced less bleeding, and preserved a larger lumen diameter compared to the ones performed adjacent to the teniae.