A potential technique error in stapled side-to-side anastomosis of the small intestine of the horse.

The study investigates the risks of a common horse surgery technique where the small intestines are joined using staple lines. The researchers found that the method often results in leaks at the junction where the staples meet, especially when the lateral surfaces of the intestinal segments are joined, leading to potential complications.

Research Methodology

• The researchers began their investigation by studying an incidence of anastomotic leakage in a clinical equine patient. This leakage was noted to occur at the junction of the staple lines used to staple together the small intestines in a side-to-side anastomosis operation.
• To examine this issue further, they performed six anastomoses on the jejunum of an adult horse under anesthesia using a gastrointestinal anastomosis stapling instrument (GIA)
• Half of these anastomoses were done by joining the antimesenteric edges of the bowel segments, and the other half by joining the lateral surfaces of the segments. The antimesenteric edge is the edge opposite to the mesenteric attachment, while the lateral surfaces are the sides of the intestine.
• After the anastomosis operations, the bowel segments were dissected for examination of the stoma, which is the opening created for the anastomosis, as well as for any defects in the integrity of the staple lines.

Research Findings

• Upon dissecting and examining the bowel segments, they found no defects in the anastomoses that were carried out by joining the antimesenteric edges of the bowel segments.
• However, all the anastomoses created by joining the lateral surfaces of the bowel segments had defects at the junction of the double rows of staples used to create the stoma. These defects could potentially allow leakage of fluid and/or ingesta (food particles), posing a risk to the animal’s health.
• The results suggest that the method of joining the lateral surfaces in a side-to-side anastomosis procedure could lead to complications due to the presence of defects at the staple junctions.

Significance

• The findings of this study could have significant implications for surgical procedures performed on equine patients.
• This study helps to identify potential risks and complications that could arise during or after a common surgical procedure, aiding in the development of safer and more efficient techniques.
• Veterinary surgeons can leverage this insight to make informed decisions about the operational techniques to be used, depending on the specific condition of the individual horse.