Comparison of staple and suture techniques for end-to-end anastomosis of the small colon in horses.

The research article discusses a comparison study between two techniques used for reattaching the small colon in horses. The results show that the suturing technique resulted in a more effective outcome than the usage of staples due to the larger luminal diameters formed, better healing results, and fewer abdominal adhesions.

Methodology

• The researchers evaluated two methods for end-to-end anastomosis of the small colon in six horses. This is a procedure that connects two sections of the small colon together.
• The first method used a simple interrupted suturing pattern that excluded the mucosa (internal layer of the colon) with an added inverting suture.
• The second method used a triangulated double-row pattern of stainless steel staples for connection.
• The anastomotic sites were then assessed at various intervals: at 2 weeks, 2 months, and 6 months post-surgery.
• The evaluation process focused on the lumen diameter at the anastomotic sites, bursting pressures, abdominal adhesion extent, and the healing response.

Findings

• The results of the study showed that both techniques didn’t cause any clinical postoperative complications.
• However, during autopsy, the study revealed excessive adhesion formation from the mesocolon to the stapled anastomotic site, which is a potentially unfavorable outcome.
• Contrarily, the suturing method resulted in larger luminal diameters, indicating a more spacious and operating intestine.
• Furthermore, a positive tissue layer apposition was observed in the sutured colons, suggesting effective healing.
• Staples were found to be missing as early as two weeks post-surgery, an issue that was associated with the separation of the muscular layer in the colon at later evaluation times.
• In both techniques, all but one anastomotic segment burst away from the anastomotic site along the mesenteric taenial band, suggesting high bursting pressures.

Conclusion

• For the 12 anastomoses performed on horses, the study concludes that the suturing method came out to be superior than the stapling technique.
• The suturing technique was favored due to the larger intestinal diameter created, more efficient healing of the anastomosis, and the significantly lesser formation of intra-abdominal adhesion.