Evaluation of three techniques for end-to end anastomosis of the small colon in horses.

The researchers experimented on 12 horses to establish the most potent surgical procedure for removing diseased small colon lesions. They compared three types of suturing techniques; an appositional one-layer, an inverting two-layer, and an appositional two-layer method. It was found that the appositional two-layer method had the least after-surgery issues while the appositional one-layer method had the most.

Research Methodology

• The study involved 12 horses and was executed in two parts. In the first part, four horses were subject to a comparison between an appositional one-layer (APP-1) suture approach and an inverting two-layer (INV-2).
• In the second segment, eight horses were availed for assessing the contrast between an appositional two-layer (APP-2) suturing technique and the INV-2 method.
• A size 1-0 polydioxanone suture was employed in all operations.
• Post-surgery, the horses were euthanized and evaluated atperiods of 3, 10, 14, 28, or 56 days. The researchers investigated any complications such as peritonitis, impaction, or excessive adhesions.

Research Findings

• The study findings exhibited that the APP-1 method resulted in after-surgical complications in all the horses. In contrast, the INV-2 and APP-2 technique showed complications in 42% and 13% of horses respectively.
• Additionally, postmortem evaluations revealed adhesion formation, diffuse peritonitis and dehiscence at the anastomotic site in 75% of horses wherein the APP-1 technique was deployed.
• It was noticed that both INV-2 and APP-2 methods led to more intestinal inversion in the nontaenial portion of the small colon compared to the taenial portion.
• Furthermore, it was observed that the INV-2 technique was linked to more postoperative impactions compared to the APP-2, apparently due to excessive tissue inversion.
• No difference was detected concerning lumen diameter between the INV-2 and the APP-2 techniques.

Conclusion

• The analysis suggests that among the three techniques taken into consideration, the appositional two-layer suturing method (APP-2) is apparently the most effective, presenting the least complications after surgery.
• On the other hand, appositional one-layer suturing (APP-1) is considered the least suitable approach due to the high complication rate it presented. Moreover, it also led to dehiscence, a forming of adhesion and diffuse peritonitis.