A comparison of three methods of end-to-end anastomosis in the equine small colon.

This research studied three methodologies of end-to-end anastomosis (surgical connection of two parts) in equine small colons to identify which technique was superior. The evaluation covered elements like adhesion formation, alignment of tissue, inflammation, and the time required to perform each method. No technique was found to be superior in all areas, but each had its distinct advantages and disadvantages.

Study Design and Implementation

• Six animals were used in the study, three of which were specifically evaluated three days post-surgery for adhesion formation and the diameter of the luminal at each anastomosis site.
• The remaining three, two ponies and a horse, were examined 14 days post-surgery to assess adhesion formation.
• All the anastomosis sites underwent histological examination to check the alignment of tissue planes and any visible inflammation.

Surgeries Outcome

• There was varying success in the different anastomosis techniques, but no single technique was superior in every evaluated area.
• After three days following the surgery, only three of the nine anastomoses showed mild fibrinous adhesions. However, after fourteen days, all anastomoses had varying degrees of well-organized adhesions indicating diverse healing phases based on the technique used.
• The luminal diameter, crucial in bowel functions, was impacted the most by the simple continuous technique after the three-day evaluation post-surgery.

Alignment of Tissues Planes and Inflammation

• The simple interrupted technique showed consistent alignment of tissue planes, marginally outperforming the simple continuous method.
• The stapled anastomoses results were inconsistent and demonstrated turned in (inverted) or turned out (everted) sites in all animals.
• The formation of adhesions was less extensive, and inflammation evidence was less severe with the stapled anastomoses technique.

Time Required for Completing Anastomoses

• The average times taken to perform the simple interrupted, simple continuous, and stapled anastomoses were 22, 14, and 8 minutes respectively, indicating noteworthy time efficiencies associated with the use of stapled anastomosis.