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Research Note: Comparison of Anal Purse-String Suture Techniques

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Anal purse-string suture can decrease the risk for fecal contamination and subsequent surgical site infection during surgery in the perianal region and in some pelvic limb orthopedic procedures. This study aimed to identify which anal purse-string suture technique (ie, 3 bites with 0.5 cm between bites, 5 bites with 0.5 cm between bites, 3 bites with 1 cm between bites) required the fewest tissue bites to create a consistent leak-proof closure. All techniques used 2-0 monofilament nylon suture placed in the cutaneous tissue surrounding the anus and knotted with 6 square throws. Leak pressure testing demonstrated resistance to leakage regardless of technique, but 3 bites with 0.5 cm between bites was recommended, as it provided the highest resistance to leakage and used the fewest bites.

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