Association of Mechanical Bowel Preparation and Oral Antibiotics Before Elective Colorectal Surgery With Surgical Site Infection

Key Points Question Which approach is best to reduce surgical site infections and anastomotic leak in colorectal surgery: mechanical bowel preparation with oral antibiotics, oral antibiotics only, mechanical bowel preparation only, or no preparation? Findings Among 38 randomized clinical trials (8458 patients) in this network meta-analysis, mechanical bowel preparation with oral antibiotics was associated with the lowest rate of surgical site infections, reducing both incisional and organ/space infections. There was no significant difference in anastomotic leak rate between the 4 approaches. Meaning Mechanical bowel preparation with oral antibiotics is the best approach to reduce surgical site infections in patients undergoing colorectal surgery.

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