The effect of preoperative oral nutritional supplementation on surgical site infections among adult patients undergoing elective surgery: A systematic review and meta-analysis.

L. Cadili,P. van Dijk,A. Grudzinski,J. Cape,Angela H. Kuhnen

Published 2023 in American Journal of Surgery

ABSTRACT

INTRODUCTION Mixed findings are reported on the effect of oral nutritional supplements in reducing Surgical Site Infections (SSIs). MATERIAL AND METHODS PubMED, EMBASE and Cochrane were searched. Studies from inception to July 2022 were included if they involved adults undergoing elective surgery and compared preoperative macronutrient oral nutritional supplements to placebo/standard diet. RESULTS Of 372 unique citations, 19 were included (N = 2480): 13 RCTs (N = 1506) and 6 observational studies (N = 974). Moderate-certainty evidence suggested that nutritional supplements SSI risk (OR 0.54, 95% C.I. 0.40-0.72, N = 2718 participants). In elective colorectal surgery, this risk-reduction was 0.43 (95% C.I. 0.26-0.61, N = 835 participants) and among patients who received Impact 0.48 (95% C.I. 0.32-0.70, N = 1338). CONCLUSION Oral nutritional supplements prior to adult elective surgery may significantly reduce SSIs, with an overall 50% protective effect. This protective effect persisted in subgroup analysis of colorectal surgery patients and the use of Impact.

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