Triclosan-coated sutures and surgical site infection in abdominal surgery: the TRISTAN review, meta-analysis and trial sequential analysis

Introduction: Surgical site infection (SSI) is a frequent complication of abdominal surgery causing increased morbidity. Triclosan-coated sutures are recommended to reduce SSI. The aim of this systematic review and meta-analysis was to evaluate the evidence from randomized controlled trials (RCT) comparing the rate of SSI in abdominal surgery when using triclosan-coated or uncoated sutures for fascial closure. Methods: A systematic literature search was conducted using Medline, EMBASE, the Cochrane library, CINAHL, Scopus and Web of Science including publications until August 2017. The quality of the RCTs was evaluated using critical appraisal checklists from SIGN. Meta-analyses and trial sequential analysis were performed with Review Manager v5.3 and TSA software, respectively. Results: Eight RCTs on abdominal wall closure were included in the meta-analysis. In an overall comparison including both triclosan-coated Vicryl and PDS sutures for fascial closure, triclosan-coated sutures were superior in reducing the rate of SSI (OR 0.67; 0.46–0.98). When evaluating PDS sutures separately, there was no effect of triclosan-coating on the rate of SSI (OR 0.85; 0.61–1.17). Trial sequential analysis showed that the required information size (RIS) of 797 patients for triclosan-coated Vicryl sutures was almost reached with an accrued information size (AIS) of 795 patients. For triclosan-coated PDS sutures an AIS of 2707 patients was obtained, but the RIS was estimated to be 18,693 patients. Conclusion: Triclosan-coated Vicryl sutures for abdominal fascial closure decrease the risk of SSI significantly and based on the trial sequential analysis further RCTs will not change that outcome. There was no effect on SSI rate with the use of triclosan-coated PDS sutures for abdominal fascial closure, and it is unknown whether additional RCTs will change that.

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