Surgical site infections following colorectal cancer surgery: a randomized prospective trial comparing common and advanced antimicrobial dressing containing ionic silver

Roberto Biffi, Luca Fattori, Emilio Bertani, Davide Radice, Nicole Rotmensz, Pasquale Misitano, Sabine Cenciarelli, Antonio Chiappa, Liliana Tadini, Marina Mancini, Giovanni Pesenti, Bruno Andreoni, Angelo Nespoli, Roberto Biffi, Luca Fattori, Emilio Bertani, Davide Radice, Nicole Rotmensz, Pasquale Misitano, Sabine Cenciarelli, Antonio Chiappa, Liliana Tadini, Marina Mancini, Giovanni Pesenti, Bruno Andreoni, Angelo Nespoli

Abstract

Background: An antimicrobial dressing containing ionic silver was found effective in reducing surgical-site infection in a preliminary study of colorectal cancer elective surgery. We decided to test this finding in a randomized, double-blind trial.

Methods: Adults undergoing elective colorectal cancer surgery at two university-affiliated hospitals were randomly assigned to have the surgical incision dressed with Aquacel Ag Hydrofiber dressing or a common dressing. To blind the patient and the nursing and medical staff to the nature of the dressing used, scrub nurses covered Aquacel Ag Hydrofiber with a common wound dressing in the experimental arm, whereas a double common dressing was applied to patients of control group. The primary end-point of the study was the occurrence of any surgical-site infection within 30 days of surgery.

Results: A total of 112 patients (58 in the experimental arm and 54 in the control group) qualified for primary end-point analysis. The characteristics of the patient population and their surgical procedures were similar. The overall rate of surgical-site infection was lower in the experimental group (11.1% center 1, 17.5% center 2; overall 15.5%) than in controls (14.3% center 1, 24.2% center 2, overall 20.4%), but the observed difference was not statistically significant (P = 0.451), even with respect to surgical-site infection grade 1 (superficial) versus grades 2 and 3, or grade 1 and 2 versus grade 3.

Conclusions: This randomized trial did not confirm a statistically significant superiority of Aquacel Ag Hydrofiber dressing in reducing surgical-site infection after elective colorectal cancer surgery.

Trial registration: Clinicaltrials.gov: NCT00981110.

Figures

Figure 1
Figure 1
Trial profile, conforming to the Consolidated Standards of Reporting Trials guidelines.

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