Assessing Second Debridement Timing and Mortality in Necrotizing Soft Tissue Infections.

Abstract

Patients with necrotizing soft tissue infection undergo an average of 4-5 debridements per hospital admission. Optimal timing for initial debridement is emergent. Second debridement is universally recommended to occur within 24hours of the first, but no studies have successfully evaluated this time frame. Prior work has suggested that delays in second debridement are associated with increased mortality, and that few patients receive second debridement within 24hours. We performed a retrospective cohort study at a single center from 01/01/08 to 09/01/2021. The explanatory variable was whether the subject received second debridement within 24hours of initial debridement. The primary outcome was in-hospital mortality. Baseline characteristics were collected. Subjects were stratified into 2 groups by time between first and second debridement: <24 and ≥24hours. Variables were compared using Fisher's exact and Wilcoxon rank-sum tests. 77 patients met inclusion criteria. The median overall time to second debridement was 40 hours. 12 subjects received second debridement within 24hours (15.6%). There was no difference in in-hospital mortality between the <24 (n = 3, 25.0%) and ≥24-hour second debridement groups (n = 4, 6.2%; P = .07). The 2 groups did not differ by secondary outcomes, including total number of debridements, ICU LOS, or wound closure. No difference in mortality was observed between subjects undergoing second debridement within 24 vs after 24hours. Only 16% of subjects received second debridement within the recommended 24-hour time interval. Further study is required to identify the optimal timing of second debridement.