• Shannon L Cramm, Dionne A Graham, Christina Feng, Myron Allukian, Martin L Blakely, Nicole M Chandler, Robert A Cowles, Shaun M Kunisaki, Aaron M Lipskar, Robert T Russell, Matthew T Santore, Brendan T Campbell, Sarah J Commander, Jennifer R DeFazio, Katerina Dukleska, Justice C Echols, Joseph R Esparaz, Claire Gerall, Cornelia L Griggs, David N Hanna, Katherine He, Olivia A Keane, Sean E McLean, Elizabeth Pace, Stefan Scholz, Shelby R Sferra, Elisabeth T Tracy, Lucy Zhang, Shawn J Rangel, and Eastern Pediatric Surgery Network.
• Department of Surgery, Boston Children's Hospital, Harvard Medical School, Boston, MA.
• Ann. Surg. 2024 Jun 1; 279 (6): 107010761070-1076.

ObjectiveTo compare rates of postoperative drainage and culture profiles in children with complicated appendicitis treated with the 2 most common antibiotic regimens with and without antipseudomonal activity [piperacillin-tazobactam (PT) and ceftriaxone with metronidazole (CM)].BackgroundVariation in the use of antipseudomonal antibiotics has been driven by a paucity of multicenter data reporting clinically relevant, culture-based outcomes.MethodsA retrospective cohort study of patients with complicated appendicitis (7/2015-6/2020) using NSQIP-Pediatric data from 15 hospitals participating in a regional research consortium. Operative report details, antibiotic utilization, and culture data were obtained through supplemental chart review. Rates of 30-day postoperative drainage and organism-specific culture positivity were compared between groups using mixed-effects regression to adjust for clustering after propensity matching on measures of disease severity.ResultsIn all, 1002 children met the criteria for matching (58.9% received CM and 41.1% received PT). In the matched sample of 778 patients, children treated with PT had similar rates of drainage overall [PT: 11.8%, CM: 12.1%; odds ratio (OR): 1.44 (OR: 0.71-2.94)] and higher rates of drainage associated with the growth of any organism [PT: 7.7%, CM: 4.6%; OR: 2.41 (95% CI: 1.08-5.39)] and Escherichia coli [PT: 4.6%, CM: 1.8%; OR: 3.42 (95% CI: 1.07-10.92)] compared to treatment with CM. Rates were similar between groups for drainage associated with multiple organisms [PT: 2.6%, CM: 1.5%; OR: 3.81 (95% CI: 0.96-15.08)] and Pseudomonas [PT: 1.0%, CM: 1.3%; OR: 3.42 (95% CI: 0.55-21.28)].Conclusions And RelevanceThe use of antipseudomonal antibiotics is not associated with lower rates of postoperative drainage procedures or more favorable culture profiles in children with complicated appendicitis.Copyright © 2023 Wolters Kluwer Health, Inc. All rights reserved.

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