Immediate Implant-based Breast Reconstruction with Acellular Dermal Matrix Compared with Tissue-expander Breast Reconstruction: Rate of Infection

BACKGROUND: The risk of infection continues to be a subject of discussion within the field of implant-based breast reconstruction. Studies have shown the feasibility of immediate single-stage procedures with acellular dermal matrix (ADM), yet 2-stage tissue expander techniques continue to be the procedure most often performed. The purpose of this study was to evaluate postoperative infections and to identify associated predictors. METHODS: A retrospective study at Papa Giovanni XXIII Hospital was conducted between 2013 and 2017. Patients’ demographic data were compared between single-stage and 2-stage procedures. Rate of infection and predictors were examined. Minor infections could be treated by oral antibiotics only, major infections required inpatient treatment. Healing was considered a successful treatment with antibiotics only, whereas any supplementary surgical intervention resulting in the preservation of an implant device was considered salvage. Breast reconstruction was defined a failure in case of implant loss or need for autologous reconstruction. RESULTS: Three hundred ninety-three patients underwent 336 monolateral and 57 bilateral implant-based breast reconstruction. Ninety-two patients had a submuscular direct-to-implant reconstruction with ADM with an infection rate of 11.4% compared with an infection rate of 7.8% among the 268 patients with a 2-stage tissue expander procedure. Beta-binomial regression showed obesity and preoperative radiotherapy as significant predictors for infection (OR, 4.65, P = 0.038, and OR, 7.13, P = 0.015, respectively). Average time of onset of infection among the submuscular direct-to-implant with ADM group was 67.1 days compared with 80.1 days among tissue-expander group with postoperative chemotherapy and preoperative radiotherapy having a significant effect on time of infection onset (P = 0.014, P = 0.034, respectively). CONCLUSIONS: Direct-to-implant breast reconstruction with ADM is a procedure with acceptable risks of infection in comparison to tissue expander procedures. A profound patient selection pre- and intraoperatively is the basis of successful breast reconstruction.