A New Way to Wrap: Innovative ADM Braxon Packaging Technique Reduces Seroma in Prepectoral Breast Reconstruction.

Background: In recent years, prepectoral implant-based breast reconstruction supported by acellular dermal matrices (ADMs) has become an increasingly adopted alternative to submuscular techniques. Although this approach can improve patient comfort and aesthetic outcomes, fluid accumulation around the implant remains one of the most frequent and clinically relevant complications. Our unit progressively modified the handling and wrapping of the Braxon® ADM with the aim of optimizing pocket configuration and reducing seroma formation. Methods: We performed a retrospective analysis of consecutive patients who underwent immediate prepectoral, direct-to-implant breast reconstruction with Braxon® ADM at our institution between October 2019 and January 2025. Two techniques were compared: a standard full-wrap configuration and a modified approach in which the posterior ADM sheet is trimmed and only anterior coverage is maintained, with fenestrations created in the anterior wall. Clinical data and postoperative complications, including seroma rates, were recorded and compared between groups. Categorical variables were summarized as counts and percentages, and continuous variables as means and standard deviations. The primary comparison between techniques was performed on the presence of at least one postoperative complication using Fisher's exact test, and odds ratios (OR) with 95% confidence intervals (CI) were calculated where appropriate. A p-value <0.05 was considered statistically significant. Results: A total of 138 direct-to-implant prepectoral reconstructions were included, 90 performed with the standard full-wrap technique and 48 with the modified wrapping approach. The overall complication rate was 27.8% (25/90) in the standard group and 10.4% (5/48) in the new-technique group. Seroma occurred in 8 patients (8.9%) in the standard group and in 1 patient (2.1%) in the modified-technique group. Fisher's exact test demonstrated a significantly lower overall complication rate in the modified-technique cohort (10.4% vs. 27.8%; p = 0.02; OR 3.31; 95% CI 1.18-9.31), indicating that patients treated with the standard technique had approximately 3.3-fold higher odds of developing at least one complication than those treated with the modified technique. Conclusions: Anterior-only ADM coverage with selective trimming of the posterior sheet and fenestration of the anterior wall appears to reduce complications, particularly seroma, in ADM-assisted prepectoral breast reconstruction. Small technical refinements in ADM handling and pocket configuration, combined with a structured drainage protocol, may substantially improve postoperative outcomes in this setting.