Abstract
Background:Major infectious complications after implant-based postmastectomy reconstruction commonly occur late (>30 days postoperative). We set out to determine if early expander-to-implant exchange (3–6 weeks after tissue expander placement) reduced rates of subsequent major infectious complications.Methods:We retrospectively examined patients after mastectomy and tissue expander reconstruction followed by early expander-to-implant exchange versus exchange at least 6 months after initial tissue expander placement (the control group). Multivariate logistic regression analysis was performed to determine whether the timing of implant exchange independently predicted major infectious complications occurring more than 30 days after initial tissue expander placement after adjusting for differences in patient variables between groups.Results:In total, 252 consecutive patients (430 breasts) between August 2014 and October 2019 were included. While the rates of major early infectious complications after mastectomy and tissue expander placement were similar between the groups, the control group had more subsequent major infectious complications during the reconstructive process [9.8% (n = 22) versus 1.9% (n = 4), P < 0.001].Conclusions:Early implant exchange results in a reduced subsequent rate of major infectious complications. This protocol reduces the window of time for late infectious complications to develop by proceeding with exchange within 6 weeks of tissue expander placement instead of the standard 6 months, which is common practice. We hypothesize that early exchange allows for washout of the mastectomy cavity, eliminating indolent bacterial contamination that could have subsequently manifested as a late infection. This protocol also obviates the need to operate on patients that undergo post-mastectomy radiotherapy, which also reduces reconstructive failure rates.
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