Unveiling the Potential of Drain Tip Cultures: Impact on Surgical Site Infections in Implant-Based Breast Reconstruction.

Purpose: Surgical site infections (SSIs) remain a concern after implant-based breast reconstruction, despite preventive measures. These infections can have serious consequences. This study evaluated the correlation between drain tip culture results and SSIs in this patient population.

Methods: We analyzed data from patients who underwent implant-based breast reconstruction between July 2021 and May 2023. Drain tip cultures were collected, and any SSIs occurring within one month of surgery were documented. We then compared clinical data with the culture results.

Results: A total of 263 drain tip cultures were included. Notably, none of the 61 patients who underwent tissue expander removal and implant insertion had positive cultures. However, among the 202 patients who received tissue expanders or direct-to-implant procedures, 11 (5.45%) had positive cultures, with a total of 12 SSIs identified. Importantly, five of the 11 culture-positive wounds developed SSIs. Multivariate analysis revealed a significant two-way association between infection and positive drain tip cultures. For Staphylococcus aureus specifically, drain tip cultures showed excellent predictive value: sensitivity (33.33%), specificity (100%), positive predictive value (100%), and negative predictive value (95.96%).

Conclusion: Drain tip cultures from immediate implant-based breast reconstructions significantly correlated with SSIs. Close monitoring is crucial, especially when S. aureus is identified in the culture.