Continuous local antibiotic perfusion for deep infection of the foot and ankle.

Background: This study aimed to report the outcome of deep infections of the foot and ankle, which are among the most challenging orthopedic conditions to treat, after continuous local antibiotic perfusion.

Methods: Eleven patients with deep foot and ankle infections were treated with continuous local antibiotic perfusion between January 2019 and March 2024. After surgical debridement, we performed continuous perfusion of high concentrations of gentamicin (60 mg/50 ml) directly into the infected bone and soft tissue for two weeks using bone marrow needles and double-lumen tubes. Patient characteristics, infection relapse, and adverse events were investigated.

Results: The mean age of the patients was 53 years (range 12-79 years), with six males and five females. The infections were controlled without additional surgeries in ten patients with a mean follow-up of 40 months (12-62 months). Two patients developed a fungal infection, of which one required an additional debridement surgery, and the other was treated with oral antifungal medication. No adverse events occurred due to high-concentration gentamicin.

Conclusions: Short-term infection control was achieved using continuous local antibiotic perfusion; thus, it can be a treatment option for deep infections of the foot and ankle.