When skin / soft tissue defects related to wound infection after total knee arthroplasty (TKA) occur, it is difficult to control infection and cover the defect site in many cases. We performed reconstruction with a gastrocnemius muscle medial head flap in 4 patients with post-TKA infection. After debridement of the wound site, the medial head of the gastrocnemius muscle was dissected at the distal aponeurotic region, and elevated. The muscle flap was turned over, and transferred to the patellar region. On the muscle flap, skin grafting was performed. After surgery, muscle flap / skin graft survival was achieved in all patients. There was no recurrence of infection, and improvement in the knee flexion function was achieved. Reconstruction with a gastrocnemius muscle flap for wound infection after TKA may be useful from the viewpoint of infection control, as the incidence of muscle collection-related functional disorder is low.
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