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Outcomes of Gracilis Muscle Flaps in the Management of Groin Complications after Arterial Bypass with Prosthetic Graft.

BACKGROUND: This study details 2-year outcomes of a modified gracilis muscle flap (GMF) technique in providing tissue coverage for groin complications after arterial bypass surgery with synthetic graft.

METHODS: All patients who developed groin infections after lower extremity arterial bypass with synthetic graft who underwent a GMF technique were included from June 2014 to March 2017 from a prospectively collected, purpose-built institutional database. Modifications to the standard technique included identification of the muscle using ultrasound to ensure precise skip incisions, preservation of the segmental blood supply, widening of the tunnel through which the muscle is retroflexed, placement of a wound vacuum-assisted closure for healing, and lifelong antibiotics. Demographics, laboratory values, bypass procedure, length of stay (LOS), disposition, and 1-, 3-, 6-, 12-, and 24-month follow-up data were collected. Analysis was performed via descriptive statistics.

RESULTS: Over the 3-year study period, 22 patients underwent GMF after complications resulted from arterial bypass surgery. Types of bypass included aortobifemoral (32%), axillobifemoral (14%), femoral-femoral (23%), femoral-popliteal or mixed distal (27%), and thigh graft for dialysis (4%). Forty-five percentage of patients presented with graft infection, 50% with wound dehiscence, and 5% with graft disruption and bleeding. Only 23% of patients were candidates for sartorius muscle flap at the time of their initial procedure. The average case length was 64 + 19 min. Sixty-four percentage of patients were discharged home with home health care and the remainder to a skilled nursing facility. The average LOS was 6.1 + 3.4 days. Fifty-four percentages of wounds were healed at 1 month and 100% at 3 months with adjunctive vacuum-assisted closure therapy and lifelong antibiotics. Sixty percentage of patients were still alive at 24 months, with 33% of grafts still patent at that time. Median survival was 18.1 months, and median graft patency was 17.9 months.

CONCLUSIONS: GMF is a safe and effective treatment for groin complications after arterial bypass surgery with synthetic graft. Owing to its versatility, area of coverage, ease of use, and durability, it potentially should be considered as a primary form of muscle coverage for groin complications.

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