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Endovascular therapy and free flap transfer in chronic limb-threatening ischemia.
Journal of Plastic Surgery and Hand Surgery 2022 November 27
Although revascularization has evolved, treating foot gangrene with chronic limb-threatening ischemia remains challenging. There have been many reports on bypass surgery and free flap transfer. Meanwhile, few studies have reported on endovascular therapy and free flap transfer, with high flap survival rates and high wound complication rates. Wound complications are a serious problem that can lead to limb amputation, but previous studies have failed to identify risk factors for wound complications. In this study, we evaluated the results of endovascular therapy and free flap transfer for chronic limb-threatening ischemia and analyzed risk factors for wound complications. A total of 31 legs from 28 patients who underwent endovascular therapy and free flap transfer for lower limb salvage between August 2016 and April 2020 were retrospectively reviewed. The primary endpoints were flap survival and limb salvage rates and wound complication rates. In addition, we performed a statistical analysis of risk factors for wound complications. The flap survival rate was 100%, with partial necrosis in 6% of the patients. The limb salvage rate was 100%. The wound complication rate was 45%. The multivariate analysis showed end-stage renal failure on dialysis as a significant risk factor for wound complications (odds ratio = 133, 95% confidence interval = 2.74-6430, p = 0.014). Endovascular therapy and free flap transfer in chronic limb-threatening ischemia achieved high flap survival rate and limb salvage, but had a high incidence of wound complications. We identified end-stage renal failure on dialysis was a significant risk factor for wound complications.
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