Abstract
To describe the angiographic characteristics of peripheral arterial disease (PAD) in persons with diabetic foot ulcers (DFUs) on dialysis treatment. The study is a retrospective analysis of patients with DFUs and PAD who had been referred to our diabetic foot clinic. All patients had been managed by a pre-set limb salvage protocol including revascularisation of the affected limb. Arterial lesions (stenosis between 50-99% and occlusions) were retrospectively evaluated through angiogram analysis. According to the presence or not of dialysis, patients were divided into two patient groups: renal-diabetic foot (RDF) and diabetic foot (DF). Distribution of PAD and immediate revascularisation outcome (technical revascularisation outcome) for RDF and DF were separately reported and compared. The sample included 239 patients: mean age was 71.8 years; 72.4% were male; 87.4% had type 2 diabetes; mean diabetes duration was 21.4 years; and the mean HbA1c was 63±22mmol/mol. The RDF group compared with the DF group reported higher numbers of vessels affected (n=5±1.6 versus 3.9±1.5, respectively, p<0.0001), greater involvement of the superficial femoral artery (90.2% versus 75.8%, respectively, p=0.003), the tibial-peroneal trunk (53.7% versus 25.5%, respectively, p=0.01), the anterior tibial artery (93.9% versus 80.9%, respectively, p=0.03) and below-the-ankle (BTA) arteries (70.7% versus 35.7%, respectively, p=0.0001). The RDF group showed a higher rate of revascularisation failure in comparison to DF patients (43.9% versus 15.3%, respectively, p<0.0001). BTA arterial disease (odds ratio 9.5; 95% Confidence Interval: 3.5-25.4; p=0.0001) resulted as the only independent predictor of revascularisation failure. In this study, RDF patients showed a widespread distribution of arterial lesions with a higher involvement of foot arteries in comparison with DF patients. BTA arterial disease was found to be an independent predictor of revascularisation failure.
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