Use of Tapered Balloons to Recanalize Occluded Below-the-Knee Arteries in Diabetic Patients with Critical Limb Ischemia

Abstract

The aim of this study was to evaluate the outcome of tapered balloon use in recanalization of long occlusions of below-the-knee (BTK) arteries in diabetic patients with critical limb ischemia (CLI). Forty-nine occluded BTK arteries in 35 diabetic patients with CLI were revascularized in our Diabetic Foot Center between January and September 2014 using tapered balloons. Twelve-month outcomes were evaluated in terms of healing of the lesions, survival, limb salvage, primary patency, primary assisted patency, and secondary patency. The patients were predominantly male (27/35, 77.1%) with a mean age of 70.9years (±10.3 standard deviation [SD]). During the follow-up (mean duration 12.4months±4 SD), healing of the lesions was obtained in 27 of the 35 cases (77.1%). Estimated 12-month survival and limb salvage were 85.7% and 91.1%, respectively. Estimated 12-month primary patency, primary assisted patency, and secondary patency were 78.3%, 79%, and 88.9%, respectively. Univariate analysis demonstrated that the presence of chronic renal failure affected survival (P=0.005), and assignment to Rutherford class 6 affected limb salvage (P=0.005), primary patency (P<0.001), and primary assisted patency (P<0.001). Furthermore, the presence of coronary artery disease affected primary patency (P=0.001) and primary assisted patency (P=0.05). Tapered balloons are a safe and effective means to recanalize long occlusions of BTK arteries in diabetic patients with CLI. Outcomes are poorer in patients with major tissue loss and with a history of coronary artery disease. Further experience with larger groups is needed to validate these outcomes.