Usefulness of the Symphony^TM Nitinol Stent for Arteriosclerosis Obliterans

Abstract

The Symphony Peripheral Stent^TM is a self-expanding stent made of thermal memory Nitinol wire. Stents were implanted in 39 lesions of 32 patients (26 men, 6 women) with atherosclerosis obliterans (ASO). The ankle - arm index (AAI), and vessel diameters evaluated by quantitative angiography were compared before and 6 months after treatment. Symphony Peripheral Stent^TM implantation significantly improved the AAI from 0.50±0.4 to 0.9±0.2 (p<0.01), the minimum lumen diameter (MLD) from 2±1.5 to 5±1.4 mm (p<0.01) and percent diameter stenosis (% DS) from 69±20% to 16.5±8% (p<0.01). Re-evaluation of 33 of the 39 lesions 6 months after treatment revealed a low restenosis rate of 15%, an AAI of 0.8±0.3, MLD of 4.5±2 mm and %DS of 30±22%, so the Symphony Peripheral Stent^TM is thus a promising choice for patients with ASO. (Circ J 2002; 66: 1000 - 1002)