(i) Single stenosis ≤10 cm in length (ii) Single occlusion ≤5 cm in length
Type B
(i) Multiple lesions, each ≤5 cm (ii) Single stenosis or occlusion ≤15 cm (iii) Single or multiple lesions in the absence of tibial vessels (iv) Heavily calcified occlusion ≤5 cm (v) Single popliteal stenosis
Type C
(i) Multiple stenosis or occlusions totaling ≥15 cm (ii) Recurrent stenosis or occlusions that need treatment
Type D
(i) Chronic total occlusions of common femoral artery or superficial femoral artery (ii) Chronic total occlusion of popliteal artery
