The Trans-Atlantic Inter-Society developed a consensus (TASC) classification for atherosclerotic disease of the common femoral and popliteal arteries.
(1) unilateral vs bilateral
(2) length in cm
(3) number of lesions
(4) stenosis vs occlusion
(6) involvement of distal popliteal artery
(7) heavy calcification
single stenosis on left or right side, < 3 cm, in CFA or PA, not heavily calcified
single stenosis 3-10 cm long without involvement of distal popliteal artery
heavily calcified stenosis <= 3 cm in length
multiple stenosis or occlusions, each < 3 cm long
single or multiple lesions in the absence of continuous tibial runoff to improve inflow for distal surgical bypass
single stenosis or occlusion > 5 cm in length
multiple stenosis or occlusions, each 3-5 cm in length, with or without heavy calcification
complete common femoral artery occlusions
superficial femoral artery occlusions
complete popliteal and proximal trifurcation occlusions
• CFA = common femoral artery, PA = popliteal artery
• While Type 1 in the paper refers to bilateral disease, the remainder do not. In the implementation I will only refer to unilateral disease.
• Type 6 and Type 2 could overlap for a single stenosis 6 to 10 cm in length.
2, 3, 4 or 5
6 or, 7
To read more or access our algorithms and calculators, please log in or register.