Arterial occlusive lesion (AOL) scale
| AOL grade | Definition |
|---|---|
| Grade 0 | Complete occlusion of the primary occlusive lesion |
| Grade 1 | Incomplete or partial recanalization of the primary occlusive lesion with no distal flow |
| Grade 2 | Incomplete or partial recanalization of the primary occlusive lesion with any distal flow |
| Grade 3 | Complete recanalization of the primary occlusive lesion with any distal flow |