Flowchart diagram of the workflow and treatment of lesions above and below the knee in our institution. ALI, acute limb ischemia; ATK, above the knee; BTK, below the knee; Long lesion, >10 cm; Short lesion, ≤10 cm; PMT, percutaneous mechanical thrombectomy; PTA, percutaneous transluminal angioplasty; PAT, percutaneous aspiration thrombectomy.