Arteriosclerosis obliterans of lower extremities (arteriosclerosis obliterans, ASO) is a common and frequently-occurring disease in middle-aged and elderly people, and also an important manifestation of atherosclerosis in lower extremities.ASO is reported to be present in approximately 12%-14% of the population, increasing to 20% of the population over the age of 75.The current treatment methods of ASO include pharmacotherapy, surgical procedures, endovascular treatment, combined surgery, and autologous peripheral blood stem cell transplantation (ASCT), etc.Endovascular treatment of ASO for lower limbs has the advantages of safety, effectiveness and fewer complications, and has become the preferred treatment for ASO.Endovascular treatment mainly includes: percutaneous transluminal angioplasty (PTA) and bare stent implantation. Currently, the most commonly used surgical options include: ordinary balloon dilatation + drug-coated balloon (DCB) dilatation + bare stent implantation.A number of studies have proved that DCB and bare stent are more effective than common PTA, but postoperative restenosis in ASO is always a difficulty.In addition to the chronic total occlusion or diffuse lesion of the lower extremity arteries, the inferior genicular artery outflow channel, age, diabetes, hemodialysis and critical limb ischemia are all related.Matsumi J, et al. found that patency of the inferior genicular artery may be an important predictor of adverse events after the SMART stent implantation in patients with popliteal artery disease, and the preservation of the distal outflow tract may be beneficial to reduce the rate of restenosis Early analysis of the patency rate of inferior genicular artery bypass found that poor outflow tract could lead to an increase in bypass thrombosis events.Matsumi J,et al. found that patency of the Early analysis of the patency rate of inferior genicular artery bypass found that poor outflow tract could lead to an increase in bypass thrombosis events. may be an important predictor of adverse events after SMART stent implantation in patients with popliteal artery disease, and the preservation of the distal outflow tract may be beneficial to reduce the rate of restenosis.Daniel M et al. conducted a retrospective analysis of 95 patients with femoral popliteal artery stent implantation and found that,for patients with poor subgenual artery outflow tract, the number of additional inferior genicular artery during femoral artery stent implantation usually leads to better clinical outcomes.the number of inferior genicular artery shown by preoperative angiography is an independent predictor of post-stent clinical outcomes.This study demonstrates the importance of distal outflow tract clinical outcomes after stent implantation.Yusuke W,et al. conducted a retrospective study on 199 patients with chronic popliteal artery occlusion and found that additional inferior genicular artery opening during stent implantation was beneficial to the patency rate of the stent and clinical results .However, the current analysis of the influence of the tibial run off on the femoral popliteal patency is mainly a retrospective study.

The purpose is to evaluate the patency of the tibial run off through a prospective multicenter observational real world study, whether it has an impact on the therapeutic effect after endovascular treatment in femoral popliteal artery , and whether one-stage reconstruction of the tibial run off can improve the postoperative patency rate of endovascular treatment.