Q: What are the characteristics of vascular lesions below the knee? A: Vascular lesions represented by ischemic diabetic foot are often characterized by extensive narrowing or occlusion of the arteries below the knee. Long segment occlusion is one of its characteristics, with poor collateral circulation and severe calcification. Q: Why is Deep Balloon Technology able to solve vascular lesions below the knee? A: “Deep balloon technology” uses equipment specifically designed for small vascular lesions below the knee, such as “Deep guidewire” and “Deep balloon”, which can pass well through the lesion The treatment is performed through the vascular segment. “In addition to its small diameter, the Deep Balloon also has good compliance and does not cause medical damage to the blood vessels while dilating the lesion. Q: Is it necessary to implant a stent after balloon dilation of the infrapopliteal vascular lesion? A: Generally speaking, it is not necessary to implant a stent after “Deep Balloon” dilatation of infrapopliteal vascular lesions, but in cases such as significant retraction after balloon dilatation or the formation of entrapment during treatment, a special stent called “Deep Stent” needs to be implanted. “It is the smallest caliber self-expanding stent available in the market and is specifically used for the treatment of infrapopliteal artery lesions. Q: What are the long-term results of interventional treatment for patients with “intermittent claudication”? A: The purpose of interventional treatment is to relieve the patient’s symptoms, reduce the amputation rate and improve the quality of life by reducing the plane of amputation. However, theoretically, there is still a possibility of restenosis and occlusion of the diseased vessel after interventional treatment. However, even if these stenoses and occlusions reoccur in the treated vessels, clinical improvement can still be achieved. This is because the collateral circulation in the lower extremity arteries has had time to fully develop after the intervention. Therefore, even if the stenosis or occlusion recurs, a significant number of patients do not require re-intervention because of the formation of collateral circulation. For the few patients in whom the collateral circulation is not sufficiently formed, re-intervention is required.