In life, it is likely that more diseases are prone to appear because of the rise of one’s age, especially the rising age, more and more diseases appear, more and more serious, so under what circumstances, endovascular stents will be applied to treat the disease? 1, vascular intervention therapy, for a variety of types of diseases, one is the tumor vascular intervention therapy, another is the diabetic foot and atherosclerotic plaques and other vascular stenosis of intervention therapy, vascular therapy is some anti-tumor drugs infusion and embolization-based. 2, the human blood vessels can be applied to interventional therapy, including cerebrovascular interventional therapy has been put stents or balloon dilatation-based, if patients with diabetic foot, because of the complications of diabetic patients, a large number of sugar molecules will be touched to the endothelium of the blood vessels will cause some damage. 3, the need for patients to first go to control their own diet, to take the method of lowering sugar and then balloon expansion after or put stents for treatment, in the treatment of many diseases before the need for patients to do a good job of pre-surgery preparation, so as to be able to get the best results of the operation. Different diseases we do vascular stenting will be very easy to appear more indications, but to go to a series of preparations to prevent the emergence of indications, these complications are likely to affect the results of our later treatment.