The number of patients with lower extremity vascular occlusion for various reasons is increasing, and accordingly the number of patients undergoing lower extremity vascular surgery is also increasing. Many patients think that they have already had the surgery and the disease is completely cured. This is just like a water pipe blocked by scale, after unblocking or replacing the water pipe, it may be blocked by scale again. Stents and artificial blood vessels are foreign bodies to the body, and platelets and other clotting substances in the blood can clot on their surfaces and form thrombi and then block the vascular pathways. Therefore, if you do not take precautions after surgery, there is a possibility that the already unblocked blood vessels will be blocked again and the surgery will be abandoned. So what should patients pay attention to after lower limb vascular surgery? Specifically, there are the following points: 1. Patients should understand the causes of their lower limb vascular lesions, and should consciously adopt appropriate preventive and therapeutic measures for the causes. Such as elderly patients often occur because of lower limb arteriosclerosis and vascular occlusion, which should pay attention to control hypertension, diabetes and hyperlipidemia, daily diet to strive to light, smoking patients to completely quit smoking, increase walking exercise, and promote the establishment of lower limb collateral circulation. For patients with vasculitis, smoking is the cause of vasculopathy, so you must be determined not only to completely quit smoking, but also to eliminate the inhalation of secondhand smoke, otherwise any treatment will not help. 2, stents and artificial blood vessels, because they are foreign bodies, are prone to induce thrombosis and block the already unblocked blood vessels in the lower limbs. Therefore, taking anticoagulant drugs or antiplatelet drugs for a long time after surgery can help keep the blood vessels of the lower limbs open. Commonly used medications include warfarin, poliovirus and aspirin. Warfarin has a definite anticoagulant effect, but it varies greatly among individuals, so it is important to go to the hospital regularly for blood tests to determine the prothrombin time and adjust the drug dose accordingly. For patients undergoing artificial vascular surgery, lifelong warfarin is recommended. Patients undergoing stent surgery should take Poliovel, which has a strong anti-platelet aggregation effect and, together with aspirin, can effectively reduce the chance of in-stent thrombosis. The medication should be taken for at least six months. And aspirin should be taken for life. 3, stents and artificial blood vessels are not resistant to external compression, stent fracture, artificial blood vessel collapse are easy to promote thrombosis, resulting in vascular occlusion. Attention should be paid to keeping the lower limbs in an extended state to reduce the increase in resistance to blood flow due to excessive limb flexion. Squatting is most likely to cause increased resistance to blood flow in the arteries of the lower extremities, slowing down blood flow and thus causing thrombosis in the blood vessels. Some places in the north like to use squatting pits, should avoid using this commode, but should be used to sit on the toilet. When sitting in a long-distance car, attention should be paid to frequent walking to speed up blood flow in the lower limbs. When sitting in the usual position, you should be careful not to cross your legs, especially not to press that limb of the operation on the other leg, because the pressure, it is very easy to cause increased vascular resistance, thus inducing thrombosis. 4. Attention should be paid to the treatment of tinea pedis, which can easily cause skin breakage and trigger inflammation of the lymphatic vessels of the lower limbs. Bacteria can grow very easily on the surface of the artificial vessels and are difficult to kill with drugs, and once the artificial vessels become infected, it can cause abscess formation on the surface of the artificial vessels and the artificial vessels to be exposed. Invasion of the anastomosis can rupture the anastomosis and endanger the life and the safety of the limb. Pay attention to keep the skin of the lower limb clean, which can effectively reduce the invasion of bacteria. 5. You should go to the hospital regularly for examination to detect stent or artificial vessel restenosis as early as possible. If you feel that the walking distance of the lower limb is shortened and the symptoms are aggravated, you should go to the hospital promptly. Early detection and early treatment can help avoid the reoccurrence of lower limb ischemia.