Arterial embolism is a clinical condition in which a blood clot or a foreign body that enters a blood vessel becomes an embolus that rushes with the blood flow and stops in an artery of similar caliber to the size of the embolus, causing arterial obstruction and acute ischemia. Characterized by rapid onset of symptoms, rapid progression and serious prognosis, arterial embolism is mainly caused by blood clots, in addition to air, fat, cancerous embolus and catheter fracture and other foreign objects can also become emboli. The main source of embolus 1, cardiac origin, such as rheumatic heart disease coronary atherosclerotic heart disease and bacterial endocarditis when the ventricular wall of the thrombus off; artificial heart valve on the thrombus off. 2, vascular origin such as aneurysm or artificial blood vessel lumen thrombus dislodgement; atherosclerotic plaque dislodgement. 3.Medical arterial puncture catheterization catheter fracture into a foreign body or endothelial tear secondary thrombosis and dislodgement, etc. Among them, cardiac origin is the most common. Embolus can be washed into the brain visceral and limb arteries generally stay in the arterial bifurcation in the peripheral arterial embolism in the lower limbs more common than the upper limbs, in order of the common femoral artery, common iliac artery N artery and abdominal bifurcation; in the upper limbs, in order of the brachial artery, axillary artery, and subclavian artery, the main pathological changes: early arterial spasm and later on, endothelial degeneration of arterial walls degenerative changes; the arterial lumen of the secondary thrombus formation; serious ischemic After – hours of tissue necrosis can occur muscle and nerve function loss.