Arteriography, coronary arteriography, cerebral arteriography, lower limb arteriography, etc., all need to be carried out before the perfection of the imaging examination, there is no contraindication to carry out arterial puncture, feeding catheter, injection of contrast medium, so as to make the blood vessels visualized. After the operation, pay attention to the wound dressing to avoid bleeding. Take coronary arteriography as an example, patients need to check blood routine, coagulation routine, biochemistry, AIDS antibody, immunity eight and other laboratory tests, check the cardiac ultrasound, electrocardiogram, chest CT, if there is no contraindication, it can be arranged to carry out the imaging. Caution is needed if the patient has fever, liver or kidney failure, anemia, or gastrointestinal bleeding. Coronary angiography and other imaging need to be performed in the hospital’s catheterization room. Coronary angiography is performed by puncturing the radial artery, placing a sheath tube, and sending a contrast catheter down the sheath tube, which is delivered to the mouth of the coronary artery, where a contrast agent is injected, while turning on the X-rays of the angiography machine so that the coronary blood vessels can be visualized. The examination bed is moved so that the coronary vessels can be displayed clearly from multiple angles. The patient is awake throughout the procedure and is not in discomfort. After the examination, the catheter is withdrawn, the sheath is removed, the wound is bandaged with gauze for pressure, and the patient returns to the ward. Note that the pressure is gradually loosened about 1 hour after the imaging, and can be removed the next day. This is the general process of coronary angiography, if the patient’s diabetes oral metformin, you need to stop taking drugs for 3 days before the operation. The above operations need to be carried out under the guidance of specialized physicians.