Risk of angiography

All medical operations have certain risks. Cerebrovascular angiography can be completed under local anesthesia, with simple operation, short time and relatively high safety. The possible risks are mainly local complications, systemic complications and neurological complications. Common local complications include puncture site bleeding, hematoma, vasospasm, thrombosis and so on. Systemic complications are usually allergic reactions to contrast agents, such as urticaria, nausea, vomiting, shock and renal damage, so preoperative routine iodine sensitization should be done. Currently, the commonly used nonionic organic iodine water contrast agent has the characteristics of low toxicity, low permeability and low viscosity, and can be quickly metabolized by the kidney, with significantly improved safety. The incidence of nervous system complications, including cerebral vasospasm, cerebral infarction, blindness, facial paralysis and nervous system damage, was only 0.6%-1.9%. Angiography is relatively safe, but a few patients can form hematoma in the neck puncture site, generally after a few days will gradually disappear.