What Is a Cerebral Angiogram?

Cerebral angiography is a brand new X-ray technique widely used in clinical practice since the 1990s. It uses iodine-containing contrast agents to inject the common carotid artery, internal and external carotid artery, and vertebral artery. Continuous DSA angiography shows the brain An imaging technique for the shape, location, distribution, and behavior of arteries, return veins, and sinuses. Cerebral angiography is divided into conventional cerebral angiography and digital subtraction cerebral angiography (DSA). Digital subtraction cerebral angiography has the advantages of simplicity and speed, clear vascular images, selective filming, and fewer complications. Therefore, conventional cerebral angiography has been replaced by digital subtraction cerebral angiography. Femoral or radial arterial intubation is currently used for whole brain angiography.

Basic Information

Chinese name

Cerebral angiography

Era of origin

the 90s

Attributes

X-ray inspection new technology

Display content

Show internal carotid arteries, vertebrobasilar arteries, etc.

Features

Cerebrovascular disease diagnosis

Field

Clinical medicine

Preparation before cerebral angiography

1. Explain the purpose of imaging and possible complications and accidents to patients and their families, and sign an imaging agreement;

2. Routine preoperative examinations: including blood and urine routines, time of bleeding and clotting, liver and kidney function, electrocardiogram and chest X-ray.

3. No food and drink for 8 hours before surgery. In special cases, such as emergency department, it can be shortened appropriately at the discretion of the anesthesiologist.

4. Iodine allergy test: 1 ml of contrast medium to be used for angiography, intravenous bolus, no allergic signs such as palpitation, shortness of breath, urticaria, and conjunctival congestion. Those with blood pressure pulsations below 10-20 mmHg before and after injection are negative. An iodine allergy test is not allowed for angiography.

5. Bilateral groin and perineal area for skin preparation, patients with long operation time should keep the catheter.

6. Intramuscular injection of phenobarbital 30min before surgery.

7. Continued intravenous administration of calcium antagonists 24 hours before the operation, as appropriate

Clinical significance of cerebral angiography

DSA can not only clearly display the internal carotid arteries, vertebrobasilar arteries, intracranial large blood vessels, and cerebral hemisphere blood vessels, but also measure the arterial blood flow, so it has been used in cerebrovascular disease examination, especially for arteries Qualitative localization diagnosis of tumors and arteriovenous malformations. It can not only provide the exact location of the lesion, but also clearly understand the scope and severity of the lesion, and provide a more reliable objective basis for surgery. In addition, it is also of high diagnostic value for ischemic cerebrovascular disease. DSA can clearly show the arterial lumen stenosis, occlusion, and the establishment of collateral circulation. For cerebral hemorrhage and subarachnoid hemorrhage, the cause of bleeding can be further investigated, such as aneurysms, arteriovenous malformations, arteriovenous fistulas, etc. . In short, DSA is an effective diagnostic method for the diagnosis of cerebrovascular disease.