Angiography of cerebral vessels: indications for
Angiography of cerebral vessels relates to high-tech methods of diagnosis, which has many advantages compared to x-rays. Angiography allows to assess the condition of veins, arteries, capillaries and lymphatic vessels. This result is achieved thanks to the introduction of vessels, a special radiopaque substance.
Angiography of cerebral vessels used in the suspicion of the following diseases:
- stenosis of the brain vessels and neck;
- atherosclerosis of brain vessels and neck;
- thrombosis of brain vessels and neck;
- aneurysms of the arteries;
- traumatic brain injury;
- increased intracranial pressure;
- epileptic seizures;
- severe headaches;
- the presence of tumors, hematomas and cysts in the brain.
Conducting such a study is indicated for patients who have an operation on the brain. However, this procedure has some contraindications:
- cardiac, renal and liver failure;
- severe mental disorders;
- allergic reaction to iodine and substances used to carry out the study;
- problems with blood clotting;
- pregnancy and breast-feeding.
The types of angiography
There are 2 types of angiography:
The execution engine
Before procedure it is necessary to establish the steady pulse of the patient. For this patient should receive beta-blocker and a vasodilator drug (if necessary). CT angiography of blood vessels of the brain begins with the fact that the patient lies on a special table, and his head fixed. Radiologist is behind glass.
The examinee is administered a contrast agent, and after a while start to perform angiography. To the results of the study were accurate, the patient should follow the doctor’s recommendations. Thanks to a special device, the health care provider and the subject can talk to each other during the procedure. For example, if the patient is suddenly not feeling well, he will instantly be able to inform the doctor.
When CT angiography is recommended to lie still because even the slightest movement can distort the results of the diagnostics. Periodically, the patient will be 10 seconds to hold the breath, following the instructions of the doctor. CT angiography of blood vessels of the brain takes less than an hour; the procedure is performed on an empty stomach, 6 hours after the last meal. After the procedure is recommended to drink abundantly in order to rentgenocontrast derived from the body, it will take a day. After the study, a patient may feel mild nausea, dizziness and pain at the site of venipuncture. If you experience an allergic reaction (rash, shortness of breath) should immediately contact the doctor.
- indicated for traumatic brain injuries;
- shows not only the blood vessels, and bones;
- minor radiation exposure;
- allowed if the patient has a metal prosthesis or vascular clips;
- the most informative preoperative diagnosis;
- minimally invasive.
- required rentgenocontrast;
- not suitable for children;
- there is a slight risk of worsening undiagnosed cancer.
The apparatus, which carried out Mr-angiography of the vessels of the head and neck, reminiscent of a large pipe in the shape of a cylinder with a magnet. The open machines suitable for patients with claustrophobia and obesity. 5 hours before the procedure you should not eat if you plan the introduction of roentgenocontrast.
All metal objects (watches, body piercing, jewelry, gadgets) you need to remove (to put). The man laid on the angiography table, and the area surveyed vessels is placed a special coil connected to the apparatus. Mr-angiography of neck vessels and brain can be performed with the use of contrast, and without it. Duration can be 40 minutes, and the results are being prepared for a maximum period of 3 hours. During the Mr-angiography the patient must not move, otherwise the result will be distorted. After diagnosis, there are no adverse reactions.
- is no ionizing radiation;
- non-invasive method of investigation;
- visualization of the inner walls of blood vessels;
- the contrast agent used for the Mr angiography, hypoallergenic;
- suitable for imaging of soft tissues.
- not suitable for patients with metal implants;
- possible Allergy to the contrast material if it is entered.
The results of CT — and Mr-angiography have to be defined exclusively by the attending physician, which based on the data will determine the tactics of treatment of the patient.