Angiography: definition and purpose
Angiography - X-ray examination of blood vessels is.
Conventional studies on this method is characterized in that the blood vessels in the injected contrast agent - an organic iodine compound, without which the vessels on chest radiographs will not be visible. Angiography after physical examination of the patient, in cases where using other research methods to establish the diagnosis is not possible. Using angiography can identify defects in their development and damage (narrowing, aneurysms, malformations), violation of patency and defects and damage to various internal organs, malignant and benign.
Depending on the task isolated brain angiography, arteriography, venography, angiography of the heart, lymphography, fluorescein angiography.
Research vessels of the brain called the cerebral angiography - after the administration of contrast in a short time doing multiple angiograms displaying venous, arterial, capillary circulation phase. Angiography of the brain can be direct or indirect. Allocate carotid and vertebral direct cerebral angiography. The most frequently used method for carotid study - the contrast injected in the neck, the carotid artery. Vertebral cerebral angiography is characterized in that an iodine compound injected into vertebral artery. When indirect cerebral angiography for carotid or vertebral artery fit through another large vessel, for example through an artery in the thigh: a long catheter is introduced and injected contrast.
Arteriography - a method of diagnostics of the arteries, which allows to identify tumors, is located near the blood vessel blockage and narrowing of the arteries, high blood disorders.
Venography is prescribed for diseases of the veins in the hands and feet. The study allows us to see a picture deep-seated and superficial veins, their extent and localization, diagnose thrombosis or varicose. In some cases, venography administered to evaluate abnormalities of heart rhythm, heart failure determination.
For more information on heart disease angiography gives the heart - study, by which study chambers of the heart and arteries. Angiography of the heart in the therapeutic and diagnostic purposes. You can use it to identify the different pathology of blood vessels (thrombosis, contraction or expansion, blockage), to evaluate the blood pressure in the heart and pulmonary artery, myocardial contractility.
Lymphography performed to study the lymphatic system and is indicated for malignant tumors of the uterus and ovaries. Through this study we can estimate the degree of the disease and the effectiveness of chemotherapy or surgery to remove the lymph nodes.
Fluorescein angiography - a method of study of ocular fundus and vascular inflammations and degenerative processes in the retina and choroid, hypertension, diabetic retinopathy, glaucoma. Besides using fluorescence angiography study tabloid conjunctiva and iris in various diseases. In contrast, use as fluorescein sodium salt - 10% solution. Enter contrast of the vein at the elbow - 3-5ml, but before that reveal his tolerated.
Contraindications to angiography
It is impossible to carry out angiography in acute infections and inflammatory diseases in a serious condition, with mental illness, serious kidney, liver and heart failure, allergies to iodine.