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selective angiography |
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selective angiography,
a radiographic procedure that allows selective visualization of the aorta, the major arterial systems, or a particular vessel. It is performed after a few milliliters of a radiopaque contrast medium has been injected through a percutaneous catheter. The patient is observed for signs of sensitivity to the contrast medium, including chills, tremor, and shortness of breath. After the procedure the catheter is withdrawn, and pressure is placed on the puncture site to prevent bleeding. Blood pressure is checked every 15 minutes for 2 hours. angiography radiological demonstration of certain areas of the vascular system by the injection of a radiopaque solution (arteriography, lymphangiography or phlebography). brain angiography radiography of the cranium after the intravenous injection of a radiopaque substance. An area of poor vascularity indicates the presence of a space-occupying lesion in the brain. fluorescein angiography intravenous fluorescein can be visualized in retinal and iris vasculature with the use of blue filters and direct or indirect ophthalmoscopy or photography. See also vitreous fluorophotometry. nonselective angiography injection of contrast material into a regional vessel or the general circulation. orbital angiography contrast study of the arteries of the orbit, particularly the malar, infraorbital, maxillary and dorsal orbital, using the infraorbital artery for injection of a suitable medium. pulmonary angiography demonstration of pulmonary veins and arteries by introduction of contrast material into the jugular or cephalic vein or via a catheter positioned in the pulmonary artery. renal angiography outlines renal blood flow, usually via a catheter introduced into the femoral artery and passed retrograde into the aorta to the vicinity of the renal arteries. selective angiography placement of the catheter in the vessel or heart chamber being studied in order to provide the best possible contrast study of the suspected lesion. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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