Search results
Results from the WOW.Com Content Network
The fluorescein is administered intravenously in intravenous fluorescein angiography (IVFA) and orally in oral fluorescein angiography (OFA). The test is a dye tracing method. The fluorescein dye also reappears in the patient urine, causing the urine to appear darker, and sometimes orange. [2] It can also cause discolouration of the saliva.
[4] [5] When given by mouth or injection into a vein it is used to help evaluate the blood vessels in the back of the eye during fluorescein angiography. [3] [6] When applied to the surface of the eye, side effects may include a brief period of blurry vision and discoloration of contact lenses of the soft type.
Fluorescein drops being instilled for an eye examination. Intravenous or oral fluorescein is used in fluorescein angiography in research and to diagnose and categorize vascular disorders including retinal disease, macular degeneration, diabetic retinopathy, inflammatory intraocular conditions, and intraocular tumors.
The most common angiographic techniques were fluorescein (FA) or indocyanine green angiography (ICGA), which both involve the use of an injectable dye. Intravenous dye injection is time-consuming and can have adverse side effects.
Fluorescein angiography (FA) is a useful adjunct in the workup of someone suspected to have cone dystrophy, as it may detect early changes in the retina that are too subtle to be seen by ophthalmoscope. For example, FA may reveal areas of hyperfluorescence, indicating that the RPE has lost some of its integrity, allowing the underlying ...
A fluorescein angiography test may be conducted, in which a fluorescent dye is often injected into the patient's bloodstream beforehand so the administering ophthalmologist can have a more detailed view and examination on the blood vessels in the retina. [8] The fluorescent dye can have dangerous side effects: see Fluorescein
If the patient is allergic to the contrast medium, much more serious side effects are inevitable; however, with new contrast agents the risk of a severe reaction is less than one in 80,000 examinations. Additionally, damage to blood vessels can occur at the site of puncture/injection, and anywhere along the vessel during passage of the catheter.
Fluorescein angiography uses injection of a fluorescein dye to image the back of the retina. It is a commonly used technique but it has a large number of side effects, including nausea in one fifth of patients and in some cases death from anaphylaxis. [20]