fundus fluorescein angiography

Fundus fluorescein angiography is an examination in which a dye that produces a fluorescent effect is rapidly injected into a blood vessel, and an ophthalmoscope or a fundus camera with a color filter is used for observation or photographing. Basic Information Specialist Category: Ophthalmic Examination Category: Physical Examination Applicable gender: whether men and women apply fasting: not fasting Tips: Inappropriate people: Have a history of cardiovascular or liver disease, allergic reactions to drugs. Normal value Because the dye can dynamically delineate the shape of the blood vessels when running with the blood flow, and the fluorescence phenomenon, the contrast and visibility of the blood vessels are improved, and some fine blood vessel changes are recognized; the blood supply pathway and blood vessel morphology of the choroid and the retina Different, angiography can distinguish the lesions of the two layers of tissue; choroidal fluorescence can set off the retinal pigment epithelium; damage to the barrier of the blood vessel wall, pigment epithelium and retinal inner membrane can cause the dye to leak, so It can be found that many single-use ophthalmoscopes can't find out, and the fluorescent fundus camera is used to take photos continuously, making the fundus examination results more objective, accurate and dynamic, thus providing clinical diagnosis, prognosis evaluation, treatment, therapeutic observation and pathogenesis. Valuable basis. Clinical significance Abnormal result Vitreous and intraretinal hemorrhage, exudation, mechanical membrane, tumor, degeneration. The retina of the population in need of examination is damaged. Precautions Taboo before inspection: eat spicy food. Requirements for inspection: Fully dilute the pupil. Inspection process Procedure: Perform in a dark room. First observe the condition of the fundus examination under the blue light wave, pay attention to the presence or absence of false fluorescence. In order to observe whether the patient has an allergic reaction to fluorescein, first take 10% of fluorescein sodium 0.5ml and add 4.5ml of sterile isotonic saline to be diluted. The test was slowly injected into the anterior elbow vein to ask the patient what the discomfort was. If there is no adverse reaction, you can change the syringe containing 10% sodium fluorescein 5ml or 20% fluorescein sodium 2.5~3ml into the elbow vein within 10 seconds. The injection should be fast, but it should not leak out. Sodium fluorescein quickly reaches a higher development concentration and must be timed at the beginning of the injection. Not suitable for the crowd Inappropriate people: Have a history of cardiovascular or liver disease and have an allergic reaction to the drug.

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