Fluorescein angiography, fluorescent angiography, or fundus fluorescein angiography is a technique for examining the circulation of the retina and choroid using a fluorescent dye and a specialized camera.
Indications for the test: Some of the common indications for this test include:
The patient is advised to come to the hospital with an attendant. It is ideal to avoid eating anything for at least 2 hours prior to the procedure. Eye drops are applied to dilate the pupil. Any history of allergy to medicines must be revealed to the Doctor.
After the procedure the skin and urine turns orange for about 48 hours. Drinking more amount of water helps in rapid removal of the dye from the body. As the dye is usually flushed out of the body through urine, this test is either avoided or done after taking a nephrologist (kidney specialist) opinion in patients with known kidney problems. Sometimes patients can develop rash, itching or tingling sensation. Mild anti histaminic drugs help to overcome this situation. Very rarely a severe allergic reaction causing breathing difficulty may be encountered which must be tackled on an emergency basis. Hence any knowledge of prior history of allergy must be shared with the doctor.
After the procedure the doctor will examine the pictures and decide on the clinical
This test is similar to FFA. It is sometimes used to complement the information gathered from FFA. Information regarding choroidal vessels are obtained in greater detail than FFA by this test. The dye used is Indocyanine green which fluoresces in Infra-red spectrum of light. This property enables imaging even through blood, fluid or pigmentation.
Some of the indications for the test include:
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