FA requires the use of a dedicated fundus camera equipped with excitation and barrier filters. Fluorescein dye is injected intravenously, usually through an antecubital vein with sufficient speed to produce high contrast images of the early phases of the angiogram. White light from a flash is passed through a blue excitation filter.

Fluorescein angiography (FA) is a great way to evaluate retinal circulation. Nowadays, OCT has greatly reduced the number of FAs performed, though FA still remains a very important modality for assessing many circulatory dysfunctions of the retina. FAs can be evaluated based on distinct phases of dye circulation.

2023年8月25日 · Fundus fluorescein angiography (FFA) is an invasive diagnostic procedure. It helps to assess the anatomy, physiology, and pathology of retinal and choroidal circulation. It aids in the diagnosis of various ocular pathologies. It contributes to decision-making when planning the management of ocular pathology. It is also useful as a teaching tool.

2021年8月20日 · This report will walk you through the fluorescein angiography (FA) procedure, indications, and results. It will also introduce you to FA’s sister procedures: indocyanine green angiography (ICGA) and fundus autofluorescence (FAF). These all serve as valuable tools for identifying and monitoring retinal pathology.

Phases of an Angiogram. Early Phase. The early phase of the angiogram can be divided into distinct circulation phases that are useful for interpreting the results: 1. Choroidal flush. In a normal patient, the dye appears first in the choroid approximately 10 seconds following injection.

Fluorescein angiography[1] (FA), fluorescent angiography (FAG), or fundus fluorescein angiography (FFA) is a technique for examining the circulation of the retina and choroid (parts of the fundus) using a fluorescent dye and a specialized camera.

FA phases: Choroidal Arterial Arteriovenous Venous Recirculation . What are the 5 phases in FA? Fluorescein Angiography

2001年11月12日 · Fluorescein angiograms progress through five phases: pre-arterial (choroidal flush), arterial, arteriovenous, venous and late recirculation. The process begins with injection of sodium fluorescein dye into the antecubital vein.

2014年9月27日 · Choroidal phase: begins 10 to 12 seconds after dye injection in young and 12 to 15 seconds after injection in older patients, early choroidal fluorescence is faint patchy and irregular called the choroidal flush. Areas of choroidal filling and non-filling become more distinct called patchy choroidal filling.

2024年5月29日 · Fluorescein angiography images of the included patients were analyzed with a focus on the timing of angiography phases, including choroidal flush, retinal, and recirculation phases. Gestational age, birth weight (BW), age at imaging, treatment choice, and any FA complications were documented.