Fluoresenssangiografia

Fluorescensangiografia, often abbreviated as FA, is a diagnostic imaging technique used in ophthalmology to visualize the blood vessels in the retina and choroid. It involves injecting a fluorescent dye, typically fluorescein sodium, into a vein in the patient's arm. As the dye circulates through the bloodstream, it reaches the blood vessels of the eye. A special camera equipped with a filter then captures a series of rapid photographs or a video recording of the eye as the dye travels through these vessels.

The fluorescence of the dye allows for detailed visualization of the retinal and choroidal vasculature. Abnormalities such as leakage from blood vessels, blockages, or the formation of new, abnormal blood vessels can be identified. This is particularly useful in the diagnosis and management of various eye conditions, including diabetic retinopathy, age-related macular degeneration (AMD), retinal vein occlusions, and choroidal neovascularization. The progression of these diseases can be monitored over time by repeating the fluorescensangiografia.

The procedure is generally safe, although potential side effects from the dye injection, such as nausea, itching, or dizziness, can occur. More serious allergic reactions are rare. Patients are advised to inform their doctor of any known allergies. The images obtained from fluorescensangiografia provide valuable information for ophthalmologists to make accurate diagnoses and plan appropriate treatment strategies to preserve vision.