Search results
Results from the WOW.Com Content Network
The first version of the LEA test was developed in 1976 by Finnish pediatric ophthalmologist Lea Hyvärinen, MD, PhD. Dr. Hyvärinen completed her thesis on fluorescein angiography and helped start the first clinical laboratory in that area while serving as a fellow at the Wilmer Eye Institute of Johns Hopkins Hospital in 1967.
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.
Upload file; Special pages ... Get shortened URL; Download QR code; Print/export Download as PDF; Printable version ... Redirect page. Redirect to: Fluorescein ...
For example, fluorescent angiography, a technique of analysis of circulation in retina is used for diagnosing various eye diseases. With modern fluorometers, capable of tracking single fluorescent molecules, it is possible to track migrations of single cells tagged by a fluorescent molecule (see fluorescein in biological research ).
Fluorescein is a dye which is taken up by damaged cornea such that the area appears green under cobalt blue light. [3] There is also a version that comes premixed with lidocaine. [4] [8] Fluorescein was first made in 1871. [9] It is on the World Health Organization's List of Essential Medicines. [10]
While conventional dye-based angiography is still the common gold standard, OCTA has been evaluated and used across many diseases. [4] [5] [25] OCTA was first introduced in clinical eyecare in 2014. [26] OCTA has applications in several diseases, including leading causes of blindness such as glaucoma [24] and age-related macular degeneration. [27]
Fluorescein-labelled probes can be imaged using FISH, or targeted by antibodies using immunohistochemistry. The latter is a common alternative to digoxigenin, and the two are used together for labelling two genes in one sample. [23] Fluorescein drops being instilled for an eye examination
Angiography is a process of photographing/recording vascular flow within the retina and surrounding tissue by injecting a fluorescent dye into the blood stream. This dye fluoresces a different colour when light from a specific wavelength (excitation colour) reaches it.