Biomaterial Database

Calculation of the permeability of the blood-retinal barrier to fluorescein. 1985

H Lund-Andersen, and B Krogsaa, and J Larsen

A method is presented, for calculation of the permeability of the blood-retinal barrier to fluorescein which is based upon simultaneous determination of the free fluorescein concentration in plasma and the fluorescein concentration profile in the vitreous body. By aid of a simplified mathematical model of the eye the blood-retinal barrier permeability is calculated automatically on a computer from corresponding values of the fluorescein concentration in plasma and in the vitreous body. The present method eliminates some of the factors of uncertainty, which have been present in earlier applied fluorophotometric methods, thus contributing to increasing the exactness of the fluorophotometric method for the estimation of the permeability of the blood-retinal barrier to fluorescein. Apart from the permeability of the barrier, the diffusion coefficient for fluorescein in the vitreous body is also estimated by the present method.

UI	MeSH Term	Description	Entries
D008722	Methods	A series of steps taken in order to conduct research.	Techniques,Methodological Studies,Methodological Study,Procedures,Studies, Methodological,Study, Methodological,Method,Procedure,Technique
D008954	Models, Biological	Theoretical representations that simulate the behavior or activity of biological processes or diseases. For disease models in living animals, DISEASE MODELS, ANIMAL is available. Biological models include the use of mathematical equations, computers, and other electronic equipment.	Biological Model,Biological Models,Model, Biological,Models, Biologic,Biologic Model,Biologic Models,Model, Biologic
D002199	Capillary Permeability	The property of blood capillary ENDOTHELIUM that allows for the selective exchange of substances between the blood and surrounding tissues and through membranous barriers such as the BLOOD-AIR BARRIER; BLOOD-AQUEOUS BARRIER; BLOOD-BRAIN BARRIER; BLOOD-NERVE BARRIER; BLOOD-RETINAL BARRIER; and BLOOD-TESTIS BARRIER. Small lipid-soluble molecules such as carbon dioxide and oxygen move freely by diffusion. Water and water-soluble molecules cannot pass through the endothelial walls and are dependent on microscopic pores. These pores show narrow areas (TIGHT JUNCTIONS) which may limit large molecule movement.	Microvascular Permeability,Permeability, Capillary,Permeability, Microvascular,Vascular Permeability,Capillary Permeabilities,Microvascular Permeabilities,Permeabilities, Capillary,Permeabilities, Microvascular,Permeabilities, Vascular,Permeability, Vascular,Vascular Permeabilities
D005452	Fluoresceins	A family of spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one derivatives. These are used as dyes, as indicators for various metals, and as fluorescent labels in immunoassays.	Tetraiodofluorescein
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D012171	Retinal Vessels	The blood vessels which supply and drain the RETINA.	Pecten Oculi,Retinal Vasculature,Retinal Blood Vessels,Retinal Blood Vessel,Retinal Vasculatures,Retinal Vessel,Vasculature, Retinal,Vessel, Retinal,Vessel, Retinal Blood
D014822	Vitreous Body	The transparent, semigelatinous substance that fills the cavity behind the CRYSTALLINE LENS of the EYE and in front of the RETINA. It is contained in a thin hyaloid membrane and forms about four fifths of the optic globe.	Vitreous Humor,Bodies, Vitreous,Body, Vitreous,Humor, Vitreous,Humors, Vitreous,Vitreous Bodies,Vitreous Humors
D019793	Fluorescein	A phthalic indicator dye that appears yellow-green in normal tear film and bright green in a more alkaline medium such as the aqueous humor.	Fluorescein Sodium,Sodium Fluorescein,C.I. 45350,Colircusi Fluoresceina,D & C Yellow No. 7,D & C Yellow No. 8,D and C Yellow No. 7,D and C Yellow No. 8,D&C Yellow No. 7,D&C Yellow No. 8,Diofluor,Disodium Fluorescein,Fluor-I-Strip A.T.,Fluorescein Dipotassium Salt,Fluorescein Disodium Salt,Fluorescein Monosodium Salt,Fluorescite,Fluorescéine sodique Faure,Fluorets,Ful-Glo,Funduscein,Minims Fluorescein Sodium,Minims Fluoresceine,Minims Stains,Optifluor Diba,Uranine,Dipotassium Salt, Fluorescein,Disodium Salt, Fluorescein,Fluor I Strip A.T.,Fluorescein Sodium, Minims,Fluorescein, Disodium,Fluorescein, Sodium,Fluoresceina, Colircusi,Fluoresceine, Minims,Ful Glo,Monosodium Salt, Fluorescein,Sodium, Fluorescein

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