Biomaterial Database

Conjunctival transport of technetium-99m pertechnetate. 1979

T Sørensen, and F T Jensen

Using a gamma camera coupled to a computer and a tape unit the transport of pertechnetate (Tc99m) across the conjunctiva was determined by the 'region of interest' technique in human subjects. In 11 patients with their lacrimal sacs removed a fractional turnover rate of 0.021 min-1 was found. In 21 patients with inflammed conjunctiva due to chronic dacryocystitis a fractional turnover rate of 0.027 min-1 was found, whereas the value in 11 normal individuals was 0.015 min-1. Neglecting the relatively small transcorneal route of disappearance, the values found for technetium disappearance could be regarded as representative for the transconjunctival transport of the radioisotope. This assumption was confirmed by correlating the radioactivity in the blood with the fractional turnover rate.

UI	MeSH Term	Description	Entries
D007766	Lacrimal Apparatus Diseases	Diseases of the LACRIMAL APPARATUS.	Epiphora,Apparatus Disease, Lacrimal,Apparatus Diseases, Lacrimal,Disease, Lacrimal Apparatus,Diseases, Lacrimal Apparatus,Epiphoras,Lacrimal Apparatus Disease
D007767	Lacrimal Duct Obstruction	Interference with the secretion of tears by the lacrimal glands. Obstruction of the LACRIMAL SAC or NASOLACRIMAL DUCT causing acute or chronic inflammation of the lacrimal sac (DACRYOCYSTITIS). It is caused also in infants by failure of the nasolacrimal duct to open into the inferior meatus and occurs about the third week of life. In adults occlusion may occur spontaneously or after injury or nasal disease. (Newell, Ophthalmology: Principles and Concepts, 7th ed, p250)	Nasolacrimal Duct Obstruction,Tear Duct Obstruction,Duct Obstruction, Lacrimal,Duct Obstruction, Nasolacrimal,Duct Obstruction, Tear,Lacrimal Duct Obstructions,Nasolacrimal Duct Obstructions,Obstruction, Lacrimal Duct,Obstruction, Nasolacrimal Duct,Obstruction, Tear Duct,Tear Duct Obstructions
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
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
D011877	Radionuclide Imaging	The production of an image obtained by cameras that detect the radioactive emissions of an injected radionuclide as it has distributed differentially throughout tissues in the body. The image obtained from a moving detector is called a scan, while the image obtained from a stationary camera device is called a scintiphotograph.	Gamma Camera Imaging,Radioisotope Scanning,Scanning, Radioisotope,Scintigraphy,Scintiphotography,Imaging, Gamma Camera,Imaging, Radionuclide
D003228	Conjunctiva	The mucous membrane that covers the posterior surface of the eyelids and the anterior pericorneal surface of the eyeball.	Bulbar Conjunctiva,Palpebral Conjunctiva,Plica Semilunaris of Conjunctiva,Plicae Semilunares of Conjunctiva,Tunica Conjunctiva,Conjunctiva, Bulbar,Conjunctiva, Palpebral,Conjunctivas
D003607	Dacryocystitis	Inflammation of the lacrimal sac. (Dorland, 27th ed)	Dacryoadenitis,Dacryoadenitides,Dacryocystitides
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000293	Adolescent	A person 13 to 18 years of age.	Adolescence,Youth,Adolescents,Adolescents, Female,Adolescents, Male,Teenagers,Teens,Adolescent, Female,Adolescent, Male,Female Adolescent,Female Adolescents,Male Adolescent,Male Adolescents,Teen,Teenager,Youths
D000328	Adult	A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available.	Adults