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ELASTIC PROPERTIES OF INTRAOCULAR BLOOD VESSELS
Author(s) -
BEST MILTON,
BLUMENTHAL MICHAEL
Publication year - 1972
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.1972.tb05972.x
Subject(s) - intraocular pressure , critical closing pressure , ophthalmology , medicine , elasticity (physics) , vascular resistance , radius , materials science , perfusion , blood flow , blood pressure , cardiology , composite material , computer security , computer science
The pressure‐flow relationship of the intraocular vascular bed was determined by direct perfusion of the ophthalmic artery in enucleated cat eyes. From the data obtained, pressure‐resistance, pressure‐radius, and tensionradius diagrams were constructed for the resistance vessels of the intraocular vascular bed. The results indicated that these vessels do not obey Hooke's law in that Young's modulus of elasticity increases as the radius of the vessel is increased. The shape of the elastic diagram is not affected by alterations in intraocular pressure or vasomotor tone. The addition of levarterenol bitartrate to the perfusate increases critical closing pressure and resistance but decreases circumferential tension in the vessel wall by causing a marked reduction in the radius of the vessel.