CopperandSilverArteriolesinRetina.docx

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Copper and Silver Arterioles in Retina FIGURE 29-18 The retina in hypertension. A , The wall of the retinal arteriole (arrow) is thick. Note the exudate (e) in the retinal outer plexiform layer. B , The fundus in hypertension. The diameter of the arterioles is reduced, and the color of the blood column appears to be less saturated (copper wire–like). If the wall of the vessel were thicker still, the degree of red color would diminish such that the vessels might appear clinically to have a “silver-wire” appearance. In this fundus photograph, note that the vein is compressed where the sclerotic arteriole crosses over it [A/V nicking]. ( B , Courtesy of Dr. Thomas A. Weingeist, Department of Ophthalmology and Visual Science, University of Iowa, Iowa City, IA.) From: Kumar: Robbins and Cotran Pthologic Basis of Disease, Professional Edition, 8 th ed. Accessed from MDConsult First Consult: http://www.mdconsult.com/das/book/body/217869226-3/0/2060/I4-u1.0-B978-1-4377-0792-2. .50034-1--f18.fig?
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Unformatted text preview: fromsearch=true&eid1=4-u1.0-B978-1-4377-0792-2. .50034-1. .gr18&EID=4-u1.0-B978-1-4377-0792-2. .50034-1--cesec36&sid=1050198940&anc=4-u1.0-B978-1-4377-0792-2. .50034-1--f18 Hypertensive retinopathy is graded as follows : Grade 1generalized attenuation of retinal arterioles Grade 2more pronounced attenuation and focal arteriolar attenuation Grade 3generalized and focal arteriolar attenuation with retinal exudates, cotton-wool spots, and hemorrhages Grade 4grade 3 changes plus papilledema Grading of the arteriolar changes is as follows: Grade 1broadening of the arteriolar reflex and minimal A-V crossing defects Grade 2increased arteriolar light reflex and A-V crossing changes Grade 3copper wire arterioles and marked A-V crossing changes Grade 4silver wire arterioles and severe A-V crossing changes http://www.mdconsult.com/das/book/body/217869226-3/1050198937/1481/597.html#4-u1.0-B978-1-4160-2467-5. .50055-5--cesec95_3709...
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This note was uploaded on 02/18/2012 for the course PAS 600 - 601 taught by Professor Garrubba during the Fall '10 term at Chatham University.

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