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Download Ophthalmic Echography 13: Proceedings of the 13th SIDUO by Karl C. Ossoinig (auth.), Peter Till (eds.) PDF

By Karl C. Ossoinig (auth.), Peter Till (eds.)

This quantity of the Documenta Ophthalmoligica continuing sequence offers the clinical papers learn through the thirteenth Congress of SIDUO, the foreign Society for Ultrasonic analysis in Ophthalmology, held in Vienna in the summertime of 1990. It was once the second one time that SIDUO had chosen Vienna as a domain for its biennial congresses within the 28 years of its lifestyles. formerly, the third SIDUO assembly had taken position as a part of the first international Congress for Ultrasonic prognosis in medication prepared by means of Karl C. Ossoinig in 1969. Ossoinig, the pioneer of Standardized Echography opened the clinical periods of SIDUO thirteen with the 1st Jules Fran~ois Memorial Lecture at the Optic Nerve reviewing the fashionable exam suggestions for specific measurements of the orbital optic nerve and its quite a few sheaths and for a correct analysis and differential analysis of illnesses affecting the optic nerve, highlighting the recent box of prophylactic popularity of early optic nerve compression (e. g. , in Graves' orbitopathy) and the $64000 affirmation of CON within the presence of alternative stipulations affecting the optic nerve services. the 1st clinical consultation then handled numerous fascinating stipulations of the optic nerve and of the extraocular muscle mass starting from inflammatory illnesses equivalent to optic neuritis and orbital myositis to congenital anomalies, from glaucomatous adjustments to IIH, and from general anatomical (dynamic) findings to malignant tumors similar to lymphomas and leucemic meningeosis.

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Example text

The meninges, however, become 32 concentric in extreme gaze directions when the optic nerve is maximally stretched. Then, however, all the subarachnoidal fluid is eliminated from the orbit and the nerve has become dry (central drawing in Figure 15). The drawings in Figure 15 also illustrate how the dural optic nerve sheaths continue as sclera anteriorly and as bony lining (periosteum) within the optic canal posteriorly. The subarachnoidal fluid-filled space around the optic nerve communicates through the optic canal (being reduced there to a narrow "spongy" tissue resembling the meshwork in the anterior chamber angle) with the intracranial subarachnoidal space where the subarachnoidal orbital fluid originates.

Tamayo, and C. Tamburrelli, the maximal arachnoidal diameter was measured in 15 consecutive cases of BIH within a 24-hour period prior to lumbar punctures performed to determine the intracranial pressure. 24 mm). The opening pressure during lumbar puncture was greater than 200 mm of water in all of them (the range was from 238 to 570 mm, the mean was 384 mm). In 15 patients with a variety of conditions other than BIH, the maximal arachnoidal diameter was measured prior to a scheduled lumbar puncture, to match the BIH group.

28 Dural, arachnoidal, and pial surfaces Figure 14B elucidates the three echo graphically most important large surfaces of the optic nerve: (a) The dura is a tunic of dense collagenous tissue which surrounds the optic nerve more like a loose bag than a tight tube. Although it is clearly non-elastic, it is wrapped around the nerve so loosely that it allows the nerve to sweep widely throughout the soft orbital tissues with eye movements, or to be stretched extensively, be it physiologically during extreme gaze directions, or pathologically by marked exophthalmus.

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