This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1906 Excerpt: ...proof that obstruction may be caused by hemorrhage within the nerve sheath, or by spasm apart from endarteritis. The possibility of thrombosis in connection with spasm, which some clinical histories suggest, as Hay's case referred to below, Coats does not discuss. A case regarded as one of embolism of the central ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1906 Excerpt: ...proof that obstruction may be caused by hemorrhage within the nerve sheath, or by spasm apart from endarteritis. The possibility of thrombosis in connection with spasm, which some clinical histories suggest, as Hay's case referred to below, Coats does not discuss. A case regarded as one of embolism of the central artery probably associated with disease of the vessel walls, is reported by Velhagen. Its chief interest is due to the escape from damage of a portion of the retina supplied from a vessel emerging at the margin of the optic disk; and the distribution of the resulting atrophic area in the optic nerve. In a case reported by P. J. Hay the cilio-retinal blood supply permitted the retention of normal central vision. Of obstruction of the main trunk of the central vein, Harms discusses as causative conditions: (1) thrombosis from enfeeblement of the circulation; (2) thrombosis where the calibre of the vein is normal, but the venous current impaired by narrowing at some other point.; (3) chronic in152 OBSTRUCTION OF RETINAL VESSELS flammation of the middle and inner coats of the vein, and (4) thrombosis consecutive to endophlebitis. A very complete study of a case, and of the literature of the subject, has been made by Baquis. In a very elaborate paper Harms reports an extended anatomical study of the diseases of both the central artery and vein, with their effects on the retinal circulation, and especial consideration of so-called hemorrhagic infarcts. He concludes that the two clinical pictures of the so-called "embolism of the central artery" and "thrombosis of the central vein" cannot be sharply separated from one another. It generally happens that the original disease in the one trunk, brings about disease of the other as a compli...
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