. The pathological anatomy of the ear . injectionof its cutis layer, the tympanic mucous memljranethroughout, even to the covering of the ossicles, isfinely injected, and the cavity is in part, seldomwholly, filled Avith a clear, yellowish serous fluidwhich may become yellowish red from the intermix-ture of blood (sero-hemorrhagic). A slight swellingof the mucous membrane is sometimes caused by awatery infiltration, oedema, of the subepithelial con-nective tissue. The Eustachian tube may retain itsnormal permeability. If the membrana tympani has not been rendereduntranslucent from old opacitie
. The pathological anatomy of the ear . injectionof its cutis layer, the tympanic mucous memljranethroughout, even to the covering of the ossicles, isfinely injected, and the cavity is in part, seldomwholly, filled Avith a clear, yellowish serous fluidwhich may become yellowish red from the intermix-ture of blood (sero-hemorrhagic). A slight swellingof the mucous membrane is sometimes caused by awatery infiltration, oedema, of the subepithelial con-nective tissue. The Eustachian tube may retain itsnormal permeability. If the membrana tympani has not been rendereduntranslucent from old opacities, it is possible bothduring life and after death to recognize the boundaryline of the serous exudation, and its movement on achange of position of the tympanum. Sometimes,also, bubbles are distinctly visible. In the chronic form of serous catarrh all hypene- 1 Scliwartze, Paracentese des Trommel fells, Halle, 1808. Politzer,A. f. 0., iii., 328. Zaufal, .1. /. 0., v., S. 38. Wendt, Archiv. furHeilkunde von E. Wagner, xiii., S. THE TYMPANUM. 97 mia is wanting, but hypertrophic processes are com-mon in the mucous membrane, in which the ossiclesmay be embedded or a new growth of membranes orbands (synechiaB) be produced. The serous catarrh is found especially common inold age in persons otherwise• healthy; it is also found withsyphilis, heart diseases, pneumo-nia, pleuritic exudations, Brightsdisease, naso-pharyngeal catarrh,and apparently may be sometimesdependent on disturbances of vaso- ^. ^^ motor innervation. Serous Exudation in the The mucous catarrh ^ (otitis Tympanum, the nearly hor- izontal boundary line of the media catarrhahs). The acute liquid appearing through theform shows a universal hypergemia •^ varia])le degree, sometimes with hemorrhages inthe subepithelial connective tissue, and swelling ofthe mucous membrane. This swelling may affect thewhole membrane equally, or it may be more stronglymarked at certain spots, the tegmen and promontor
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Keywords: ., bookcentury1800, bookdecade1870, bookidpa, booksubjecteardiseases
