A text-book of the diseases of the ear and adjacent organs . ld upon condensing the airin the middle ear. As to the number of perforations, as a rule there is only one aper-ture in the membrane; but occasionally two perforations will befound (Figs. 170 and 171) of different forms and sizes. Still rarer arethe cases in which the membrane is perforated in three (Fig. 167), 362 CHRONIC PURULENT INFLAMMATION OF THE MIDDLE EAR. four (Bing) or more places (v. Troltsch, Wreden), or in which themembrana tympani is perforated like a sieve by numerous smallorifices, as has been observed (Bonnafont, Schw
A text-book of the diseases of the ear and adjacent organs . ld upon condensing the airin the middle ear. As to the number of perforations, as a rule there is only one aper-ture in the membrane; but occasionally two perforations will befound (Figs. 170 and 171) of different forms and sizes. Still rarer arethe cases in which the membrane is perforated in three (Fig. 167), 362 CHRONIC PURULENT INFLAMMATION OF THE MIDDLE EAR. four (Bing) or more places (v. Troltsch, Wreden), or in which themembrana tympani is perforated like a sieve by numerous smallorifices, as has been observed (Bonnafont, Schwartze) in diphtheriticand tubercular suppurations of the middle ear. During the course of the middle-ear suppuration the remainder ofthe membrana tympani appears through the epidermis lying upon it,whitish, greenish-yellow, or reddish-gray, and is differentiated, evenwhen congested, in most cases from the mucous membrane of thewalls of the tympanic cavity which is dark red, or covered by epi-dermis and exudate. Earelv the cuticular laver is excoriated. The.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjecteardiseases, bookyear
