A text-book of the diseases of the ear and adjacent organs . - distance :acoumeter 25 cm., speech 65 cm. During examination with the ear-speculum we must concentrateour attention upon the locality and the size of the perforation, uponthe condition of the remains of the membrana tympani and of theinner wall of the tympanic cavity, and lastly upon the coincident changes in the external meatus. APPEARANCE OF THE MEMBRANA TYMPANI. 361 The site of the loss of substance is most frequently the anteriorinferior portion of the membrana tympani, and next to that itsposterior superior quadrant; Shrapnell
A text-book of the diseases of the ear and adjacent organs . - distance :acoumeter 25 cm., speech 65 cm. During examination with the ear-speculum we must concentrateour attention upon the locality and the size of the perforation, uponthe condition of the remains of the membrana tympani and of theinner wall of the tympanic cavity, and lastly upon the coincident changes in the external meatus. APPEARANCE OF THE MEMBRANA TYMPANI. 361 The site of the loss of substance is most frequently the anteriorinferior portion of the membrana tympani, and next to that itsposterior superior quadrant; Shrapnells membrane, situated abovethe short process, is more rarely destroyed. The size of the perforation varies from that of the prick of a needleto the complete destruction of the membrane. But the extent of theloss of substance depends neither on the duration nor on the in-tensity of the purulent process. The greatest loss of substanceoccurs with scarlatino-diphtheritic middle-ear suppuration and intubercular phthisis of the mucous membrane of the middle
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Keywords: ., bookcentury1800, bookdecade1890, booksubjecteardiseases, bookyear
