A text-book of the diseases of the ear for students and practitioners . non,or a gun fired near the ear; by explosions (Orne Green, Bon- 16—2 244 DISEASES OF THE EAR nafont); by intense concussions in consequence of a strokeof lightning (Ludewig), and in caisson-workers.* Should theair be suddenly condensed in the external meatus, a rupture ofthe membrane is decidedly favoured if the Eustachian tube isobstructed, because the air condensed in the middle ear cannotescape into the pharynx; ruptures are, furthermore, favouredby atrophy, cicatricial formation, and by the presence of chalkdeposits i
A text-book of the diseases of the ear for students and practitioners . non,or a gun fired near the ear; by explosions (Orne Green, Bon- 16—2 244 DISEASES OF THE EAR nafont); by intense concussions in consequence of a strokeof lightning (Ludewig), and in caisson-workers.* Should theair be suddenly condensed in the external meatus, a rupture ofthe membrane is decidedly favoured if the Eustachian tube isobstructed, because the air condensed in the middle ear cannotescape into the pharynx; ruptures are, furthermore, favouredby atrophy, cicatricial formation, and by the presence of chalkdeposits in the membrane. Kuptures brought about by therarefaction of air in the external meatus (kiss upon the ear,aeronauts, therapeutic rarefaction) are, on the whole, tears—that is, those involving only the dermicor mucous membrane layer—have been observed only in a fewcases. As ruptures of the membrane caused by blows in theregion of the ear claim the interest of the practitioner from aforensic standpoint, we will first describe these in
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