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. 1890 Excerpt: ...osseous portion of the canal will be impaired in such a way that either no osseous canal at all, or only a most irregular one, becomes ultimately formed. It thus may happen on examination with the probe in later years, that the canal is found occluded by osseous tissue covered by the integument. Such long-standing ...
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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. 1890 Excerpt: ...osseous portion of the canal will be impaired in such a way that either no osseous canal at all, or only a most irregular one, becomes ultimately formed. It thus may happen on examination with the probe in later years, that the canal is found occluded by osseous tissue covered by the integument. Such long-standing cases are comparatively not at all rare, and the author has in them never been able to find that the atresia was limited wholly to the soft parts. Bony material could always be found in the deeper region; indeed, in most instances outgrowths of bone with more or less irregular rounded surfaces confronted the view; while in cases of recent occlusion, the canal presented the appearance of a concave cone with a rounded-off apex. In adults the author has observed that these osseous formations which quite occlude the canal sometimes proceed even from its cartilaginous part. In a case in which the canal measured only 6;;;/;/. the obstructing mass was of bony hardness, and in intimate connection with the cartilage of the canal, appearing to grow out from its wall, with the convex surface towards the opening. The integument lining the canal was continuous with the structure covering the new formation. Stenosis of the canal seldom induces marked symptoms. The lumen may be considerably reduced without notable effect upon the hearing. If deafness be present, it generally depends on some secondary cause, such as accumulation of cerumen or epidermis, or accidental swelling of the soft structures. By such conditions the narrowing may very easily become a complete occlusion, and so induce deafness and other phenomena. Complete atresia always causes very considerable deafness, from the imperfect sound-conduction. Other subjective symptoms are only apt to occur if...
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Add this copy of Text-Book of the Diseases of the Ear to cart. $78.19, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Santa Clarita, CA, UNITED STATES, published 2015 by Arkose Press.
