This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1896 edition. Excerpt: ... chapter iii. physical examination. Preliminary Observations.--Before describing in detail the instruments needed for the proper examination of the ear, let us recall briefly the topography of the region. The external meatus is made up of two tubes, joined at an angle in both the vertical and ...
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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1896 edition. Excerpt: ... chapter iii. physical examination. Preliminary Observations.--Before describing in detail the instruments needed for the proper examination of the ear, let us recall briefly the topography of the region. The external meatus is made up of two tubes, joined at an angle in both the vertical and horizontal planes, re-entrant downward and forward. The fundus of this canal constitutes the drum membrane, and is continuous with its cutaneous lining. The length of the entire passage, measured from its outermost point--that is, from the tragus to the drum membrane--is thirty-six millimetres, or about one inch and a half. This should be remembered as determining the proper length of instruments to be manipulated in the meatus. It should also be borne in mind that of this inch and a half, a little less than one inch of the tube is cartilaginous and a little over half an inch osseous. The general direction of the cartilaginous tube is upward, backward, and inward, while that of the bony conduit is downward, forward, and inward. For the satisfactory inspection of the deeper parts, it is evident that the axes of these canals must be made as nearly as possible coincident; as the outer portion is movable, traction upon the auricle upward and backward tends to bring the axes into the same straight line. Fig. 25 illustrates the position assumed by the parts in the adult when the auricle is drawn upward, backward, and out Fig. 25.--Pen-drawing from adult specimen, showing the result of drawing the auricle upward and backward. The axes of the bony and cartilaginous meatus arc made coincident, permitt1ng an inspection of the drum membrane (actual size). ward. It will be seen that the cartilaginous and bony meatus form practically a straight canal, the angle...
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Add this copy of Diseases Of The Ear to cart. $77.91, new condition, Sold by Booksplease rated 3.0 out of 5 stars, ships from Southport, MERSEYSIDE, UNITED KINGDOM, published 2010 by Kessinger Publishing.
Add this copy of Diseases Of The Ear to cart. $100.40, new condition, Sold by Booksplease rated 3.0 out of 5 stars, ships from Southport, MERSEYSIDE, UNITED KINGDOM, published 2010 by Kessinger Publishing.
Add this copy of Diseases Of The Ear to cart. $77.91, new condition, Sold by Booksplease rated 3.0 out of 5 stars, ships from Southport, MERSEYSIDE, UNITED KINGDOM, published 2007 by Kessinger Publishing.
