A manual of diseases of the throat and nose : including the pharynx, larynx, trachea, oesophagus, nose and naso-pharynx . he same plane; the tracheal image, on the other hand,is the reflection of a long tract of mucous membrane seen only in per-spective. Hence it is necessary briefly to describe four tracheal images,viz.: the anterior, posterior, the lateral, and the inferior. Anterior Wall.—The appearance of the anterior wall of the trachea 1 It is possible that the mirror recently invented by Nitze and Leiter, of Vienna(Electro-endoskopische Instrumente : Wien., 1880), in which the electric
A manual of diseases of the throat and nose : including the pharynx, larynx, trachea, oesophagus, nose and naso-pharynx . he same plane; the tracheal image, on the other hand,is the reflection of a long tract of mucous membrane seen only in per-spective. Hence it is necessary briefly to describe four tracheal images,viz.: the anterior, posterior, the lateral, and the inferior. Anterior Wall.—The appearance of the anterior wall of the trachea 1 It is possible that the mirror recently invented by Nitze and Leiter, of Vienna(Electro-endoskopische Instrumente : Wien., 1880), in which the electric light (con-tained within the mirror) is actually introduced into the pharynx, may be of use forlighting up the tracheal canal. A constant flow of cold water which passes round themirror, and through the handle to a reservoir, keeps the glass from becoming incon-veniently heated. - In 17 out of 100 cases in which I was able to see the bifurcation, the upper thirdof the posterior wall of the trachea could not be brought into the field of vision. 3 Klinik der Kehlkopfkrankheiten, etc., p. 92. TRACHEOSCOPY 369 at Fig. 99.—View of Anterior Wall of Trachea andBronchi: at, anterior wall of trachea; rvc, right vocalcord ; Ivc, left vocal cord ; r&, right bronchus; lb, leftbronchus; 6s, bronchial spur. in the field of view depends, as already remarked, on the angle at whichthe mirror is held. The image is rendered very characteristic by theprominent cartilaginous rings, and the grayish red recesses between varies, however, according tocircumstances. Thus, in healthypersons, the color of the interspa-ces depends in a great measure onthe degree of illumination; whenthe light is not very powerful, theinterstices are of a dull gray color,but with a strong oxyhydrogenlight they generally appear brightred. When the mirror is held soas to make an angle of 45° withthe plane of the horizon, six toeight of the uppermost rings ofthe trachea can generally be coun-ted; at an angle
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Keywords: ., bookcentury1800, bookdecade1880, bookpublisherne, booksubjectnose
