A manual of diseases of the throat and nose : including the pharynx, larynx, trachea, oesophagus, nose and naso-pharynx . when the instrument is prepared for use. The•canula is also provided with an inner tube which can be easily removedand cleaned, and should be a little longer than the canula proper () so as to provide against the accumulation of mucus. To prevent itsbeing forced out by coughing, the inner tube can be bolted to the Canula.—The principal objection to the tube just describedis that, from the nature of its curve, it often irritates or even cuts intothe ant
A manual of diseases of the throat and nose : including the pharynx, larynx, trachea, oesophagus, nose and naso-pharynx . when the instrument is prepared for use. The•canula is also provided with an inner tube which can be easily removedand cleaned, and should be a little longer than the canula proper () so as to provide against the accumulation of mucus. To prevent itsbeing forced out by coughing, the inner tube can be bolted to the Canula.—The principal objection to the tube just describedis that, from the nature of its curve, it often irritates or even cuts intothe anterior wall of the trachea, and in inventing the right-angled tubewith its long horizontal and short vertical portions, Mr. Durham4 hasmade a very important advance in this department of mechanical surgery. 1 Manufactured by Mayer & Meltzer. 2 Sold by Albrecht, surgical instrument maker, at Tubingen. 3 In most of the English instruments there is only a narrow vertical slit, throughwhich it is often very difficult to pass the tapes. 4 The Practitioner, April, 1869. DISEASES OF THE PHARYNX, LARYNX, AND Fig. 103.—The Temporary Right-angled Canula (Dur-hams) : o, the transverse portion of the canula. which canbe pushed a short or longer distance through the shield s,and then fixed by the screw sc. Other improvements have also been introduced into the Ithas already been pointed out that the depth of the trachea from the sur-face varies in different parts of its course (page 364), but its position also- depends on the condition ofthe neck—whether it is thinor fat, normal or swollen. To-meet these varying conditions,,in Durhams instrument, thatpart of the horizontal portionof the canula which passes intothe neck can be shortened orlengthened, and fixed to theshield in the desired position bymeans of a screw (Fig. 103, sc).This screw arrangement for va-rying the length of the tube, is,of course, only required for thetemporary canula, and may bedispensed wi
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Keywords: ., bookcentury1800, bookdecade1880, bookpublisherne, booksubjectnose
