Diseases of the nose and throat; a text-book for students and practitioners . Fig. 92.—The S WiiiTK Dental Mfg. Electric Laryngoscope. Figs. 92, 9-i), and tlie glass surface held directly over the lightfor a few seconds, or until the surflice is so warm as to prevent theexhaled moisture from condensing upon it. Before introducingthe mirror into the mouth, the metal back should be placedagainst the palm of the hand, to determine its temperature; itshould be warm enough to prevent condensation of the exhaled 344 DISEASES OF THE NOSE AND THROAT. moisture upon its surface, but not sufficientl
Diseases of the nose and throat; a text-book for students and practitioners . Fig. 92.—The S WiiiTK Dental Mfg. Electric Laryngoscope. Figs. 92, 9-i), and tlie glass surface held directly over the lightfor a few seconds, or until the surflice is so warm as to prevent theexhaled moisture from condensing upon it. Before introducingthe mirror into the mouth, the metal back should be placedagainst the palm of the hand, to determine its temperature; itshould be warm enough to prevent condensation of the exhaled 344 DISEASES OF THE NOSE AND THROAT. moisture upon its surface, but not sufficiently hot to do violenceto the delicate mucous membrane of the mouth and prefer to dip the mirror into hot water and then wipe itdry. In order to prolong the examination the surface of themirror may be coated with glycerin; condensation is thus pre-vented, but the image loses in distinctness. In order to obviatethis blur. Dr. Henry Wright devised an ingenious plan forkeeping the mirror warm ; to its back is attached a thin Fn;. 93.—Beselers Lime-Light , shade to protect the eye from the rays of light; B, to connect with oxygen-gas ; C, lime-pencil. spiral, insulated wire, which runs along the handle of the mirrorfrom a small battery. A recent, and often efficient, device for illumination is awell-polished glass rod, one end of which is placed against theneck over the laryngeal region; to the other end is attached acandle or small incandescent electric glow-lamp. As the light istransmitted along the rod, the interior of the larynx is illumi-nated, and can then be examined by the aid of the laryngealmirror, warmed and introduced as described. THE LARYNGOSCOPE AND LARYNGOSCOPY. 345 With the mouth open, tlie mirror is to be introduced withthe reflecting surface downward, and in such a way as not totouch the tongue; primarily, because the surface of tlie glass
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherph, booksubjectnose
