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La-ryn′go-scope.

An instrument for obtaining a view of the larynx. It consists of a small plane mirror a on a long, slender stem, which is introduced to the back of the throat, and a large concave mirror b for reflecting light (solar or artificial). This last reflector may be either fixed to a stand or suspended from the forehead of the operator. An inverted image is seen in the small mirror. The upper figure is Elsberg's laryngoscope. When artificial light is employed, the patient should sit so that it is a little back of him and on his right side, as in Tieman's instrument (the lower figure). In this case, the light is reflected by a concave mirror c to the smaller mirror, which is held by the observer at the posterior part of the mouth, the uvula resting upon its back. By its means, the vocal chords of the interior of the larynx are exhibited, and have been photographed. One constructed by Dr. Turck in 1857 was modified and improved by Dr. Czermack of Pesth, 1856, who exhibited it in action in 1862, in London. Mr. John Avery of London is said to have constructed a similar apparatus in 1846.

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