A text-book of diseases of the nose and throat / by Francke Huntington Bosworth.

  • F. H. Bosworth
Date:
1897
Catalogue details

Licence: Public Domain Mark

Credit: A text-book of diseases of the nose and throat / by Francke Huntington Bosworth. Source: Wellcome Collection.

    32/860 page 6
    to a fixed apparatus. The liead-mirrors in use are rather heavj^ and large. As a matter of fact the lighter the mirror the better, and for this reason I much prefer a smaller-sized mirror which possesses all the advantages and none of the disadvantages of the larger ones. Fig. 2 shows the writer's head-mirror; it is two and a half inches in diameter, with the knob attached to the periphery of the frame which gives unrestricted movement to the mirror. In addition to this, the split socket is only of sufficient size to receive the knob, while the plate to which the socket is attached is but one and a half inches long. The band is made of half-inch alpaca braid, which is far superior to elastic, is worn with much more comfort, and possesses sufficient elasticity to maintain the instrument firmly in place. In addition to this, the whole affair is perfectly flat and is carried easily in the vest pocket. The Fixed Appaeatus. In the early days of laryngoscopy the idea seems to have prevailed that this art could only be practised by means of a somewhat elaborate apparatus. This idea, I think, had its impetus largely in the intro- duction of Tobold's instrument, which seems to be the pattern on which most of the later laryngoscopes were constructed. Tobold's apparatus, though much used, has no practical advantage over a simple head-mirror, which, with a good, sti'ong source of light, affords us as good a method of practising laryngoscopy as the most elaborate apparatus. . Mackenzie's light condenser shown in Fig. 3 is a simple and useful apparatus, and consists of an upright metal cylinder about three inches in diameter, with a fenestra in the side, into which a plano-convex lens two and a half inches in diameter and composing about one-third of a sphere is fitted. The whole may be easily fitted over a coal-oil lamp or gas jet. _ I regard the use, however, of an elaborate laryngoscopic apparatus unnecessary, as examinations can be thoroughy made by means of a head-mirror and a good light. The Examination. The best source of illumination is sunlight. These rays are uti- lized in the small device shown in Fig. 7 which consists of a plane mirror, about four inches in diameter, mounted on - ^U-^^ support, to which it is attached by a universal joint. This may be
    digitised image 1
    digitised image 2
    digitised image 3