A manual of diseases of the throat and nose : including the pharynx, larynx, trachea, oesophagus, nose and naso-pharynx . Fio. 26.—Nasal Specula. A, Duplays speculum: a and 6, the two blades : c, male screw : e. handle ofrunning screw. The dotted lines show the position of the instrument when fully open. B, Schustersspeculum : a and ft, the two blades; e, handle of male screw : c, male screw. C, Voltolini*s speculum : aand ft, the two blades ; x, rack : c, small spring for keeping X in position. When y and z are held together,the instrument is kept closed, and by pressing on z it is opened. pu
A manual of diseases of the throat and nose : including the pharynx, larynx, trachea, oesophagus, nose and naso-pharynx . Fio. 26.—Nasal Specula. A, Duplays speculum: a and 6, the two blades : c, male screw : e. handle ofrunning screw. The dotted lines show the position of the instrument when fully open. B, Schustersspeculum : a and ft, the two blades; e, handle of male screw : c, male screw. C, Voltolini*s speculum : aand ft, the two blades ; x, rack : c, small spring for keeping X in position. When y and z are held together,the instrument is kept closed, and by pressing on z it is opened. pulled open is fixed in position by means of a running screw (Fig. 26 A,e and e). Its full size is shown in Fig. 26 A, and no larger instrument isever required, and can seldom be tolerated. It will be seen that theblades open very widely. Schuster, of Aix-la-Chapelle, has modified Duplays speculum by em-. Fig. 27.—Dr. Elsbergs Trivalve Nasal Speculum. A, the instrument closed ready for introduction. B,the instrument expanded. ploying a fixed instead of a running screw (Fig. 26 B). The instrumentis rather too large, and yet does not open so widely as Duplays; but theblades can be opened more gradually, and are thus less likely to hurt thepatient. Voltolini (Fig. 26 C) has also modified Duplays arrangement foropening the speculum, by adapting a rack movement to it, but I have not 168 DISEASES OF THE THROAT AND NOSE. *| found this at all convenient, and the instrument is apt to cause a gooddeal of pain. Massei again has varied Duplays speculum, by fenestrat-ing one of the blades, and under some circumstances this instrument isvery- useful. Elsberg has invented a trivalve speculum (Fig. 27) by means of which the interior of the nose can be thoroughly inspected. The three blades __ are separated by closing the handles, or may be more n gradually separated by means of a screw in the shank
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Keywords: ., bookcentury1800, bookdecade1880, bookpublisherne, booksubjectnose
