The Indications for Operative Procedures in Connection with the Lateral Sinus and Internal Jugular Vein. With Illustrative cases
The Journal of Laryngology Rhinology and Otology
July, 1904.] Rhinology, and Otology. 355 of showing, I recently submitted the patient to a careful examination with the following 1 results :-He is a man aged fifty-seven, an intelligent artisan. Weber's test was positive on the right side. On the left side, which was the side operated on, there was no bone conduction whatever with any tuning fork, but when the acoumeter was placed in contact with that side of the head, he said that, although he heard it, he was unable to say that it was with
... that it was with the right ear. From this I think we may assume that bone conduction by means of the acoumeter, in grave nerve deafness, is useless for diagnostic purposes. On the right-hand side he had a loss of twelve seconds in his air conduction with C 4 tuning fork. I now proceed to attempt to determine to what extent the tuningforks would be heard with the sound ear, when that was tightly dosed, and the tuning fork held on the opposite side of the head. The result of these observations was that no tuning fork held thus could be heard below C : \ that if C s was struck sufficiently hard it would be heard by the sound ear to within thirty >eeonds of its ceasing to vibrate, and C 4 forty-five seconds. Deducting from this forty-five seconds the twelve seconds which were lost in air conduction on the sound side, we have then left the fact that if a tuning fork of high pitch is struck with too trreat violence, the sound may be perceived by the sound ear, and attributed to the diseased one, if the duration of its vibration is over thirty seconds, and this might apply also to lower-pitched tuning forks, if they were struck so as to obtain over-tones.