あぶみ骨外科に関する臨床的並びに実験的研究
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概要
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In connection with stapes surgery, several studies have been carried out.The results are as follows: 1.Our three years clinical experiences on stapes surgery have shown that at the operation of stapedovestibulo interposition, the veingraft was a little more effective than any other tissues, which were equal value to each other, and for the prost- hesis, the stapes itself was the best of all, if it were not so much damaged, and the better one was the incus meanwhile the malleus was out of value. The results of surgery were the best on the cases of otosclerosis, while they were not so much on chronic otitis media. Furthermore, stapes surgery showed some effe- cts on some cases of vertigo. 2.As for the X ray photographing of the stapes, the normal and enlarging transillumination was performed by using a method similar to Guil- lens.Adding to it, the tomograph photographing was also tried.Furthermore, the auditory ossicles embedded in resin, or a cadaver temporal bone was irradiated to take photograph.And it was concluded, some image would be able to be expo- sed to some extent, although it would not be eno- ugh to be used for diagnosis. 3.A condenser pick up was applied to the foot plate of the stapes from the inner ear side to measure its vibration, and the following characta- ristics were decided. (1)As for the longitudinal direction, the anterior pole vibrated 1.6 times stronger than the posterior pole for 80db of sounds.The motion was the combination of a piston movement and a hinge movement.The ratio did not change corre- sponding to the frequency of sound, but to the pressure of sound decreasing in a straight line. (2)As for the tranSversal direction, the lower part vibrated stronger than the upper part, and its relation was constant to the frequency and pressure of sounds. (3)There was no rotatory axsis that passed through the foot plate. (4)The amplitude was some microns above 10 the maximum.And the relationship between the at pressure and the frequency showed a curve like aparavola. (5)On aged persons, the amplitude of vib- ration was small and the strain was apt to agpear. And this made some imagination, that senile hardness of hearing of aged persons would confuse some conductive hardness of hearing. 4.Summarising the clinical and experimental results, it was presumed that the hinge movement of the stapes would play an important role in the sound conducting mechanisms.
- 社団法人 日本耳鼻咽喉科学会の論文