ÖSSZEFOGLALÁS:
A csontvezetéses küszöbveszteséget általában belsőfülkárosodás következményének tartják. Újabban kísérletes vizsgálatok és műtétek után észlelt javulás alapján az a vélemény alakult ki, hogy a csontvezetéses veszteség nem feltétlenül cochlearis vagy retrolabyrinthaer elváltozás következménye, hanem létrehozhatja a középfül mechanizmusának változása is. [1, 2, 3]. Pl. fülkürt elzáródás okozta dobüregi transsudátum esetén észlelt csontvezetéses küszöbveszteség a transsudátum eltávolítása után normalizálódik. Gyakran javul a csontvezetés otosclerosis miatt végzett stapes műtétek után is.
Contribution to the Evaulation of the Bone-Conduction Auditory Tests of Patients with Chronic Otitis
SUMMARY
It is known that the bone-conduction threshold-loss is not implicitly the consequence of cochlear or retrolabyrinthine changes. In connection with the indication of audition-improving operations it is very important to know the real value of the so called cochlear reserve.
On the basis of the statistical investigation of 162 cases with chronic otitis the author found that in 71 patients with unilateral chronic otitis the boneconduction was normal in 40 per cent of the cases, but in 81 bilateral cases the ratio was only 24 per cent.
The bone-conduction-loss depends on the duration of the disease, on the patient’s age, respectively on both factors. It seems that in bilateral cases the lesion is more marked. There were found rising, approximately horizontal and descending curves among the lines representing the pathological threshold values. The very freuqent occurrence of the descending curves makes it probable that in cases of chronic otitis the rise of the threshold is caused by a cochlear lesion in spite of the fact that the change of the mechanism of the middle-ear can give rise to losses of the boneconduction too. This circumstance fully justifies the view that reconstructive surgery should be performed as early as possible.
It is the task of future audiologie research, to find such method of investigation by means of which the loss of the bone-conduction caused bv the change of the middle ear, respectively by the lesion of the inner ear could be differentiated.
A teljes tartalom elolvasásához bejelentkezés szükséges! Bejelentkezés