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o Issue N# 5 - 1999 o

AUDIOLOGY

Multifrequency impedance measurement and Menière's disease. Analysis of the results of TEFLAG


Authors : M. Camicas Van Gout, M. Négrevergne, D. Portmann, R. Lahrizia, R. Dauman, V. Darrouzet, J. P. Bébéar (St Martin, Bordeaux)

Ref. : Rev Laryngol Otol Rhinol. 1999;120,5:317-321.

Article published in french



Summary : We present today our preliminary results of the TEFLAG test performed on 58 patients suffering from Meniere's disease. This test completed in 1993 has already led to a 4-stage classification of noise induced hearing losses. On the one hand, it is based on the morphological study of susceptance B curves, and on the other hand, on the study of the resonant frequency (RF) of the annular ligament of the stapes, provided by a multifrequential impedancemeter. The endolymphatic hydrops coming with the Meniere's disease practically always cohabits in the intercritical period with the decrease of the perilymphatic pressure of the scala vestibuli, wich is shown in the morphology of Stage IV curves especially, and the decrease of the annular ligament rigidity. Inversely, during the vertigo or around, we mainly have stage I curves, and an increase of the stapes annular ligament resonant frequency (RF), testifying the labyrinthic hydrops, which is the physiopathological essence of the Meniere's disease.


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