Timpanometría de multifrecuencia en el vértigo de Menière unilateral durante las intercrisis

The analysis of the admitancy of the middle ear in patients with Meniere�s disease shows contradictories results in the differents articles published. The objective of our study es to analyse the resonant frequency in patients with unilateral Meniere�s disease. For this reason, we have studied 20 patients in a intercritical period, which didn�t show any other ear pathology (tympanosclerotic plaques, previous surgery...). We use the contralateral ear as a control, in each of the cases. For calculation the resonant frequency, we use the Virtual model 310 tympanometer, through susceptance tympanogram. The mean resonant frequency in Meniere�s patients was 1130�5 Hz (range: 710- 1600 Hz) and 1109 Hz (range: 800- 1400 Hz) in controls, without stadistical differences. Neither was stadistical differences in tympanometric amplitude (97�9 daPa front to 90�1) nor in static admittance (0�8 front to 0�6). For this reason, we didn�t find, ijn our study, an increase of the stiffness of the ossicular chain, as a consequence of the less mobility of the annular ligament, due to the endolymphatic hypertension on ears with Meniere�s disease in a intercritical period.