Objectives: Physiological studies with experimental
models of endolymphatic hydrops in Meniere's disease
demonstrate some pressure changes at the level
of round and oval window. Interestingly, conductive
type hearing loss was observed in some patients during
Meniere episodes. A close auditory follow-up of
these patients may provide a better understanding of
hydrodynamic changes of the hydrops and micromechanics
of the inner ear.
Patients and Methods: Eighty-four patients (mean
age 34.3 years; range 17 to 77 years) with Menieres
disease were enrolled in the study. Duration of
Meniere symptoms ranged between six months to
22 years (mean 6.2 years). Longitudinal follow-up of
patients was planned for three years. Bone and air
conduction thresholds were averaged and the differences
between the thresholds were calculated.
Results: Twenty-four patients (28.4%) demonstrated
air-bone gap at least at one frequency, the differences
being 18.3, 11.8, 2.8, and 11.1 dB at 0.5, 1, 2,
and 4 kHz, respectively. The average air-bone gap
was 11.5 dB. The difference was the greatest at 0.5
kHz and the least at 2 kHz.
Conclusion: Low-frequency conductive hearing loss
may be detected in Menieres disease, which is apparently
not indicative of middle ear pathology. High incidence
of conductive involvement in patients who have
had a recent episode of vertigo may indicate a distortion
of vibratory movement of the stapes.
FREE FULL TEXTAnahtar Kelimeler: Odyometri; endolenfatik hidrops; işitmekaybı, iletim tipi; Meniere hastalığı/fizyopatoloji.