[Acoustic absorbance characteristics of wideband tympanometry in patients with Meniere's disease].

Objective:To study acoustic absorbance characteristics of wideband tympanometry in patients with unilateral Meniere's disease. Method:Acoustic absorbance were detected using wideband tympanometry in 36 patients with unilateral Meniere's disease and 39 control subjects excluding inner ear and middle ear disease. All patients with Meniere's disease underwent electrocochleography, gadolinium contrast internal auditory canal MRI, pure tone test. The integral area formed by the absorbance curve on peak pressure and x-axis(frequency) was calculated. Student's t-test was used to compare integral areas difference of 2 ears in Meniere's disease patients and control group. Result:The integral area of absorbance was greater in affected side than unaffected side and there was no difference in peak values of absorbance between 2 ears in Meniere's disease patients. There was no significant difference in areas between Meniere's disease in different grade(P>0.05). Peak value of absorbance and difference value of absorbance were not significant between Meniere's disease patients and normal control. Only 61.11% Meniere's disease patients showed -SP/AP＞0.4 and 95.24% showed endolymphatic hydrops in affected side. Conclusion:Affected side in patients with Meniere's disease showed higher integral area of absorbance than other side,which is high sensitive but not specific.