摘要

Conclusion: Stimulus biasing modulated the amplitude of the tone burst evoked summating potential (SP) in cars affected by Meniere's disease less than in normal ears. A reduced SP bias ratio added diagnostic accuracy for the diagnosis of Meniere's disease. Objectives: To evaluate the effect of stimulus biasing on the human tone burst SP, and to determine if stimulus biasing could contribute to the electrocochleography as a means of confirming the diagnosis of Meniere's disease. Patients and methods: Patients referred for transtympanic electrocochleography (TT ECochG) were assessed prospectively on clinical grounds according to the AAO-HNS criteria and a scale devised by one of the authors. A Meniere's group of ears and a non-Meniere's group of ears was determined. The cars opposite a Meniere's ear were not included in the analysis. The ratio of the click SP amplitude and the action potential (AP) amplitude (SP/AP ratio), the tone burst SP amplitude at 500 Hz, 1 kHz, 2kHz and 8 kHz, and the effect of stimulus biasing on the tone burst SP were measured. Results: A unipolar stimulus biasing ratio established for the modulation of the I kHz tone burst SP separated the Meniere's ears from the non-Meniere's ears with a sensitivity of 85% at a specificity of 80.6%, and the difference between groups reached statistical significance (p = 0.016). The 1 kHz SP amplitude measurements and the stimulus biasing measurements were superior to the click SP/AP ratio for identifying the Meniere's group. A combination of 1 kHz SP amplitude measurements and SP bias ratio separated the Meniere's cars from the non-Meniere's cars with an accuracy of 85%.

  • 出版日期2010-1