Gatland D J, Billings R J, Youngs R P, Johnson N P
Department of Otolaryngology, St Bartholomew's Hospital, London, England.
Acta Otolaryngol. 1988 Mar-Apr;105(3-4):218-22. doi: 10.3109/00016488809097001.
An increase in the ratio of the summating potential to the action potential components of the electrocochleogram is known to be a feature of endolymphatic hydrops. We investigated the value of the SP/AP ratio in response to condensation and rarefaction click stimuli delivered separately. In patients with electrophysiological evidence of endolymphatic hydrops there was found to be a significantly greater SP/AP ratio to condensation clicks than rarefaction clicks. This finding supports the hypothesis that the increased SP/AP ratio in hydrops is due to mechanical asymmetry of the basilar membrane.
已知耳蜗电图中总和电位与动作电位成分的比值增加是内淋巴积水的一个特征。我们研究了分别给予压缩声和稀疏声短声刺激时SP/AP比值的价值。在内淋巴积水的电生理证据患者中，发现压缩声短声刺激时的SP/AP比值显著高于稀疏声短声刺激。这一发现支持了积水时SP/AP比值增加是由于基底膜机械不对称的假说。
