Gaihede M, Felding J U, Elbrønd O
Department of Otolaryngology, Aarhus University Hospital, Denmark.
Acta Otolaryngol. 1995 Jul;115(4):522-7. doi: 10.3109/00016489509139360.
A new method for studying middle ear mechanics is reported in which we measured ear canal pressure changes due to tympanic membrane volume displacements. One feature of this pressure-volume relationship (PVR) is the determination of dynamic compliance of the middle ear system (MES). We found a significant correlation between dynamic compliance expressed by the PVR and static acoustic compliance by tympanometry. Another feature of the PVR was determination of the mechanical zero position of the tympanic membrane (TM) defined in terms of minimum hysteresis, which correlated significantly with the neutral position of the TM determined by tympanometry, but indicates a retracted position of the TM relative to tympanometry. Finally the hysteresis effect of the MES measured with the PVR was compared and found to fall within the range of peak difference found in bidirectional tympanometric recordings, which is also influenced by phase delay and semi-dynamic conditions.
本文报道了一种研究中耳力学的新方法，即我们测量了由于鼓膜容积位移引起的耳道压力变化。这种压力-容积关系（PVR）的一个特点是确定中耳系统（MES）的动态顺应性。我们发现，由PVR表示的动态顺应性与鼓室导抗图测量的静态声顺应性之间存在显著相关性。PVR的另一个特点是根据最小滞后确定鼓膜（TM）的机械零位置，该位置与鼓室导抗图确定的TM中性位置显著相关，但表明TM相对于鼓室导抗图处于后缩位置。最后，比较了用PVR测量的MES的滞后效应，发现其落在双向鼓室导抗图记录中发现的峰值差异范围内，该差异也受相位延迟和半动态条件的影响。
