关于导纳鼓室图的不对称性。

On the asymmetry of susceptance tympanograms.

作者信息

Vanpeperstraete P M, Creten W L, Van Camp K J

出版信息

Scand Audiol. 1979;8(3):173-9. doi: 10.3109/01050397909076318.

Abstract

The origin of the tail asymmetry of susceptance tympanograms was investigated. A flow-measuring device enabled an accurate determination of ear-canal volume changes produced during tympanometry. From these measurements one finds that not only is the asymmetry due to the earcanal volume change but that finite drum susceptances exist at high transtympanic pressures. This residual susceptance was found to differ in the two tails of the tympanogram. Although no absolute values of those drum susceptances can be computed, it is possible to indicate which pressure side has the greater residual susceptance.

摘要

研究了导纳鼓室图尾部不对称的起源。一种流量测量装置能够精确测定鼓室导纳测量期间耳道容积的变化。从这些测量结果中可以发现，不仅不对称是由于耳道容积变化引起的，而且在高跨鼓膜压力下存在有限的鼓膜导纳。发现这种残余导纳在鼓室图的两条尾部有所不同。虽然无法计算出这些鼓膜导纳的绝对值，但可以指出哪一侧压力具有更大的残余导纳。