McGee T J, Clemis J D
Ann Otol Rhinol Laryngol. 1982 May-Jun;91(3 Pt 1):304-9. doi: 10.1177/000348948209100316.
The purpose of this paper is not to propose that auditory brainstem response (ABR) be utilized for the assessment of conductive losses, but to define the effects of conductive hearing loss on the ABR when such a complication occurs. Conductive losses attenuate cochlear stimulation. Since wave V latency is inversely related to stimulus intensity, the magnitude of the conductive loss should be a predictor of the wave V latency delay. In this study, ABR wave V latencies from patients with known conductive losses due to canal occlusion, middle ear effusion, ossicular fixation and chain interruption were compared with latency values calculated from the magnitude of the loss. In those patients with occlusion of the external auditory canal and middle ear effusion, the shift of the wave V latency-intensity function correlated well with the air-bone gap. This correlation was poor for patients with ossicular chain disorders. In mixed hearing losses, the increased wave V latency due to the conductive component may totally mask an increase in latency caused by a retrocochlear component.
本文的目的不是提议将听觉脑干反应（ABR）用于传导性听力损失的评估，而是在出现这种并发症时，界定传导性听力损失对ABR的影响。传导性听力损失会减弱耳蜗刺激。由于V波潜伏期与刺激强度呈负相关，传导性听力损失的程度应可预测V波潜伏期延迟。在本研究中，将已知因外耳道阻塞、中耳积液、听骨固定和听骨链中断导致传导性听力损失患者的ABR V波潜伏期，与根据听力损失程度计算出的潜伏期值进行比较。在那些外耳道阻塞和中耳积液的患者中，V波潜伏期-强度函数的偏移与气骨导间距密切相关。对于听骨链疾病患者，这种相关性较差。在混合性听力损失中，由传导性成分导致的V波潜伏期增加可能会完全掩盖由蜗后成分引起的潜伏期增加。
