Stapells D R, Ruben R J
Department of Otolaryngology, Albert Einstein College of Medicine, Bronx, New York 10461.
Ann Otol Rhinol Laryngol. 1989 Dec;98(12 Pt 1):941-9. doi: 10.1177/000348948909801205.
The auditory brain stem responses (ABRs) to 500- and 2,000-Hz bone-conducted (BC) tones were recorded from 48 infants with ears exhibiting various external and middle ear states (normal, otitis media, auditory meatal atresia). Amplitudes were greater, wave V latencies longer, and detectability better for responses to 500-Hz BC tones compared to 2,000-Hz BC tones. Overall, most (94% to 100%) infants with normal cochlear sensitivity demonstrate ABRs to 20-dB normal hearing level (nHL) 500-Hz BC tones and 30-dB nHL 2,000-Hz BC tones. In cases in which masking is difficult (eg, bilateral atresia), infant ipsilateral/contralateral ABR asymmetries may help determine from which cochlea a response to the BC tones originates. In conclusion, two-channel ABR recordings to BC tones appear to be feasible for demonstrating normal cochlear sensitivity in infants.
对48名耳朵呈现各种外耳和中耳状态（正常、中耳炎、耳道闭锁）的婴儿记录了对500赫兹和2000赫兹骨导（BC）音的听性脑干反应（ABR）。与2000赫兹BC音相比，对500赫兹BC音的反应振幅更大，V波潜伏期更长，可检测性更好。总体而言，大多数（94%至100%）耳蜗敏感性正常的婴儿对20分贝正常听力级（nHL）的500赫兹BC音和30分贝nHL的2000赫兹BC音表现出ABR。在掩蔽困难的情况下（如双侧闭锁），婴儿同侧/对侧ABR不对称可能有助于确定对BC音的反应源自哪个耳蜗。总之，对BC音进行双通道ABR记录似乎对于证明婴儿的正常耳蜗敏感性是可行的。
