Jahrsdoerfer R A, Yeakley J W, Hall J W, Robbins K T, Gray L C
Otolaryngol Head Neck Surg. 1985 Jun;93(3):292-8. doi: 10.1177/019459988509300303.
Thirty patients with congenital aural atresia underwent CT scanning and/or auditory brain stem response (ABR) testing in a 20-month period. Eighteen patients had unilateral atresia and 12 had bilateral atresia. Twelve patients subsequently had surgery for repair of their atresia. CT scanning was not electively done until the patient was at least 2 years of age, while ABR testing was often performed in the first few months of life. Nineteen patients had CT scanning and 27 had ABR testing. The CT technique was found to offer specific advantages not previously observed in other methods of radiographic evaluation: (1) the course of the facial nerve was more easily traced and (2) the presence (or absence) of a stapes was more easily noted. The ABR was measured for monaural air-conduction as well as mastoid-placement bone conduction click stimuli; simultaneous multielectrode two- or four-channel recordings were employed. With this measuring technique it was not only possible to enhance wave I detection but, more important, the laterality of ABR wave I could be noted.
在20个月的时间里，30例先天性耳道闭锁患者接受了CT扫描和/或听性脑干反应（ABR）测试。18例患者为单侧闭锁，12例为双侧闭锁。12例患者随后接受了闭锁修复手术。CT扫描直到患者至少2岁时才选择性进行，而ABR测试常在出生后的头几个月进行。19例患者进行了CT扫描，27例进行了ABR测试。研究发现，CT技术具有其他放射学评估方法以前未观察到的特定优势：（1）更容易追踪面神经的走行；（2）更容易注意到镫骨的存在（或不存在）。对单耳气导以及乳突放置骨导短声刺激进行ABR测量；采用同步多电极两通道或四通道记录。使用这种测量技术，不仅可以增强I波检测，更重要的是，可以记录ABR I波的侧别。
