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用波1～V峰间潜伏期判断脑干反应是否正常,受到波Ⅰ的出现率的限制。本文按Selters和Brackmann提出的两耳波V潜伏期差值和校正因子略加修正用于神经耳科。对有传音性聋者,从实际使用刺激级减去1,2及4KHz的听力损失的平均dB值,得出有效刺激级。从校正曲线求得应校正的潜伏期时间。对有感音神经性聋者,4KHz听力损失在55dB以上的,每增加5dB扣除0.1毫秒。校正的耳间波V潜伏期差值大于0.3毫秒,即为阳性。耳蜗性聋者25％有波Ⅳ和波Ⅴ融合为一宽波。这时可用波Ⅲ来判断有无听神经瘤。用对侧乳突参考电极记录可解决半数的波Ⅳ、Ⅴ融合问题。加快刺激的重复率是解决这一问题的最可靠办法。
With the wave 1 ~ V peak latency to determine whether the brain stem reaction is normal, by the occurrence of wave Ⅰ limit. This article by Selters and Brackmann proposed two ears wave V latency difference and correction factor slightly modified for neurotomy. For hearing-impaired hearing-impaired persons, the effective stimulus level is derived from subtracting the mean dB values of hearing loss at 1, 2, and 4 kHz from the actual stimulus level. From the calibration curve should be corrected for the incubation period. For those with sensorineural deafness, 4KHz hearing loss in more than 55dB, deduct 0.1 milliseconds for each additional 5dB. Corrected ear wave V latency difference greater than 0.3 milliseconds, is positive. 25% of cochlear deafness wave Ⅳ and wave Ⅴ fusion into a wide wave. At this time can be used to determine the presence or absence of acoustic neuroma wave Ⅲ. With the contralateral mastoid reference electrode recording can solve half the wave Ⅳ, Ⅴ fusion problem. Speeding up the repetition rate of stimulation is the surest way to solve this problem.