用耳间V波潜期差和Ⅰ～Ⅴ间期差鉴别感音神经性聋

本文报道20例听力正常人和100例单侧感音神经性聋患者脑干听觉诱发电位的耳间v波潜期差(ILD)和I-V峰间期差(IPLD)。对比分析了在不同声级下,矫正与不矫正v波潜期和用不同方法矫正的结果。发现无论在等感觉级还是在最大峰等效声压级下做ILD和IPLD其结果无统计差异。做ILD时需要对患耳v波潜期矫正,做IPLD时则否。用SClter法和Arslan法矫正的差别只有百分之几毫秒。Selter法简单易行,临床实用。还发现2～4KHZ平均听阈在50dB HL以內者无须矫正v波潜期,大于90dB者则矫正不了。对ILD和IPLD等于零或负值的问题做了讨论,提出需要进一步寻找更灵敏的鉴别指征。当前应将脑干听觉诱发电位与耳蜗电图,眼震电图,蹬骨肌反射等相结合。

ON THE USE OF INTERAURAL LATENCY DIFFERENCE (ILD) AND INTERAURAL INTERPEAK LATENCY DFFERENCE (IPLD) TO DIFFERENTIATE SENSORINEURAL HEARING LOSS

ILD and IPLD of Brainstem evoked potential (BSEP) of 20 hearing-normal subjects and 100 patients with unilateral sensorineural hearing loss (SNHL) were reported in this article. The results obtained in different Sound Level, with or without rectification of latency of V-wave, and with rectification by different methods were compared and analysed. The results of ILD and IPLD either in same Sensoral Level (SL) or in the maximum peak Equivalent Sound Level (PeSPL) had no statistical difference, It was needed to rectify V-wave latency when ILD be done, but no need when IPLD be made. The difference of some ms% was found only in the V-wave lateney rectified by Selter's and Arslan's methods, selter's method is simpler and easier to do in the clinieal practice. It was also observed when average hearing threshold of 2-4 kHz was below 50 dB IlL, the lateney of V-wave was not necded to rcetify when more than 90 dB HL. it was not possible to be rectified The problem concerning ILD and IPLD equalling to zero or negative value was discussed. It was suggested that the detection of more sensitive index was necessary. BSEP must be combincd with Electrocochlcography, Electronystagmogaphy, Stapediuum Muscle Reflex etc at the present time.