新生儿听觉脑干诱发电位正常值及特性的初步研究

Preliminary study on normal values andcharacteristics of A B Rof the normal newborn babies

目的 本实验提供了听觉脑干诱发电位（ Ａ Ｂ Ｒ） 的数据，旨在检测新生儿听力水平，为部分脑干疾患的诊断提供参考依据。方法 选取足月新生儿６６ 例，其中男３６ 例，女３０ 例。使用国产 Ｎ Ｇ Ｔ２ 型诱发电位仪，用声强９０ ｄ Ｂｎ Ｈ Ｌ短声刺激引出 Ａ Ｂ Ｒ。结果 正常新生儿（ ＜ １８ 天） Ａ Ｂ Ｒ 波型是Ⅰ、Ⅲ、Ⅴ波为主的连续波复合体。潜伏期、波间期男女之间无差异。Ⅴ波对Ⅰ波的比例大于１０ 。 Ａ Ｂ Ｒ 阈值在３０ ～６０ ｄ Ｂ。结论 正常新生儿 Ａ Ｂ Ｒ Ⅰ、Ⅲ、Ⅴ潜伏期为２０５ ，４９６ ，７０５ ｍｓ ；波间期为２８８ ，２２２ ，５０１ ｍｓ。

Objective The test provided the physiological basis of A B E P. The goal wasto monitor hearing levelof the newborn babies and provided the reference basis forthe partly brainstem diseases . Methods The normalnewborn babies were 66 cases ,and the male and female were 30 cases and 38 cases respectively . Theinstru mentof N G T 2 type of A B R was used . The sound intensity was 98 d Bn H L(click) to stimulate evoking A B E P. Results The wave types of A B Rofthe newborn babies were continuous co mpound waves characterized by mainⅠ、Ⅲ、Ⅴwaves. The statisticalanalysis ofthe peak latencies (pl) and theinterpeak laencies ( I P L) showed thatthere was not difference between boy and girl,left and right ears . Wave Ⅴ/ wave Ⅰ> 1 0 . The thresholds ofhearing of A B R of the new born babies were from 30 ～60 d B. Conclusion The P Lof Ⅰ、Ⅲ、Ⅴwave is 2 05 ,4 96 , 7 05 ms,and the I P Lof Ⅰ～Ⅲ、Ⅲ～Ⅴ、Ⅰ～Ⅴis 2 88 ,2 22 ,5 01 msin the normal newborn babies( < 14 days) .