高刺激率ABR对椎基底动脉缺血性眩晕的诊断意义

The clinic value of the increasing stimulus rate auditory brainstem response on the diagnosis of vertebrobasilar transient ischemic vertigo

对６７例椎基底动脉缺血性眩晕（ＶＢＴＩＶ）患者同时进行高刺激率（５１次／ｓ）ＡＢＲ和常 规（１１次／ｓ）ＡＢＲ测试，观察两种测试方法的异常率。结果显示：高刺激率 ＡＢＲ（５１～１１次／ｓ）各波 潜伏期及波间期差异常率明显高于常规ＡＢＲ（１１次／ｓ）测试，尤其以Ｖ波、Ⅰ～Ⅴ间期、Ⅲ～Ⅴ间期 的异常率差异更为显著，分别为６５．６７％，５０．７５％，３５．８２％对２６．８７％，１７．９１％，８．９６％，两种测试 方法的异常率比较有极显著性差异（Ｐ＜０．０１）。结果表明：高刺激率ＡＢＲ测试是诊断ＶＢＴＩＶ的可 靠方法，其敏感性优于常规ＡＢＲ测试法，具有肯定的诊断意义。

This study makes use of the increasing stimulus rate auditory brainstem response (ISRABR) diagnostic method for vertebrobasilar transient ischemic vertigo (VBTIV). 67 patients with VBTIV were examined with the ISRABR (51/sec) and the conventional ABR (11/sec). The results showed that the abnormal rate of the V wave peak latency (PL), Ⅰ ~ Ⅴ wave interpeak latency (IPL) and Ⅲ ~ Ⅴ IPL in ISRABR are significantly higher than those of the conventional ABR (65.67%, 50. 75%, 35. 82%, versus 26. 87%, 17.91%, 8. 96%, respectively,X2 test,P<0. 01 ). The results of the study indicated that the ISRABR is a reliable test for the diagnosis of VBTIV. Its sensitivity is superior to the conventional ABR.