正常青年人不同体位前庭诱发肌源性电位的研究

Different Test Positions on Vestibular Evoked Myogenic Potentials in Youth

目的探讨正常青年人不同体位前庭诱发肌源性电位(vestibular evoked myogenic potential,VEMPs)的差异,找出适宜的测试体位。方法选取听力正常青年人30例,分别采用仰卧抬头体位、仰卧抬头转头体位和坐位转头体位进行前庭诱发肌源性电位测试,比较三种体位下的VEMP引出率、p12、n23波潜伏期和振幅。结果仰卧抬头体位,仰卧抬头转头体位和坐位转头体位的VEMP引出率分别为100%、100%和63.3%,前两种体位与第三种体位VEMP的引出率、p13和n23波潜伏期及波间期间差异均有统计学意义(P<0.05),前两种体位之间差异无统计学意义(P>0.05)。三种体位之间的振幅比较差异均有统计学意义(P<0.05)。男女间每种体位VEMP的引出率、p13和n23波潜伏期及波间期和振幅比较差异均无统计学意义(P>0.05)。结论仰卧抬头转头体位VEMP的引出率为100%,且振幅最高,为临床最推荐体位;其次可选用仰卧抬头体位VEMP;坐位转头体位VEMP引出率不高,不推荐使用;性别不影响VEMPs测试。

Objective To study different test positions on vestibular evoked myogenic potentials（VEMPs） in youth, and to find a suitable position and provide a guidance for clinical practice. Methods Thirty normal young vol- unteers were tested by vestibular evoked myogenic potentials, using three different positions： supine with the head held straight up（SHU）, supine with the head held up and turned away from the test ear（SHT）, sitting with the head turned away from the test（SIT）, the derivation rate, latency and amplitude were analyzed. Results The deri- vation rate of SHU , SHT and SIT were 100%, 100% and 63.3M, respectively. The derivation rate, p13,n23 latency and p13 n23 inter-latency between SHU and SIT, and between SHT and SIT had statistical differences（P〈 0.05）. No statistical significant differences were found in derivation rate, p13, n23 latency and p13n23 inter-latency between SHU and SHT（P〈0.05）. The amplitude was significantly different among the three positions（P〈0.05）. No statistical significant difference were found in derivation rate,p13,n23 latency , p13 n23 inter-latency and am- plitude between men and women of the three positions（P〈0.05）. Conclusion The derivation rate of SHT was 100% with maximum amplitude. SHT is the most recommended position for clinical test in youth. The derivation rate of SHU was 100%, and no statistical significant difference were found in p13 ,n23 latency and p13n23 inter--latency between SHU and SHT（P〈0.05）. SHU can be used in clinical test. SIT is not recommended for using in clinical test . Gender does not affect VEMPs test.