听力正常人颅顶慢反应阈值与行为听阈的比较  

Comparison of Thresholds Acquired with SVR and PTA in Normal Hearing Subjects

作　　者：刘会[1,2] 朱广友[2] 杨小萍[2] 周晓蓉[2] 万雷[1,2] 范利华[2] 

机构地区：[1]苏州大学医学部法医学系,江苏苏州215123 [2]司法部司法鉴定科学技术研究所上海市法医学重点实验室,上海200063

出　　处：《法医学杂志》2010年第1期18-21,共4页Journal of Forensic Medicine

摘　　要：目的通过比较听力正常人的颅顶慢反应(slow vertex response,SVR)阈值与纯音测听(pure toneaudiometry,PTA)阈值的关系,探讨SVR检测技术在听觉功能障碍法医学鉴定中的应用价值。方法对听力正常的46名志愿者,分别对双耳进行0.125～8kHz频率范围内的PTA阈值及0.5～4kHz频率范围内的SVR反应阈测试,通过配对t检验比较0.5、1、2、4 kHz频率范围的SVR反应阈与PTA阈值的差异,并运用方差分析比较不同频率间的SVR反应阈与PTA阈值差值的差异。结果各频率的SVR反应阈与PTA阈值差异有统计学意义(P<0.05)。SVR反应阈与PTA阈值的差值在1kHz频率时最小,为(3.86±6.12)dBHL,而在0.5、2、4kHz频率时的差值分别为(5.98±6.72)、(7.12±6.56)、(8.53±7.90)dBHL。不同频率之间的SVR反应阈与PTA阈值差值的差异有统计学意义。结论听力正常人的SVR反应阈在各频率均稍高于行为听阈,在运用SVR反应阈推断行为听阈时需进行校正。Objective To investigate the value of slow vertex response（SVR） for forensic appraisement of hearing dysfunction by comparing the thresholds acquired with SVR and pure tone audiometry （PTA）. Methods Forty-six subjects with normal hearing were tested with PTA（0.125-8 kHz） and SVR（0.5-4kHz）. Paired t-test analysis was performed on the thresholds of SVR and PTA at each frequency（0.5, 1, 2 and 4 kHz）, and analysis of variance was performed on the difference between the pure tone audiometry threshold and the evoked potential threshold among different frequency. Results At each frequency （0.5, 1, 2 kHz and 4kHz）, difference between the thresholds acquired with SVR and PTA was statistically significant（P〈0.05）. The mean difference of the two thresholds were （5.98±6.72） dB HL at 0.5 kHz, （3.86±6.12） dB HL at 1 kHz, （7.12±6.56） dB HL at 2kHz, （8.53±7.90）dB HL at 4kHz, and the mean difference at 1 kHz was the smallest. This variation between frequencies was also statistically significant. Conclusion The thresholds acquired with SVR were higher than those acquired with PTA. The adjusted thresholds should be established at each frequency, when the SVR thresholds are used to evaluate the behavioural hearing thresholds.

关 键 词：法医学 听阈 测听法 纯音 诱发电位 听觉 

分 类 号：R764.04[医药卫生—耳鼻咽喉科] R224.2[医药卫生—临床医学]