法医学杂志

法医学杂志 ›› 2008, Vol. 0 ›› Issue (4): 248-251.

• 论文 • 上一篇    下一篇

听力正常人听性稳态反应阈值与纯音测听阈值的比较

杨小萍;范利华;周晓蓉;朱广友;   

  1. 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;
  • 发布日期:2008-08-25 出版日期:2008-08-28

Comparison of Thresholds Acquired with ASSR and PTA in Normal-hearing Subjects

YANG XIAO-PING,FAN LI-HUA,ZHOU XIAO-RONG,ZHU GUANG-YOU(SHANGHAI KEY LABORATORY OF FORENSIC MEDICINE,INSTITUTE OF FORENSIC SCIENCE,MINISTRY OF JUSTICE,P.R.CHINA,SHANGHAI 200063,CHINA)   

  • Online:2008-08-25 Published:2008-08-28

被引次数

14

摘要： 目的通过比较听性稳态反应(auditory steady-state responses,ASSR)阈值与纯音测听(pure tone audiometry,PTA)阈值,为ASSR技术应用于听力障碍法医学鉴定提供技术数据。建立本实验室ASSR阈值与PTA阈值的校正值。方法对27例(54耳)正常听力志愿者进行PTA及500、1000、2000和4000Hz的ASSR测试,采用配对t检验法比较测试耳ASSR阈值与PTA阈值的关系;并验证SmartEP-ASSR测试系统校正后的ASSR阈值与PTA阈值的一致性。结果正常耳ASSR阈值较PTA阈值高(P<0.05),各频率差值:500Hz为(22.04±5.79)dB,1000Hz为(11.02±5.44)dB,2000Hz为(12.59±5.89)dB,4000Hz为(17.78±7.25)dB;仪器校正后的ASSR阈值与PTA阈值的差值:500Hz为(-3.96±5.79)dB,1000Hz为(0.02±5.44)dB,2000Hz为(-0.41±5.89)dB,4000Hz为(-1.25±7.25)dB。结论听力正常人ASSR阈值较PTA阈值高,其差值在各频率不一致,平均为16.9dB。ASSR用于听力障碍法医学鉴定中评估行为听阈时,ASSR阈值需要进行校正。

关键词: 法医学, 测听法, 纯音, 听阈, 听性稳态反应

Abstract: Objective To provide new objective technology in evaluating hearing loss for forensic expert by comparing the thresholds acquired with auditory steady-state responses(ASSR) and pure tone audiometry(PTA)in our laboratory.Methods Twenty-seven subjects with normal hearing(54 ears,18-28years)were tested with PTA and ASSR at 500,1 000,2 000 and 4 000 Hz.Paired t-test analysis was performed on threshold of ASSR and PTA at difference frequency(500,1 000,2 000 and 4 000 Hz).Results At each frequency(500,1 000,2 000 and 4 000 Hz),the thresholds acquired with ASSR were higher than those acquired with PTA(P<0.05).The mean difference of each frequency were(22.04±5.79) dB(500 Hz),(11.02±5.44) dB(1 000Hz),(12.59±5.89) dB(2 000 Hz) and(17.78±7.25) dB(4 000 Hz).The mean difference between the system automatically adjusted threshold of ASSR and PTA were(-3.96±5.79) dB at 500 Hz,(0.02±5.44) dB at 1 000 Hz,(-0.41±5.89) dB at 2 000 Hz,and(-1.25±7.25) dB at 4 000 Hz.Conclusion At each frequency(500,1 000,2 000 and 4 000 Hz),the thresholds acquired with ASSR were higher than those acquired with PTA.The mean difference is 16.9 dB.As an objective and mature method,ASSR could be used in evaluation of hearing-loss degree for forensic expert.But adjusted threshold value should be established when ASSR is used to estimate hearing threshold in each laboratory.

Key words: forensic medicine, audiometry, pure-tone, auditory threshold, auditory steady state responses