不同听力水平听性稳态反应阈值与纯音测听阈值比较

目的探讨不同频率下不同听力水平的听性稳态反应（auditory steady-state responses,ASSR）阈值与纯音测听（pure tone audiometry,PTA）阈值的关系。方法对听力正常的志愿者及不同听力水平的感音神经性聋的志愿者共86例（172耳）,分别行PTA及500、1000、2000和4000Hz的ASSR,得出PTA阈值及ASSR阈值（单频刺激）。比较不同频率（500、1000、2000、4000Hz）下不同听力水平组（≤20、21～39、40～59、60～79、≥80dB）的ASSR阈值与PTA阈值之间的关系。结果各频率的ASSR阈值与PTA阈值均具有良好的相关性。但各频率下不同听力水平校正后的校正值均高于PTA阈值。结论应用ASSR阈值进行听阈级评估时需要进行校正,ASSR检测技术可以用于听力障碍法医学鉴定听阈级评估。

The correlativity between the threshold acquired with ASSR and PTA

Objective To explore the correlativity between the thresholds acquired with auditory steady-state responses（ASSR） and pure tone audiometry （PTA）. Methods Eighty-six subjects with normal and abnormal hearing（172 ears） were tested with ASSR and PTA at 500, 1 000, 2 000, 4 000 Hz to get the thresholds of ASSR （single frequency） and PTA. Correlation analysis were done between the thresholds acquired with ASSR and VIA at different frequency（500, 1 000, 2 000, 4000 Hz） for each different hearing loss degree（≤20, 21-39, 40-59, 60-79, ≥80 dB）. Results At each frequency, there was a close correlativity between the thresholds acquired with ASSR and PTA. The rectified threshold of ASSR and PTA at different frequency and hearing loss degree had been obtained. Conclusion The rectified ASSR threshold could be applied as an objective method for evaluating hearing loss to distinguish malingering deafness in the practice of forensic medicine.