0-6岁听力损失儿童短纯音诱发的听性脑干反应研究

OBJECTIVE: To evaluate the feasibility of tone burst- evoked Auditory Brain Stem Responses (ABRs) in estimating hearing level of children with hearing loss by comparing the thresholds of tone burst- evoked ABRs with 40Hz Auditory Events Related Potentials (AERPs) and click-evoked ABR. METHODS: Thresholds of click- and tone burst-evoked ABR and 40Hz AERP were tested in children of 0 to 6 years old with hearing loss, totally 43 children 85 ears ( male/female = 27/16 ). RESULTS: The linear regression coefficients between thresholds of tone burst-evoked ABR and 40Hz AERP were 0.84, 0.80 and 0.80 for the frequency of 0.5 kHz, 1 kHz and 2 kHz, and the difference between them were 3.6±12.2, 5.9±14.8 and 1.7±13.7 dB respectively. The linear regression coefficients between thresholds of 0.5 kHz、1 kHz、2 kHz、4 kHz tone burst-evoked ABR and the thresholds of click-evoked ABR were 0.81, 0.89, 0.94 and 0.91 respectively and the difference of threshold between them were 6.6±13.4, 0.2±10.7, 1.5±8.1 and 4.2±10.2 dB。The linear regression coefficient between the average thresholds of 2 kHz and 4 kHz tone burst-evoked ABR and thresholds of click-evoked ABR was 0.93, and the threshold difference between them was 2.8±8.3 dB. CONCLUSIONS: The thresholds of tone burst-evoked ABR were useful in predicting the hearing level of children.