난청 환자에서 청성뇌간반응검사와 순음청력검사 간 주파수별 역치 차이 분석
Difference in Thresholds Between Auditory Brainstem Response Test and Pure Tone Audiometry by Frequency
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Background and Objectives There is no clear standard for the difference in the thresholdsof auditory brainstem response (ABR) and pure tone audiometry (PTA) when using ABR toevaluate the reliability of PTA. Therefore, we assessed the difference in the thresholds of ABRand PTA for each frequency. Consequently, we present here the actual difference values betweenthe two tests that can be used as a reference in the clinic. Subjects and Method We retrospectively assessed the audiometry results of 129 ears. Earsin which the hearing thresholds of each frequency continuously declined were classified as thedownward group. We compared the average of differences between the two tests by frequency. The differences were compared for each hearing level from 50 dB or higher. Results For all ears, the appropriate range of difference value was ±5 dB at 2 kHz. At 1 kHz,the ABR threshold was 10 dB higher than PTA, and it was 10 dB less than PTA at 4 kHz. Inthe downward group, the difference value increased by 10 dB at 1 kHz and 4 kHz. In the subgroupsat each hearing level, the difference value showed similar results (p<0.05). Conclusion The difference in the threshold, regardless of the severity or tendency of hearingloss, was the smallest at 2 kHz and the range was ±5 dB. ABR was 10 dB higher at 1 kHz andand 10 dB lower at 4 kHz than PTA. In the downward group, the difference at 1 kHz and 4kHz increased by 10 dB each.
Abstract
Background and Objectives There is no clear standard for the difference in the thresholdsof auditory brainstem response (ABR) and pure tone audiometry (PTA) when using ABR toevaluate the reliability of PTA. Therefore, we assessed the difference in the thresholds of ABRand PTA for each frequency. Consequently, we present here the actual difference values betweenthe two tests that can be used as a reference in the clinic. Subjects and Method We retrospectively assessed the audiometry results of 129 ears. Earsin which the hearing thresholds of each frequency continuously declined were classified as thedownward group. We compared the average of differences between the two tests by frequency. The differences were compared for each hearing level from 50 dB or higher. Results For all ears, the appropriate range of difference value was ±5 dB at 2 kHz. At 1 kHz,the ABR threshold was 10 dB higher than PTA, and it was 10 dB less than PTA at 4 kHz. Inthe downward group, the difference value increased by 10 dB at 1 kHz and 4 kHz. In the subgroupsat each hearing level, the difference value showed similar results (p<0.05). Conclusion The difference in the threshold, regardless of the severity or tendency of hearingloss, was the smallest at 2 kHz and the range was ±5 dB. ABR was 10 dB higher at 1 kHz andand 10 dB lower at 4 kHz than PTA. In the downward group, the difference at 1 kHz and 4kHz increased by 10 dB each.
참고문헌 (12)
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