기도, 골도 및 음장조건에서 시행하는 청성지속반응역치 검사에서 전기잡음에 대한 자극변수 신뢰범위

서지정보

· 발행기관 : 한국청각언어재활학회
· 수록지 정보 : 청능재활 / 1권 / 1호
· 저자명 : 한동근, 임덕환

목차

INTRODUCTION
MATERIALS AND METHODS
RESULTS
DISCUSSIONS
CONCLUSIONS
REFERENCES

초록

청성지속반응(auditory steady-state Response, ASSR)은 청각역치의 빠르고 객관적인 평가를 제공하고,14) 청력역치평가를 하기위한 적절한 임상 도구로서 많은 관심의 중심에 있다. 최근에, 광범위하게 사용되는 청각유발전위(auditory-evoked potential) 중에서 청성뇌간반응(auditory brain stem response, ABR)은 전통적인 주관적 검사를 할 수 없는 유아, 어린아동, 중복장애자(multiple handicapped individuals)를 평가한다. 여기서 brief tone 자극의 기도와 골도 전도에 의해 유발된 ABR은 수면 중이거나 편안한 상태의 피검자를 대상으로 청력측정주파수(audiometric frequency)
의 비교적 정확한 역치평가를 제공한다.5)21)24) 그러나 ABR이 가지고 있는 한계점에는 결과 해석에 있어서 검사자의 주관적인 판단에 의존적이고, 검사음인 click음의 단점을 보완하기 위해서 사용하는 tone burst 나 tone pip등을 이용하여 검사를 하면 더 까다롭고, 많은 시간이 소

영어초록

The purpose of this study was to investigate the reliable selection of stimulus parameters in auditory steady-state responses (ASSR) against electrical artifacts under clinical settings of air, bone and field stimulations. Data with these different transducers were obtained
from the mannequin showing the same electrical impedances as in the clinical recording sessions. The amplitude modulation was fixed as 100% with the varied modulating frequency from 20 to 200 Hz and with the varied frequency modulation from 0 to 15%.
The results showed what points should be reviewed carefully in clinical recording sessions of ASSR data. First, the insert phone stimulation led to the highest reliable range of ASSR stimulus parameters while the bone conduction stimulation exhibited the least reliable ranges of stimulation parameters. Second, in this study, even insert phone stimulation led to some artifacts at the limited frequencies of 1, 2 kHz with modulating frequency of 120 Hz. Thus, it would be necessary to pay special attention to reduce electrical noises or to avoid these ranges to improve reliability. Third, the bone stimulation resulted in significant artifacts in the overall ranges of stimulation parameters, so data from bone conduction ASSR suffered from the highest level of influences from electrical artifacts and led to the least reliable interpretation. Fourth, the field stimulation exhibited some false positive responses at 4, 8 kHz with the modulating frequencies of 120 and 160 Hz. Therefore, these ranges should be carefully considered with possible contamination from electrical sources. Finally, the data showed the clinically important ranges against genuine electrical noises while the previous studies
contained responses with mixed noise sources such as electrical, vestibular, and other physiological origins. In conclusion, the clinically safe and reliable ranges of stimulus parameters were estimated for all three stimulation modes. These data will be essential in
interpreting correct ASSR results and in designing more robust data aquisition strategies against various types of artifacts.

KEY WORDS：Auditory steady-state response (ASSR)·False positive·Electrical noises.

참고자료

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