• Journal of Preventive Medicine and Public Health
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• v.17 no.1
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• pp.239-243
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• 1984

The vascular reaction such as the indirect blood pressure and the pulse rate of the tail to the noise were examined in 8 naive Sprague-Dawley rats of both sexes. The sounds used in the experiment were 1KHz and 4 KHz, 95dB pure tone generated by Nagashima Audiometry. The indirect blood pressure and the pulse rate were checked at the rat tail by Polygraph at 5 minutes interval. The results were as follows: 1. The blood pressure and the pulse rate increased maximally 5 minutes after the exposure to both sounds. 2. The blood pressure and the pulse rate returned normal range within 20 minutes after the exposure of both sounds. 3. The increment of the blood pressure and the pulse rate was greater after the sound of 4KHz than after that of 1KHz, but it wasn't statistically significant.

• Proceedings of the KOR-BRONCHOESO Conference
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• 1987.05a
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• pp.9.1-9
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• 1987

뇌간유발청력검사는 최근 들어 신생아 및 영유아에 있어 청력 및 청신경로의 성숙(auditory maturation)정도를 파악할 수 있는 객관적인 진단 방법으로 평가되고 있다. 그러나 상기 검사결과는 측정계기의 종류 및 측정방법에 따라 다소 차이를 보일 수 있다. 우리나라에서는 아직 정상 신생아를 대상으로 뇌간유발청력검사에 대한 보고가 없는 실정이다. 이에 본 교실에서는 87년 3~4월에 Severance병원에서 출생한 정상 신생아 20명을 대상으로, 출생 후 16내지 69 시간내 두 차례에 걸쳐 뇌간유발 전달시간 및 뇌간유발 역치를 측정, 다음과 같은 결과를 얻었기에 보고하는 바이다. 1) 72.5 ㏈, 4KHz click에 대한 평균 절대적 latency는 각각 I(1.68), II(2.74), III(4.33), IV(5.71), V(6.77), Ⅵ(8.16), Ⅶ(9.85)였고 tone pip은 각각 I(2.04), II(3.04), III(4.60), IV(5.75), V(7.14), Ⅵ(8.54), Ⅶ(10.60) 이었다. 2) 평균 뇌간전위 유발역치는 29.5㏈ SPL 이었다. 3) 파형은 A형이 1.7%, 3형이 30.2%, C형이 45.7%, D형이 5.2%, E형이 1.7%, F형이 15.5%이었고, click과 tone pip, 자극음의 강도, ISI에 따른 차이가 없었다. 4) 제1소파에서 제5소파까지의 절대적 latency와 I- III, III-V,및 I-V의 상대적 latency에 있어서, 반복율, 자극음 종류 및 첫째날과 둘째날의 비교치에 있어서만이 선택적으로 유의한 차이가 발생하였으며, 자극음의 크기에는 차이가 나타나지 않았다.

• Proceedings of the KOR-BRONCHOESO Conference
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• 1987.05a
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• pp.11.3-12
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• 1987

삼출성 중이염은 소아연령군의 이비인후과질환중 유병율이 가장 높은 질환의 하나로 1867년 Politzer가 최초로 기술하고 치료법을 소개한 이후 그 병인 및 치료법이 다양하게 연구 개발되어 왔으며 1950년대 및 1960년대 electroacoustic impedance unit의 발전에 따라 진단법에 많은 변혁이 이루어졌다. 연자들은 1981년 1월1일 부터 1986년 12월31일까지 삼출성 중이염으로 중이내 통기관유치술 및 고막천자를 시행한 15세 이하의 290명의 환자를 대상으로 tympanogram의 양상 및 술전 기골도차를 조사하여 중이내 삼출액의 유무 및 점성도의 예측도에 대하여 살펴 보았다. Tympanometric peak pressure (T. P. P.) 가 -50mm$H_2$O 미만이며 compliance가 0.4 c.c.미만인 영역을 B영역으로. T.P.P.가 -50mm$H_2$O 미만이며 compliance가 0.4 c.c. 이상인 영역을 C영역으로 정하였을 때 중이내 삼출액 유무의 예측도는 B영역이 87.5%. C영역은 81.48%였으며 삼출액이 장액성일 경우의 예측도는 B영역이 24.51%, C영역이 22.72%이었고, 삼출액이 점액성일 경우의 예측도는 B영역이 70.39%, C영역이 54.54%이었다. 연령을 15세 - 7세군과 6세이하의 군으로 세분하였을 경우에도 비슷한 결과를 얻었다.

• Proceedings of the KOR-BRONCHOESO Conference
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• 1987.05a
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• pp.10.1-10
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• 1987

표준청각검사와 자기청력검사는 청력역치의 측정으로 난청의 종류를 구별하고 누가현상유무를 판정하며, 사청검사를 할 수 있는 공통점을 갖고 있다. 그러나 표준청력검사는 동일강도의 음을 부여하는 대신 자기청력검사는 음의 증강 및 감약이 계속되는 음을 부여하는 점이 양자의 상이점이다. 이런 차이로 인해 자기청력검사에는 일과성 역치 상승(temporary threshold shift)현상이 일어나 청력 역치가 높을 수 있다. 양자의 역치차가 각 청력군별로 어느 정도차이가 있는가를 관찰할 목적으로 정상청력군 50명 (100이), 전음성 난청군 41명(50이), 감각신경성 난청군 38명(50이)을 대상으로 표준 및 자기청력검사의 기도측정을 실시하여 양 검사의 차를 구하고 그 결과를 다음과 같이 요약하였다. 1) 정상청력군과 전음성 및 감각신경성 난청군 모두 자기역치가 표준역치 보다 높게 측정되는 경향으로 난청군에서 더욱 높게 측정되었다. 그러나 자기역치가 낮은 예도 많았다. 2) 양 검사의 일치범위를 $\pm$10㏈로 하면 정상 청력군은 94%, 전음성 난청군 85%, 감각신경성 난청군 79%에서 양 검사가 일치하였다. 3) 자기역치에서 표준역치를 추정할 수 있는 범위는 정상군에서는 5~-l0 ㏈, 난청군에서는 5~-15 ㏈ 의 변동폭이었다. 4) 양 검사의 역치차가 $\pm$20 ㏈이상인 예도 많아 양 검사는 서로 독립된 검사라고 생각되었다.

• Journal of the Ergonomics Society of Korea
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• v.15 no.1
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• pp.79-90
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• 1996

A research project was conducted to assess the levels of noise exposed to "Noraebang" users and potential hazards to noise-induced hearing loss due to commercial Noraebang noise. A two-way, mixed-factors factorial design was employed for the experiment using independent variables of "noise source" (no- singer, 1-singer, and 2-singer conditions) and "music type" (Trot, Ballad, and Rock music) with 18 normal hearing subjects. Each singer group sang 5 popular songs of each music type in each signing condition, whereas background music was just played for the no-singer condition. For each music played/sung, equivalent continuous sound pressure levels and maximum sound pressure levels were measured for data analysis purposes. Pure-tone audiometry was applied for measuring subjects' hearing threshold levels before and after exposure to Noraebgang noise. The statistical analyses indicate that average continuous noise levels due to Noraebang leisure environment were very serious, especially when two people were singing (higher than 95 dBA). Furthermore, maximum noise levels often exceeded the OSHA's non-premissible 115 dBA level. Worse yet, hearing loss assessment implies that Noraebang facilities may pose a serious threat to noise-induced hearing loss, based on 6-8 dB loss at 125 Hz and 8 dB loss at 4000 Hz after about 1-hour Noraebang noise exposure.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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• v.29 no.2
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• pp.98-105
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• 2016

Objectives : The purpose of this study is to report the Korean medical treatment on sudden sensorineural hearing loss(SSNHL). Methods : The patient who has been diagnosed SSNHL had symptoms with hearing loss, tinnitus, and aural fullness. The patient was received outpatient to Dunsan oriental hospital for 3 months and was treated with oriental medicine(acupuncture, herbal-medicine, converting of Hominis placenta, warm needling and vapor treatment). Two approaches were used in order to evaluate the effect of the treatment. The hearing recovery was measured with pure tone audiometry, and the decrease of tinnitus and aural fullness was identified by patient's subjective expression. Results : The patient has his hearing restored fully and the symptoms of SSNHL accompanied with adjunctive symptoms including tinnitus and aural fullness were improved.Conclusions : This study shows that the Korean medical treatment effects on the SSNHL.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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• v.26 no.2
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• pp.98-108
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• 2013

Objectives : Sudden sensorineural hearing loss(SSNHL) is defined as an unexplainable decline in hearing which o㏄urs within a short period of time. This study describes a case of SSNHL accompanied by many unfavourable prognosis factors including severe vertigo. Methods : We treated 1 SSNHL patient who had many unfavourable prognosis factors including severe vertigo. After Korean medical treatment for 23 days, we measured the hearing recovery and decrease of vertigo. For diagnosis, pure tone audiometry was done. The degree of improvement was evaluated by Siegel's Criteria. Decrease of vertigo was assessed by Vertigo Scale. Results & Conclusions : The pure tone 5 frequency(0.25, 0.5, 1, 2, $4_{KHz}$) average improved by 25dB(slightly recovered). Vertigo score decreased from 4 to 1. We may expect that the Korean medical therapy improves the hearing recovery in the SSNHL patients who have unfavourable prognosis factors such as vertigo.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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• v.34 no.3
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• pp.102-111
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• 2021

Objectives : The purpose of this study is to report the case of a presbycusis patient whose hearing had improved. Methods : A 81-year-old male diagnosed with presbycusis were treated with Korean medical interventions (acupuncture combined with electromagnetic stimulation and pharmacoacupuncture) and Threshold sound conditioning(TSC) for 3 months. Pure tone audiometry(PTA) was performed for the evaluation. Results : The patient's hearing was improved from moderate to mild level according to the Classification of Hearing Loss(International Organization for Standardization, 1969). The average hearing were improved from 40.5 dB to 32.7dB on the left side, 46.9dB to 34.1dB on the right side. Conclusions : We observed an improvement in a presbycusis patient's hearing and hereby suggest the possibility of Korean medical treatment and TSC's ameliorating effect on sensorineural hearing loss as well as prebyscusis.

• Journal of Audiology & Otology
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• v.25 no.4
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• pp.217-223
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• 2021

Background and Objectives: In cochlear implant (CI) surgery, the results and causes of revision and reimplantation may guide surgeons in establishing surgical protocols for revision surgery with safe audiological outcomes. The aim of this study was to review our experience in terms of etiology, surgical strategy, and hearing outcomes in pediatric patients who underwent CI removal and reimplantation. Subjects and Methods: All patients received implants of the same brand. Pre and postoperative Categories of Auditory Performance score and aided free-field pure tone audiometry thresholds were noted. In vivo integrity tests were performed for each patient and the results of ex vivo tests of each implant were obtained from manufacturer. Results: A total of 149 CIs were placed in 121 patients aged <18 years. The revision rate in children was 6.7% (10/121 children). Six patients had a history of head injury leading to a hard failure. The causes of reimplantation in others were soft failure (n=1), electrode migration (n=1), infection (n=1), and other (n=1). All patients showed better or similar postreimplantation audiological performance compared with pre-reimplantation results. Conclusions: It is very important to provide a safe school and home environment and educate the family for reducing reimplantation due to trauma. Especially for active children, psychiatric consultation should be continued postoperatively.

• Journal of Audiology & Otology
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• v.25 no.2
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• pp.104-109
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• 2021

Background and Objectives: To assess whether the audiological and clinical outcomes of type 0 tympanoplasty (T0) performed using cartilage were comparable with those of ossiculoplasty in patients who underwent canal wall down mastoidectomy (CWDM). Subjects and Methods: This study included patients who had chronic otitis media with cholesteatoma and underwent CWDM with ossiculoplasty involving partial ossicular replacement prosthesis (PORP), total ossicular replacement prosthesis (TORP), or T0. Anatomical success rates and hearing outcomes were analyzed. Results: Seventy-two patients were included in this study; 29 of them underwent CWDM with T0, 27 underwent CWDM with PORP, while 16 underwent CWDM with TORP. The difference in mean improvement in the air-bone gap (ABG) between the groups was not significant. The differences in the rates of ABG closure to ≤10 dB HL (p=0.030) and ≤20 dB HL (p=0.029) were significant. There were significant differences in improvements in the ABG at 3 kHz among the PORP, TORP, and T0 groups. Conclusions: The audiological outcomes of CWDM with ossiculoplasty seemed to be better than those of CWDM with T0 with no significant difference in the incidence of complications following ossiculoplasty and T0.