추체첨부 진주종에서의 내시경 사용을 접목한 중두개와 접근법의 유용성

양찬주,하승철,정종우 대한두개저학회 2016 대한두개저학회지 Vol.11 No.1

The endoscope has clear advantages over the microscope for visualization and instrumentation in the hidden regions, thus the use of endoscope has led to new treatment options in field of otology. Although approach to petrous apex (PA) creates difficulty in treatment, recent progresses in endoscopic surgery, using image guided system, allow removal of the PA cholesteatoma by endoscopically. Endoscopes can be used as an adjunctive tool when the lesion extends around the cochlea, the labyrinth and the internal auditory canal. Here, we report 2 cases of PA cholesteatoma that was treated by middle cranial fossa approach with endoscopic assisted technique and discuss about the usefulness of endoscopic assisted technique to PA cholesteatoma.

Influences of Diabetes on Hearing Recoveryin Noise-Exposed Mice

양찬주,이지원,정종우 대한청각학회 2015 Journal of Audiology & Otology Vol.19 No.3

Background and Objectives: Many studies have reported an association between diabetes and hearing loss. However, these reports were mainly abstractive correlations between common hearing loss and the incidence of diabetes. Therefore, we evaluated the impact of diabetes on the occurrence of and recovery from noise-induced hearing loss. Materials and Methods: We used 5-week-old C57BLKS/J-m wild type (+/+) and C57BLKS/J-db/db male mice as the control and diabetic groups, respectively. In one set of experiments, the hearing levels of control and diabetic mice were measured weekly for 7 weeks. In a second set of experiments, control and diabetic mice were exposed to broadband white noise of 110 dB SPL for 3 hours; hearing levels were analyzed before and immediately after exposure, 1, 3, and 5 days, and 1, 2, 3, and 4 weeks after the noise exposure. Results: The hearing levels of the control group were better than those of the diabetic group at each weekly revision for 7 weeks at all auditory brainstem response frequencies (4, 8, 16, and 32 kHz). After noise exposure, both groups of mice showed an immediate increase in the hearing level threshold at all frequencies. Subsequent threshold recovery was seen in both groups with no difference in the hearing level recovery rates between the two groups. Conclusions: Hearing level with aging becomes significantly impaired earlier in diabetic mice but hearing recovery after noise exposure is similar between diabetic and control mice. Background and Objectives: Many studies have reported an association between diabetes and hearing loss. However, these reports were mainly abstractive correlations between common hearing loss and the incidence of diabetes. Therefore, we evaluated the impact of diabetes on the occurrence of and recovery from noise-induced hearing loss. Materials and Methods: We used 5-week-old C57BLKS/J-m wild type (+/+) and C57BLKS/J-db/db male mice as the control and diabetic groups, respectively. In one set of experiments, the hearing levels of control and diabetic mice were measured weekly for 7 weeks. In a second set of experiments, control and diabetic mice were exposed to broadband white noise of 110 dB SPL for 3 hours; hearing levels were analyzed before and immediately after exposure, 1, 3, and 5 days, and 1, 2, 3, and 4 weeks after the noise exposure. Results: The hearing levels of the control group were better than those of the diabetic group at each weekly revision for 7 weeks at all auditory brainstem response frequencies (4, 8, 16, and 32 kHz). After noise exposure, both groups of mice showed an immediate increase in the hearing level threshold at all frequencies. Subsequent threshold recovery was seen in both groups with no difference in the hearing level recovery rates between the two groups. Conclusions: Hearing level with aging becomes significantly impaired earlier in diabetic mice but hearing recovery after noise exposure is similar between diabetic and control mice.

비디오두부충동검사에 대한 고찰

양찬주,박홍주 대한이비인후과학회 부산,울산,경남 지부회 2017 임상이비인후과 Vol.28 No.1

이경화증이 동반된 상반고리관피열증후군 환자 1예

양찬주,김신애,이환서,박홍주 대한이비인후과학회 2016 대한이비인후과학회지 두경부외과학 Vol.59 No.1

Superior semicircular canal dehiscence (SSCD) syndrome and otosclerosis have overlapping clinical manifestations that can be difficult to distinguish. Audiovestibular symptoms are caused by noise or straining in SSCD, which is associated with the presence of an air-bone gap that overlaps with the characteristic of otosclerosis. We recently examined a 51-year-old woman presenting with unilateral pulsatile tinnitus and ipsilateral hearing loss in the left ear. Computerized tomography, audiometry and vestibular function test confirmed the diagnosis of ipsilateral SSCD syndrome with coexisting ipsilateral otosclerosis. The patient underwent surgical repair of dehiscence by middle fossa approach and stapes surgery for otosclerosis sequentially. She has not had pulsatile tinnitus postoperatively, and hearing improved with the closure of air-bone gap at most frequencies. In conclusion, when SSCD syndrome and otosclerosis coexist and patient has representative symptoms of both ear pathologies, a sequential surgery can be an effective treatment option. Korean J Otorhinolaryngol-Head Neck Surg 2016;59(1):68-72

소아 선천성 진주종 제거 시 내시경을 이용한 수술의 유용성

양찬주,김성희,정종우 대한이비인후과학회 2016 대한이비인후과학회지 두경부외과학 Vol.59 No.3

Background and Objectives The use of endoscope has led to new treatment options for middle ear pathologies. The aim of this study is to report on endoscopic ear surgeries for the removal of middle ear cholesteatoma and discuss about the usefulness of endoscopic approach to congenital cholesteatoma in children. Subjects and Method Five pediatric patients with congenital cholesteatoma were enrolled in this study. Cholesteatoma was removed via transcanal endoscopic approach in all patients. Medical records were reviewed retrospectively. We analyzed the clinical characteristics, surgical management and treatment outcomes. Results The average age of patients was 3.7 years. Cholesteatoma was observed in the anterior portion of tympanic membrane in four patients, and in the posterior portion in one patient. Endoscopic techniques were used exclusively in four patients, but one patient was treated by microscopic approach using a combined technique. Cholesteatoma was fully removed and we confirmed by endoscopic examination that no remnant lesions remained. Surgical complications such as vertigo, sensorineural hearing loss, infection, or bleeding were not seen postoperatively. Average hospital stay was 1.2 days. Conclusion Results showed that this technique was beneficial for treating cholesteatoma in limited cases. Endoscopic surgical techniques produced good intraoperative and postoperative results in removing pediatric congenital cholesteatoma and will gain importance in the otological surgery in the future. Korean J Otorhinolaryngol-Head Neck Surg 2016;59(3):194-201

유전성 출혈성 모세혈관 확장증에 의한 비출혈 환자에서 비중격식피술의 유용성

양찬주,이봉재,장용주 대한이비인후과학회 2015 대한이비인후과학회지 두경부외과학 Vol.58 No.5

Background and Objectives Epistaxis is the most common symptom in patients with hereditary hemorrhagic telangiectasia (HHT). The aim of this study is to report treatment of severe epistaxis related to HHT with the septodermoplasty and to assess patient outcomes. Subjects and Method Six patients with HHT who underwent septodermoplasty from 2009 to 2013 were reviewed retrospectively. We analyzed the clinical characteristics, surgical management and treatment outcomes. Results Three patients had been diagnosed with definite HHT and three patients with possible HHT. Three patients had combined abnormal vascular structures in visceral organs. The mean preoperative and postoperative hemoglobin were 7.2 g/dL and 12.8 g/dL, respectively, and visual analogue scale score for frequency and intensity of nasal bleeding remarkably decreased after septodermoplasty in all patients. Conclusion Septodermoplasty was a safe and efficacious procedure for reducing the frequency and severity of bleeding in most patients with intractable epistaxis and HHT.

대학생의 취업 준비 시작 시기에 따른 학업성취 및 노동시장 이행 성과 분석

문찬주(Moon Chan ju),양찬주(Yang Chan ju),나윤진(Na Yoon jin),남인혜(Nam In hye),정동욱(Jeong Dong uk) 한국교육재정경제학회 2018 敎育財政 經濟硏究 Vol.27 No.3

본 연구는 4년제 대학생의 취업 준비 시작 시기별로 학업성취 및 노동시장 성과에 미치는 영향이 어떠한지 실증적으로 분석하였다. 이를 위하여 한국고용정보원에서 제공하는 대졸자직업이동경로조사(Graduates Occupational Mobility Survey: GOMS)의 2015년도 자료를 활용하였다. 취업 준비 시작 시기를 1학년, 2학년, 3학년 이상 시점으로 구분하여, 취업 준비 시작 시기에 따라 졸업 평점과 취업 여부 및 임금에 미치는 영향을 분석하였다. 통상최소자승회귀분석과 로지스틱 회귀분석을 사용하였고, 엄밀한 효과 추정을 위해, 다중처치 상황에서 표본선택편의를 보정할 수 있는 일반화경향점수(Generalized propensity score)를 활용하였다. 주요 분석 결과는 다음과 같다. 첫째, 취업 준비 시작 시기별 집단 간 개인특성이나 학교특성에는 큰 차이가 없었다. 둘째, 3학년 이상 집단에 비해 2학년 시작 집단의 졸업 평점이 유의하게 높았다. 셋째, 3학년 이상 집단에 비해 1학년 시작 집단과 2학년 시작 집단은 취업확률이 유의하게 낮았지만, 임금은 유의한 차이가 없었다. 따라서 취업 준비를 일찍 시작하는 것이 불리한 조건을 극복하기 위한 선택은 아니며, 이른 취업 준비로 인해 우려했던 바와 같이 학업에 소홀해지는 결과가 나타나지는 않지만, 노동시장 진입 및 성과에도 긍정적인 영향을 미치지는 않아, 과도한 경쟁으로 인한 개인적, 사회적 비용이 발생함을 알 수 있다. 이를 바탕으로 본 연구는 고등교육 측면에서 시기에 맞는 구체적인 진로 및 취업 지원 프로그램 제공이 필요함을, 노동시장 측면에서는 채용 과정에서 결과 지향적 요소 외에 다양한 과정적 요인의 고려가 필요함을 강조하였다. 또한 노동시장에서 실질적으로 작용하지 않는 불필요한 이른 취업 준비로 인한 과도한 경쟁과 사회적 비용을 줄이기 위해, 국가 수준에서 구직자의 생산성을 담보할 수 있는 실무적인 교육 훈련 프로그램의 활성화가 필요함을 제언하였다. The purpose of this study is to empirically analyze the effects of university students’ timing of starting job preparation on academic achievement and labor market outcomes. This study used the data of 2015 graduates of Graduates Occupational Mobility Survey(GOMS), and divided students into three groups: those who started job preparation while in the first grade(first grade group), in the second grade(second grade group), and in the third grade(third grade group). Ordinary least square method were used for the analysis on academic performance and hourly wage, and logistic regression for job acquisition. Also, generalized propensity score(GPS) method was conducted for rigid estimation. Findings are as follows. First, there are no significant difference in personal and school characteristics among three groups. Second, second grade group shows significantly higher academic achievement than the third grade group. Third, first and second grade group shows significantly lower possibilities of job acquisition, while there was no significant difference in hourly wage. Thus, concerns of early job-preparing students being idle in their studies turned out to be untrue. However, it can be said that starting job preparation early do not necessarily result in better labor market outcomes. Based on theses findings, this study suggests that universities should provide timely programs for students’ career planning, and that companies should consider more process-focesed factors than outcome-focused factors when in the hiring process. To reduce unnecessary cost of job preparation, government should operate qualifications for better signaling employee’s productivity.

교사의 수업부담이 학교 학업성취도 수준에 미치는 영향

문찬주,양찬주,김지은 한국교육학회 2018 한국교육학회 학술대회 Vol.2018 No.-

대학생의 생활비 대출과 대학 졸업 및 취업성과 간 관계 분석

문찬주,양찬주,문하은,나윤진,김지은,남인혜,정동욱 한국교육재정경제학회 2018 敎育財政 經濟硏究 Vol.27 No.2

대학교육에서 등록금뿐만 아니라 생활비는 학업에 전념해야 할 대학생들에게 상당한 경제적 부담으로 작용하고 있다 최근 생활비 대출의 수요는 년 억 원에서 년 억 원으로 두 배 가까이 급증하였다 본 연구는 생활비 대출의 고유 효과를 분석하기 위하여 년제 일반 대학 등록금 대출자의 생활비 추가 대출이 졸업소요기간과 취업성과에 미치는 영향을 실증적으로 분석하고 이에 더하여 등록금 대출과 생활비 대출 제도의 효과적 운영을 위한 정책적 제언을 제시하고자 하였다 이를 위해 한국고용정보원에서 제공하는 대졸자직업이동경로조사 의년도 자료를 활용하였으며 종속변수는 졸업소요기간과 취업여부 및 정규직 여부 시간당 임금의 네 가지로 구분하여 살펴보았다 보다 엄밀한 추정을 위하여 표본선택편의 를고려한 경향점수매칭 을 활용하였다 분석 결과는 다음과 같다 첫째 등록금 대출자에 비해 생활비 추가 대출자의 등록금 대출 총액이 더 높으며 사회경제적 배경은 더 낮은 것으로 나타났다 경제적 부담이 비교적 큰 학생들이 생활비 대출 제도를 이용하고 있음을 의미한다 둘째 등록금만을 대출한 집단과 생활비를 추가적으로 대출한 집단 간에 졸업소요기간의 유의한 차이가 나타나지 않았다 이는 생활비 대출지원으로 인해 생활비에 대한 경제적 부담이 큰 학생들의 대학 졸업 소요기간이 늘어나지 않았음을 의미한다 셋째 생활비 추가 대출자는 등록금만을 대출받은 이에 비해 취업할 확률은 높았으나 취업의질 측면에서 정규직에 취업할 확률은 차이가 없었으며 임금이 낮은 직장을 선택함을 알 수 있었다 따라서 등록금 대출자의 생활비 추가 대출이 대학 생활 안정에 기여하는 효과는 인정되나 취업성과에 있어서는 장기적으로 상환부담으로 작용함을 추론해볼 수 있다 이러한 분석 결과를 바탕으로 본 연구는 생활비 대출이 본래 정책 목표인 대학생의 생활안정을 극대화시킴과 동시에 대출 상환부담을 줄이기 위해 정책적 노력이 필요함을 제안하였으며 등록금 대출과 생활비 대출의 구체적 연계 방안 및 생활비 대출의 효과 분석에 대한 후속 연구를 제언 하였다 주제어 등록금

추체첨부 진주종에서의 내시경 사용을 접목한 중두개와 접근법의 유용성

양찬주(Chan Joo Yang),하승철(Seung Cheol Ha),정종우(Jong Woo Chung) 대한두개저학회 2016 대한두개저학회지 Vol.11 No.1

The endoscope has clear advantages over the microscope for visualization and instrumentation in the hidden regions, thus the use of endoscope has led to new treatment options in field of otology. Although approach to petrous apex (PA) creates difficulty in treatment, recent progresses in endoscopic surgery, using image guided system, allow removal of the PA cholesteatoma by endoscopically. Endoscopes can be used as an adjunctive tool when the lesion extends around the cochlea, the labyrinth and the internal auditory canal. Here, we report 2 cases of PA cholesteatoma that was treated by middle cranial fossa approach with endoscopic assisted technique and discuss about the usefulness of endoscopic assisted technique to PA cholesteatoma.