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어지럼에서 연관증상에의 접근법: 청각과민, 이루 및 기타 귀 증상
유명훈,박홍주 대한평형의학회 2013 Research in Vestibular Science Vol.12 No.-
A carefully obtained history is most important when evaluating a dizzy patient. Specific symptoms guide the examination and workup, and it is critical for the physician to focus on associated symptoms, in addition to the dizziness complaint itself. Hyperacusis accompanied with vertigo, may be a sign of superior canal dehiscence syndrome, Meniere’s disease, migrainous vertigo, perilymphatic fistula,labyrinthine concussion, and Ramsay Hunt syndrome. Otorrhea, usually a sign of otitis media, can suggest labyrinthine fistula or labyrinthitis as a cause of dizziness. This review describes the evaluation of hyperacusis, autophony, otorrhea and other otologic symptoms (except hearing loss and tinnitus) in patients with dizziness, and related causes of dizziness.
Clinical Application of Video Head Impulse Test in Acute Vestibular Syndrome
유명훈 대한이비인후과학회 2020 대한이비인후과학회지 두경부외과학 Vol.63 No.1
Acute unilateral vestibulopathy (AUV) is the recommended term [rather than the more widelyused ‘vestibular neuritis (VN)’] for all pathologies involving sudden impairment of the unilateralperipheral vestibular function regardless of the exact location of the lesion. Acute vestibularsyndrome (AVS) is an upper-level entity of AUV, which is the most common cause of AVS,and includes acute central vertigo. AVS typically presents with the symptoms of new onset continuousvertigo, gait instability, and nausea/vomiting lasting several days to weeks. The videohead impulse test (vHIT) was recently developed and has been widely adopted at clinics andemergency centers. In this study, we will review the differential diagnosis of AVS using vHIT. In addition, we will describe the subtypes of VN and the use of vHIT for follow-up testing inAVS.
Middle Ear Surgery in Only Hearing Ears and Postoperative Hearing Rehabilitation
유명훈,강병철,박홍주,윤태현 대한청각학회 2014 Journal of Audiology & Otology Vol.18 No.2
Background and Objectives: The aim of this study was to evaluate surgical interventions and hearing rehabilitation in patients with chronic middle ear disease of only hearing ears. Subjects and Methods: Thirty-one patients with chronic middle ear disease of only hearing ears were enrolled in this retrospective study. Patients were classified into three groups according to the hearing level: groups A [pure tone audiometry (PTA)<40], B (40≤PTA<70), and C (PTA≥70). We evaluated hearing results and patterns of auditory rehabilitation. Results: The main consideration for a surgical procedure was the presence of recurrent otorrhea and structural destruction. The reasons for surgical intervention in only hearing ears were otorrhea caused by chronic otitis media (68%), cholesteatoma (29%), and cholesterol granuloma (3%). The causes of contralateral deaf ears were chronic otitis media (81%) and sensorineural hearing loss (19%). Although there was hearing deterioration in some patients with severe hearing loss (PTA≥70), all patients achieved dry ears after surgery and functional hearing using auditory rehabilitation. Hearing aids were used in most patients with moderate to moderately severe hearing loss and cochlear implants were used for auditory rehabilitation in patients with severe to profound hearing loss. Conclusions: Proper evaluation and indications for surgery in only hearing ears are important for successful eradication of inflammation and hearing preservation. Surgical interventions can achieve dry ear and enable further auditory rehabilitations using hearing aids and cochlear implantation.
유명훈,정종우,조양선,최준,정연훈,정재호,한규철,전범조,김동기,김규성,이준호,이규엽,이승환,문인석,박홍주,박시내,이지혜,서재현,여승근 대한이비인후과학회 2022 Clinical and Experimental Otorhinolaryngology Vol.15 No.4
Objectives. The impacts of ventilation tube (VT) type and effusion composition on the VT extrusion rate and complications in children with otitis media remain unclear. This part II study evaluated the factors affecting the extrusion rate, recurrence rate, and complications of VT insertion. Methods. A prospective study was conducted between June 2014 and December 2016 (the EVENT study [analysis of the effectiveness of ventilation tube insertion in pediatric patients with chronic otitis media]), with follow-up data collected until the end of 2017. Patients aged <15 years diagnosed with otitis media with effusion who received VT insertion were recruited at 15 tertiary hospitals. The primary outcomes were time to extrusion of VT, time to effusion recurrence, and complications. Results. Data from 401 patients were analyzed. After excluding the results of long-lasting tubes (Paparella type II and T-tubes), silicone tubes (Paparella type I) exhibited a significantly longer extended time to extrusion (mean, 400 days) than titanium tubes (collar-button-type 1.0 mm: mean, 312 days; P<0.001). VT material (hazard ratio [HR], 2.117, 95% confidence interval [CI], 1.254–3.572; P=0.005), age (HR, 3.949; 95% CI, 1.239–12.590; P=0.02), and effusion composition (P=0.005) were significantly associated with the time to recurrence of middle ear effusion. Ears with purulent (mean, 567 days) and glue-like (mean, 588 days) effusions exhibited a shorter time to recurrence than ears with serous (mean, 846 days) or mucoid (mean, 925 days) effusions. The revision VT rates during follow-up were 3.5%, 15.5%, 10.4%, and 38.9% in ears with serous, mucoid, glue-like, and purulent effusions, respectively (P<0.001). The revision surgery rates were higher among patients aged <7 years than among those aged ≥7 years. Conclusion. Silicone tubes (Paparella type I) were less prone to early extrusion than titanium 1.0 mm tubes. VT type, patient age, and effusion composition affected the time to recurrence of effusion.
회전근개파열 건설근로자의 작업강화훈련(Work Hardening) 적용이 직업복귀에 미치는 영향
유명훈,유두한 한국장애인고용공단 고용개발원 2023 장애와 고용 Vol.33 No.3
Purpose : This study aimed to investigate the application of work hardening training in construction workers with rotator cuff tears and their subsequent return to work. Method: The Korean-Beck Depression Inventory (BDI), the Worker Role Interview(WRI), and the Functional Capacity Evaluation (FCE) were used to assess depression, psychosocial factors, and the level of occupational rehabilitation among workers who participated in work hardening at Hospital D in Daejeon from January 2023, and to plan interventions. work hardening was conducted for 8 weeks for 2 hours daily, and pre- and post-test changes were determined. Results: This study confirms that work hardening has a positive effect on depression, psychosocial factors, and vocational rehabilitation. More case and intervention studies on work hardening in the field of vocational rehabilitation for injured workers are needed. 연구문제 또는 목적: 본 연구는 회전근개파열 건설근로자들을 대상으로 작업강화훈련(work hardening)의 적용과 그에 따른 직업복귀 사례를 알아보고자 하였다. 연구방법: 2023년 1월부터 대전소재의 D병원에서 작업강화훈련(work hardening)에 참여한 회전근개파열 산재근로자를 대상으로 한국판 우울 설문지(K-BDI), 근로자 연할인식 면담도구(WRI), 직업능력평가(FCE)를 이용하여 우울과, 심리·사회적인 요소, 직업복귀수준 상태를 평가하고 다학제적인 중재를 계획하였다. 작업강화훈련(work hardening)은 매일 2시간씩 8주간 훈련을 진행하였으며 전·후 변화를 확인하였다. 결론 또는 시사점:본 연구를 통해서 작업강화훈련(work hardening)이 우울과, 심리·사회적인 요소, 직업복귀에 긍정적인 효과를 주는 것을 확인할 수 있었다. 산재근로자를 대상으로 하는 직업재활분야에서 작업강화훈련(work hardening)에 대한 다양한 사례 및 중재연구가 추가로 연구될 필요가 있다.
유명훈,한영준,송상헌,조인탁,이종호,권혁인 대한전자공학회 2014 Journal of semiconductor technology and science Vol.14 No.5
We have investigated the gate insulator effects on the electrical performance of p-type tin monoxide (SnO) thin-film transistors (TFTs). Various SnO TFTs are fabricated with different gate insulators of a thermal SiO2, a plasma-enhanced chemical vapor deposition (PECVD) SiNx, a 150 oC-deposited PEVCD SiOx, and a 300 oC-deposited PECVD SiOx. Among the devices, the one with the 150oC-deposited PEVCD SiOx exhibits the best electrical performance including a high field-effect mobility (=4.86 cm2/Vs), a small subthreshold swing (=0.7 V/decade), and a turn-on voltage around 0 (V). Based on the X-ray diffraction data and the localized-trap-states model, the reduced carrier concentration and the increased carrier mobility due to the small grain size of the SnO thin-film are considered as possible mechanisms, resulting in its high electrical performance.
Impact of Nicotine Exposure on Hair Cell Toxicity and Embryotoxicity During Zebrafish Development
유명훈,나윤찬,박세미,권순일,임기정,채성원,정학현,최준 대한이비인후과학회 2018 Clinical and Experimental Otorhinolaryngology Vol.11 No.2
Objectives. Nicotine has various adverse effects including negative impacts associated with maternal exposure. In the current study, we examined nicotine-induced damage of hair cells and embryotoxicity during zebrafish development. Methods. Zebrafish embryos were exposed to nicotine at several concentrations (5, 10, 20, and 40 μM) and embryotoxicity were evaluated at 72 hours, including hatching rate, mortality, teratogenicity rate, and heart rate. Hair cells within the supraorbital (SO1 and SO2), otic (O1), and occipital (OC1) neuromasts were identified at 120 hours. Apoptosis and mitochondrial damage of hair cells were analyzed using TUNEL (terminal deoxynucleotidyl transferase-mediated dUTP-biotin nick end labeling) and DASPEI (2-[4-(dimethylamino)styryl]-N-ethylpyridinium iodide) assays, respectively, and changes of ultrastructure were observed by scanning electron microscopy. Results. The control group without nicotine appeared normal with overall mortality and teratogenicity rate <5%. The hatching rate and mortality rate was not significantly different according to nicotine concentration (n=400 each). The abnormal morphology rate (n=400) increased and heart rate (n=150) decreased with increasing nicotine concentration (P<0.05). Nicotine-induced hair cell damage significantly increased as nicotine concentration increased. A significantly greater number of TUNEL-positive cells (P<0.01) and markedly smaller DASPEI area (P<0.01) were shown as nicotine concentration increased. Conclusion. The current results suggest that nicotine induces dose-dependent hair cell toxicity in embryos by promoting apoptosis and mitochondrial and structural damage.