Silastic을 이용한 내전 갑상성형술-적용 및 술기

최홍식,Choi, Hong-Shik 대한후두음성언어의학회 2007 대한후두음성언어의학회지 Vol.18 No.1

Unilateral vocal fold paralysis resulting in glottal incompetence can cause significant morbidity attributable to impaired speech, swallowing, and ability to protect the airway. The treatment of unilateral vocal cord paralysis has a long history, marked by technical innovations and improvements. These methods typically use endoscopic injection or implants to augment the volume of the affected vocal fold. The first known treatment, reported by Brunnings in 1911, was paraffin injection. The first thyroplasty medializing the paralysed vocal cord was performed by Payr in 1915 ; here, a cartilage door-flap was created from the thyroid ala to obtain better voice quality. In the 1970s, Isshiki systematized and developed the use of the external medialization by Payr. Later he modified his original technique, and achieved safer and better results. Many other methods were introduced for external medialization during the 1980s and 1990s. There has been couple of materials using for medialization laryngoplasty: silicone bloc, cartilage, goretex (polytetrafluoroethylene), titanium, etc. Among them, silicone bloc is the most popularly used material. Type I thyroplasty in combination with arytenoid adduction is a proven technique for medialization of the paralysed vocal fold. In this paper, personal experience for using silicone bloc type I thyroplasty : decision making and practical points, long-term results and complication of the procedure will be discussed.

585-nm Pulsed Dye LASER를 이용한 성대 폴립의 치료

최홍식,이근완,김민호,권순호,전주현,김광문,Choi, Hong-Shik,Lee, Kun-Wayn,Kim, Min-Ho,Kwon, Soon-Ho,Jeon, Ju-Hyun,Kim, Kwang-Moon 대한후두음성언어의학회 2007 대한후두음성언어의학회지 Vol.18 No.1

Background and Objectives: The 585-nm pulsed dye laser (PDL) has recently been adopted by otolaryngologists because of its epithelial-sparing properties. Many authors have reported the use of PDL for treatment of various vocal cord lesions. This purpose of this study is to examine the effectiveness of 585-nm PDL in the treatment of vocal polyp. Materials and Methods: Eight patients with vocal polyp were treated with 585-nm PDL from Sep. 2006 to Nov. 2006 in Yong-dong Sevrance hospital. 5 of them went through local anesthesia and 3 of them went through general anesthesia. In order to control laser fiber, flexible digital transnasal laryngoscope was applied under local anesthesia and general anesthesia using LMA, and micromanipulator was used under general anesthesia using endotracheal tube. The evaluations of vocal function was done at pre-and postoperation. Results: All patients improved in the perceptual evaluation of voice after PDL surgery. The aerodynamic study revealed that 5 of 8 patients showed improvement in maximal phonation time, and 6 of 8 showed improvement in mean airflow rate during phonation. The acoustic analysis revealed that all patients showed improvement in Jitter and Shimmer, and 7 of 8 showed improvement in noise to harmony ratio. Conclusion: This study demonstrates promising results in the efficacy of 585-nm PDL for the treatment of vocal polyps, and it illustrates a new option for vocal polyp treatment as well as the advantage of PDL surgery.

우리나라 이비인후과 외래환자의 인.후두 역류증상 발병빈도 조사(One Week Survey 결과)

최홍식,김형태,서장수,왕수건,조재식,최건,홍기환,김석일,이원철,Choi, Hong-Sik,Kim, Hyung-Tae,Seo, Jang-Soo,Wang, Soo-Gun,Cho, Jae-Sik,Choi, Gun,Hong, Ki-Hwan,Kim, Seok-Il,Lee, Won-Chul 대한후두음성언어의학회 2000 대한후두음성언어의학회지 Vol.11 No.1

1999년 4월 일주일간 전국 101개 병의원의 이비인후과 외래를 방문한 신환을 대상으로 설문을 실시하고 이비인후과 전문의의 진찰을 통하여 인.후두 위산역류중(LPR)의 발병빈도와 그와 관련된 사항들을 조사하여 다음과 같은 결과를 얻었다. 1) 이비인후과 신환 전체 진단 병명의 24%, 이비인후과 신환 환자 중 25%에서 LPR 관련 증상 또는 진찰소견이 확인되었다. 2) LPR 관련 진단명으로는 인두이물감증후군(Glo-bus syndrome)이 27%로 가장 많았으며, 역류성후두염, 만성후두염 등의 순이었다. 3) 여성에서 남성보다 많았으며, 40, 50, 60대에 흔하여 노인성 변화와의 관련이 의심되었다. 4) 비만도와는 큰 상관관계가 없었음. 5) LPR의 3대 주증상은 인두이물감, 만성적 목청소, 원인모를 쉰 목소리였음. 6) LPR을 악화시키는 요인으로는 피곤함, 정신적 스트레스, 술, 담배, 자극성있는 음식, 커피 등이었음. 7) 목소리를 직업적으로 쓰는 사람에서 LPR 증상의 발현이 높았음. 8) 과거 병력상 위질환과 잦은 편도염이 많았음. One week survey to investigate the prevalence rate and clinical characteristics of laryngopharyngeal reflux symptoms in Korea. The subject(n=7,704 patients) was newly enrolled patients at the out patient clinic in 90 ENT departments of resident training hospitals and 11 local clinics, which were voluntarily participated in the study 1) Twenty five percent of all enrolled patients has LPR-related symptoms or clinical findings from the examination by ENT specialists. 2) Among e name of LPR-related diagnosis, globus syndrome was e most common, and follows by reflux laryngitis, and chronic laryngitis. 3) Women was more prevalent than men, and it is common in 5th, 6th, and 7th decades, which seems to be related with aging process. 4) Most popular symtoms of LPR. were globus sensation, conic throat clearing, and hoarseness of unknown origin. 5) Aggravating factors of LPR-related symptoms were tiredness, mental stress, drink alcohol, cigarettes smoking, spicy food, and drinking coffee. 6) LPR-related symptoms were more common in professional voice users. 7) In past medical history, diseases of stomach and tonsillitis were most common.

연축성 발성장애(Spasmodic Dysphonia)에 대한 보톡스 주입치료

최홍식,Choi, Hong-Shik 대한후두음성언어의학회 2012 대한후두음성언어의학회지 Vol.23 No.2

Spasmodic dysphonia is a chronic, focal, movement-induced, action-specific dystonia of the laryngeal musculature during speech. It can have a profound effect on quality of life, severely limiting people's communication, especially via telephone and in noisy backgrounds. Spasmodic dysphonia (SD) is usually of the adductor type characterized by glottic contractions causing tightness and voice breaks with forced-strangled voice, but it may also be abductor type or, much less commonly, mixed. Treatment options for adductor spasmodic dysphonia (ADSD) include voice therapy, surgical procedures, and botulinum toxin injections (Botox). The use of Botox injected into the laryngeal muscles remains the "gold standard" treatment for reducing the vocal symptoms of ADSD and Botox induces a temporary paresis of the laryngeal muscles and provides short-term relief of symptoms. Repeated injections of the laryngeal muscles, generally every 3-4 months, are required for continuous relief of symptoms. Improvement in vocal function has been reported after use of Botox injections, though a completely normal voice is rarely achieved. In this hospital, 1,030 patients have been enrolled for Botox injection therapy so far (May, 2012). In this review article, I'd like to present my personal experience of management of spasmodic dysphonia mainly by Botox injection.

금속 및 금속염계 항균제가 혼입된 항균 콘크리트 개발

최홍식,허권,이호범,이시우,곽홍신,Choi, Hong-Shik,Heo, Kwon,Lee, Ho-Beom,Lee, Si-Woo,Kwak, Hong-Shin 한국건설순환자원학회 2013 한국건설순환자원학회 논문집 Vol.1 No.2

하수시설 및 복개 구조물 등은 용해 시 산성으로 작용하는 황화수소에 크게 노출되어, 황산화균의 작용에 의해 강산성의 황산이온이 생성된다. 이에 따라 콘크리트의 생화학적 부식에 의한 열화가 촉진되며, 콘크리트 손상을 더욱 가속화하여 내구성이 크게 저하될 수 있다. 본 연구에서는 콘크리트에서 황산화균이 유기 생체적으로 사용하는 황화수소를 제거하기 위해, 금속의 살균성을 이용하여 금속 및 금속염 분말을 콘크리트에 혼입한 후, 황산화 억제 성능을 평가하였다. 이를 위해 중성화한 콘크리트 시편의 황산화균에 대한 항균 성능을 비교 평가하였고, 급속 염소이온 침투시험을 통해 금속 및 금속염계 항균제 첨가량에 따른 콘크리트 염화물 침투깊이 및 확산계수를 측정하였다. 또한 야외에서 폭로시킨 콘크리트 시편의 표면 상태의 생화학적 상태를 관측하여, 항균콘크리트의 성능 및 적용성을 확인하였다. In the sewage structures and wastewater facilities, concrete is exposed to hydrogen sulfide ($H_2S$) which acts as an acid material in a solution, and a strongly acidic sulfate ion ($SO{_4}^{-2}$) is generated by a sulfuric bacteria. Hence, a degradation of concrete with biochemical corrosion would be accelerated. Finally, durability of concrete and concrete structures may be greatly reduced. In this study, in order to remove the hydrogen sulfide which is used by the sulfuric bacteria organic-biologically, the antibiotic metal and metallic salt powders were mixed to concrete, and a suppressing performance of the sulfate ion was assessed. For the sulfuric acid bacteria, a comparative evaluation of antimicrobial performance on neutralized concrete specimens were carried out, also by a rapid chloride penetration test, chloride penetration depths and diffusion coefficients were measured for antibiotic concrete in accordance with the amount of metal and metallic salt-based antibacterial agents. Eventually, by an observation of the biochemical state of the surface of concrete specimens exposed outdoors, the performance and applicability of antibiotic concrete were confirmed.

서양식 성악발성법의 의학적 이해

최홍식,홍현준,염용혁,남도현,Choi, Hong-Shik,Hong, Hyun-Jun,Yum, Yong-Hyuk,Nam, Do-Hyun 대한후두음성언어의학회 2011 대한후두음성언어의학회지 Vol.22 No.2

Western classical singing voices are different from those of pop song singer's singing voices as well as traditional Korean singing such as Pansori. We anlalysed the singing voices from three different categories with using free application programs available at the usual smart phones : sound level meter and Spectral View Analyzer and fiberoptic rhinolaryngoscopic evaluation. The intensity of voice produced by a classical western singer was 11 dB louder than that produced by a pop song singer. Source sound, glottic sound, as well as harmonic sound and singing resonant sound (Singer's formant) are much more prominent. When evaluated under video-rhinolaryngoscopy during singing, the resonance cavity especially oropharyngeal cavity and hypopharyngeal cavity are widely opened during singing of the western classical singer than those of the traditional Korean singer's singing. Difference of singing methods including producing the glottal sound, respiration and resonance are discussed. Possible explanation of development of 'Singer's Formant' is discussed.

정보기술자 사서의 교육에 관한 연구

최홍식,Choi, Hung-Sik 한국과학기술정보연구원 과학기술정보센터 1999 Journal of Information Science Theory and Practice Vol.30 No.1

컴퓨터시스템, 텔레커뮤니케이션, 정보 등 급속하게 발전하고 있는 핵심 정보기술의 발전양상과 이에 대비하기 위한 사서의 교육을 참고업무, 커뮤니케이션 기술, 경영을 중심으로 고찰하였다. This paper observed rapidly changing trends in core information technologies-computer system, telecommunication, information, and challenge of library environments; and discussed desirable librarian education in reference work, communication skill, and library management.

섬여(蟾여)의 독성에 관한 문헌적 고찰

최홍식 ( Hong Sik Choi ),서부일 ( Bu Il Seo ) 대구한의대학교 제한동의학술원 2009 제한동의학술원논문집 Vol.7 No.1

종설(綜說) : 백굴채(白屈菜)의 독성(毒性)에 관한 문헌적 고찰

최홍식 ( Hong Sik Choi ),이상남 ( Sang Nam Lee ),박지하 ( Ji Ha Park ),서부일 ( Bu Il Seo ) 濟韓東醫學術院 2009 東西醫學 Vol.34 No.3

콘크리트 표면밀도 증가에 의한 원전구조 성능개선 연구

최홍식(Choi, Hong Shik),이시우(Lee, Si Woo),허권(Heo, Gweon),이상민(Lee, Sang Min) 한국콘크리트학회 2006 한국콘크리트학회 학술대회 논문집 Vol.2006 No.5