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이승열 ( Seung Yol Lee ),류현호 ( Hyun Ho Ryu ),이춘보 ( Chun Bo Lee ),주은현 ( Eun Hyun Joo ),김성경 ( Seong Kyung Kim ),송치훈 ( Chi Hun Song ),윤광섭 ( Kwang Seop Youn ),이상녕 ( Sang Nyeong Lee ),이장용 ( Jang Yong Lee ),나재 대한산부인과학회 2004 Obstetrics & Gynecology Science Vol.47 No.6
목적 : 골반경하 자궁근종절제술을 시행한 93명의 환자를 대상으로 시행한 수술방법을 간략히 소개하고 임상경과 및 술후 합병증 여부를 분석하여 골반경하 근종적출술의 임상적 안정성 및 유용성에 대해 알아보고자 하였다. 연구 방법 : 2001년 5월부터 2002년 12월까지 20개월간 여수 전남병원 산부인과에서 골반경하 자궁 근종절제술을 시행한 환자 93명의 외래차트와 입원기록지를 가지고 이들의 나이, 출산력, 증상, 근종의 개수, 크기, 무게, 수술시간, 입원기간, 혈색소 감소량, 술후 합병증 등에 대해 후향적 고찰을 하였고 Microsoft Excel로 분석하였다. 결과 : 평균 연령은 42.68 (±5.37)세 였고 평균 출산력은 2.02 (±0.96)회였다. 근종의 개수는 평균 1.70 (±1.27)개였으며 평균 무게는 71.7 (±56.4) gm이었으며 위치는 점막하 근종이 가장 많았고 수술의 적응증이 되는 증상은 과다출혈이 가장 많았다. 평균 수술시간은 101.0 (±30.0)분이었고 술후 평균 혈색소 감소량은 1.40 (±0.81) g/dL이었다. 평균 입원기간은 3.90 (±1.19)일이었다. 술중 합병증으로 투관침 부위 출혈이 2예 있었고, 피하기종이 2예 있었고, 2예에서 개복술로 전환하였다. 술후 합병증은 없었다. 결론 : 본원에서 골반경하 자궁 근종절제술의 적응증을 확대하여 가임기 뿐만 아니라 거의 모든 연령층에 적용하여 심각한 합병증 없이 많은 환자를 수술하였다. 골반경하 자궁 근종절제술을 위한 적절한 시설과 술자의 숙련된 술기가 중요하다 사료되며 앞으로 다양한 기술개발과 훈련으로 근종치료에 있어서 골반경하 자궁근종절제술이 보다 대중화되고 효과적인 수술이 될 것을 기대하는 바이다. Objective : The study was undertaken to evaluate clinical safety and usefulness of laparoscopic myomectomy with analyzing clinical course and postoperative complications of 93 patients underwent laparoscopic myomectomy at Yosu Chon-nam Hospital and to introduce operative methods executed in this hospital. Methods : Total number of patients underwent laparoscopic myomectomy at Yosu Chon-nam Hospital from May 2001 to December 2002 was 93. With ward chart and admission recordings, Age, parity, symtom, size of myoma, number of myoma, location operation time and hemoglobin change were recorded. Data were analyzed with Microsoft Excel. Results : The mean age of patients was 42.68 (±6.05) years. The mean parity was 2.02 (±0.96). The mean number of myoma was 1.70 (±1.27). The mean weight of myoma was 71.7 (±56.4) gm. The most common symtom was hypermenorrhea. The location of myoma was submucosal, intramural, subserosal in large order. The mean operation time was 101.1 (±30.2) minutes. The mean hemoglobin change after operation was 1.40 (±0.81) g/dL. Mean hospital stay was 3.90 (±1.20) days. The operative complication was trocar site bleeding (2 cases), surgical emphysema (2 cases). In cases, Laparoscopic procedure was converted to laparotomic method. Conclusion : Indication of operation was extended in almost all age (including reproductive age) and 93 Laparoscopic myomectomy was done safely and effectively without severe complications. However, to obtain more safety and usefulness of laparoscopic myomectomy, adequate laparoscopic instrument and expertized operative technic should be demanded. In near future, laparoscopic myomectomy will be more popular and effective by variable technical development and ordered discipline.
이장용(Jang Yong Lee) 대한기계학회 2021 大韓機械學會論文集A Vol.45 No.11
국내 제설작업에서 보편적으로 사용되는 방법은 눈을 차량에 장착된 제설삽날에 의해 도로밖으로 밀어내거나 제설용 블로워를 이용해 일정 거리 밖으로 비산시키는 것이다. 눈을 녹이는 방법은 많은 시간과 에너지가 소요되며 제설되는 양도 많지 않다. 그러나 치워진 눈을 적재하는 장소가 부족하고 제설장비 진입으로 교통체증이 유발되는 도시 중심부와 도로의 램프나 터널의 출입구 같은 블랙아이스 상습발생지역에서는 용해에 의한 제설이 효과적이다. 본 논문은 용해방식 제설장비의 개발과정에 대해 기술하였다. 개발된 장비는 독자적인 이동이 가능하도록 트럭과 함께 구성되었으며 도로위의 눈을 블로워에 의해 트럭 뒷부분의 용해시스템으로 운반하여 눈을 녹이고 용해된 물은 현장에서 배출하게 된다. 개발장비는 제설용량이 시간당 30톤이며 성능시험을 위해 분쇄얼음을 용해수조에 투입하여 용해과정의 시간과 온도에 기반하여 소요된 열량을 계산하였다. 이 과정에서 눈의 수분함량을 나타내기 위한 척도로서 ‘고체비율’ 지수를 도입하였다. Melting snow requires more energy and time than other snow clearing methods such as blowing or shoveling. In some circumstance though, it is necessary to melt snow into water and discharge it at the spot because of narrow space for piling and transporting snow in urban area. This paper describes the development of snow eraser that is composed of a snow melting and transfer system, which can be assembled on a moving vehicle. Snow on the road is moved to a water tank by the snow transfer system, where snow is melted using hot air from the burner located vertically to the tank. The machine has the capacity to erase 30 ton of snow per hour. Experiment was conducted using crushed ice, and calories required for melting ice and heating water was calculated to determine whether the design goal was accomplished. Solid ratio coefficients have been introduced to to describe the percentage of water weight in snow.
이장용(Jang Yong Lee),홍선웅(Sun Woong Hong),박애별(Ae Byul Park),강용필(Yong Pil Kang),기광수(Kwang Soo Kee),임헌정(Hun Jung Im),김경수(Kyung Soo Kim) 대한산부인과학회 2001 Obstetrics & Gynecology Science Vol.44 No.8
Actinomycosis is a rare disease in human and has variable clinical features, which make the diagnosis difficult. Actinomycosis may be confused with malignancy and other inflammatory diseases because of its infiltrative nature and its tendency to invade normal anatomic barriers. We have experienced a case of abdominal actinomycosis combined with ovarian mucinous cystadenocarcinoma and report this case with brief review of literatures.
이장용(Jang Yong Lee) (사)한국CDE학회 2022 한국CDE학회 논문집 Vol.27 No.2
Automobile horn system makes sound by vibration of an assembly in the system. The sound quality of the horn system is dominated by distance between two assemblies, which is named air gap. The two- vibration and body- assembly are made by processes of caulking and riveting respectively. In curling process, the two assemblies are put together to make a complete horn system before it undergo aging process in order to adapt to temperature changes. Horn system designer should consider the deformation of parts during the assembly processes which greatly affect the final air gap value. This paper investigate the deformation of parts of the horn system by experiment on assembly process. With the deformation data, a new horn system design is made to make more assembly product fit into the range of air gap. Monte carlo simulation is used to predict dimension of parts and deformation, which is proved to be good statistical method in the design of precise product such as horn system.