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( Shang Hoon Han ),( So Hee Yun ),( Jae Un Lee ),( Moon Sik Park ),( Wang Guk Oh ),( Young Jae Lee ),( Gum Mo Jung ),( Ji Woong Kim ),( Yong Keun Cho ),( Jin Woong Cho ),( Seol Bong Yoo ),( Myoung Jin 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1
Background: We decide whether to perform endoscopic submucosal dissection (ESD) or gastrectomy for early gastric cancer (EGC) by endoscopic examination. We cannot estimate the correct tumor size with naked eye during upper endoscopic examination. And endoscopic size of gastric tumor is different from histologic size of it. The goal of this prospective study is to compare macroscopic and pathologic diameters of gastric tumors resected by ESD. Methods: We prospectively enrolled gastric adenomas and adenocarcinomas and performed ESD for the tumors from July 2013 to November 2013. The tumor diameter was measured macroscopically by the same investigator with a hand ruler just after removal. Thereafter, it was measured pathologically by the same pathologist on mapping charts after processing specimen. Results: We included 50 gastric tumors (gastric adenomas were 39 and gastric adenocarcinomas were 11). In all tumors, mean of the macroscopic diameter (20.44 ± 8.28 mm) was signifi cantly larger than mean of the pathologic diameter (14.92 ± 8.33 mm, p < 0.001). But, in adenocarcinoma group, there was not signifi cant difference between mean of two diameters (19.80 ± 6.41 mm, 16.80 ± 5.73 mm, p > 0.05). The lesions of adenocarcinoma in adenoma were signifi cant difference (n=5, 19.80 ± 6.41 mm, 16.80 ± 5.73 mm, p < 0.05). Conclusions: In adenocarcinoma, tumor size was not decreased significantly after formalin fixation and slicing. But, the lesions of adenocarcinoma in adenoma was decreased signifi cantly. This study showed that ESD may be performed for adenocarcinoma in adenoma that crosses absolute indication of ESD for tumor size.
트윈 리프트용 신축 스프레다 유니트의 구조해석에 관한 연구
이상훈(Sang-Hoon Lee),정일중(Il-Jung Jeong),김동은(Dong-Eun Kim),이석순(Seok-Soon Lee),신상운(Shang-Woon Shin),한국남(Goog-Nam Han),김민규(Min-gyu Kim) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
This Study is a structure analysis about twin lift telescopic Spreader that usually loading and unloading a container in harbor. Applied load is assumed by lifting 65tons that is the maximum weight of real container. The finite element analysis for 3D model is performed by ABAQUS/Standard. We made an estimate of safety by evaluating the results of the finite clement analysis.
( Mi Young Jang ),( Jin Woong Cho ),( Wang Guk Oh ),( Sung Jun Ko ),( Shang Hoon Han ),( Hoon Ki Baek ),( Young Jae Lee ),( Ji Woong Kim ),( Yong Keun Cho ),( Gum Mo Jung ) 대한장연구학회 2013 Intestinal Research Vol.11 No.3
Endoscopic submucosal dissection has been a useful treatment of selected colorectal neoplasia cases. The incidence of perforation related to colorectal endoscopic submucosal dissection is 5-20%. However, while there have been numerous reports regarding retroperitoneal, mediastinal, pleural and subcutaneous emphysema after therapeutic colonoscopy, pneumoscrotum is a relatively rare manifestation of perforation associated with colorectal endoscopic submucosal dissection. In particular, pneumorrhachis, or air within the spinal cord, following therapeutic colonoscopy, is extremely rare. Herein, we report a conservatively treated perforation case as having pneumorrhachis, penumoscrotum, and pneumoperitoneum after colorectal endoscopic submucosal dissection. (Intest Res 2013;11:208-212)
( Moon Sik Park ),( Jae Un Lee ),( So Hee Yun ),( Shang Hoon Han ),( Wang Guk Oh ),( Young Jae Lee ),( Gum Mo Jung ),( Yong Keun Cho ),( Jin Woong Cho ),( Ji Woong Kim ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1
Background: There are few data that compare among the three widely used bowel preparations: conventional 4L polyethylene glycol (4L PEG); sodium picosulfate and magnesium citrate(SPMC); and low-volume PEG plus Ascorbic acid(2L PEG+Asc). The aim of this study is to compare among the three bowel preparations in the efficacy, tolerability, and safety. Methods: 126 patients undergoing outpatient elective colonoscopy were randomly assigned to one of the three bowel preparations by computerized randomization in a single blinded prospective study. The three bowel preparations were as follows: Group A(n=43), 4L PEG solution; Group B(n=40), 3 sachets of SPMC as a split dose; or Group C(n=43), 2L PEG+Asc as a split dose. All colonoscopy images were recorded into computed video files. One Endoscopist blinded to the type of preparation gave a bowel cleansing score using recorded video fi les according to the Aronchick bowel preparation scale and Boston bowel preparation scale. And tolerability and safety were evaluated by a questionnaire immediately before the procedure. Results: Data analysis showed that efficacy by Aronchick bowel preparation scale and Boston bowel preparation scale was not different significantly among three groups. There were no significant differences among the three groups in tolerability such as overall satisfaction by visual analogue score, consumed volume, willingness to repeat the same preparation. But, taste in SPMC group was significantly better than that in other two groups(p<0.001). The factors associated with safety such as abdominal distension, nausea, vomiting, general weakness were not significantly different among the three groups. Conclusions: There were no significant differences among three bowel preparations in colon cleansing efficacy. But, taste in SPMC group was significantly better than that in other two groups.
( Mi Young Jang ),( Jin Woong Cho ),( Wang Guk Oh ),( Sung Jun Ko ),( Shang Hoon Han ),( Hoon Ki Baek ),( Young Jae Lee ),( Ji Woong Kim ),( Gum Mo Jung ),( Yong Keun Cho ) 대한내과학회 2013 The Korean Journal of Internal Medicine Vol.28 No.6
Background/Aims: Endoscopic submucosal dissection (ESD) has become accepted as a minimally invasive treatment for gastric neoplasms. However, the development of synchronous or metachronous gastric lesions after endoscopic resection has become a major problem. We investigated the characteristics of multiple gastric neoplasms in patients with early gastric cancer (EGC) or gastric adenoma after ESD. Methods: In total, 512 patients with EGC or gastric adenoma who had undergone ESD between January 2008 and December 2011 participated in this study. The incidence of and factors associated with synchronous and metachronous gastric tumors were investigated in this retrospective study. Results: In total, 66 patients (12.9%) had synchronous lesions, and 13 patients (2.5%) had metachronous lesions. Older (> 65 years) subjects had an increased risk of multiple gastric neoplasms (p = 0.012). About two-thirds of the multiple lesions were similar in macroscopic and histological type to the primary lesions. The median interval from the initial lesions to the diagnosis of metachronous lesions was 31 months. The annual incidence rate of metachronous lesions was approximately 3%. Conclusions: We recommend careful follow-up in patients of advanced age (> 65 years) after initial ESD because multiple lesions could be detected in the remnant stomach. Annual surveillance might aid in the detection of metachronous lesions. Large-scale, multicenter, and longer prospective studies of appropriate surveillance programs are needed.
도시철도 잉여 회생에너지 재활용을 위환 회생용 인버터의 현장 적용 시험 및 고찰
김주락(Joorak Kim),장동욱(Dong-Uk Jang),한문섭(Moonseob Han),창상훈(Shang-Hoon Chang) 대한전기학회 2009 정보 및 제어 심포지엄 논문집 Vol.2009 No.10
DC transit system has been adopted in the metropolitan area, Korea since 1974. EMU in this system always reiterates that acceleration and retardation. When EMU decelerates using electric breaking, regenerative power occurs. Regenerative power can be consumed in vicinity EMU on the same line or in resistor. If DC transit system has inverter for reusing regenerative power, Energy efficiency in DC transit system will be increased. This paper present a scheme to set up the starting voltage for the developed inverter and its field test result.
( So Hee Yun ),( Jin Woong Cho ),( Yong Keun Cho ),( Ji Woong Kim ),( Young Jae Lee ),( Shang Hoon Han ),( Jae Un Lee ),( Moon Sik Park ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1
Background: The histological diagnosis and the direction of treatment of gastric subepithelial tumors(SETs) cannot be only determined based on those endoscopic fi nding and a standard endoscopic forceps biopsy. Thus, endoscopic submucosal dissection( ESD) can be a useful method for treatment as well as diagnosis of SETs. Therefore, the aims of this study is to investigate the effi cacy and safety of ESD for gastric SETs, especially originating from the muscularis propria layer Methods: From January 2004 to September 2013, 73 patients with gastric SETs were treated with ESD were enrolled. The endosonographic reports, pathology and the patients` medical records were reviewd retrospectively. Results: The mean age of the patients was 54.4± 11.9 years. The mean tumor diameter was 16.1 ± 7.7 mm. The histologic types of muscularis propria origin were consisted of GI stromal tumor 13(46%), leiomyoma 5(17.9%), ectopic pancreas 4(14.3%), schwannoma 1(3.6%) and others. The rate of complete resection of mscularis propria origin was 50 percent. The overall complication rate was 12.3%(9/73), composed of bleeding and perforation were seen in 2 and 7 of patients respectively, but, all patients were treated conservatively without operation. The incomplete resection and complication rate were statistically higher in SETs of mscularis propria origin than in SETs within submucosa. The analysis of factors associated with the complication incidence showed that the procedure time was only signifi cant factor.(p=.030) The recurrence rate was 4.1%(3/73) without mortality during follow-up periods, and all of recurrence cases were local recurrence. Conclusions: This study shows that ESD for gastric SETs including origin from the muscularis propria can be effective and safe modality for treatment as well as diagnosis.