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( Woong Sun Yoo ),( Won Hyeong Park ),( Seo Young Yang ),( Do Young Kim ),( Soo Hyun Yang ),( Sung Hoon Kim ),( Jei So Bang ),( Jisun Jang ),( Tae Gyun Kim ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1
Background: One of the previous drawback of full covered metal stents on the peripancreatic cancer is the risk of failure of biliary drainge from cystic duct. Therefore, cholecystitis occurs frequently by complication. We devise some special self expanded metal stent (SEMSs) which were combining the advantages of previous covered stent. Methods: We enrolled fi ve patients (mean age 69.2 years) who underwent endoscopic retrograde biliary drainage with newly designed two third polytetrafl uoroethylene (PTFE) partially covered SEMs for palliation of biliary obstruction secondary to unresectable peripancreatic cancer at our institutions from August 2013 to February 2014. The de nove partially covered SEMs (Taewoong Corporation, Seoul, Korea) is made with stent consists of an inner polyurethane layer to prevent tumor ingrowth and an outer uncovered nitinol wire tube to allow the mesh of the stent to embed itself in the biliary duct wall. Differently then traditional covered stent, One-third of stent is not covered. Follow-up data focused on clinical remissions and complication especially cholecystitis. Additory complications included stent migration, bleeding, perforation and 30-day mortality. Results: In total, 5 stents were placed successfully in 5 of 5 patients. All patients (5/5) did not need to repeat procedures. One hundred percent of the patients experienced adequate palliative drainage for the remainder of their lives. No patients experienced delayed stent migration with stone formation. The 30-day mortality rate was 0% Conclusions: The de nove two third PTFE-covered nitinol stent seems to be safe to use with acceptable complication rates. The PTFE-covered lay is located on the halfway and only covered two third. The rest uncovered one third of stent play an important role in biliary drainage. But there is a need for further large studies to determine the patency.
( Seo Young Yang ),( Sung Hoon Kim ),( Woong Sun Yoo ),( Do Young Kim ),( Won Hyeong Park ),( Tae Gyun Kim ),( Jisun Jang ),( Jei So Bang ),( Soo Hyun Yang ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1
Background: Endoscopic submucosal dissection (ESD) is one of the therapeutic modalities for early gastric cancer. After the ESD, synchronous or metachronous lesions occur in some cases. Agent Orange (AO) is an herbicide used in the Vietnam War to defoliate forest areas. Many Korean veterans who participated in the war were exposed to it. But the infl uence of the material to stomach cancer remained uncertain. So, we investigate the infl uence of AO to the synchronous or metachronous gastric cancer in patients treated by ESD. Methods: From January 2008 to December 2012, 87 male early gastric cancer patients, including 38 AO exposure veterans, treated by ESD and followed up more than 12 months were enrolled, retrospectively. All patients were checked by gastrofi berscope and CT scan regularly for recurrence. Synchronous and metachronous lesion were defi ned as a new lesion found within 1 year and a new lesion found after 1 year of primary ESD treatment. We analyzed the relationship between the synchronous and metachronous lesion occurrence and the clinical characteristics including AO exposure. Results: The median age was 70 (52-85) and the medial follow-up duration was 25 months (12-63). Overall, synchronous lesion incidence rate was 4.6% (4 cases) and metachronous lesion incidence rate was 11.5% (10 cases). In analysis, the metachronous lesion incidence rate was higher in old age group (=65), statistically (0% vs. 14.5%, p <0.05). Otherwise, there was no relationship between the synchronous or metachronous gastric cancer occurrence and other clinical characteristics such as AO exposure, the tumor size, location, histologic and tumor type. Conclusions: Old age is suggested as a risk factor of the metachronous early gastric cancer. It is suggested that there was no infl uence of AO exposure to the synchronous and metachronous gastric cancer.
저압 케이블 고장 위치 검출 실증 시험장 설계 및 구축
오훈(Hun Oh),김준성(Jun-Seong Kim),이제훈(Jei-Hoon Lee),김도웅(Do-Woong Kim),전정채(Jeong-Chay Jeon),김택희(Taek-Hee Kim),유재근(Jae-Geun Yoo) 한국산학기술학회 2015 한국산학기술학회 학술대회 Vol.2015 No.1
케이블의 유지관리와 고장시 피해비용 감소, 신속한 복구 등을 위해 고장 위치 검출에 대한 기술개발과 장비 운영 능력 배양이 필요하다. 따라서, 현장 조건에 맞는 기술의 개발과 시험, 장비 운영 능력 향상, 그리고 장비의 성능 검증 등을 위해 표준화된 실증 시험장이 필요하다. 본 논문에서는 저압 케이블 고장 위치 검출 실증 시험장의 설계 및 구축에 대해 서술하였다. 구축된 실증시험장은 단선, 합선, 반단선, 접촉불량 고장을 매설된 케이블의 100m 200m 거리에서 발생시켰고 최대 거리 측정 시험을 위해 1km 케이블을 설치하였다. 이러한 실증시험장은 향후 고장 검출 기술의 개발과 표준화, 그리고 장비 운영능력의 배양, 성능 검증 및 인증 시험 등을 위해 활용될 수 있을 것이다.