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윤영준(Young-Joon Yun),한상무(Sang-Mu Han),이진우(Chin-Woo Yi) 한국조명·전기설비학회 2004 한국조명·전기설비학회 학술대회논문집 Vol.2004 No.11월
본 연구에서는 펄스 스타트 램프를 제작하여 전기적 특성과 광학적 특성을 측정하였다. 제작한 램프의 전력은 150, 200, 350 W이다. 본 논문에서는 PSL에 대한 일반적인 특성과 제작한 램프의 장점에 대하여 살펴보고자 한다.
경정맥 간내문맥 - 간정맥 단락술로 십이지장정맥류 대량 출혈을 성공적으로 치료한 1 예
윤영준(Young Joon Yoon),한광협(Kwang Hyub Hahn),이도연(So Yun Lee),백용한(Yong Han Paik),정재연(Jae Yeon Chung),김철(Chul Kim),전재윤(Chae Yoon Chon),문영명(Young Myoung Moon) 대한소화기학회 2001 대한소화기학회지 Vol.38 No.4
Duodenal varices can be resulted from either liver cirrhosis or extrahepatic portal hypertension. Bleeding from duodenal varices is rare but often severe and life threatening. Bleeding of duodenal varices can be treated with non-surgical or surgical treatment. Non-surgical treatments include endoscopic variceal ligation, endoscopic sclerotherapy, and transjugular intrahepatic portosystemic shunt (TIPS). Surgical treatments include shunt surgery, variceal ligation, variceal resection, and duodenectomy. However, endoscopic treatments are not so effective and surgical interventions have many limitations. A 68-year-old man with liver cirrhosis was admitted to our department and presented with mental change and melena. He received a large amount of transfusion and it was not possible to perform gastrointestinal endoscopy. Emergency angiography revealed marked dilatation of mesenteric veins, which was treated by TIPS. After TIPS, transfusion requirement was markedly reduced and gastrointestinal endoscopy demonstrated duodenal varices without bleeding. We conclude that TIPS may be an effective therapeutic option for control of hemorrhage from duodenal varices. (Korean J Gastroenterol 2001;38:292-295)
김황호(Hwang-Ho Kim),윤영준(Young-Joon Yun),한상무(Sang-Mu Han),이진우(Chin-Woo Yi) 한국조명·전기설비학회 2004 한국조명·전기설비학회 학술대회논문집 Vol.2004 No.11월
본 연구에서는 Green, Blue, Pink, Orange 컬러 메탈핼라이드 램프를 제작하여 전기적 특성과 색좌표와 스펙트럼 분포 등의 광학적 특성을 측정하였다. 연구 램프는 Double Ended type(MH-DE)과 Single Ended type(MH-SE)이며, 램프전력은 70W~1,000W이다. 본 논문에서는 대표적인 램프에 대한 결과를 소개하고자 한다.
사지수술을 위한 구혈대 적용이 호중구의 Hydrogen Peroxide 생성에 미치는 영향
김영미,이승준,윤영준,길호영,이기병,최현,전진우,박찬정 대한마취과학회 1995 Korean Journal of Anesthesiology Vol.29 No.1
The use of lower extremity tourniquets for procedures of the lower leg is considered routine in orthopedic surgery, yet, lower extremity tourniquets are not benign. While the tourniquet is inflated, metabolic changes such as increased PaCO_2, lactic acid, and serum potassium and decreased le?? of PaO_2 and pH occur in the ischemic limb. Deflation of tourniquet results in release of anaerobic metabolic products during ischemia into systemic circulation. In this ischemia/reperfusion situation, oxygen free radicals could potentially be produced during the reperfusion period by several mechanisms. One of these mechanisms is release of intracellular superoxide or hydrogen peroxide by activated neutrophils in the area. These reactive oxygen species(ROS) could be a causative factor for the postreperfusion no-flow, lung injury, induction of tourniquet shock, etc. The purpose of this clinical study was to investigate the effect of tourniquet deflation on the hemodynamic changes, changes of blood gas analysis, and hydrogen peroxide production using flow cytometric analysis of fluorescent DCF(Dichlorofluorescein). Quantitative Analysis of fluorescent DCF was performed in resting and fMLP(N-formyl-methyonyl-leucyl-phenylalanine) or PMA(phorbol myristate acetate) stimuliated neutrophils. The results were as follows: 1) The hemodynamic changes (systolic and diastolic BP, pulse rate) did not show any significant difference before and after tourniquet release(P>0.05). 2) Arterial pH deceased significantly until 10min and PaCO_2 was increased significantly until 5min after tourniquet release(P<0.05). 3) Arterial PO_2, bicarbonate, base excess showed no significant change before and after tourniquet release(P>0.05). 4) Hydrogen peroxide production which was estimated by fluorescent DCF in neutrophils did not show any significant change before and after tourniquet release(P>0.05). These results indicate that tourniquet application(400mmHg, less than 2hours) could not release significant hydrogen peroxide during reperfusion period after tourniquet release. (Korean J Anesthesiol 1995; 29: 94~100)