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권기정(Kwon Gi-Jung),이기승(Lee Gi Seung),고영윤(Ko young yun) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-
A subway is one of many public transportation means that contributes toward our society including seoul and offering of its service and expression of various information are in need due to users high demand. And there are various class of users. For that reason an optical communication network in the general contorl center and station buildings was installed. Considering the importance of safe operation of subway, optical communication exists to enhance customer satisfaction. Safe operation is essential as its level of reliance accounts for about 95%. this paper will look for ways to promote mutual information interchange and operation know-how with systems of the same kind and sharing a capable of effective operation of systems in place. Optical communication network in the metropolis railroad accepts various kinds of control networks and data networks for train operation. As occasion demands, this paper presents effective application scheme and specialized organization about an optical communication operating system.
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식도정맥류 출혈에서 Histoacryl의 치료효과; 식도정맥류 결찰요법과의 비교
김영수,조성원,김호동,이광재,김진홍,유병무,함기백,고영윤,고준호,이규현,신용준 대한간학회 1999 Clinical and Molecular Hepatology(대한간학회지) Vol.5 No.4
Background/Aim: Endoscopic sclerotherapy and band ligation have been well documented beneficial therapeutic options of esophageal variceal bleeding. But acute variceal bleeding is refractory to sclerotherapy in upto one-third of patients, and rebleeding occurs in 30% to 50%. Recently alternative endoscopic modality, N-butyl-2-cyanoacrylate (Histoacryl) injection is performed in intravariceal sclerotherapy but its efficacy and safty are not clearly established. We evaluated the efficacy of Histoacryl on esophageal variceal bleeding and compared with that of endoscopic band ligation in the present study. Materials/Methods: From March 1994 to March 1998, ninety seven patients with endoscopically documented esophageal variceal bleeding were enrolled. Histoacryl injection (Histoacryl group, n=33) or endoscopic band ligation (EVL group, n=64) was done for esophageal variceal bleeding. We evaluated the rebleeding rate and in-hospital mortality in both groups. Results: Baseline characteristics were similar but active bleeding on first endoscopic session was significantly higher in Histoacryl group (Histoacryl group; 90.7%, EVL group; 26.6%, p=0.002). Successful hemostasis was done at 87.9% in Histoacryl group, 95.3% in EVL group (not significant). There were no significant differences on early rebleeding rate (18.2% vs 23.4%), late rebleeding rate (39.4% vs 37.5%) and in-hospital mortality (24.2% vs 15.6%) between Histoacryl group and EVL group. There were no technique-related fatal complications at Histoacryl injection group. Conclusion: Therapeutic efficacy of Histoacryl injection was similar to the endoscopic band ligation in patients with esophageal varix bleeding in terms of hemostasis and rebleeding. Histoacryl is effective therapeutic option for esophageal variceal bleeding as well as gastric variceal bleeding. (Korean J Hepatol 1999;5:306-313)
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식도정맥류의 조기 재출혈 예방에 결찰요법과 Octreotide의 병용치료와 결찰요법 단독치료의 효과비교
조성원,김호동,이광재,김진홍,함기백,김헌종,고광현,고영윤,고준호,이규현 대한간학회 1999 Clinical and Molecular Hepatology(대한간학회지) Vol.5 No.4
Background/Aims: Endoscopic variceal ligation (EVL) has been effective modality for esophageal variceal bleeding, but recurrent bleeding occurs 20 to 40% of patients. So there has been an increased interest in the use of vasoactive drugs to lower portal hypertension and help control variceal bleeding before and after endoscopy. We investigated the efficacy of octreotide (OCT) infusion as an adjunct to EVL for preventing early rebleeding from varices. Methods: From Jan. 1997 to Feb. 1999, fifty four patients with endoscopically documented esophageal variceal bleeding were included. The patients were randomly treated by EVL alone (EVL group, n=30) or EVL plus octreotide (EVL+OCT group, n=24). We evaluated the 5-day and 6-week rebleeding rate and 6-week mortality. Results: Baseline characteristics were similar in two group but hospital stay (p=0.028) and units of transfused blood (p=0.043) were significantly less in EVL+OCT group. There were no significant differences on 5-day rebleeding rate (EVL group; 7%, EVL+OCT group; 0%) and 6-week rebleeding rate (EVL group; 20%, EVL+OCT group; 4%). Conclusions: The combined therapy did not decrease early rebleeding and mortality, but it was superior to EVL alone in hospital course such as requirement of transfusion and duration of hospitalization. (Korean J Hepatol 1999;5:299-305)
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