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안용익(Yong-Ik Ahn),오석문(Suk-Mun Oh),이경철(Kyung-Chul Lee),김경민(Kyung-Min Kim),장윤호(Yoon-Ho Jang) 한국철도학회 2015 한국철도학회 학술발표대회논문집 Vol.2015 No.10
이 논문은 현재 국내에 명확하게 제시되어 있지 않은 고속철도 도중 건넘선의 적정 설치간격을 검토한다. 이 논문에서 제시하는 도중 건넘선의 적정 설치간격은 설치에 따른 비용 및 유지보수비와 이를 이용하는 고속열차 및 유지보수차량의 편익을 비교하는 방법으로 구성된다. 도중 건넘선의 설치비용은 호남고속철도 도중 건넘선 설치비용을 참고로 하였다. 도중 건넘선을 설치함으로써 발생할 수 있는 편익으로는 유지보수차량의 연료비 및 인건비 절감편익과 고속열차 차량의 추가 운영을 통한 승객 수송인원을 자동차를 이용하였을 경우와 비교하여 산정하였다. 마지막으로 도중 건넘선 설치에 따른 공사비 및 유지보수비와 편익을 비교하여 B/C 1.0 이상이 되는 최소 설치간격을 검토하였다. This paper examines the proper spacing can be applied line crossing during high-speed railroad. Proper spacing of the line crossing presented in this paper is configurations to compare that the cost of installation a line crossing and the benefit of using a line crossing by high-speed rail vehicles and maintenance vehicles. Cost of installation a line crossing was referenced Honam high-speed railway. Benefits were estimated to reduce fuel costs and labor costs of maintenance vehicle and passenger’s destination arrival time between high-speed train and car. Compare to costs and benefits, than examined a minimum spacing to installation line crossing that is more than B/C 1.0.
식도정맥류 출혈의 경화요법의 대치치료로써 내시경적 정맥류 결찰요법
김경재,이지현,안기성,손호상,배정동,강민모,최석문 대한소화기내시경학회 1994 Clinical Endoscopy Vol.14 No.1
Currently, endoscopic injection sclerotherapy(EIS) is the mast widely used method for treating and eradicating acutely bleeding esophageal vari4~es in repeated sessions, but may be assaciated with some undesirable local and systemic cornplicatians. Endoscopic variceal ligation (EVL), a newly developed method to manage esophageal variceal bleeding alternating EIS, induces mechanical ligation and strangulation of varices by using elastic $quot;O$quot; rings. This study assessed initial control rate of active variceal bleeding, ineidence of rebleeding, changes in grade of varices, survival rate, and complications associated with EVL. Over a 15 months period, EVL was performed on 30 consecutive patients who had visited Taegu Catholic University Hospital by recent esophaigeal variceal bleeding or by actively bleeding varices. Total of 316 varix ligations were performed during 85 separated EVL sessions. Active bleeding varices were initially controlled in all seven(100%)patients. There were a 30% incidence of recurrent bleeding. By a mean of 3.4 times of EVL sessions, variceal eradication or reduction of size to grade I was achieved in thirteen patients. No major complications (perforation, stricture, deep ulceration) were noted and there were no treatment failures or exacerbations. Seven(23%) patients died, two from hepatic failure, one from rebleeding with refusal for repeated ligation, one from hepatic coma, two from hepatorenal syndrome, one from other cause(pancreatic cancer). These results suggest that EVL can be used effectively to control active variceal bleeding, prevent rebleeding and eradicate varices with repeated ligations. We conclude that EVL is a safe and effective alternative treatment to sclerotherapy for esophageal varices.
비식도정맥류 상부위장관 출혈에서 Hypertonic Saline Epinephring 용액의 치료요법 : 지혈성적 및 시간대별 진단율과 지혈율 비교
김경재,이지현,안기성,손호상,배정동,강민모,최석문 대한소화기내시경학회 1994 Clinical Endoscopy Vol.14 No.1
A prospective randomised trial was performed to assess the diagnostic accuracy according to the time interval and the efficacy of endoscopic injection of hypertonic saline-epinephrine(HS- E)solution, consisting of 3.5% sodium chloride with 0.0045% epinephrine, for actively bleeding peptic ulcers, exposed vessel or blood clot on ulcer bed, or Mallory-Weiss tear. Over 24 month, emergency endoscopy in 180 patients admitted for upper gastrointestinal hemorrhage identified 51 patients with nonvariceal hemorrhage. The causes of bleeding were; gastric ulcer in 32; duodenal ulcer in 13; gastric cancer in 4; Mallory-Weiss tear in 2. With this method, the hemostatic effect was permanent in 40 cases(84.3%), temporary in 9 cases(11.8%), and failed in 2 cases(3.9%). By applying this method, the rate of emergency operation for patients with bleeding from the upper gastrointestinal tract was significantly reduced from 20.0% (8/40)to 3.9%(2/51)(p$lt;0.05). Emergency endoscopy in acute UGI bleeding increases the accuracy of detection of actual bleeding sites(p$lt;0.05), but if the endoscopic procedure was performed within 48 hours, the hemostatic rate was not affected(p$lt;0.05). We concluded that hypertonic saline-epinephrine injection method could provide a simple maneuver with reasonable cost, high safety, and satisfactory hemostatic efficacy in the treatment of nonvariceal upper gastrointestinal bleeding.