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김인철(Kim, In-Chul),이주용(Lee, Joo-Yong),이정렬(Lee, Jung-Lyul) 한국해안해양공학회 2011 한국해안해양공학회 논문집 Vol.23 No.1
2009년 8월 13일과 15일, 부산 해운대 해수욕장 앞 해상에서 이안류가 발생하였다. 또한, 올 여름인 2010년 7월 29일과 30일에도 이안류가 발생하여 피서객 들이 조난된 사고가 발생하였다. 해수욕객들은 전원 구조되어 인명 피해는 발생하지 않았지만 최근 이안류 발생이 너무 잦아져 이에 대한 원인파악과 대책마련이 시급한 실정이다. 본 논문에서는 파랑모형과 조류가 결합된 해빈류 모형을 기본으로 튜브거동까지 재현되는 사용자 편의를 위하여 GUI로 개발된 HAECUM 모형(HAEundae CUrrent Model)을 이용, 해운대 해수욕장의 이안류 발생 수치모의를 실시하였다. At Haeundae Beach in Busan, people were swept away by the fast-moving rip current and rescued, on August 13th and 15th, 2009 & July 29th and 30th, 2010. In predicting the wave-induced current and consequent tube movement for public safety, the coastal flows and waves are calculated at each time step and grid point by means of systematic interfacing of hydrodynamic and wave models (Lee, 2001). To provide a user-friendly simulation tool for end-users, the forecasting system has been built in a software package called HAECUM. Outputs from the system are viewed as graphs of tube positions with combined current vectors for easy decision of emergency management officials. The tube-wave interaction is taken into account and the traces of swim tube are simulated by using a Lagrangian random walk (Chorin, 1978; Lee, 1994). In this study, we use the Lee's approach (Lee, 1993) in estimating the surface onshore currents due to wave breaking.
소아 연령군에서의 냉각-산소화-희석-혈심정지액을 이용한 심근 보호에 대한 임상적 고찰
이정렬,김용진,Lee, Jeong-Ryeol,Kim, Yong-Jin 대한흉부심장혈관외과학회 1992 Journal of Chest Surgery (J Chest Surg) Vol.25 No.3
Hypothermic cardioplegia is a well established method to optimize myocardial preservation during ischemic arrest, and it has been demonstrated that oxygenation of crystalloid cardioplegic solutions markedly enhances myocardial protection, The addition of a small amount of red blood cells to a crystalloid cardioplegic solutions improves capillary perfusion. Considering these results, we changed our cardioplegic solution from cold oxygenated crystalloid[Group 2] to cold oxygenated diluted blood[Group 1]. In this investigation, we examined the effects of two hypothermic potassium cardioplegic solutions on myocardial preservation in 50 patients[30 of Group 1 and 20 of Group 2] of child age group. Factors considered preoperatively included age, sex, body weight, preoperative diagnosis, and they showed no statistical differences, Intraoperative factors considered included duration of cardiopulmonary bypass, duration of aortic occlusion, operative mortality, which also revealed no statistically significant differences, We measured the serum levels of GOT[glutamate oxaloacetate transaminase] and CPK [creatine phosphokinase] during the first two days postoperatively, which, in both groups, showed significantly higher values until postoperative 1 day, and decreasing tendancy thereafter, however we failed to find any significant difference between two groups regarding the serum levels of those enzymes each day. Time for extubation and use of inotropics also revealed no significant differences. Defibrillation was needed less in Group 1 than in Group 2[p<0.05], and one case of supraventricular tachyarrhythmia occured in Group l. We conclude that cold oxygenated diluted blood cardioplegia provides no less preservation than does an oxygenated crystalloid cardioplegic solution in child age group.
성인에서 선천성 심장기형의 수술성적 -725 치험례 보고-
이정렬,서경필,Lee, Jeong-Ryeol,Seo, Gyeong-Pil 대한흉부심장혈관외과학회 1986 Journal of Chest Surgery (J Chest Surg) Vol.19 No.1
Patients over 15 years of age who have undergone a surgical correction of a congenital cardiac malformation during period of January 1958 through January 1986 have been reviewed. During this period there were 3957 congenital cardiac lesions consisting of 2712 acyanotic and 1245 cyanotic cases. Among them, a total of 725 adults [18.3%] with a variety of congenital heart lesions, 548 acyanotic group and 177 cyanotic group were operated on. 372 patients were male and 252 patients were female. There were 280 patients under 20 years of age, 206 between 20-24 years, 102 between 25-29 years, 48 between 30-34 and 89 over 35 years. The most common defects were atrial septal defect which accounted for 207 cases [28.6%] and other common anomalies were VSD [140 cases, 19.3%], TOF [136 cases, 18.6%], PDA [120 cases, 16.6%] and PS [33 cases, 4.6%] in order of incidence. Overall operative mortality for this series was 3.6% [1.8% of a cyanotic group and 9.0% of cyanotic group] compared with 2.8% of total cases of congenital heart disease [acyanotic group 1.1% and cyanotic group 6.5%]. This reviewed series reveals the incidence of operable congenital heart defects appearing in any adult life and demonstrates that surgical repair can be accomplished with a satisfactory low mortality rate.