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최종익(Jong Ik Choi),김용훈(Yong Hoon Kim),최영일(Young Il Choi),강구정(Koo Jeong Kang),임태진(Tae Jin Lim) 한국간담췌외과학회 2008 한국간담췌외과학회지 Vol.12 No.2
Introduction and Aim: Acute pancreatitis is an inflammatory process of varying severity, ranging from a mild, self-limiting form to severe acute pancreatitis, which leads to complications such as necrosis, pseudocyst formation, and organ failure. This highly lethal condition should be differentiated from acute abdomen caused by other diseases as early as possible so appropriate management can be carried out. Patients and Methods: A survey was carried out to determine the current status of management for this particular disease in Korea. A total of 269 patients were collected from 13 university hospitals during a four and a half year period (January 2000 to June 2004). Results: Of the 269 patients, 103 (38.3%) were managed with surgery, and 166 (61.7%) were managed with conservative treatment. The most commonly performed surgical procedure was debridement of necrotic tissue with closed drainage. The most common etiology was alcohol, with 143 cases (53.4%), followed by gallstones, with 48 cases (17.9%). E. coli was the most commonly cultured bacterium. The mortality rate in surgically managed patients was 9.7%. The mortality rate in conservatively treated patients was 7.2% . Conclusion: Patients with infected pancreatic necrosis should be managed with surgical necrosectomy and drainage. However, patients with sterile necrosis should be managed conservatively unless organ complications or severe clinical deterioration develops despite intensive therapy. Patient survival is improved through early diagnosis, followed by adequate drainage in combination with intensive care.
췌-십이지장절제술에 있어서 췌-공장문합방법에 따른 합병증 비교
박정훈(Jung Hun Park),최영일(Young Il Choi),김용훈(Yong Hoon Kim),강구정(Koo Jeong Kang),임태진(Tae Jin Lim) 한국간담췌외과학회 2009 한국간담췌외과학회지 Vol.13 No.1
Purpose: This study was designed to compare and analyze the complication rates of different anastomotic methods of pancreaticojejunostomy after performing pancreaticoduodenectomies by a single surgeon. Methods: From January 2000 to August 2007, 92 patients underwent pancreaticoduodenectomy at a single institution. According to the texture of the pancreas and pancreatic duct size (below or above 3 mm), the type of pancreaticojejunal anastomosis was selected (either duct-to-mucosa pancreaticojejunostomy or end-to-side pancreaticojejunostomy with polyethylene tube). Results: The pathologic diagnosis of the 92 patients included 81 patients with adenocarcinoma, five with chronic pancreatitis and three with GIST that developed in the duodenum. The adenocarcinomas include 33 distal CBD cancers, 18 pancreatic head cancers, 27 Ampulla of Vater cancers and 6 duodenal cancers. The pancreatic fistula rate was not significantly different between the duct-to-mucosa group and the end-to-side pancreaticojejunostomy group (nine of the 43 patients in the duct-to-mucosa group (20.9%) and six of the 46 patients in the tube insertion group (13.0%) (p=0.4). The rate of pancreatic fistula, as classified by three different consecutive periods (period I: 2000-2003; period II: 2004-2005; period III: 2006-2007), was markedly decreased and there were less complications with increasing experience (period I: 33.3%; II: 7.1%; III: 6.4%) (p=0.001). Conclusion: When performing pancreaticojejunostomy, both the duct-to-mucosa method and the tube insertion method were effective in decreasing the complication rate if the appropriate method was selected according to the texture of the pancreas and the size of pancreatic duct. The surgeon"s experience and skill can affect the occurrence of pancreatic fistula after pancreaticojejunostomy. Enough experience is the most important factor to decrease the complication rate after pancreaticoduodenectomy.
방사선원과 감마카메라 사이에 위치한 산란매질이 소형 감마카메라 영상에 미치는 영향 연구
서현관,최용,임기천,우상근,이준수,송태용,최연성,이경한,김병태,최영일,Seo, Hyun-Kwan,Choi, Yong,Im, Ki-Chun,Woo, Sang-Geun,Lee, Jun-Soo,Song, Tae-Yong,Choi, Yeon-Sung,Lee, Kyung-Han,Kim, Byung-Tae,Choi, Young-Il 한국의학물리학회 2002 의학물리 Vol.13 No.1
방사선원과 감마카메라 사이에 위치한 산란매질의 종류, 두께 그리고 조준기 종류가 감마카메라 영상에 미치는 영향을 고찰하기 위하여 실험과 시뮬레이션을 수행하였다. 감마카메라는 조준기, NaI(T1) 섬광결정(60$\times$60$\times$6 ㎣), 위치민감형 광전자증배관(PSPMT), NIMs, 제어용 컴퓨터를 사용하여 개발하였다. 시뮬레이션은 산란매질(아크릴매질/공기)의 두께 변화(0~8 cm)와 조준기의 종류(평행구멍형조준기/확산형조준기) 변화에 따라 계산하였으며 실험 역시 시뮬레이션과 같은 조건으로 수행하였다. 시뮬레이션 결과를 보면, 매질의 두께가 0 cmn에서 8 cm로 증가하면, 계수율은 평행구멍형조준기의 경우 17%(공기), 60%(아크릴) 감소하였으며 확산형 조준기의 경우 감소율이 더 심하여 각각 86%(공기), 98%(아크릴)의 계수율 감소를 보였다. 실제 실험 결과도 시뮬레이션 결과와 비슷하게 매질의 두께가 0 cm에서 8 cm로 증가하면 평행구멍형조준기의 경우 계수율은 10%(공기), 54%(아크릴) 감소하였으며 확산형조준기의 경우 36%(공기), 63%(아크릴)의 계수율 감소를 보였다. 영상의 공간분해능 역시 매질의 두께가 증가할수록 저하되었다. 연구결과 소형 감마카메라를 임상적으로 사용하고자 할 때 감마카메라를 질환 부위에 최대한 밀착시키고 산란매질 두께를 최소화해야 고효율, 고분해능 영상을 얻을 수 있음을 확인하였다. Effect of scatter media materials and thickness, located between radioactivity and small gamma camera, on imaging characteristics was evaluated. The small gamma camera developed for breast imaging was consisted of collimator, NaI(T1) crystal(60$\times$60$\times$6 ㎣), PSPMT(position sensitive photomultimplier tube), NIMs and personal computer. Monte Carlo simulation was performed to evaluate the system sensitivity with different scatter media thickness(0~8 cm) and materials(air and acrylic) with parallel hole collimator and diverging collimator. The sensitivity and spatial resolution was measured using the small gamma camera with the same condition applied to the simulation. Counts was decreased by 10%(air) and 54%(acryl) with the parallel hole collimator and by 35%(air) and 63%(acryl) with the diverging collimator. Spatial resolution was decreased as increasing the thickness of scatter media. This study substantiate the importance of a gamma camera positioning and the minimization of the distance between detector and target lesion in the clinical application of a gamma camera.