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김창조(Gim TzangJo),이재승(Lee JaeSeung),최윤(Choi Yoon),최은하(Choi EunHa),박철우(Park ChulWoo),김종국(Kim JongKuk),김영권(Kim YoungGweon),엄창용(Um ChangYong) 대한기계학회 2009 大韓機械學會論文集A Vol.33 No.3
Focused ion beam system was designed, which includes LMIS, electrostatic lens and high voltage power supply. Control program is updated for high speed image processing. The details of vibration-free vacuum system and other important electrical parts were trouble-shooted for appropriately controlling high acceleration voltages.
김창조(Gim TzangJo),이재승(Lee Jae Seung),최윤(Choi Yoon),최은하(Choi EunHa),박철우(Park ChulWoo),김종국(Kim JongKuk),김영권(Kim YoungGweon),엄창용(Um ChangYong) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
Focused ion beam system was designed, which includes LMIS, electrostatic lens and high voltage power supply. Control program is updated for high speed image processing. The details of vibration-free vacuum system and other important electrical parts were trouble-shooted for appropriately controlling high acceleration voltages.
Jeong HyeJeong,정성원,Heo Tae Gil,Choi Pyong Wha,Kim Jae Il,Jung Sung Min,Jun Heungman,신용찬,Um Eunhae 대한외상학회 2022 大韓外傷學會誌 Vol.35 No.3
Purpose: The purpose of this study was to determine whether a higher Injury Severity Score (ISS) could serve as an indicator of splenectomy in patients with traumatic splenic lacerations. Methods: A total of 256 cases of splenic laceration were collected from January 1, 2005 to December 31, 2018. After the application of exclusion criteria, 105 were eligible for this study. Charts were reviewed for demographic characteristics, initial vital signs upon presentation to the emergency room, Glasgow Coma Scale, computed tomography findings, ISS, and treatment strategies. The cases were then divided into nonsplenectomy and splenectomy groups for analysis.Results: When analyzed with the chi-square test and t-test, splenectomy was associated with a systolic blood pressure lower than 90 mmHg, a Glasgow Coma Scale score lower than 13, active bleeding found on computed tomography, a splenic laceration grade greater than or equal to 4, and an ISS greater than 15 at presentation. However, in multivariate logistic regression analysis, only active bleeding on computed tomography showed a statistically significant relationship (P=0.014).Conclusions: Although ISS failed to show a statistically significant independent relationship with splenectomy, it may still play a supplementary role in traumatic splenic injury management.
Jang Youngjin,정성민,Heo Tae Gil,Choi Pyong Wha,Kim Jae Il,정성원,Jun Heungman,신용찬,Um Eunhae 대한대장항문학회 2022 Annals of Coloproctolgy Vol.38 No.6
Purpose: Most of the causes of small bowel obstruction (SBO) in patients without a history of abdominal surgery are unclear at initial assessment. This study was conducted to identify the etiology and clinical characteristics of SBO in virgin abdomens and discuss the proper management. Methods: A retrospective review involving operative cases of SBO from a single institute, which had no history of abdominal surgery, was conducted between January 2010 and December 2020. Clinical information, including radiological, operative, and pathologic findings, was investigated to determine the etiology of SBO. Results: A total of 55 patients were included in this study, with a median age of 57 years and male sex (63.6%) constituting the majority. The most frequently reported symptoms were abdominal pain and nausea or vomiting. Neoplasm as an underlying cause accounted for 34.5% of the cases, of which 25.5% were malignant cases. In patients aged ≥60 years (n=23), small bowel neoplasms were the underlying cause in 12 (52.2%), of whom 9 (39.1%) were malignant cases. Adhesions and Crohn disease were more frequent in patients aged <60 years. Coherence between preoperative computed tomography scans and intraoperative findings was found in 63.6% of the cases. Conclusion: There were various causes of surgical cases of SBO in virgin abdomens. In older patients, hidden malignancy should be considered as a possible cause of SBO in a virgin abdomen. Patients with symptoms of recurrent bowel obstruction who have no history of prior abdominal surgery require thorough medical history and close follow-up.
Differentiation of gallbladder adenomyomatosis from early-stage gallbladder cancer before surgery
Jisum Moon,Yong Chan Shin,Tae-Gil Heo,Pyong Wha Choi,Jae Il Kim,Sung Won Jung,Heungman Jun,Sung Min Jung,Eunhae Um 한국간담췌외과학회 2019 Annals of hepato-biliary-pancreatic surgery Vol.23 No.4
Backgrounds/Aims: This study aimed to compare the perioperative and clinical outcomes in patients undergoing laparoscopic cholecystectomy for gallbladder adenomyomatosis (GBA) or early-stage gallbladder cancer (GBC). Methods: The perioperative and clinical outcomes of 194 patients diagnosed with GBA and 30 patients diagnosed with GBC who underwent laparoscopic cholecystectomy in our institution from January 2011 to December 2017 were retrospectively compared. Results: There were no significant differences between the GBA and GBC groups in sex (male:female ratio 1.0:0.8 vs. 1.0:0.7, p=0.734), BMI (23.9±3.4 vs. 24.0±3.8 kg/㎡, p=0.916), or preoperative liver function tests. Patients in the GBC group were significantly older (50.5±14.1 vs. 65.9±10.6 years, p<0.001) and had a higher ASA grade (40.3 vs. 63.4% grade II or III, p=0.043) than patients in the GBA group. Although there was no significant difference in preoperative diagnostic methods (p=0.442), the GBC group showed a significantly higher rate of misdiagnosis on preoperative imaging compared with postoperative histopathologic findings (30.9% vs. 53.3%, p=0.011). There were significantly more patients with gallstones in the GBA group than in the GBC group (68.6% vs. 40.0%, p=0.004). Conclusions: In older patients hospitalized for biliary colic without gallstones but with a thickened gallbladder wall with inflammation on preoperative diagnostic exam, the possibility of early-stage GBC should be considered.