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한국인 간세포암 환자에서 경피적 에탄올 주입술의 치료 효과
강현우 ( Kang Hyeon U ),김윤준 ( Kim Yun Jun ),김강모 ( Kim Gang Mo ),강정묵 ( Kang Jeong Mug ),김수환 ( Kim Su Hwan ),김진현 ( Kim Jin Hyeon ),윤원재 ( Yun Won Jae ),윤정환 ( Yun Jeong Hwan ),윤용범 ( Yun Yong Beom ),이효석 ( Lee 대한소화기학회 2003 대한소화기학회지 Vol.42 No.6
Background/Aims: Percutaneous ethanol injection therapy (PEIT) is widely used for the treatment of hepatocellular carcinoma (HCC). However, its long-term therapeutic efficacy is not verified in Korea, one of hepatitis B virus (HBV) endemic areas. Thus, this study was to assess its efficacy and prognostic factors affecting tumor-free survival following PEIT in Korean HCC patients. Methods: From 1997 to 1999, 100 consecutive patients who had 1 to 3 HCC nodules of maximum diameter less than 3 cm and underwent PEIT were enrolled. Therapeutic efficacy, overall and tumor-free survival rates were assessed during follow-up periods. Results: In 83 patients, HCC nodules were completely ablated by PEIT. The cumulative 1, 2, and 3 year overall survival rates were 98%, 96%, and 88%, respectively. The cumulative 1, 2, and 3 year tumor-free survival rates were 73%, 50%, and 37%, respectively. Larger tumors (=2 cm) were associated with a higher local recurrence rate. Conclusions: These results demonstrate that PEIT is therapeutically useful in patients with HCC less than 4 in number and less than 3 cm in diameter. However, since multiple or large tumors are associated with low tumor-free survival or high local recurrence rates, PEIT for these tumors and the subsequent post-treatment follow-up should be performed carefully. (Korean J Gastroenterol 2003;42:502-509)
연속적으로 시행한 공장 근로자 건강 검진에서 무증상 간기능 검사 이상자의 임상적 특성
김강모,김윤준,이광혁,백도명,Kim, Gang-Mo,Kim, Yun-Jun,Lee, Gwang-Hyeok,Baek, Do-Myeong 한국건강관리협회 2005 한국건강관리협회지 Vol.3 No.2
Background/Aims The liver funtion tests(LFTs), such as aspartate aminotransferase(AST), alanine amino-transferase(ALT), r -glutamyl transferase( r -GT), have been widely used for screening tests but their low positive predictive value can cause many false positive results. To evaluate the clinical usefulness of these tests, we analyzed serial LFT results of single factory workers and compared the risk factor's in groups divided by the serial LFT results. Methods From June 2001 to October 2001, 1223 consecutive healthy workers in a single factory were enrolled and questionnaire, LFT and liver ultrasonography were performed. Previous LFT results were collected from Annual Health Examination Survey. According to the abnormalities in serial LFT, participants were classified into three groups (abnormal-in-both, alternating normal-in-both) and the risk factors were compared among these groups using multiple logistic regression Results The prevalence of LFT abnormality in a single test was 16.8% but, in serial LFT, only 5% of participants showed consistent abnormality. The risk factors for abnormal-in-both group, compared with alternating group, were liver ultrasonography abnormality such as fatty liver(odds ratio, 2.2; p=0.026) and heavy alcohol intake (more than 210g/week) (odds ratio, 7.2;P=0.064). HBsAg was not significant risk factor for any of the three groups. ConclusionIn factory workers with serial LFT abnormality, alcoholic liver disease could be the principal cause of abnormal LFT. Even if HBsAg were positive in patients with abnormal LFT, there is a possibility of another causes for LFT abnormalities such as alcoholic liver disease and nonalcoholic steatosis or steatohepatitis
마찰전기 효과가 접목된 하이브리드 자기-기계-전기 발전 소자의 출력 특성 향상연구
백창민 ( Chang Min Baek ),김민우 ( Min Woo Kim ),이지원 ( Ji Won Lee ),김현아 ( Hyun Ah Kim ),정지윤 ( Ji Yun Jung ),윤준현 ( Jun Hyeon Yoon ),김효일 ( Hyo Il Kim ),박예진 ( Ye Jin Park ),김기훈 ( Gi Hun Kim ),김소화 ( So Hwa Kim 한국전기전자재료학회 2022 전기전자재료학회논문지 Vol.35 No.6
Energy harvesting technologies that can convert wasted various energy into usable electrical energy have been widely investigated to overcome the limitation of batteries for the powering of IoT sensors and small electronic devices. Hybrid energy harvesting is known as a technology that enhances the output power of single energy harvesting device by housing two or more various energy harvesting mechanisms. In this study, we introduce a hybrid MME (Magneto-Mechano-Electric) generator coupled with the triboelectric effect. Through FEA modeling, four triboelectric materials, including PI (Polyimide), PFA(Teflon), Cu, and Al, were selected and compared with the expected triboelectric potentials. The effect of surface morphology was investigated as well. Among various combination of triboelectric materials and surface morphologies, PFA-Al combination with the surface morphology having nano-scale square projections showed highest output potential under triboelectrification. It is also experimentally confirmed that output voltage and power of the hybrid MME generator with triboelectric material combinations.
지역응급의료센터의 격리병상 과밀화 지표분석: 코로나-19 대유행 시기의 경기도 소재 지역응급의료센터 사례를 중심으로
이이산 ( San Lee ),유진현 ( Jin Hyun Yoo ),신소미 ( So Mi Shin ),노현웅 ( Hyun Woong Noh ),김윤준 ( Yun Jun Kim ),곽동훈 ( Dong Hun Kwak ),김형수 ( Hyung Soo Kim ),최익창 ( Ik Chang Choi ),서민구 ( Min Gu Seo ) 대한응급의학회 2024 대한응급의학회지 Vol.35 No.2
Objective: Emergency department (ED) overcrowding is a global issue that negatively impacts the clinical outcome. Through the coronavirus disease 2019 (COVID-19) pandemic era, overcrowding of ED isolated territory (isolation bed) was aggravated. This study analyzed overcrowding indices of ED isolation beds during the COVID-19 pandemic. Methods: This study was a single-center, retrospective, observational study. The study analyzed 34,925 patients who visited the ED during the COVID-19 pandemic from April 2021 to August 2022. Patients who were treated in isolation beds and regular beds were compared. Among the patients using isolation beds, patients who stayed longer than 720 minutes were also classified and analyzed. Results: During the analysis period, 4,479 and 34,943 patients were treated in the ED isolation bed and ED regular bed, respectively. The overcrowding indices (general ward admission rate, intensive care unit admission rate, ED-length of stay, transfer rate, mortality rate, prolonged ED stay patient ratio) of the isolation beds were significantly higher than those of the ED regular bed (P<0.05). The prolonged ED stay-patient ratio of isolation beds and regular beds was affected by the number of COVID-19 patients (regular bed, r=0.617 and P=0.01; isolation bed, r=0.525 and P=0.03). The average ED-length of stay of isolation beds was longer than that of the ED regular beds. One hundred and forty-five patients were classified as prolonged ED stay patients. Their time from the decision point to the discharge point comprised a higher rate with an average of 76.52%. Conclusion: ED isolation beds are more vulnerable to infectious disease outbreaks. A proper medical policy and arrangement management system that can flexibly deal with disaster emergencies are required