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김유철,김광수,Yu Cheol Kim,Kwang Soo Kim 대한안과학회 2007 대한안과학회지 Vol.48 No.8
Purpose: This study was designed to evaluate the effect of internal limiting membrane (ILM) peeling in the surgical management of idiopathic macular epiretinal membrane (ERM). Method: The records of 36 patients (36 eyes) with idiopathic macular ERM who had undergone pars plana vitrectomy with removal of the ERM were retrospectively reviewed. The patients were divided into two groups: eyes with (18 eyes) or without (18 eyes) ILM peeling. The best corrected visual acuity (BCVA), recurrence of ERM, persistence of retinal wrinkling, as well as the complications and improvement of visual acuity of the two groups were compared. Results: The mean pre-operative BCVA for the two groups was 0.29 in the group with ILM peeling and 0.26 in the group without ILM peeling, while the mean post-operative BCVA was 0.59 and 0.50, respectively. Although the post-operative BCVA significantly improved in both groups (P=0.001), there was no statistically significant difference between the two groups (P>0.05). However, the persistence of retinal wrinkling greatly decreased in the group with ILM peeling, and ERM recurred in two cases in the group without ILM peeling. Conclusion: ILM peeling in the surgical management of idiopathic macular ERM does not affect the postoperative results of visual acuity and complications, except for the persistence of retinal wrinkling and recurrence.
시각장애인을 위한 스마트 약 포지 제작 및 어플리케이션 개발
김유철(Kim Yu Cheol),루이스(Luis Arturo Cavazos Quero),?晶(Yang Jing),??(He Dong),이지연(Lee Ji Yeon),최용준(Choi Yong June),조준동(Cho Jun Dong) 한국HCI학회 2017 한국HCI학회 학술대회 Vol.2017 No.2
본 연구는 약을 복용하는데 불편함을 겪고 있는 시각장애인을 위한 스마트 약 포지 제작 및 어플리케이션 개발을 제안한다. 스마트 약 포지는 시각장애가 있는 사람들이 어플리케이션을 통해 약에 대한 정보를 얻을 수 있도록 구성된다. 스마트 약 포지에는 점자와 QR 코드가 탑재된다. 점자로 약에 대한 기본적인 정보를 얻을 수 있고, 스마트폰을 통해 QR 코드를 스캔하게 되면, 어플리케이션으로 연동되어 보다 더 자세한 정보를 얻을 수 있다. 본 연구는 스마트 약 포지와 어플리케이션이 향후에는 의사와 약사, 환자를 연결해주는 하나의 통합적 매개체로 발전할 것을 기대한다.
공업화학,촉매/반응공학 : Methane의 CO2 Reforming 반응에 대한 Pt/CexZr1-xO2(x=0, 0.5, 1)의 환원-산화특성과 반응성
김유철 ( Kim Yu Cheol ),김기석 ( Kim Gi Seog ) 한국화학공학회 2004 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.42 No.2
Relationship between the redox property and the reactivity for CO₂ reforming of methane was investigated on 0.5wt% platinum-impregnated CeO₂, Ce_(0.5)Zr_(0.5)O₂ and ZrO₂ Whereas CO-O₂ and CO-CO₂ cyclic pulse experiments at 600℃ showed that the redox property was in the order of Pt/Ce_(0.5)Zr_(0.5)O₂>Pt/CeO₂>>Pt/ZrO₂, the reactivity for CO₂ reforming of methane was in the order Pt/ZrO₂>Pt/Ce_(0.5)Zr_(0.5)O₂>Pt/CeO₂ by pulse experiments at 550-600℃ with stoichiometric mixture of the reactants. From the fact that relatively irreducible Pt/ZrO₂ exhibited higher reactivity than Pt/Ce_(0.5)Zr_(0.5)O₂ possessing more vigorous redox property, it could be deduced that Pt/ZrO₂ follows the reaction mechanism unequal to that for Pt/Ce_(0.5)Zr_(0.5)O₂ or Pt/CeO₂. While the reactivity Pt/ZrO₂ reached a steady level from the beginning, the reactivity of Pt/Ce_(0.5)Zr_(0.5) and Pt/CeO₂ varied with the extent of catalyst reduction. Complete oxidation of methane was initially more dominant on Pt/Ce_(0.5)Zr_(0.5)O₂ due to its vigorous oxygen mobility, however, the selectivity toward CO₂ reforming of methane increased with the number of reactant pulses before it reached a steady level.
제3차 대한간학회 춘계학술대회 초록집 : 포스터연제 토의 ; 반복되는 저혈당성 혼수로 발현된 간세포암 1예
김재학 ( Kim Jae Hag ),홍현주 ( Hong Hyeon Ju ),송은정 ( Song Eun Jeong ),양정훈 ( Yang Jeong Hun ),김경현 ( Kim Gyeong Hyeon ),정숙향 ( Jeong Sug Hyang ),김유철 ( Kim Yu Cheol ),김창민 ( Kim Chang Min ),이진오 ( Lee Jin O ),강태 대한간학회 1997 Clinical and Molecular Hepatology(대한간학회지) Vol.3 No.2(S)
간세포암종에 대한 Cyberknife 치료 후 완전관해가 왔던 환자에서 하반신 마비가 발생한
노금엽 ( Geum Youb Noh ),한철주 ( Chul Ju Han ),김연주 ( Youn Joo Kim ),양기영 ( Ki Young Yang ),박수철 ( Su Cheol Park ),김진 ( Jin Kim ),김유철 ( Yu Cheol Kim ),김미숙 ( Mi Sook Kim ) 대한간암학회 2011 대한간암학회지 Vol.11 No.2
Radiation therapy (RT) is one of the managements for unresectable hepatocellular carcinoma (HCC). Traditionally, RT has played only a limited role in HCC treatment because of its low efficacy and the low tolerance of the liver for this modality. However, as the technology of RT grows rapidly in recent years, indication of RT for HCC has been extended remarkably. Stereotactic body radiation therapy (SBRT) is a technique that allows precise delivery of a large ablative radiation dose to the tumor while sparing normal surrounding tissue in 1 to 5 fractions. As RT becomes useful therapeutic strategy, the important problem is that there could be serious complication after RT. Here we present a case of 54 years old male with advanced stage of HCC, who underwent a serious neurologic complication of paraplegia following Cyberknife (CK) treatment. He had a huge HCC in right lobe of the liver, and initially transarterial chemoembolization (TACE) was performed with an unsatisfactory response. Therefore, CK was performed, and another TACE was done for a new lesion, which was followed by remarkable complete remission of the tumor. However, paraplegia developed in both of his lower extremities a year after CK. Investigation has shown radiation myelitis as the cause of paralysis. Three and a half years have passed since CK treatment, and HCC is still in complete remission state, however, paraplegia is persistent now. Radiation myelitis should be considered as a complication, when CK is applied to treatment of HCC.