관상동맥내 스텐트 삽입후 발생한 관상동맥류 2례

제인수,허민영,문치숙,이재호,정수룡,조길현,이영민,김대경,김두일,김동수 인제대학교 백병원 2002 仁濟醫學 Vol.23 No.3

Coronary artery aneurysms are detected with increasing frequency because of the routine use of coronary angiography in the diagnosis and management of coronary artery disease. Although some coronary artery aneurysms are congenital or inflammatory, most are atherosclerotic. The prognosis of atherosclerotic coronary artery aneurysm may depend on the morphology of the aneurysm or the presence of coexisting obstructive disease. Coronary artery aneurysms have been also reported to occur after ballon angioplasty, directional athrectomy, laser angioplasty, and stent implantation with a frequency of 2% to 4%. The long-term outcome of post-intervention coronary artery aneurysm is unknown. We report two cases of the development of a coronary aneurysm 6 months after stent implantation as a treatment of severe obsructive coronary artery disease.

Eleven Poems of Park Je-chun

Park Je-chun,Ko Chang Soo(번역자) The Academy of Korean Studies 1992 Korea Journal Vol.32 No.3

심부 매복 정중 과잉치 수술 시 마취방법 선택

민수영,송제선,이제호,최형준,손흥규,김성오 大韓小兒齒科學會 2012 大韓小兒齒科學會誌 Vol.39 No.1

Supernumerary tooth occurs most frequently at premaxilla area. Followed by mandibular premolar area, mandibular fourth molar area, maxillary paramolar area. Mesiodens are mainly impacted in the palatal area and surgical approach is made at palatal side. The time of surgery remains controversial. In case of inverted or horizontal impacted supernumerary tooth, intraosseous tooth movement and vertical growth of premaxilla makes surgical extraction more difficult. And also the more quantity of removed bone is, the higher degree of difficulty is. Inverted mesiodens of these cases were impacted superior to apex level of adjacent permanent incisor. Although CT examination revealed exact location of impacted tooth, surgical procedure including ostectomy may take a long time more than expected. So, before surgical extraction, it’s need to be considered several factors such as necessity of CT taking, degree of difficulty, direction of surgical approach, necessity of general anesthesia etc. 정중 과잉치(mesiodens)는 대개 상악 절치부에서 발견되며, 주로 구개측에 위치하는 경향이 있다. 정중 과잉치의 자연맹 출 가능성이 관찰되면, 주기적으로 검사하여 구강내로 충분히 맹출한 후에 단순발치를 시행한다. 주기적 검사에서 자연맹출 소견이 보이지 않거나, 형태이상 혹은 맹출방향의 이상으로 구강 내로 자연맹출 할 가능성이 없으면, 수술적 제거방법을 고려 해야 할 것이다. 특히, 인접한 중절치나 측절치의 맹출을 방해하고 있는 상황이 관찰된다면, 빠른 시일 내에 과잉치 제거를 위 한 수술적 방법을 시도하는 것이 타당하다. 한편, 외과적 수술의 시기를 늦추는 것을 고려해야 하는 경우도 있다. 정중과잉치가 인접하여 발육중인 정상 치아의 맹출을 방해하지 않는 경우이다. 이때, 삼차원 CT사진을 촬영하여보면, 과잉치 주변으로 영구절치의 치배가 근접하여 성곽처럼 둘러 싸고 있는 것을 볼 수 있다. 미성숙한 치배가 둘러 싸고 있는 상황에서, 무리하게 과잉치를 제거하려고 시도할 경우 인접 치배 를 손상시킬 가능성을 배제하기 어렵다. 이 점을 고려 한다면, 가급적 인접한 치아의 치근이 보다 발육한 후에 수술을 시도하 는 것이 바람직할 것이다. 초등학교 2학년 이상의 어린이들은 외래에서 국소마취하 제거하는 수술방법에 대개 잘 적응하며 고학년이 될수록 보다 수월해진다. 수술시기를 너무 늦추거나, 과잉치가 너무 늦게 발견된 경우 구개측 심부로 깊이 이동한 것을 볼 수 있다. 때로는 과잉치의 위치가 처음부터 심부에 매복되어 있을 수 있다. 이와 같은 경우, 전신마취방법을 생각해 볼 수 있을 것이다. 본 증례는 상악 정중부의 깊은 부위에 역위 매복된 과잉치를 외래에서 국소마취하에 치료를 시도할 때 관찰되는 문제점을 고찰하였고, 전신마취방법을 결정하기 위한 기준을 제시하였다. 심부 매복된 치아의 외과적 발거시 어린이의 행동조절이 가장 큰 문제였으며, 방사선 소견상 과잉치 치관의 위치가 절치의 치근단보다 상방에 위치할 경우 전신마취로 전환 하는 것이 바람직 할 것으로 사료된다.

지령 경로의 왜곡에 의한 고속가공 경로의 생성에 관한 연구

이철수,이제필 한국공작기계학회 1998 한국생산제조학회지 Vol.7 No.5

Recently many investigations have been studied on the high-speed machining by using machine tools. A CNC machine tool makes some tool path errors caused by software acceleration/deceleration. The faster a cutting feedrate is, the bigger the tool path errors are. Some known methods reduce these kinds of errors, but they make the total cutting increased. The paper presents a feed-forward algorithm that can be generated by distorting the original tool path, and reduces the tool path errors and the total cutting time. The algorithm to generate a new tool path is represented as following; 1) calculating each distance of software acceleration/deceleration between two adjacent blocks. 2) estimating the distorted distance which is the adjacent-ratio-constant(K_1, K_2) multiply the distance of software acceleration/deceleration. 3) generating a 3-degree Bezier curve approximating the distorted tool path. 4) symmetrically transforming the Bezier curve about the intersection point between two blocks, and 5) connecting the transformed Bezier curve with the original tool path. The algorithm is applied to FANUC 0M. The study is to promote the high-precision machining and to reduce the total cutting time.

전기적인 열원을 가진 변압기 내부에서 층류 자연대류의 수치해석

오건재,하수석 慶南大學校 附設 工業技術硏究所 1998 硏究論文集 Vol.16 No.-

본 논문은 20KVA 유입자냉식 변압기 내부의 공간에서 일어나는 층류 자연대류에 대하여 수치해석 하였다. 변압기 내부의 코어부분은 일정한 열원을 가지는 원통형 실린저로 가정하였고, 계산은 Rayleigh수가 10³-10?인 경우에 대하여 수행하였다. 계산 결과로부터 내부실린더의 평균 Nusselt수와 Rayleigh수에 대한 상관 관계식을 얻을 수 있었으며, Rayleigh수의 변화에 따라 대류영역과 전도영역은 내부실린더의 벽면에서 잘 나타났다. Numerical analysis of the laminar natural convection in an enclosure of the 20KVA oil-immersed transformer model is presented. The core in the transformer is modeled as a cylinder with a heat source. Calculations are carried out for Ra=10³-10?. The correlating equation between the inner cylinder mean Nusselt numbers and Rayleigh numbers can be obtained. The conduction and convection regimes for the variation of Rayleigh numbers are well represented in the temperature distributions along the side wall of the inner cylinder.

人體恐水病의 病理 : 病毒學的으로 確認된 人體恐水病 一症例의 病理學的檢索

李聖洙,池堤根 서울의대 1960 서울의대잡지 Vol.1 No.1

중학교 3학년 과학교과서 내용의 비교 연구

오제직,임갑수 공주대학교 사범대학 과학교육연구소 1992 과학교육연구 Vol.23 No.1

The contents of five different science textbooks presently in use and the older science textbook(published before 1987) were selected and analyzed. More active reforms in science textbooks are necessary for future revision to fit the needs of science education in the 21st century. The results of this study can be summarized as follows: 1. There was little difference in the quantity of materials among five kinds of science textbooks now in use. 2. Science textbooks now in use had more pages, reading, nd Gothic-type terms than old science textbook. 3. Science textbooks now in use have less figures and tables than old science textbook. 4. Each of the science textbooks now in use had so many common parts that its contents were almost the same. 5. It was found that some terms used in the five kinds of science textbooks now in use were not unified. 6. It was found that some of the materials in five kinds of science textbooks now in use varied in thier contents.

조직적스포츠참가가 스포츠태도에 미치는 영향

김규수,이재홍 龍仁大學校 1991 용인대학교 논문집 Vol.7 No.-

The purpose of this study was to compare differences on the sport attitude between athletes and non-athletes among middle school students. Data collected from a questionnaire designed for this study consisted of foreed-choice response to item constructed to represent the operational definitions for each variable. The inventory was administered to 322 athlete(male : 174, female : 148) and 431 non-athletes(male : 218, female : 213) among middle school student in Seoul. To data analysis, statistics employed this study was t-test. Based upon the result of this study, the following conclusion appear warranted. 1. In cases of attitudes on the sparing of time and money, fostering simple thinking and selfish, strengthening the violence, increascing the reasonable competition, strengthening the mental fitness, and cultivating the discipline compared to non-athletes, while non-athletes are more positive than athletes in attitude toward character buliding. 2. Athletes participating in dual sports are more negative than that in individual sports in strengthening the violence, but in the cases of attitudes on the sparing of time and money, fostering simple thinking and selfish, nationalism, strengthening the violence, character building, increaseing the reasonable competition, strengthening the mental fitness, and cultivating the discipline.

Mycophenolic Acid와 Rapamycin이 흰쥐 사구체 혈관간세포증식과 세포외기질 생성에 미치는 영향

김명수,박제현,하헌주,허규하,서지연,김유선,김혜진,박기일 이화여자대학교 약학연구소 2004 藥學硏究論文集 Vol.- No.14

Background: Excess proliferation and extracellular matrix (ECM) accumulation of mesenchymal cells such as vascular smooth muscle cells (VSMC) and glomerular mesangial cells cause chronic allograft nephropathy showing transplant vascular sclerosis and glomerulosclerosis. Mycophenolic acid (MPA) and rapamycin (RPM) are well known as strong inhibitors of VSMC proliferation, but their effects on the glomerular mesangial cells are not yet clearly understood. This study examined the effects of MPA or RPM on PDGF-induced proliferation and ECM accumulation in rat glomerular mesangial cells. Methods: Mesangial cells isolated from the glomeruli of Sprague-Dawley rats were cultured with DMEM containing 20% fetal bovine serum. Growth arrested and synchronized cells were administered with test drugs (MPA10 nM-10μM, RPM 0.1 nM-1μM) before the addition of PDGF 10 ng/mL. Cell proliferation was assessed by [³H]thymidine incorporation, collagen by [³H]proline incorporation, and fibronectin, ERK, and p38 MAPK by Western blot analysis. Results: PDGF increased mesangial cell proliferation by 4.64-fold. Compared to stimulated control, MPA above 500 nM and RPM above 10nM showed a significant inhibitory effect in a dose-dependent manner. The IC_(50) of MPA and RPM against PDGF-induced mesangial cell proliferation were around 500 nM and 100 nM, respectively. The collagen synthesis was also inhibited by MPA and RPM, but the fibronectin secretion was inhibited by MPA alone. The proliferation of mesangial cell correlated with activation of ERK and. p38 MAPK. MPA, but not RPM, inhibited ERK and p38 MAPK activation. Conclusion: This study demonstrated that MPA and RPM significantly inhibited PDGF-induced proliferation and ECM production in rat glomerular mesangial cells. The inhibitory effects of MPA, but not RPM, are correlated with ERK and p38 MAPK.

대퇴골두 무혈성 괴사에 속발된 대퇴경부 골절

임수재,제한웅 순천향의학연구소 2005 Journal of Soonchunhyang Medical Science Vol.11 No.1

Purpose : This paper studies characteristics, occurrence types, radiographs, MRI(magnetic resonance imaging), and histopathologic findings of femur neck fracture following avascular necrosis of the femoral head. Materials and Methods : The subjects of this study are femur neck fracture following avascular necrosis of the femoral head occurring in 7 cases of 7 Patients with osteonecrosis of femoral head among 130 cases of 68 patients who were treated at our hospital from March 2001 to March 2005, and analyzed though plain radiography finding, MRI, and histopathologic test. Results : All 7 cases were found of osteonecrosis of the bilateral femoral head, and most of avascular necrosis in parts of femoral neck fracture had invaded entire femoral head. Simple radiographic findings were 1 case of stage Ⅱ, 4 case of stage Ⅲ, and 2 cases of stage Ⅳ according to the Ficat and Alert classifications, MRI finding included 5 cases of class C, 2 cases of class D according to the Mitchell classification, and all cases found lesions of low signal intensity in T1W1, high signal intensity in T2W2, and other parts. The 1 case of histopathologic test developed femur neck fracture between the necrotic zone and the reparative zone. The form of femoral head fracture includes 5 case of type A, and 2 case of type B according to the Usui classification Conclusion : A spontaneous femur neck fracture can occur without any special exterior force between the necrotic zone and reparative zone in case invaded with wide range of osteonecrosis of the femoral head.