소아 흉통의 원인질환에 따른 임상양상

장국찬,김은영,노영일,양은석,문경래,박영봉 朝鮮大學校 附設 醫學硏究所 2008 The Medical Journal of Chosun University Vol.33 No.2

목적: 소아에서의 흉통은 흔히 접하게 되며 일반적으로 좋은 경과를 보인다. 가장 흔한 원인으로 특발성, 골격계이상, 위장관계 질환 등이 다양하게 언급되고 있으며 감별진단이 쉽지 않아 여러 검사를 시행하게 된다. 자세한 병력청취와 진찰이 진단에 가장 중요하다고 하지만 통계적 의의를 보고한 바는 드물다. 이에 흉통 원인을 분류하고 각각의 임상양상을 파악하여, 병력 청취와 진찰소견의 감별진단에 대한 유용성과 시행 검사들의 의의를 알아보고자 하였다. 방법: 2004년 3월 부터 2007년 8월 까지 조선대학교 병원 소아청소년과에 흉통을 주소로 방문한 환아 77명을 대상으로 하였다. 연령, 성별, 흉통의 위치, 지속시간, 양상, 빈도, 방문까지 걸린 시간, 동반증상, 유발인자의 각 항목과 원인 질환과의 관련성을 분석하였다. 흉부방사선, 심전도, 심초음파, 24시간 Holter, 운동부하 심전도, 상부 위장관 조영술, 24시간 pH 검사, 위내시경, 심근효소를 검사 하였다. 결과: 평균 나이는 10.2±2.8세로 6세에서 11세까지가 48명(62.3%)으로 가장 많은 분포를 보였고 남아 42명(54.5%), 여아 35명(45.5%)이었다. 흉통의 위치는 좌측이 32명(41.6%), 양상은 콕콕 찌르는 것이 27명(35.1%)으로 가장 많았고 지속시간은 1분미만이 36명(46.8%), 1-5분 사이가 28명(36.4%)으로 대부분 5분 미만이었다. 흉통 원인은 특발성이 27례(35.1%)로 가장 많았고, 위장관 질환 23례(29.9%), 늑골 연골염 12례(15.6%), 심혈관 질환 7례(9.1%), 정신신체화 질환 6례(7.8%), 폐질환 2례(2.6%)였다. 여아에서 연령이 높을수록 정신신체화 질환의 빈도가 높았다(P= 0.046). 흉골 하부 통증을 호소한 17명 중 13명(76.5%)이 위장관 질환으로 통계적으로 유의하였다(P= 0.023). 정신 신체화 질환은 6명에서, 위장관 질환도 20명(86.9%)에서 흉통지속시간이 5분 미만이었으나 통계적 의의는 없었다. 흉통 양상 중 타는 듯한 양상을 호소한 7명중 6명에서 위장관 질환이 원인이었으나 통계적 의의는 없었다. 선택 시행 검사 중 심초음파는 32명중 3례(9.4%), 24시간 Holter 검사는 13명중 5례(35.7%), 24시간 pH 검사는 28명 중 16례(57.1%)에서 이상소견을 보였다. 결론: 소아 흉통 환자 중 연령이 높은 여아에서는 정신 신체화 장애를, 흉골 하부 통증을 호소한 경우는 위장관 질환을 먼저 생각하는 것이 좋다고 판단된다. 흉통원인으로 위장관 질환의 빈도가 높고 시행검사들의 진단율을 볼때, 소아 흉통 환아 에서는 상부 위장관 조영술 등 위장관 질환의 검사를 기본적으로 시행하는 것이 좋을 것으로 생각된다. Purpose: Chest pain in children is usually benign. Chest pain in children results from a wide variety of causes. Differential diagnosis of causes is not easy and then many diagnostic approach is trying. Careful history and physical exams must guide the assessment of children with chest pain. The purpose of this study intends to evaluate children with chest pain and usefulness of careful history, physical examination and several diagnostic examinations. Methods: From March 2004 to August 2007, 77 patients presented with chest pain were enrolled. we evaluated age, sex, characteristics of chest pain (location, duration, description, frequency), accompanying symptoms, increasing reasons and relationship with cause of chest pain. Chest x-ray and ECG were checked in all patients. Cardiologic and gastrointestinal evaluations were checked when considered necessary. Results: The male and female ratio was 0.55:0.45, mean age 10.2 ± 2.8 year. Common ages of chest pain were 10 to 12 years old (38case, 49.3%). The location was on the left precordium in 32cases (41.6%) of the patients. The most common diagnostic findings of chest pain were idiopathic(27cases, 35.1%), gastrointestinal disorder (23cases, 29.9%), costo chondritis (12cases, 15.6%), cardiovascular disorder (7cases, 9.1%), psychosomatic disorder(6cases, 7.8%) and pulmonary disorder (2cases, 2.6%). Older children in female were more likely to have a psychosomatic cause (P= 0.046). The patients complained chest pain on substernal area were 17cases and 13cases (76.5%) were diagnosed as gastrointestinal disorder (P= 0.023). Positive findings of echocardio graphy, 24hr Holter ECG and 24hr pH monitoring were present in 3 (9.4%), 5 (35.7%) and 16 (57.1%) of the patients respectively. Conclusion: Gastrointestinal disorders are common causes and positive diagnostic rate of gastrointestinal evaluation is relatively high in children with chest pain. Old girls are more likely to have a psychosomatic disorder and substernal pain is the reliable sign to be considered as a gastrointestinal disease in children with chest pain. Hence, Diagnostic approach of gastrointestinal disease such as upper GI should be performed basically in mostly children with chest pain.

Fe基 非晶質形成에 미치는 半金屬(P, C, B)의 影響

鞠辰善,陳永喆 全北大學校 1996 論文集 Vol.42 No.-

The effects of Metalloids(P, C, B) addition on the amorphous formation range, thermal stability and crystallization behavior of Fe_100-XC_X, Fe_100-XP_X, Fe_100-XB_X, (X=14, 17, 20at%)alloys were investigated by the XRD, SEM, TEM and DSC. The results were summarized as follows; 1. Binary Fe-P and Fe-B alloys were amorphized in the composition range of 17 to 20at%P and 14 to 20at%B by melt spinning. On the other hand, binary Fe-C alloys were not amorphized in the composition range of 14 to 20at%C because of precipitation bcc-Fe and Fe_3C. 2. The value of T_g/T_m was estimated over 0.45 when the content of P is 17at%, 20at% and that of B is 14at%, 17at% and 20at%. In this value(T_g/T_m ≥ 0.45), it was shown that amorphization is possible.

Prednisolone과 Prednisone의 임상약동학적 평가

신재국,윤영란,차인준,이경훈,장인진,신상구,박찬웅 大韓臨床藥理學會 1994 臨床藥理學會誌 Vol.2 No.1

수술 고위험군에서 양측 내경동맥 협착증에 대한 동시 스텐트 시술

윤영섭,심원흠,편욱범,전국진,박경진,장양수,조승연 대한순환기학회 1999 Korean Circulation Journal Vol.29 No.9

가상 전력 이론에 대한 Comments와 실험적인 검증

정영국 대불대학교 2003 論文集 Vol.9 No.1

This paper presents comments and experimental verification on the fictitious power theory suggested by Van Wyk and Enslin. The power in the theory is defind and analyzed by time domain approach, thus it is easy to understand and instrument. The power is decomposed into active, reactive and deactive components based on the autocorrelation and crosscorrelation signal techniques between voltage and currentwaveforms. On the compensation property, active power filter deal with three components only. Also, for real time control of active power filter, the power models with difficultconcept are not cost effective. For the verification of the fictitios power theory, experimental work for DSP(digital signal processor) based voltage type active power filter is achieved. The power of thyristor controlled motor drive system is decomposed into three orthogonal components by the fictitious power theory.

토끼의 관절연골 인공손상후 재생과정

편영식,권건영,손국진 啓明大學校 醫科大學 1997 계명의대학술지 Vol.16 No.2

Articular cartilage consists of sparsely distributed chondrocytes surrounded by an elaborated highly organized macromolecular framework filled with water. Three classes of macromolecules (collagen, proteoglycan, noncollagenous protein) form the macromolecular framework. It is debatable whether chondrocyte has the ability to replicate in normal situation or damaged situation. But in general the articular cartilage is known as a tissue which does not have specific reaction in dormed state after maturation cease and in damaged portion fibrous tissue transformed to a greater or lesser extent to fibrous cartilage and the formation of an imperfect form of hyaline cartilage in occasional foci. In orthopedic department, injury to the articular cartilage can develop frequently and healing process takes major part in articular function. In this point in order to know the healing process in damaged articular cartilage, we made (cartilage)l defect including subchondrea tone on medial and lateral condyle of the rabbit femur and observed the healing process by light microscope. Through the experiment, we observed articular cartilage regeneration in subchondral defect area. Some of the subchondral defect areas of rabbit femoral cartiage become fibrillated, lose their matrix metachromasia and tend to develop chondrocyte clusters, thus mimicking human osteoarthritis and it is needed more cases and electron microscopic examination and immunochemical examination to know cartilage regeneration after cartilage injury.

인터넷 시스템의 수행도 분석 : visual information search and structure 시각정보 탐색 및 구조에 관하여

오영진,박노국 尙志大學校 生産技術硏究所 1998 生産技術論叢 Vol.6 No.-

Internet is used as a plentiful information storage in modern industrialized society. In WWW style home pages were developed to contain a large amount of information. Therefore the structure of home page is very important factor to find appropriate information in a short time interval. This paper compares the performance of three kinds of home page structures(plain type, tree type, graphic type). Experiment results show that tree type home page has the shortest information seeking time(47.16 sec.) and number of mouse click. Consequently, tree type home page is proper to show information efficient method and preferred for user oriented structuring method.

통신망을 활용한 프로젝트 학습 모형의 개발 및 적용과 메시지 분석을 이용한 상황적 평가

전영국,김정학,박홍준 한국컴퓨터교육학회 2005 컴퓨터교육학회 논문지 Vol.8 No.4

觀光資源의 魅力性測定 및 評價에 관한 硏究 : 慶州地域 15個 史蹟地區 文化觀光資源을 中心으로 Centered on the Cultural Resources on the Basis of Dividing Kyongju Area into 15 Historical Sites

金榮國 동국대학교 경주대학 1987 論文集 Vol.6 No.-

This research proposes to measure and evaluate the touristic attractiveness in tultral resources located in Kyongju area on the basis of dividing area into 15 historical sites. A set of ten criteria are selected, with attention to their "independence", which are the principle measures for the determination of touristic attractiveness. Then, through a procerr designed to elicit consistent judgments from interviewees, the contributions of twenty-six tourism experts were conbined to form a set of numerical weights which establish the relative importance of the ten criteria. The process of establishing a "score", as an indicator of the relative attractiveness of a touristic location, was employed the judgments of experts in making evaluations. As the results of this study, in terms usefullness, the procedure outlined herein provides a means for establishing a quantified index of touristic attractivenese as a basis for making comparisons among touristic locations or regions. It is not being recommended here as a single decision criterion, through it would have potential usefulness for decision-making purposes in combination with other factors. Another important point to recognize is that the quantification proceduse recommended here calls for the establishmens of the criteria and weights in conformity with the special conditions of the situation being studied. At a more general, an additional case can be made for employing this type of procedure. It is based on the fact that when decisions are made to invest in touristic facilites or to establish development priorities among competing touristic regions, comparatiue evaluations are made which involve the types of considerations incorporated in the index of touristic attractiveness. Finally, the quantified comparisons, which result from the use of explicit criteria and their relative weights, help provide a rationalization of choice which should give the administor a greater level of confidence in the correctness of his decisions.

중성선 전류 및 고조파류 저감을 위한 공간벡터 검출법 기반의 3상 4선식 능동전력필터

정영국,김영철 대불대학교 2004 大佛大學校大學院 硏究論文集 Vol.3 No.-

This paper deals with a space vector detection based a 3-phase 4-wire 4-leg active power filter which is proposed for reduction harmonic and neutral current in a 3-phase 4-wire supply system. The harmonics are cal-culated by the space vector detection and the neutral current is calculated from load current. The proposed system separately compensates harmonic and neutral current. For the investigation of a desired performance, the de-veloped algorithm is simulated using a PSIM. And steady state as well as transient state results are given and discussed in detail.