응급실로 내원한 장중첩증의증 환아의 진단방법에 대한 임상적 고찰

원형섭,박정배,표창해,김형수,박철완,이근 대한응급의학회 1995 대한응급의학회지 Vol.6 No.2

The purpose of this study is to evaluate the appropriate diagnostic methods for the patients with suspected intussusception. Intrssusception is a state that a portion of alimentary tract is telescoped into a segment just caudad to it, and has a characteristic symptoms of cyclic irritability, vomiting, bloody stools and palpable mass, It is the most common cause of acute or acquired intestinal obstruction in infants and children, and needs early diagnosis and immediate treatment. Authors reviewed retrospectively medical records of 411 infants & children with suspected intussusception from January 1, 1992 to December 31, 1994 and report the results with literature reviews. The results were as followings; 1) 263 cases were definite intussusception(DI) out of 411 suspected intussusception(SI). 2) The male to female ratio was 2.3 : 1 in SI and 2.8 : 1 in DI. 3) The distribution of age revealed that 85% of SI and 84% of DI were under 24 months old, and the most common age was 8 months in SI and 10 months in DI. 4) There were upper respiratory infection in 84 cases(2)%), gastroenteritis in 32 cases(8%) and bronchiolitis in 8 cases(2%) as preceding diseases. 5) The simple X-ray showed gaseous bowel distension in 212 cases(52%). 6) The most common symptoms and signs were cyclic irritability and abdominal pain(94%), bloody stools(72%), palpable abdominal mass(47%), in order. 7) Of 411 patients, 252 cases(61%) were diagnosed and treated by air enema(228 cases) and/or exploration(24 cases). Among 296 cases(72%) who showed bloody stools in digital rectal examination and glycerin enema, 245 cases(83%) were confirmed as intussusception through air enema and/or operative intervention, and that corresponds to 93% of DI. 8) Intestinal perforation as complication occurred in 3 of 393 cases who underwent air and barium enema, but all of them recovered without any sequelae after operation. Conclusively, it is thought that air enema preceded by digital rectal examination and glycerin enema is safe and useful method in diagnosis and treatment of infants and children with SI.

팽창흑연에 무기염을 함침시킨 화학열펌프용 반응블록의 특성연구

鄭元謨,柳玩浩 大田産業大學校 1996 한밭대학교 논문집 Vol.13 No.1

The chemical heat pump is more efficient than compression type heat punp, Furthermore, it is one of the system which dosen t use any CFCs whose productions and uses are scheduled to be phased out workdwide by Montreal Protocol. Therefore, the chemical heat pump will be expected as the heat pump for next generation. we have studied reacting block based on expanded graphits with impregnated inorganic salt such as chemical heat pump. The basic experimental apparatus is constructed and measuring of pressure-tempeature between ammonia and reacting block are conducted in order to eslimate charateristics of brock. The experimental results are shown that there isn t variation of pressure between block A and Block B, it is supposed that absorption ratio of blocks have no correlation with difference of apparent density. Also, when we compare withthe temperature profile according to time between two blocks, blocks A is constant but block A is shifted. These reasons are obsebed that block Ais less amount of salt and better heat conductivity than block B.

흉골 골절의 의의에 관한 임상적 연구

원형섭,황성연,박정배,이준형,박철완,이근 대한응급의학회 1996 대한응급의학회지 Vol.7 No.2

It has been known that sternal fracture increases the risk of potentially life-threatening injuries, such as myocardial, pulmonary, and thoracic vascular injuries, and it has 25% to 45% of mortality, primarily resulting from these underlying injuries. The authors reviewed retrospectively the medical records and radiographic findings of the patients who admitted with sternal fracture at Chung Ang Gil Hospital from 1 June 1994 to 31 December 1995 to evaluate the significance and clinical course of sternal fracture. The results were followings: 1. The male to female ratio was 3:2 and the mean age was 43.1 and 45.4 years old in male and female, respectively. 2. Motor vehicle occupant accident was the most common cause of sternal fracture. 3. Of 33 cases, there was no death, but common associated injuries which were rib fracture, hemothorax, lung contusion, vertebral fracture, penumothorax, long bone fracture, myocardial contusion, flail chest, facial chest, facial bone fracture, and pericardial effusion, in order. 4. The clinical course of sternal fracture was determined primarily by associated injuries except for communited sternal fracture. 5. The patients with isolated sternal fracture, who had an otherwise normal chest x-ray, normal electrocardiogram, no other significant associated injuries and are hemodynamically stable, had a benign clinical course.

Wafer final polishing에 따른 표면 현상과 마멸도에 관한 연구

원종구,이정택,황성철,차지완,이은상 한국공작기계학회 2008 한국공작기계학회 춘계학술대회논문집 Vol.2008 No.-

In recent years, developments in the semiconductor and electronic industries have brought a rapid increase in the use of silicon wafer. For further improvement of the ultra precision surface and flatness of Si wafer necessary to high density ULSI, it is known that final polishing is very important. Polishing one of the important methods in manufacturing of Si wafers and in thinning of completed device wafers. This study will report the evaluation on abrasion of wafer according to variety processing condition, which have major influence on the abrasion and surface defect of Si wafer polishing, were adapted to polishing pressure, machining speed, and the slurry mix ratio. Thus the optimum condition selection of ultra precision Si wafer polishing using load cell and infrared temperature sensor. To evaluate each machining factor, use a data through each sensor. That evaluation of abrasion according to variety condition is selected to use a result data that measure a pressure, machining speed, and the processing time. And optimum condition is selected by this result. By using optimum condition, it achieve a ultra precision mirror like surface.

와이어 기구를 이용한 자동차 시트 리크라이너 센서 개발

이정완,정원석 江原大學校 産業技術硏究所 2008 産業技術硏究 Vol.28 No.A

Belt Integrated Seat(BIS) has many advantages compared to the existing seats. Due to the development of materials and manufacturing technology, BIS, which has been used restrictely in the past, has gone through a rapid growth. As a result, its advantages have gained attention and the possibility of replacing the existing seats has grown. The need to develop BIS has risen and presently joint development with associated industries is in progress. For its first goal, the development and research of Recliner sensor has been selected. Recliner sensor is an essential part of the BIS in which the belt is incorporated onto the seat. In seat-belts, there is an inclination sensor which locks the belt according to the angle of a car. Because the inclination sensor can change frequently depending on the back of seat, a device which can enhance the inclination sensor according to the angle of the back of seat. It is the Recliner sensor that play's this role. Studies on Recliner sensor within and outside Korea has not yet made a salient progress, and due to this fact, the joint development has made a start by benchmarking other company's products. Currently, in other to set the course of the development, a research in patents and various other information is being done. In addition, for the purpose of developing a product which will be compatible with the existing products, a prototype will be made and tested before a new product makes its launching on the market.

열전 반도체를 이용한 냉수기 개발에 관한 연구

이원희,정순원,구경완,이명섭 永同大學校 1997 硏究論叢 Vol.3 No.1

본 논문에서는 기존의 냉매 대신에 열전 소자를 사용하여 구성한 냉수기가 갖는 여러 가지 장점 및 냉수기의 중요 소자인 TEC 모듈(Thermo Electric Cooler Module)에 대한 최대 효율 구동 방법 등을 연구하였다. 또, 열교환기의 재질 및 모양, 방열판과 냉각팬의 크기 등을 변화시키면서 냉수기로서 최적의 효율을 가질 수 있도록 냉수기를 설계하였고, 그 설계를 바탕으로 실험을 하여 TEC 모듈(Thermo Electric Cooler Module)을 이용한 냉수기가 상품화 가능성이 있는지를 검토하였으며, 그 결과를 기술하였다. We developed a new cooling system which applies TEC module using peltier effect. Our cooling system has better effiency and make smaller pollution than conventional cooling system. We applies that cooling system to making cool water dispenser. We designed the cold water dispenser of optimum effiency varying material, shape, and size of heat sink and cooling fan. The possibility of a commodity on this designed cold water dispenser is investigated.

산업재해 근로자의 직장복귀 예측요인

정원미,박정일,구정완,노영만 大韓産業醫學會 2003 대한직업환경의학회지 Vol.15 No.2

목적: 본 연구는 산업재해 근로자의 직장복귀에 유의하게 영향을 미치는 요인을 알아봄으로써 산업재해근로자의 직장복귀를 위한 재활 프로그램 수립을 위한 기초자료를 제시하고자 수행되었다. 방법: 근로복지공단 36개 지사로부터 2001년 1월부터 3월까지 접수된 13,903명의 장해보상청구서 복사본을 수집하여 이들 중 직업병자 및 외국인 근로자를 제외한 13,385명을 대상으로 계통표본추출하여 3,658명을 연구대상으로 하였다. 3,658명의 장해보상청구서로부터 인구사회학적, 사업장 및 장해 특성, 그리고 국민건강보험공단의 전산자료로부터 부양자수, 직장복귀여부 등에 관한 정보를 얻었으며 카이제곱 검정과 다변량 로지스틱 회귀분석을 이용하여 직장복귀 예측요인을 알아보았다. 결과: 직장에 복귀하지 못하는 유의한 예측요인은 다음과 같다. 인구사회학적 특성에서의 예측요인은 여성, 고령자 그리고 근무기간 2~6년에 비하여 6개월 미만이었다. 사업장 특성의 예측요인은 사업장 규모가 200인 이상에 비하여 29인 미만인 경우, 사업종류가 제조업에 비하여 전기·가스·수도업이었다. 장해관련 특성에서의 예측요인은 상해부위가 손가락에 비하여 발인 경우, 상해종류는 다른 종류에 비하여 골절인 경우이었다. 그리고 장해결과 특성에서의 예측요인은 10~14등급인 경우에 비하여 1-4등급인 경우, 요양기간이 180일 이상인 경우이었다. 결론: 여성, 고령자, 사업장 규모가 작은 경우 그리고 전기·가스·수도업에 종사하는 근로자들이 직장복귀를 하지 못하는 예측요인으로 나타남으로써 이들을 대상으로 한 재활프로그램 계획 수립에 보다 관심을 기울여야 될 것이다. Objectives: In order to obtain information useful in setting up occupational rehabilitation programs, an evaluation was conducted to determine predictive factors of workers' return to work after an occupational injury. Methods: 13,903 records of registered occupationally injured cases identified to have received disability compensation in 1998 were collected from the 36 branch of Korean Labor Welfare Corporation(KLWC). Through simple systematic sampling, a total of 3,658 cases were selected as final subjects. Status of return to work, general characteristics, workplace characteristics, disability characteristics and disability outcome characteristics were collected from the KLWC and National Health Insurance Corporation records (NHIC). For statistical analyses, chi-square test and stepwise multiple logistic regression analysis were applied using the SAS software package program. Results: Negatively affecting significant predictive factors for return to work were included the female gender, age of 50 years or older, 6 month or less of work duration, 1 or less family dependents, workplace with 200 or less employees, electric·gas·waterwork companies, foot injuries compared to finger injuries, fall from elevation, high degree of disability claims (1-4 grade), and period of medical care more than 181 days. Conclusions: The results suggest that the poor rate return to work in occupationally injured workers' is particularly affected by female gender, older-aged employees, and workers employed by electric·gas·waterwork companies. Also, it was more difficult to return to work for workers who received injuries from a fall from elevation and who had longer period of medical care (more than 181days). It is strongly recommended that more efficient and systematic occupational rehabilitation programs be set up, taking into consideration the above mentioned factors.

자연 판막에 발생한 아스페르길루스 심내막염 1예

서정원,김진현,박완범,신정임,김대희,윤창환,김용진 대한내과학회 2003 대한내과학회지 Vol.65 No.6

아스페르길루스 심내막염은 드물지만 매우 불량한 예후를 보이는 질환이다. 최근 심장 수술, 면역 저하, 장기간의 항생제 사용, 약물 남용 및 후천성 면역 결핍증 등의 선행 요인과 연관되어 빈도가 증가하고 있는 추세이다. 국내 최초로 자연 판막에 발생한 아스페르길루스 심내막염을 심초음파 검사 및 수술 조직을 통해 진단하였고, 이에 대해 문헌 고찰과 함께 보고하는 바이다. Fungal endocarditis is a rare but poor-prognostic disease. It typically occurs in patients with several predisposing factors such as open heart surgery, long term venous catheterization, antibiotic therapy, intravenous drug abuse, hematologic malignancy and AIDS. We report a case of native endocarditis caused by Aspergillus fumigatus, which has not been reported as a causative organism of native valve endocarditis in Korea. A 47 year-old female patients without significant past medical history except pulmonary tuberculosis was admitted because of headache and neck pain. After admission, she developed high feve, new cardiac murmur and signs of multiple systemic embolization. Echocardiography revealed large mobile vegetations. Emergent mitral valve replacement was performed and Aspergillus fumigatus was isolated from the resected vegetation. Despite postoperative amphotericin B therapy, she died of subarachnoidal hemorrhage.

산업보건관리자를 위한 소음성 난청 예방지침서의 개발

이원철,유경혜,장성실,이세훈,구정완,김현욱,노영만,이경재,김형아 가톨릭 대학 산업의학 쎈타 산업의학연구소 1996 韓國의 産業醫學 Vol.35 No.1

Occupational hearing loss became the leading occupational disease by constioution 56% of all work-related diseases in Korea. However, the prevalance rates showed wide variations among the specific medical examination providers and were very low(0.8-1.4%) compared with those 8.4% in Japan. The sources of these variations was regarded in the preview study as 1) Employee audometric estings were primarily conducted by nurses and nurse-aids who had no formal training for audiometry; 2) althought audiometric testing equipment used by the spedific medical examination providers, it should be periodically calibrated, a significant number of them were not properly calibrated : 3) Initial audiometric testings were conducted at any available spaces in workplace or at the testing room without considering bachground noise level. One of solutions that can be done for sloving surrent noise related problems is to provide a noise related manual for the occupational health managers including doctors, nurses and hyginests. This study was done to provide such a manual. The main core of the manual was hearing conservation program. And the contents of the manual was the same as the main frame of hearing conservation program such as noise survey, provided of the diagram showing the core contents of each factor of the hearing conservation program. Hopefully, this manual will be the references of the standardized performances of the specific medical examination providers.

學習曲線을 利用한 人間信賴性 硏究

임완희,박석환,정운 대구대학교 산업기술연구소 1994 産業技術硏究 Vol.13 No.-

Safety aspect in the manufacturing facility or construction site is increasingly emphasized in Korea for last a decade. As a result, the number of industrial accident is decreased slowly through organizational efforts. For reduction of industrial accidents, we must increase the reliability of both the equipment and human performance. This paper proposes a mathematical model to estimate and predict the human error rate correspondong to the worker's job experience. For this purpose, we used the statistics of industrial accidents issued by the Department of Labor in the year of 90-92. The methodology developed in this research will provide a basis for better cost estimation in planning labor policy in the early stage of a project. We believe that this effort would eventually lead to a basis for a new approach to the safety planning.