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임상연구 : Midazolam 정주 후 Sevoflurane 8%와 N2O에 의한 후두 마스크 삽입에 대한 평가
최주연 ( Ju Yeon Choi ),이귀용 ( Guie Yong Lee ),김동연 ( Dong Yeon Kim ),한종인 ( Jong In Han ),정락경 ( Rack Kyoung Chung ),김치효 ( Chi Hyo Kim ),백희정 ( Hee Jung Baik ),김종학 ( Jong Hak Kim ),이춘희 ( Choon Hi Lee ) 대한마취과학회 2003 Korean Journal of Anesthesiology Vol.45 No.2
B1 보안 등급을 지원하는 운영체제를 위한 보안 관리 시스템의 구현
백기영(Ki-young Baek),하영국(Young-gook Ha),이춘희(Choon-hi Lee),류재철(Jae-cheol Ryou) 한국정보과학회 1997 한국정보과학회 학술발표논문집 Vol.24 No.1A
시스템을 허가 받지 않은 사용자로부터 안전하게 보호하는 것은 시스템 관리의 가장 기본적인 요건 중의 하나이다. 기존의 UNIX 시스템의 경우 관리자는 로그인이나 패스워드 관리, 화일의 암호와 및 복호화, 각종 접근 제어와 프리빌리지 관리, 시스템 감사, 기타 보안 관련 검사 기능 등을 복잡한 명령어들의 조합을 통해서 일일이 관리하여야 하는 불편함을 감수해야만 했다. 본 논문은 DoD(Department of Defense)의 TCSEC(Trusted Computer System Evaluation Criteria)에서 규정한 B1 등급의 판정 기준을 만족하는 Unixware2.0 시스템의 보안 관리 기능들을 GUI 기반의 관리 툴로 구현한 것이다.
브로드캐스팅 트래픽을 최소화한 DHCP 의 설계 및 구현
안성진(Ahn Seong Jin),정진욱(Chung Jin Wook),함영환(Ham Young Hwan),이춘희(Lee Choon Hi),박창순(Park Chang Soon),김해진(Kim Hae Jin) 한국정보처리학회 1996 정보처리학회논문지 Vol.3 No.4
DHCP(dynamic Host Configuration Protocol) is a protocol which dynamically allocates an IP adress and/or host configuration parameters to a host. But because this protocol uses broadcasting for message exchange, if causes heavy traffic and overload on the network. By avoiding unnecessary broadcasting and using a simple and efficient implementation model, we can reduce such heady traffic and overload. We have studied on characteristics of the broadcasting traffic caused by DHCP, and implement the model which can reduce traffic by improving algorithm and unicating messages.
폐절제술시 산소흡입농도에 따른 기관지결찰전 후의 동맥혈 가스치의 변화
이춘희,이귀용,이유정 대한마취과학회 1987 Korean Journal of Anesthesiology Vol.20 No.6
At the Department of Anesthesiology, Ewha Womans University Hospital from June, 1984 to August, 1986, pneumonectomies and lobectomies in 12 patients were performed in the lateral position during two-lung ventilation. 5 patients (group I) were ventilated using a portex endotracheal tube with 50% N_2O and 50% O_2 7 patients (greup Ⅱ),100% 0_2. Analysis of artierial blood gases, mean arterial pressure and heart rates were stdudied. Arterial samples were obtained during the following times: (1) preoperative period, (2) the closed·chest in the lateral position, (3) before the ligation of the bronchus in the open·chest, (4) after the ligation of the bronchus in the open.chest and (5) the postoperative period. The results were as follows : (1) In both groups PaO2, gradually decreased during all periods and was not significant. (2) After the ligation of the bronchus in the open·chest, PaO2 values were 199.1±64.5 mmHg (group I) and 322.7±112.4 mmHg (groupⅡ), There was a significant difference between two groups bout clinical improtance (P $lt; 0.05). We concluded that when pneumonectomy and lobectomy were performed in the lateral position by the use of two·lung ventilation with FiO_2, 0.5 or more, PaO_2 was maintained satisfactorily during the closed and open christ periods.
이춘희,김우미,조명득 대한마취과학회 1982 Korean Journal of Anesthesiology Vol.15 No.2
The authors have had experience with seven cases of acute pulmonary edema. There are many predisposing factors for acute pulmonary edema, namely, left ventricular failure due to cardiac disease or overloading, hypoalbuminemia, pulmonalry capillary endothelial damage from bacterial infections, toxins or irritant gases, rarely central nervous system injuries and pulmonary hypersensitivity reactions. For these presented cases, we believe that overloading, hypoalbuminemia, bile pneumonitis were the causative factors. There are many prevntive measures and treatment for acute pulmonalry edema. We conclude that prompt recognition and attention by the anesthesiologist are the most important preventive measures.
이춘희,예상희,한종인 대한마취과학회 2000 Korean Journal of Anesthesiology Vol.38 No.2
Background : The purpose of this study is to compare the clinical effects of isobaric 0.5% bupivacaine 8 mg and hyperbaric 0.5% bupivacaine 8 mg on sensory and motor block in aged patients under- going spinal anesthesia. Methods : Thirty patients, aged 65 years or more, undergoing orthopedic surgical operation of the lower extremities were randomly assigned to two groups for spinal anesthesia. In the isobaric group (n =15), isobaric 0.5% bupivacaine 8 mg was administered and in the hyperbaric group (n=15), hyperbaric 0.5% bupivacaine 8 mg was administered. We measured the maximal sensory level, the time to maximal sensory block, the duration of sensory block, the time to complete motor block, degree of motor block and hemodynamic variables every 2 minutes for 10 minutes in lateral decubitus position and then every 5 minutes for 20 minutes in supine position after spinal anesthesia. Results : The maximal sensory block level and the duration of sensory block were not significantly different between the two groups. The time to maximal sensory block was significantly shorter in the hyperbaric group than in the is obaric group in both lower extremities. The time to complete motor block was significantly longer in the hyperbaric group than in the isobaric group in the nondependent extremity. Conclusions : These results suggest that isobaric 0.5% bupivacaine 8 mg for spinal anestheisa is more suitable for orthopedic operations requiring rapid and complete motor block than hyperbaric 0.5% bupivacaine 8 mg and that it can be performed in lateral decubitus position with the operating site up. (Korean J Anesthesiol 2000; 38: 314~321)