구후차단을 이용한 백내장수술시 진정 목적으로 사용한 Midazolam 과 Midazolam-Ketamine 의 비교

김진수,박종완,김일호,한찬수,김천숙,김유재,안기량 대한마취과학회 1998 Korean Journal of Anesthesiology Vol.34 No.6

Background : Many ophthalmic procedures can be performed using a retrobulbar regional anesthetic technique. However, retrobulbar block is painful and most of patients express anxiety about the procedure. In addition, several life-threatening complications may occur. We compared the effects of midazolam and midazolam-ketamine as a sedative during retrobulbar block in cataract surgery. Methods : Thirty patients undergoing cataract surgery were randomly allocated into two groups, group I(n=15) was received midazolam and group II(n=15), midazolam-ketamine. Mean arterial pressure(MAP), heart rate(HR), and peripheral oxygen saturation(SpO2) were compared before administration of drugs and 1, 2, 3, 4, 5, 10, 20, and 30 min after administration of drugs. Patients' movement requiring restraint were also checked. In the recovery room, postoperative nausea and vomiting, recall, delirium and/or hallucinations, and ocular complications were recorded. Results : There were no significant differences in MAP and SpO2 between groups but heart rates were significantly increased at 1, 2, 3, 4, and 5 min than baseline in group II. Movement score was significantly lower in Group II than in Group I during the block(p<0.05). Recall during performance of the nerve block occured more often in Group I than in Group II(p<0.05). Conclusions : Low-dose midazolam-ketamine sedation sequence was superior to a midazolam technique regarding patients' movement and recall. (Korean J Anesthesiol 1998; 34: 1136∼1143)

설갑상선 : 1 예 보고 A Case Report

한기석,배일헌,차상훈,김성진,박길선 충북대학교 의과대학 충북대학교 의학연구소 2003 忠北醫大學術誌 Vol.13 No.2

갑상선 조직 전체가 설기저부에 발생한 이소성 설갑상선 증례를 경험하였기에 그 방사선학적 소견을 문헌고찰과 함께 보고하고자 한다. 증례는 59세 여자 환자로 40 일전부터 발생한 음성 변화를 주소로 내원하였다. 이학적 검사에서 설 기지부 중앙에 회백색의 격막에 둘러 쌓인 3 cm 가량의 종괴가 있었으며, 종괴는 내장으로 돌출하여 구인두를 막고 있었다. 경부 전산화 단층촬영 측면 정찰 촬영에서, 설 기저부에 후방으로 돌출하여 구인두를 막고 있는 경계가 분명한 연부조직 종괴가 보였으며, 전산화 단층촬영 동맥기와 정맥기에 주변의 혈관과 비슷한 강하고 균일한 조영증강을 보이는 장경 2.5 cm의 원형 종괴가 있었다. 또한 갑상선이 있어야 할 경부 전방 공간에서 정상 갑상선 조직은 전혀 보이지 않았다. 설 기저부의 종괴에서 생검을 시행하였으며 병리 검사에서 갑상선 조직으로 진단되어 설갑상선으로 확진되었다. The authors report a case of ectopic thyroid that whole thyroid tissue was replaced by lingual thyroid. A 59-year-old female presented with dysphonia duration of 40 days. On physical examination, there was a 3 cm sized well encapsulated whitish mass protruding to oral cavity in milline of tongue to base. Computerized tomography of neck revealed homogeneously enhancing well marginated 2.5 cm sized round mass in the cecum of tongue base on arterial and venous phase. And there was no normal thyroid gland in lower anterior neck.

Carbonyl 화합물에 대한 Trimethyl-Silylcyanide의 첨가 반응

한완수,박철영,이일규 中央大學校 自然科學硏究所 1988 自然科學硏究所 論文集 Vol.2 No.-

Trimethylsilylcyanide is found to be a good reagent for the formation fo trimethylsilylcyanohydrin ethers from the direct reaction with carbonyl compounds. To obtain organic cyanoderivatives, trimethylsilylcyanide was addes to vbarious carbonyl compounds (acetaldehyde, acetone, cyclohexanone, propiophenone, benzophenone) in the presence of Lewis acid catalysts at room temperature. Addition of small amounts of Lewis acid catalysts to the reactions increased the yields of trimethylsilylcyanide carbonyl addition products. The results of these reactions indicated that the yields in trimethylsilycyanide addition reaction to the highly hindered carbonyl compounds were affected by the nature of catalysts employed, and increased as below. AlCl₃>SnCl₄≫ZnCl₂

고배속 광디스크 드라이브를 위한 수정된 구조를 가진 외란 관측기

김일한(II Han Kim),김홍록(Hong Rok Kim),최영진(Young Jin Choi),서일홍(II Hong Suh),정완규(Wan Kyun Chung),박명관(Myoung Kwan Park) 대한전기학회 2002 대한전기학회 학술대회 논문집 Vol.2002 No.7

야전데이터를 활용한 무기체계 신뢰성 평가: K계열 무기체계 사례 중심

정일한 ( Ii Han Chung ),이학용 ( Hag Yong Lee ),박영일 ( Young Ii Park ) 한국품질경영학회 2012 품질경영학회지 Vol.40 No.3

Purpose: Weapon systems have the long life cycle unlike the consumer product. Thus, the reliability of weapon system is improved during the life cycle through the steady technical change. In this paper, we deal with the method of evaluating the reliability of weapon system with the field failure data. Methods: Especially, we present how to gather the field failure data and evaluate the reliability through the case of K-series weapon system, To evaluate reliability, the reliability growth model is used and the result is discussed, Results: It is steadily improved the reliability of K-series weapon system deployed from 2000 to 2004, The frequency of the failures that affect the mission is largely reduced and MTBMF (mean time between mission failure) is also improved. Conclusion: We can guess the trend of the reliability of weapon system with the field data through this study. Furthermore, it can be used to improve the reliability and make maintenance policy.

Prediction of fracture behavior in hole expansion test using microstructure based dual-scale model

Park, Siwook,Jung, Jinwook,Kim, Sung II,Seo, Seok-Jong,Lee, Myoung-Gyu,Han, Heung Nam Institute of Physics Publishing Ltd 2018 Journal of Physics: Conference Series Vol.1063 No.-

網膜母細胞腫에 對하여

韓洪株,朴秉日 大韓眼科學會 1970 大韓眼科學會雜誌 Vol.11 No.4

수지 첨부 재접합술시 출혈요법 기간의 비교 관찰

한승규,서의석,박 현,윤을식,이병일,김우경 大韓成形外科學會 2000 Archives of Plastic Surgery Vol.27 No.2

To overcome venous congestion in fingertip replantation, we have used "salvage procedure" which consists of continuous external bleeding via a stab incision on paraungal area and dripping of heparinized saline solution at the incision site to maintain external bleeding. As this method requires continuous bleeding for a certain period of time, it may be a great burden for patients, therefore it is most important to minimize the duration of bleeding for patients. Many authors have studied on the new venous channel formation of the flap. However, to our knowledge a study on the new vascular connection in fingertip replantation has not yet been carried out. Between January of 1994 to August of 1999, we performed replantations for 60 fingers in 59 patients using our salvage procedure in the Korea University Guro Hospital. Among 60 cases, 49 cases were survived including partial necrosis. We reviewed medical records of these 49 cases retrospectively. We compared and analyzed the period of external bleeding according to sex, age, level, cause of amputation, and the type of injury. The average period of the salvage procedure was 8.4 days. 6.0 days was required for the patients under the age of 10, and 7.6 days for the teens, which were the shortest salvage period groups. Based on the types of injuries, it is shorter in guillotine injury group (6.9 days) than in crush (9.0 days) or avulsion (8.7 days) groups. On the other hand, the sex and level of injury did not show much difference in the duration of the procedure.

이십년간의 수술 마취 관리의 변천

한성민,조옥현,박평환,곽일용,이건일 대한마취과학회 1980 Korean Journal of Anesthesiology Vol.13 No.1

The anesthetic experience in 20 years was evaluated by statistically analyzing the total of 17,595 cases which were performed at S.N.U.H. from 1960 through 1979 according to age, sex, anesthetic agents and methods. To simplify the analysis, the authors selected the anesthetic cases of 1960, 1965, 1970, 1975, and 1978. The results were as follows: 1) General anesthesia has been used with increasing frequencies and local anesthesia with decreasing frequencies during the period. 2) More than half of the totaI cases were performed for the patients in their second or third decades. 3) General surgery cases were the majority of the total. 4) The usage of halothane has been increased evei since its introduction into clinical anesthesia in this hospital. 5) For intravenous induction, thiopental has been used as the main agent, and succinylcholine and pancuronium as the major musce relaxants since 1975. 6) For anesthetic technique, semiclosed circle absorption system has been employed in almost all cases, and non-rebreathing system has been used recently with increasing frequencies in pediatric anesthesia.

노면표시 재귀반사 성능 특성 연구

한음 ( Han Eum ),윤일수 ( Yun Ii-soo ),김다희 ( Kim Da-hee ),박성호 ( Park Sung-ho ),김예진 ( Kim Ye-jin ) 한국도로교통공단 2022 교통안전연구 Vol.41 No.1

본 연구는 노면표시에 사용되는 도료와 유리알의 종류에 따른 선, 기호, 문자 등 노면표시 요소의 시간 경과에 따른 재귀반사 성능의 감소 정도를 조사하였다. 노면표시의 재귀반사 성능 감소 효과를 객관적으로 분석할 수 있도록 재귀반사 성능 변화 데이터를 구축하는 실험과 함께 주간 운전자의 시인성을 나타내는 시감(視感) 비교를 통해 시각적인 변화를 관찰하였다. 이를 바탕으로 페인트 종류, 시공 방법, 노면표시 종류, 교통량 등의 재료 및 도로환경 요인에 의해 재귀반사 성능이 어떻게 감소하는지 회귀분석을 통해 살펴보았다. 본 연구의 결과를 통해 사용된 도료와 유리알의 종류별로 재귀반사 성능 저하 추이를 반영하여 재도색 시기를 계획하는 단계에서 노면표시 유지관리에 도움이 될 것으로 판단된다. This study investigated the postconstruction reduction in retroreflective performance over time for different painted road markings, including lines, symbols, and characters. Visual changes were observed via an experiment. We collected data on changes in reflexive performance to objectively analyze the effect of reduced reflexive performance of road markings. Based on this data, we then examined reductions in recursive reflection performance due to factors such as paint type, construction method, road marking type, and traffic and road environment. Taken together, the results of this study suggest that it will be helpful to maintain road markings during the planning stage of the repainting period and to better understand recursive reflection performance deterioration trends for each type of paint and glass grain used.