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정지용,윤나라,강대웅,오종찬,장재현,선길홍,박경희,정종훈,김현리 朝鮮大學校 附設 醫學硏究所 2005 The Medical Journal of Chosun University Vol.30 No.1
Aplastic anemia is a disease characterized by pancytopenia in the peripheral blood and hypocellular bone marrow with the fatty infiltration. The causes of the acquired aplastic anemia were usually related to drugs and immune-related diseases. A 34-years old man was admitted due to general weakness. He has been going hemodialysis for 2 years because of end stage renal disease (ESRD) due to chronic glomerulonephritis. At admission, laboratory tests showed hemoglobin 6.2 g/dL, hematocrit 18.0 %, WBC 5,710mm (neutrophil 71.8%, lymphocyte 19.1%, monocyte 5.9%), reticulocyte 1.9%, platelet 93,000/mm, Fe 12.8 ug/dL, TIBC 204 ug/dL, ferritin 941.47 ng /ml, haptoglobin 0.72 g/L, vitamin B12 508.17 pmol/L, folate 24 ng/mL, total protein 6.54 g/dL, albumin 3.76 g/dL, Alk. pohsphatase 79 IU/L, AST 30.0 IU/L, ALT 39.7 IU/L, total bilirubin 0.57 mg/dl, BUN 79.4 mg/dl and creatinine 10.18 mg/dl. Peripheral blood smear showed the normocytic normochromic anemia with anisocytosis. Anemia was diagnosed but it was irresponsive to the recombinant human erythropoietin (EPO) and blood transfusion. In the bone marrow aspiration smear were there the hypoplastic myeloid and erythroid precursors. The bone marrow biopsy section showed the hypoplasia of all components (10-20%) and the fatty infiltration. We have experienced one case of the idiopathic aplastic anemia in a patient going through hemodialysis and we just report it with documentary records. 저자들은 혈액 투석 중인 환자에서 약물, 면역계 이상등의 원인을 발견할 수 없었음에도 재생 불량성 빈혈이 발생한 1예를 경험하여 문헌 고찰과 함께 보고하는 바이다.
선택적 버퍼링을 이용한 MPEG 비디오 스트림 다중화 기법
허정석,윤상호,김명균 울산대학교 2000 공학연구논문집 Vol.31 No.1
ATM 망에서 MPEG 비디오 스트림은 CBR과 VBR 서비스를 이용하여 전송한다. 그러나 MPEG 스트림 트래픽은 시간에 따라 크게 변하는 특성을 가지고 있어 대역폭을 낭비하지 않고 효율적으로 전송하는 것은 매우 어렵다. 지금까지 하나의 MPEG 비디오 스트림의 트래픽 특서 및 제어에 대한 연구는 많은 연구자들에 의해 이루어져 왔지만 여러 개의 MPEG비디오 스트림이 다중화기에 의해 다중화된 트래픽의 특성 및 제어에 대한 연구는 이루어지지 않았다. 본 연구에서는 이러한 다중화기에 의해 다중화된 프래픽의 가변성 및 최대 셀 전송률을 줄이기 위한 다중화 방법을 제안한다. 다중화 트래픽의 최대 셀 전송률을 줄임으로써 이러한 트래픽을 가능한 대역폭의 낭비를 줄이면서 효율적으로 전송할 수 있게 된다. On ATM networks, MPEG videl stream is transferred using CBR or VBR services. But, because the MPEG video traffic varies greatly from time to time, it is very difficult to transfer the MPEG stream efficiently without loss of transmission bandwidth. Until now, the study on the traffic analysis and control on a single MPEG videl stream has been done by many researchers, but the trafic analysis and control on a multiplexed traffic of multiple MPEG video streams has not been studied by any researcher. This paper proposes a multiplexing method to reduce the PCR and traffic variance of a multiplexed traffic of multiple MPEG video streams. By reducing the PCR of the multiplexed traffic, the multiplexed VBR traffic can be transferred efficiently with less loss of transmission bandwidth.
복식자궁전적출술과 인공슬관절 치환술 환자에서 정맥내 자가통증조절이 수술 후 진통에 미치는 효과
최영균,남현옥,이정한,이근무,정순호,김영재,신치만 白中央醫療院 2005 仁濟醫學 Vol.26 No.1
Objective: Intravenous patient-controlled analgesia(IV PCA) is gaining wide spread popularity in the management of postoperative pain control. The purpose of this study is to evaluate the severity of pain after TAH and TKRA through comparing visual analogue scale(VAS) of pain of each patients who received identical IV PCA protocol, and to improve our IV PCA protocol. Methods: TAH group includes twenty female patients who were scheduled for TAH. TKRA group includes twenty female patients who were scheduled for TKRA. Each group received fentanyl 50㎍ about 30minutes before the end of surgery, followed by IV PCA with fentanyl 1500 ㎍, ketolorac 300mg, ondansteron 8mg, normal saline 56㎖(total 96ml, basal infusion rate 1㎖/hr, bolus dose 1㎖, lockout time 10 minutes). VAS scores were recorded at 1, 6, 12, 24, 48 hours postoperatively. Total bolus doses and patients' satisfaction were checked after the end of analgesia. Results: VAS scores of TKRA group were significantly higher than those of TAH group at 12, 24, 48 hours postoperatively. VAS scores of both group progressively decreased(P<0.05). Patients' satisfaction score showed no significant difference between two groups. Total bolus dose of TKRA group was significantly higher than that of TAH. Conclusion: The postoperative pain of TKRA was more severe than that of TAH. TKRA group needed more profound postoperative pain control than TAH group. We should consider the increase of early postoperative period analgesic doses to acquire optimal pain control of both group.
Rocuronium의 애별투여방법이 모지내전근의 이완에 미치는 영향
최영균,김승수,이원진,조광래,이상은,김영환,임세훈,이정한,이근무,정순호,김영재,신치만 인제대학교 2009 仁濟醫學 Vol.30 No.-
Objective : There are controversies in pnmmg technique of rocuronium whether it can or can't shorten the onset time. We want to compare the effects of two different priming doses and intervals of rocuronium. Materials and Methods : After giving propofol, 50 patients were randomly assigned to 5 groups. Group I received a placebo, followed 3 min later by rocuronium 0.6 mg/kg. Priming doses and intervals of Group II, Ill, N, V were 0.06 rng/kg and 2 min, 0.12 mg/kg and 2 min, 0.06 rug/kg and 3 min, 0.12 mg/kg and 3 min, respectively. Total dose of rocuronium was 0.6mg/kg. Train of four (TOF) count or ratio and 1st twitch height of TOF (T1) were monitored with 15 secondsintervals. TOF ratio of each groups just before bolus injection, duration for TOF count to reach zero and duration for Tl to reach 95% depression after bolus injection were compared. Results : Duration for TOF count to reach zero and duration for Tl to reach 95% depression after bolus injection were decreased in priming groups compared to Group 1 (P < 0.01) In group V, significant depression of TOF ratio just before bolus injection was seen (P < 0.05). Conclusion : Priming technique with rocuronium is effective method to shorten the onset of neuromuscular block. But priming dose of rocuronium itself could cause hypoxia and aspiration in awake patients and should be used carefully. Priming dose of rocuronium 0.06 mg/kg and 2 minutes interval maybe relatively safe method.
서정세,박영준,권운식 慶尙大學校生産技術硏究所 1998 生産技術硏究所論文集 Vol.14 No.-
In this study, analysis is made for the effects of groove shape on the thermal performance of a axial groove heat pipe. The mathematical models of two-phase flow in grooved heat pipe are presented for the capillary limitation as steady state. Generally, the heat pipe performance depends on the capillary pressure and liquid flow. The friction force of liquid flow through the groove increases with the groove width decreased, and then the capillary pressure is improved in the gas-liquid interface of groove. Therefore, the optimal groove width shape exists for the maximum thermal performance of heat pipe. In this paper, the optimal groove shape and scale are presented by considering both capillary pressure and liquid flow.