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PVC 대체 재료로서 SBS 재료의 자동차 부품 적용에 관한 연구
조 성훈(S.H.Cho),김학철(H.C.Kim),김효경(H.K.Kim),하종배(J.B.Ha) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.11_2
The selection of the plastics material for the automotive parts is very important step because it should be considered the all factors from the weight down. cost reduction. quality improvement at the application step to the recyclability at the disposal step. Nowadays. the material trend of the automotive parts is enlarging the amount of the environment-friendly material and using the environmentally harzadous materials such as PVC is being restricted gradually. So. in this study. some automotive parts are selected. and PP/SBS blend material is developed with considering the requirements for the each part as PVC replacing material.
만성 B형 간염 바이러스를 보유한 젊은 남자에서 간손상, 혈청 HBV-DNA 및 간세포내 HBcAg의 발현 양상과의 관련성
김태현 ( Tae Hyeon Kim ),김용성 ( Yong Sung Kim ),염주진 ( Joo Jin Yeom ),조은영 ( Eun Young Cho ),김희식 ( Hee Sik Kim ),김학철 ( Haak Cheoul Kim ),박도심 ( Do Shim Park ),조지현 ( Ji Heun Cho ),윤기중 ( Gi Jung Yoon ),문형배 ( H 대한소화기학회 2004 대한소화기학회지 Vol.44 No.2
Background/Aims: Although the viral load is correlated with HBcAg, liver injury was not correlated to viral load in HBeAg positive patient. We aimed to study the inter-relationship of clinical parameters such as the level of HBV-DNA, the level of aminotra
Halothane 마취후 발생한 간괴사 13예의 임상적 고찰
이용구(Y K Lee),김학철(H C Kim),조원섭(W S Cho),조정구(C G Cho) 대한소화기학회 1987 대한소화기학회지 Vol.19 No.1
N/A There were many controversies concerning halothane-induced hepatitis, but a few cases suggest there was clinical, historical, biochemical, immunologial and epidermiological evidence to support theory of halothane induced hepatitis. We described 13 cases who had otherwise unexplained hepatitis after halothane anesthesia. The clinical features and complications were similar to those of any other severe hepatitis, but some differences were noticed. We obtained the results as followings; 1) The most common clinical symptom was high fever, which was noticed in 12 of the 13 cases, and it occurred between the 4th to 16th postoperative day, and its duration was variable, but ranging from 3 to 10 days. 2) The other clinical symptoms were non-specific G-I symptoms, myalgia, headache, easy fatigue and jaundice. And constitiutional prodromal symptoms were developed during or after the post-febrile period, but gradually subsided after the onset of clinical jaundice. 3) Abnormal laboratory findings, espicially AST and ALT, showed a variable increase during the onset of the febrile period or at its conclusion. The peak levels of serum aminotransferases were noticed at the end of febrile period, or the post-febrile period and they gradually normalized after 3 to 6 weeks in the most of the cases. 4) The relative frequency of the unexplained hepatitis was observed as follows; in the 13 cases; above the umbilicus of the operaive site (9), hypotension during operation (8), previous history of surgery under general anesthesia (4), obesity (5). And the fatality rate was 15.1% (2), these two cases showed a prolongation of the prothrombin time 8 seconds over the normal control time.
최창수 ( Chang Soo Choi ),서검석 ( Geom Seog Seo ),조은영 ( Eun Young Cho ),김기훈 ( Ki Hoon Kim ),서승오 ( Sung O Seo ),오효정 ( Hyo Jeong Oh ),신새론 ( Sae Ron Shin ),김태현 ( Tae Hyeon Kim ),최석채 ( Suck Chei Choi ),김학철 ( H 대한내과학회 2008 대한내과학회지 Vol.75 No.1
목적: 최근 간농양에 대한 보고는 원인적 균주의 변화나 기저 질환의 분류에 따른 특징에 대한 내용이 대부분으로, 감염경로의 원인적 분류에 따른 임상양상 및 경과, 농양의 특징, 균주, 동반질환 등의 차이에 대해 알아보고자 하였다. 방법: 2004년1월부터 2006년 11월까지 병원에 내원하여 화농간농양을 진단받은 118명의 환자의 대상으로 임상양상, 방사선학적 소견, 치료, 예후 등을 비교하였다. 결과: 화농성 간농양 118명의 환자 중 담관군은 56예, 원발군은 62예였고, 담관군에서 평균 연령이 67.6세로 원발군의 59.9세에 비해 의미있게 높았다. 증상 및 징후에서 대부분에서 두 군의 차이는 없었으나, 담관군에서 황달의 빈도가 유의하게 높았다(p=0.02). 기저 질환으로 간경변이 담관군에서 높았다. 농양강의 특징에서 담관군에서 다발성 농양의 빈도가 높은 경향을 보였으며, 농양강의 크기가 의미있게 작았다(p=0.02). 원인균은 두 군에서 모두 K. pneumonia가 가장 많이 검출되었고, 담관군에서 상대적으로 E. coli의 검출이 유의하게 높았다. 간농양의 치료는 담관군에서 항생제 단독치료가 유의하게 많았고, 원발군에서 배액치료와 항생제 병용 치료가 유의하게 많았다(p<0.01). 합병증은 두 군간의 차이는 없었고, 사망은 담관군에서 유의하게 높았다 (p=0.04). 결론: 담관군은 고령이며, 황달의 발생이 높고, 농양의 크기, 기저질환, 원인균 및 치료적 측면, 사망률 등이 원발군과 유의한 차이를 보였다. 이는 향후 대규모 전향적 연구를 통한 평가가 필요할 것으로 생각된다. Background/Aims: The aim of this study was to evaluate the clinical features, radiologic findings, treatment modalities, and outcomes based on the origin of infection in patients with pyogenic liver abscesses. Methods: We retrospectively analysed the medical records of 118 patients who were treated for pyogenic liver abscesses between January 2004 and December 2006. Of the 118 patients, 56 patients had biliary risk factors. Results: The clinical characteristics were similar between the two groups, but the biliary risk group was characterized by an older age and the presence of jaundice. The size of the abscess was smaller in the group with biliary risk factors than in the cryptogenic group (p=0.02). Klebsiella pneumonia was the most common organism overall; however, Escherichia coli was more prevalent in the biliary risk group than in the cryptogenic group (p=0.03). Comparing the treatment modalities between the two groups, antibiotic therapy alone was more frequently used in the biliary group (p<0.01). The death rate was higher in the biliary group than in the non-biliary group (7.1 vs. 0.0%, p=0.04). The higher death rate in the biliary group was associated with multi-organ failure, absence of biliary drainage, and underlying diseases. Conclusions: There were differences between the two groups with respect to the size of the abscess, patient age, cultured organisms, and treatment modalities. The death rate was higher in the biliary group than the cryptogenic group. (Korean J Med 75:60-67, 2008)