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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.
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.
수술전 경피적경간문정맥도자술로 국소화한 췌장소도세포비후 1 예
김학철,조정구,정영선 대한내과학회 1987 대한내과학회지 Vol.34 No.1
The pancreatic beta islet cell disorders associated with hyperinsulinism include adenoma and carcinoma, which are unifoca1; and adenomatosis, hyperplasia and nesidioblastosis, which may involve the entire pancrease either focally or diffusely. Methods of preoperative localization of pancreatic islet cell tumors include highly selective arteriography, percutaneous transhepatic portal venous sampling at several sites with radiolimmunoassay of portal venous plasma insulin, computerized tomography, and ultra- sound. A 42-year-old woman with clinical features of fasting hypoglycemia had inappropriately elevated I/G ratio during a prolonged fast. Abdominal CT scan, and angiography failed to demonsrtrated the lesion and resection of 85% of the distal pancrease revealed no evidence of a tumor, but transhepatic portal vein catheterization with radioimmunoassay of regionally sampled portal vein insulin level suggessted the lesion with localized step-up in insulin levels occurred at the tail and body of the pancrease. Pathologic examination of the resected pancrease revealed the findings of focal islet hyperplasia. We believed if the CT, ultrasound and arteriogram failed to visualized the lesion in patient with hyperinsulinism, one should proceed with transhepatic portal vein catheterization.