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이승구,송석환,이주엽,문창윤,오재찬 대한골절학회 2003 대한골절학회지 Vol.16 No.2
목적 : 수부의 중수지 관절 탈구의 관혈적 정복이 필요했던 예에서는 정복을 방해하는 구조물에 대해 분석하고 도수 정복이 가능했던 예에서는 성별 및 탈구 형태에 따른 특성에 대해 알아보고자 하였다. 대상 및 방법 : 총 27예의 수부 중수지 관절 탁구 환자 (무지 11예, 이지 14예, 소지 2예)를 대상으로 연구하였다. 탈구된 중수지 관절의 정복을 방해하는 해부학적 구조는 수술시에 확인을 하였으며, 도수 정복이 가능하였던 예들에서도 연령과 손상된 구조물, 그리고 최종적인 임상 결과를 평균 7개월간 추시 관찰하였다. 결과 : 무지 중수지 관절의 탈구 11예 중 파열된 전방 관절낭, 수장판과 단무지 굴건의 파열을 동반한 복합 탈구가 8예 있어 관혈 정복을 시행하였으며, 2예에서만 도수 정복이 가능하였다. 관절염이 있던 1예는 관절 유합술을 시행하였다. 다른 수지의 중수지 관절의 탈구는 Kaplan의 개념에 따라 탈구를 수술 정복하였고 파열된 수장판을 복원하였으며, 1예에서 수술시 표재 중수 횡인대만의 절개와 이완으로 정복할 수 있었다. 소지 중수지 관절 탈구의 2예에서 파열된 요측 측부인대가 수술시 관찰되었고 이를 복원하여 수지의 불안정성을 예방하였다. 이들의 최종 결과는 특별한 운동 제한이나 불안정성 없이 좋은 결과를 보였다. 결론 : 적절한 국소 마취하에 도수 정복을 1~2회 시행할 수 있지만 단순 정복이 가능한 탈구가 부적절한 견인으로 정복이 불가능한 복합 탈구로 진행할 수 있다. 그리고 복합 탈구는 대부분 관혈적 정복이 필요하기 때문에, 정복 방해 구조물에 대한 충분한 이해와 적절한 조치가 필요하다. Purpose : To analyse the obstacles to prevent the reduction for dislocation of the metacarpophalangeal (MP) joints of the hand and evaluate the relationship between the sex and dislocation type in closed reduction case. Materials and Methods : Total 27 cases of MP joint dislocation of the hand (11 cases of thumb, and 14 index and 2 little finger) were reviewed retrospectively. The anatomical structures to prevent the reduction were confirmed at operation and the cases which were reduced immediately were also analysed for their ages and differences of damaged structures, and finally their complications or outcome were reviewed for average 7 months after reduction. Results : In 11 cases of thumb MP joint dislocations, the complex dorsal dislocations in which the protruded metacarpal neck was caught by buttonhole of torn anterior joint capsule, volar plate and FPB were reduced by open method in 8 cases, and closed reduction was done in 2 cases but one old case required arthrodesis. In other finger MP joint dislocations, the Kaplan's concept to prevent the reduction was confirmed. But reduction of torn volar plate and incision of transverse metacarpal ligament were sufficient to reduce the dislocation with gentle longitudinal traction during the operation. In two cases of little finger MP joint dislocation, the ruptured radial collateral ligaments were noted after open reduction and it must the repaired to prevent the finger instability later. Their overall end results were good without any significant restriction of MP joints motions and finger instabilities. Conclusion : One or two times of closed reduction with proper local anesthesia could be tried, but simple reducible dislocation can be converted to complex irreducible ones by the inappropriate traction method, and so proper reduction technique by closed or even in open way is important with the knowledge of anatomical obstacles to prevent the reduction of the metacarpophalangeal joints.
김종부,신명국,성낙환,최문정,김경주,이동석 강원대학교 산업기술연구소 2000 産業技術硏究 Vol.20 No.A
This experiment was done to investigate the leaching and adsorption properties of heavy metals on porphyry. The comparison with respect to the leachability of heavy metals from porphyry between the Korea Standard Leaching Test (KSLT) and the Toxicity Characteristic Leaching Procedure (TCLP) was carried out. The fractional composition of leachate and the total concentration of heavy metal of porphyry were studied through Sequential Extraction Procedure (SEP) and EPA Method 3050. Adsorption experiment of porphyry has pointed out that the optimum dosage of porphyry for 50ppm Pb was over 10g/L, the effective particle size for absorption was below 200 mesh and the optimum pH was about 7. From the Freundlich' adsorption equation, l/n was 1.0722, and k was 0.0041. After adsorption, the fractional composition of Pb was changed. The exchangeable, carbonate, reducible fractions were increased, and the organic fraction was not changed, and the residual fraction was decreased.
Mutational Analysis of the Tumor Suppressor WTX Gene in Non-small Cell Lung Cancer
Moon, Seok Whan,Chung, Yeun Jun,Yoo, Nam Jin,Kim, Min Sung,Lee, Sug Hyung 대한폐암연구회 2008 Journal of Lung Cancer Vol.7 No.1
Purpose: In a recent study of Wilms' tumors, a new X chromosome gene, Wilms' tumor gene on the X chromosome (WTX), was discovered that was found to harbor small deletions and point mutations. The WTX protein negatively regulates Wnt/β-catenin signaling, and is considered to be a tumor suppressor gene. One of the questions about the WTX gene is whether the genetic alterations of the WTX gene are specific only to Wilms' tumors. The aim of this study was to explore whether the WTX gene mutation is a characteristic of human non-small cell lung cancer (NSCLC). Materials and Methods: In the current study, we analyzed the part of the WTX gene encoding the N-terminal of WTX, where most of the WTX point mutations have been detected in Wilms' tumors. Forty-eight NSCLC tissues were analyzed by a single-strand conformation polymorphism assay and DNA sequencing. Results: SSCP analysis revealed no evidence of somatic mutations in the DNA sequences encoding the N-terminal of the WTX gene in the 48 NSCLC tissues. Conclusion: The data presented here indicate that the WTX gene may not be somatically-mutated in human NSCLCs, and suggest that NSCLCs may not utilize mutational events of the WTX gene in the process of pathogenesis.
Effect if Indomethacin and Colchicine on Paraquat Induced Pulmonary Toxicities in Rat
Moon, Seok Whan,Kwack, Moon Sub,Kim, Se Wha,Lee, Hong Kyun CATHOLIC MEDICAL CENTER 1991 Bulletin of the Clinical Research Institute Vol.19 No.1
Paraquat, a widely used herbicide, is known as a pneumotoxin and causes dose-dependent lung injuries resulting in a sequence of pathologic changes that resemble adult respiratiory distress syndrome. Paraquat induced pulmonary toxicities in rat lungs are thought to result from its specific accumulation in lung tissue and direct cytotoxic effects on alveolar epithelium. Acute paraquat induced lung injury is mainly caused by prostaglandin and polymorphonuclear leukocyte. Indomethacin is a potent inhibitor of prostaglandin synthesis and colchicine inhibits acute inflammation such as a gout by inhibiting migration of polymorphonuclear leukocytes. In order to evaluate the effects of indomethacin and colchicine on paraquat-induced pulmonary toxicities. Four groups of rats (n=80) weighing about 100 gm were studied: In group Ⅰ, as a control (n=20) normal saline was injected intramuscularly for 14 days; in gorup Ⅱ(n=20), paraquat (10 mg/kg/d) was simultaneously injected for 3 days and for group Ⅲ & Ⅳ in the same manners; in group Ⅲ (n=20), indomethacin (2 mg/kg/day) was injected intramuscularly after paraquat injection for 14 days; in group Ⅳ (n=20), colchicine (20 ㎍/rat/day) was provided as drinking water to paraquat exposed rats for 14 days. The lungs of rats all were sacrificed 14 days later and were examined for evaluation for toxicities and histologic effects. Indomethacin or colchicine treatment in paraquat exposed rats ameliorated toxic effects of paraquat: In indomethacin treated group, lesser 1ethalily and lesser reduction of body weight were observed and lesser ratio of lung wet-to-dry weight suggesting lesser degree of pulmonary edema were revealed in correlation with mild destruction of lung architecture. And in colchicine treated group were toxic and histologic findings observed like indomethacin treatment. The clear difference between colchine and indomethacine were not observed but in septal thickness was lesser in colchcine group. We concluded that paraquat induced pulmonary toxicities could be prevented with indomethacin and colchicine by inhibiting prostaglandin synthesis and transcelluar migration respectively.
정속도 유도형 풍력발전기의 계통연계 운전 중 계통사고 발생에 대한 시뮬레이션
고석환(Seok-Whan Ko),장문석(Moon-Seok Jang) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
This study suggests a modeling of grid-connected wind turbine generation system that has induction generator, and aims to perform simulations for outputs by the variation of actual wind speed and for fault current of wind generation system. MATLAB & SIMULINK implemented modeling of grid-connected wind turbine generation system.