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여호와 증인 환자에서 산부인과적 무혈 수술의 임상적 고찰
이성욱(S.W. Lee),오일영(I.Y. Oh),서상기(S.G. Seo),반태학(T.H. Ban),박윤희(Y.H. Park),박성철(S.C. Park),한광수(K.S. Hahn) 대한산부인과학회 2000 Obstetrics & Gynecology Science Vol.43 No.5
Objective : Jehovah's Witnesses are members of a religious denomination whose beliefs prohibit the use of blood or blood products. Plasma volume expanders and extracorporeal hemodilution of the patients's own blood are theologically acceptiable. And so we evaluated effectiveness of major operative procedures carried out on Jehovas's Witnesses patients without blood transfusions or blood products. Methods : We retrospectively studied 50 cases of Jehovas's Witnesses who underwent obstetric and gynecologic bloodless surgery from February 1995 to August 1999. No patients recieved any blood or blood products during hospitalizaion. Results : The age distribution of patients was between 9 years and 58 year, average 36.7±8.7 years old. The most common cases for bloodless surgery was Cesarean section. The recombinant human erythropoietin(EPO) was treated in 5 cases of Cesarean section, 2 cases of TAH and 2 cases of ovarian tumor perioperatively. EPO-treated 9 cases were increased postoperative mean Hb levels compared with preoperative mean Hb levels. Histology revealed 9 cases of adenomyosis, 8 cases of leiomyoma, 3 cases of germ cell tumor, 2 cases of ectopic pregnancy, 1 case of CIS, 1 case of Krukenberg tumor, 1 case of epithelial cell tumor, 1 case of hemorrhagic corpus tumor and 1 case of sexcord stromal tumor, total 27 cases. There was no operative death and postoperative morbidities were few. Conclusions : We concluded that if we preformed the surgeries with careful operative techniques and various blood conserving procedures we could do the bloodless surgery of Jehovah's Witnesses with relative safety. But the establishment of a well programmed special medical supports for the Jehovah's Witnesses community will be needed in future.
Full Transient Dynamic Analysis를 이용한 함정용 대형 전동기의 내충격성 평가
이성욱(S. W. Lee),송승관(S. G. Song),김진(J. Kim),빈재구(J. G. Bin),권기영(K. Y. Kweon) 한국동력기계공학회 2009 한국동력기계공학회 학술대회 논문집 Vol.2009 No.11
This study was carried out to evaluate the shock-proof of a large scale motor for the naval vessel using full transient dynamic analysis. Finite element models for main assemblies (motor frame, rotor and stator assembly) were consisted of the tetrahedral solid elements and the equipments which installed in the upper side of the motor were substituted the mass elements. And we also modelled resilient mounts of a motor using the beam elements with appropriate directional stiffness. The analysis was conducted applying directional triple half triangle shock wave to the motor using ANSYS 11. As a result, we could find the motor to satisfy the design criteria of the maximum stress and deformation.