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Sean WL Ho,Keng Thiam Lee 대한정형외과학회 2017 Clinics in Orthopedic Surgery Vol.9 No.4
The EndoButton is a commonly used device for femoral fixation of anterior cruciate ligament grafts. Complications from its usage remain rare. Incorrect femoral tunnel placement may increase the risk of intra-articular displacement of the EndoButton. We present a case of anterior femoral tunnel placement resulting in intra-articular displacement of the EndoButton after failure. A 24-yearold man presented to us after failure of anterior cruciate ligament reconstruction performed 3 years prior. Radiographs revealed an intra-articular displacement of the EndoButton. Intraoperatively, it was noted that the femoral tunnel exit was within the suprapatellar pouch, with the displaced EndoButton lodged between the posterior aspect of the lateral tibial plateau and the capsule. Intra-articular displacement of the EndoButton is a rare complication and has only been reported twice in the literature. Anterior placement of the femoral tunnel may predispose patients to this complication and it is recommended to check the EndoButton position intraoperatively to avoid such a complication, especially for the unexperienced surgeon.
Numerical Investigation of Pressure Fluctuation Reducing in Draft Tube of Francis Turbines
Li, WF,Feng, JJ,Wu, H,Lu, JL,Liao, WL,Luo, XQ Korean Society for Fluid machinery 2015 International journal of fluid machinery and syste Vol.8 No.3
For a prototype turbine operating under part load conditions, the turbine output is fluctuating strongly, leading to the power station incapable of connecting to the grid. The field test of the prototype turbine shows that the main reason is the resonance between the draft tube vortex frequency and the generator natural vibration frequency. In order to reduce the fluctuation of power output, different measures including the air admission, water admission and adding flow deflectors in the draft tube are put forward. CFD method is adopted to simulate the three-dimensional unsteady flow in the Francis turbine, to calculate pressure fluctuations in draft tube under three schemes and to compare with the field test result of the prototype turbine. Calculation results show that all the three measures can reduce the pressure pulsation amplitude in the draft tube. The method of water supply and adding flow deflector both can effectively change the frequency and avoid resonance, thus solving the output fluctuation problem. However, the method of air admission could not change the pressure fluctuation frequency.
( Sean Wy Lee ),( Clara Lee Ying Ngoh ),( Horng Ruey Chua ),( Sabrina Haroon ),( Weng Kin Wong ),( Evan Jc Lee ),( Titus Wl Lau ),( Sunil Sethi ),( Boon Wee Teo ) 대한신장학회 2019 Kidney Research and Clinical Practice Vol.38 No.1
Background: Chronic kidney disease (CKD) is associated with fluid retention, which increases total body water (TBW) and leads to changes in intracellular water (ICW) and extracellular water (ECW). This complicates accurate assessments of body composition. Analysis of bioelectrical impedance may improve the accuracy of evaluation in CKD patients and multiple machines and technologies are available. We compared body composition by bioimpedance spectroscopy (BIS) against multi-frequency bioimpedance analysis (BIA) in a multi-ethnic Asian population of stable, non-dialysis CKD patients. Methods: We recruited 98 stable CKD patients comprising 54.1% men and 70.4% Chinese, 9.2% Malay, 13.3% Indian, and 8.2% other ethnicities. Stability was defined as no variation in serum creatinine > 20% over three months. Patients underwent BIS analyses using a Fresenius body composition monitor, while BIA analyses employed a Bodystat Quadscan 4000. Results: Mean TBW values by BIS and BIA were 33.6 ± 7.2 L and 38.3 ± 7.4 L; mean ECW values were 15.8 ± 3.2 L and 16.9 ± 2.7 L; and mean ICW values were 17.9 ± 4.3 L and 21.0 ± 4.9 L, respectively. Mean differences for TBW were 4.6 ± 1.9 L (P < 0.001), for ECW they were 1.2 ± 0.5 L (P < 0.001), and for ICW they were 3.2 ±1.8 L (P < 0.001). BIA and BIS measurements were highly correlated: TBW r = 0.970, ECW r = 0.994, and ICW r = 0.926. Compared with BIA, BIS assessments of fluid overload appeared to be more associated with biochemical and clinical indicators. Conclusion: Although both BIA and BIS can be used for body water assessment, clinicians should be aware of biases that exist between bioimpedance techniques. The values of body water assessments in our study were higher in BIA than in BIS. Ethnicity, sex, body mass index, and estimated glomerular filtration rate were associated with these biases.
신한수(HS Shin),김승욱(SW Kim),남상익(SI Nam),장윤석(YS Chang),고응린(WL Ko) 대한산부인과학회 1966 Obstetrics & Gynecology Science Vol.9 No.5
우리나라에서 자궁내피임장치에 대한 임상연구가 시작된지 3년여 되었다. 이 연구사업은 대한가족계획협회의 주관하에 1962년 9월에 최초로 시작되었는데 처음에는 2개 의과대학 부속병원과 선교회 이동진료반에서 착수하였다. 그후 1963년 7월부터는 미국 인구협회의 재정보조가 있었으며 1964년 1월부터는 정부의 재정적 지원과 함께 연구시술병원을 전국 각처에 24개로 증설하여 본연구사업은 전국적 규모로 확대되었다. 본보고는 1963년 1월부터 1965년 6월까지 전국 24개 공동연구시술병원 에서 보내온 시술기록표 및 사후관찰 기록표를 기준으로 하여 얻은 소견을 기술한 것이다.