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multi-aspect analysis of ureteral access sheath usage in retrograde intrarenal surgery: A RIRSearch group study

Asian Journal of Urology 2024年第1期11卷 80-85页

作者： Oktay Özman Hacı m.Akgül cem Başataç Önder Çınar Eyüp B.Sancak cenk m.yazıcı Bülent Önal Haluk Akpınar Gaziosmanpasa Training and Research Hospital Urology ClinicİstanbulTurkey TekirdağNamık Kemal University School of MedicineDepartment of UrologyTekirdağTurkey Group Florence Nightingale Hospitals Department of UrologyİstanbulTurkey Zonguldak Bulent Ecevit University School of MedicineDepartment of UrologyZonguldakTurkey Çanakkale Onsekiz mart University School of MedicineDepartment of UrologyÇanakkaleTurkey İstanbul University-cerrahpaşa Cerrahpaşa Medical FacultyDepartment of UrologyİstanbulTurkey

Objective:To evaluate the effect of ureteral access sheath(UAS)use and calibration change on stone-free rate and complications of retrograde intrarenal surgery(RIRS).methods:Data from 568 patients undergoing RIRS for kidney or upper ureteral stones were retrospectively ***,patients were compared after 1:1 propensity score matching,according to UAS usage during RIRS(UAS used[+]87 and UAS non-used[−]87 patients).Then all UAS+patients(n=481)were subdivided according to UAS calibration:9.5-11.5 Fr,10-12 Fr,11-13 Fr,and 13-15 *** outcomes of the study were the success and complications of ***:Stone-free rate of UAS+patients(86.2%)was significantly higher than UAS−patients(70.1%)after propensity score matching(p=0.01).Stone-free rate increased with higher caliber UAS(9.5-11.5 Fr:66.7%;10-12 Fr:87.0%;11-13 Fr:90.6%;13-15 Fr:100%;pcomplications of UAS+patients(11.5%)were significantly lower than UAS−patients(27.6%)(p=0.01).complications(8.7%)with 9.5-11.5 Fr UAS was lower than thicker UAS(17.2%)but was not statistically significant(p=0.09).UAS usage was an independent factor predicting stone-free status or peri-and post-operative complications(odds ratio[OR]3.654,95%confidence interval[cI]1.314-10.162;OR 4.443,95%cI 1.350-14.552;OR 4.107,95%cI 1.366-12.344,respectively).conclusion:Use of UAS in RIRS may increase stone-free rates,which also increase with higher caliber *** usage may reduce complications;however,complications seemingly increase with higher UAS calibration.

关键词： Stone Retrograde intrarenal surgery Ureteral access sheath Urolithiasis Kidney

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冷却系统阻力对汽车总阻力影响的数值预测模型研究（英文）

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空气动力学学报 2016年第2期34卷 232-238页

作者： A. Rustem Aslan Kerem Anbarci m.Berkay Acikgoz Omur Icke Ozgur Asian cenk Dinc Istanbul Technical University Maslak Istanbul 34469 Turkey AES-Aero Engineering Ltd. Turkey FORD motor company Turkey

采用cFD方法数值模拟了小型汽车发动机冷却系统对全车阻力的影响特性。汽车的内部及外部(发动机舱及舱内)均设置了数值模拟网格。分别计算了散热器及风扇对阻力的影响,采用本校实验结果(散热器压力损失)及制造商提供的数据(散热器及风... 详细信息

采用cFD方法数值模拟了小型汽车发动机冷却系统对全车阻力的影响特性。汽车的内部及外部(发动机舱及舱内)均设置了数值模拟网格。分别计算了散热器及风扇对阻力的影响,采用本校实验结果(散热器压力损失)及制造商提供的数据(散热器及风扇的质量流率)确定初始及边界条件,为基于RNS的cFD提供输入。对汽车轮胎运动模式及行驶速度对散热系统阻力及汽车总阻的影响特性也进行了计算分析。预测结果表明,冷却系统阻力占汽车总阻的6.9%,与实测值吻合。

关键词：数值方法计算流体力学湍流模型冷却系统阻力散热器风扇实验测量

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Hyperbaric-oxygen treatment: An adjunctive therapy in acute renal failure due to crush injury

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Natural Science 2012年第8期4卷 699-704页

作者： Rumeyza Kazancioglu cenk Gulgun Salih Aydin Nilgun Aysuna Semra Bozfakioglu mehmet S Sever Bezmialem Vakif University Faculty of Medicine Department of Nephrology Istanbul Turkey Istanbul University Istanbul Medical Faculty Department of Nephrology Istanbul Turkey Istanbul University Istanbul Medical Faculty Department of Undersea and Hyperbaric Medicine Istanbul Turkey

Objective: major seismic events leave their survivors trapped under the rubble leading to extensive muscle damage and its devastating sequale of hemodynamic and metabolic disturbances and acute renal failure. Hypoxemia aggravated during each hemodialysis (HD) session is important in acute renal failure patients with massive tissue injury. We retrospectively analyzed the adjunctive role of hyperbaric-oxygen (HBO) therapy in patients treated with HD for acute renal failure due to crush injury in terms of dialysis duration. Patients and methods: 16 patients admitted after the marmara earthquake to Istanbul Faculty of medicine were treated with HBO. Only 8 (2m, 6F, mean age: 24.8 + 7.3 years) of them had required HD treatment. 29 (16m, 13F, mean age: 34.6 + 12.9 years) crush syndrome patients treated with HD but not with HBO were taken as controls and the clinical and laboratory data of the two groups were compared. Results: The mean duration time under the rubble for the HBO group was 9.4 + 3.2 hours. mainly lower extremity fasciotomies were performed at 15.6 + 14.8 hours after extrication. There were no amputations in this group. There were three amputations in the control group. The mean number of HD sessions was 9.2 + 6.7/patient for 10.9+9.6 days until renal functions recovered and the patients had 27.4 + 15.6 HBO sessions until the recovery of their lesions. There were no correlations between the number of HBO sessions and any laboratory parameter nor the number of HD sessions. There was no statistical difference in the need for HD between the HBO and control group. conclusions: Our results could not demonstrate any beneficial effect of HBO treatment in terms of HD duration;however, the valuable contribution of the HBO treatment was to increase the salvage of crushed limbs.

关键词： Hyperbaric Oxygen Treatment crush Injury Hemodialysis

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