目的:探究超声引导精索阻滞法在睾丸摘除及取精术中的应用效果。方法:回顾性分析2012年2月-2015年4月在本院进行睾丸摘除及取精术患者(62例)的临床资料,按治疗方法分为研究组和对照组,研究组32例,对照组30例。对两组患者麻醉阻滞成功率...目的:探究超声引导精索阻滞法在睾丸摘除及取精术中的应用效果。方法:回顾性分析2012年2月-2015年4月在本院进行睾丸摘除及取精术患者(62例)的临床资料,按治疗方法分为研究组和对照组,研究组32例,对照组30例。对两组患者麻醉阻滞成功率、术中和术后并发症情况以及围术期疼痛评分进行比较。结果:研究组患者麻醉阻滞成功率90.62%显著高于对照组的60.00%,差异有统计学意义(字2=7.918,P=0.005<0.05),且在术中药物追加、血肿、刺破血管等发生率均低于对照组,患者满意度高于对照组,差异均有统计学意义(P<0.05),在麻醉方式更改方面,差异无统计学意义(P>0.05);不同时间节点VAS评分比较,研究组患者在术中5 min及术后2、6、12 h均优于对照组,比较差异均有统计学意义(P<0.05),术后24 h VAS评分两组比较差异无统计学意义(P>0.05)。结论:超声引导精索阻滞法在睾丸摘除及取精术中阻滞成功率高,患者并发症较少,围术期内麻醉镇痛效果较好,临床应用价值较高,值得进一步推广使用。展开更多
Background Postprocedural aortic regurgitations following transcatheter aortic valve implantation （TAVI） procedures remain an is- sue. Benefit of oversizing strategies to prevent them isn＇t well established. We com...Background Postprocedural aortic regurgitations following transcatheter aortic valve implantation （TAVI） procedures remain an is- sue. Benefit of oversizing strategies to prevent them isn＇t well established. We compared different level of oversizing in our cohort of con- secutive patients to address if severe oversizing compared to normal sizing had an impact on post-procedural outcomes. Methods From January 2010 to August 2013, consecutive patients were referred for TAVI with preoperative Multislice-CT （MSCT） and the procedures were achieved using Edwards Sapien~ or Corevalve devices~. Retrospectively, according to pre-procedural MSCT and the valve size, pa- tients were classified into three groups： normal, moderate and severe oversizing; depending on the ratio between the prosthesis area and the annulus area indexed and measured on MSCT. Main endpoint was mid-term mortality and secondary endpoints were the Valve Academic Research Consortium （VARC-2） endpoints. Results Two hundred and sixty eight patients had a MSCT and underwent TAVI procedure, with mainly Corevalve~. While all-cause and cardiovascular mortality rates were similar in all groups, post-procedural new pacemaker （PM） implantation rate was significantly higher in the severe oversizing group （P = 0.03）, while we observed more in-hospital congestive heart-failure （P = 0.02） in the normal sizing group. There was a trend toward more moderate to severe aortic regurgitation （AR） in the normal sizing group （P = 0.07）. Conclusions Despite a higher rate of PM implantation, oversizing based on this ratio reduces aortic leak with lower rates of post-procedural complications and a similar mid-term survival.展开更多
The scheduling process of cracking furnace feedstock is important in an ethylene plant. In this paper it is described as a constraint optimization problem. The constraints consist of the cycle of operation, maximum tu...The scheduling process of cracking furnace feedstock is important in an ethylene plant. In this paper it is described as a constraint optimization problem. The constraints consist of the cycle of operation, maximum tube metal temperature, process time of each feedstock, and flow rate. A modified group search optimizer is proposed to deal with the optimization problem. Double fitness values are defined for every group. First, the factor of penalty function should be changed adaptively by the ratio of feasible and general solutions. Second, the "excellent" infeasible solution should be retained to guide the search. Some benchmark functions are used to evaluate the new algorithm. Finally, the proposed algorithm is used to optimize the scheduling process of cracking furnace feedstock. And the optimizing result is obtained.展开更多
Detonation of low energy detonating fuse was studied in numerical simulation and experiments in bending conditions using LS_DYNA3D. The results show that pressure of the explosion and detonation velocity decrease in t...Detonation of low energy detonating fuse was studied in numerical simulation and experiments in bending conditions using LS_DYNA3D. The results show that pressure of the explosion and detonation velocity decrease in the same section areas after bending. In bending conditions, detonation wave was similar to small angle comer diffraction. So the detonation velocity was lower than normal velocity.展开更多
文摘目的:探究超声引导精索阻滞法在睾丸摘除及取精术中的应用效果。方法:回顾性分析2012年2月-2015年4月在本院进行睾丸摘除及取精术患者(62例)的临床资料,按治疗方法分为研究组和对照组,研究组32例,对照组30例。对两组患者麻醉阻滞成功率、术中和术后并发症情况以及围术期疼痛评分进行比较。结果:研究组患者麻醉阻滞成功率90.62%显著高于对照组的60.00%,差异有统计学意义(字2=7.918,P=0.005<0.05),且在术中药物追加、血肿、刺破血管等发生率均低于对照组,患者满意度高于对照组,差异均有统计学意义(P<0.05),在麻醉方式更改方面,差异无统计学意义(P>0.05);不同时间节点VAS评分比较,研究组患者在术中5 min及术后2、6、12 h均优于对照组,比较差异均有统计学意义(P<0.05),术后24 h VAS评分两组比较差异无统计学意义(P>0.05)。结论:超声引导精索阻滞法在睾丸摘除及取精术中阻滞成功率高,患者并发症较少,围术期内麻醉镇痛效果较好,临床应用价值较高,值得进一步推广使用。
文摘Background Postprocedural aortic regurgitations following transcatheter aortic valve implantation （TAVI） procedures remain an is- sue. Benefit of oversizing strategies to prevent them isn＇t well established. We compared different level of oversizing in our cohort of con- secutive patients to address if severe oversizing compared to normal sizing had an impact on post-procedural outcomes. Methods From January 2010 to August 2013, consecutive patients were referred for TAVI with preoperative Multislice-CT （MSCT） and the procedures were achieved using Edwards Sapien~ or Corevalve devices~. Retrospectively, according to pre-procedural MSCT and the valve size, pa- tients were classified into three groups： normal, moderate and severe oversizing; depending on the ratio between the prosthesis area and the annulus area indexed and measured on MSCT. Main endpoint was mid-term mortality and secondary endpoints were the Valve Academic Research Consortium （VARC-2） endpoints. Results Two hundred and sixty eight patients had a MSCT and underwent TAVI procedure, with mainly Corevalve~. While all-cause and cardiovascular mortality rates were similar in all groups, post-procedural new pacemaker （PM） implantation rate was significantly higher in the severe oversizing group （P = 0.03）, while we observed more in-hospital congestive heart-failure （P = 0.02） in the normal sizing group. There was a trend toward more moderate to severe aortic regurgitation （AR） in the normal sizing group （P = 0.07）. Conclusions Despite a higher rate of PM implantation, oversizing based on this ratio reduces aortic leak with lower rates of post-procedural complications and a similar mid-term survival.
基金Supported by the Major State Basic Research Development Program of China(2012CB720500)the National Natural Science Foundation of China(Key Program:U1162202),the National Natural Science Foundation of China(61174118)+2 种基金the National High-Tech Research and Development Program of China(2012AA040307)Shanghai Key Technologies R&D program(12dz1125100)Shanghai Leading Academic Discipline Project(B504)
文摘The scheduling process of cracking furnace feedstock is important in an ethylene plant. In this paper it is described as a constraint optimization problem. The constraints consist of the cycle of operation, maximum tube metal temperature, process time of each feedstock, and flow rate. A modified group search optimizer is proposed to deal with the optimization problem. Double fitness values are defined for every group. First, the factor of penalty function should be changed adaptively by the ratio of feasible and general solutions. Second, the "excellent" infeasible solution should be retained to guide the search. Some benchmark functions are used to evaluate the new algorithm. Finally, the proposed algorithm is used to optimize the scheduling process of cracking furnace feedstock. And the optimizing result is obtained.
文摘Detonation of low energy detonating fuse was studied in numerical simulation and experiments in bending conditions using LS_DYNA3D. The results show that pressure of the explosion and detonation velocity decrease in the same section areas after bending. In bending conditions, detonation wave was similar to small angle comer diffraction. So the detonation velocity was lower than normal velocity.
