In this editorial,I present my comments on the article by Solarino et al.Conversion hip arthroplasty,which is an optional salvage procedure performed following unsuccessful fixation of intertrochanteric femur fracture...In this editorial,I present my comments on the article by Solarino et al.Conversion hip arthroplasty,which is an optional salvage procedure performed following unsuccessful fixation of intertrochanteric femur fractures in elderly pati-ents,entails more complex processes and higher rates of operative complications than primary arthroplasty.Hence,it is important to consider the appropriateness of the primary treatment choice,as well as the adequacy of nailing fixation for intertrochanteric fractures.This article briefly analyzes the possible factors contributing to the nailing failure of intertrochanteric fractures and attempts to find corresponding countermeasures to prevent fixation failures.It also analyzes the choice of treatment between nailing fixation and primary arthroplasty for intertrochanteric fractures.展开更多
An exact forecast of the failures of a sucker rod-pumped well in a production area means much for an oilfield’s operation budget, operational arrangement and production plan. In this paper, according to the characte...An exact forecast of the failures of a sucker rod-pumped well in a production area means much for an oilfield’s operation budget, operational arrangement and production plan. In this paper, according to the characteristics of failed sucker rod-pumped well randomness and strong outburst, with the gray GM (1,1) forecast model and the Markov forecast model combined, gray GM (1,1) forecast model is utilized to handle the primary data of an oilfield, and Markov forecast model is utilized to calculate the state transfer probability of forecast value. Then, the gray Markov forecast model considering the influence of randomness factors is formed. Field results prove that the calculation precision of this method is higher and the practicability is greater.展开更多
离子交换法常被应用于胺液净化领域,但是在低碱液浓度下部分离子交换树脂难以再生,存在失效的问题。利用SEM、EDS、FT-IR和XPS等手段对树脂的失效原因进行分析,并利用电再生的方法对失效树脂的再生进行了探究。实验结果显示,树脂净化胺...离子交换法常被应用于胺液净化领域,但是在低碱液浓度下部分离子交换树脂难以再生,存在失效的问题。利用SEM、EDS、FT-IR和XPS等手段对树脂的失效原因进行分析,并利用电再生的方法对失效树脂的再生进行了探究。实验结果显示,树脂净化胺液前后的骨架和功能基团并未改变,但是硫元素的质量分数显著提升,结合S 2p光谱存在162.2 eV和163.4 eV 2个分裂峰,说明树脂失效的主要原因是吸附的硫离子难以解吸;对失效树脂施加电再生时树脂的交换容量提升了3.6倍,吸附的硫元素质量分数下降了57.5%,表明电再生的方式可以提高树脂的交换容量和树脂内硫离子的解吸程度。展开更多
目的 观察计算机断层扫描(computed tomography,CT)引导下硬膜外粘连闭合松解器治疗腰椎手术失败综合征(failed back surgery syndrome,FBSS)的临床疗效及安全性。方法 选取解放军总医院第三医学中心骨科和康复医学科就诊的FBSS患者80例...目的 观察计算机断层扫描(computed tomography,CT)引导下硬膜外粘连闭合松解器治疗腰椎手术失败综合征(failed back surgery syndrome,FBSS)的临床疗效及安全性。方法 选取解放军总医院第三医学中心骨科和康复医学科就诊的FBSS患者80例,根据随机数字表法分为治疗组和对照组,各40例。治疗组采用硬膜外粘连闭合松解器治疗,1次/周,第2次治疗在第1次治疗2周后进行,共治疗2次;对照组予低频治疗,每次30 min,3次/周,共治疗2周,治疗结束后对比两组疗效。治疗前和治疗后1个月、3个月、6个月采用视觉模拟评分法(visual analogue scale,VAS)、改良Oswestry功能障碍指数(Oswestry disability index,ODI)和健康调查简表(the MOS item short from health survey,SF-36)进行评定,同时填写不良事件表进行安全性研究。结果 治疗6个月后,两组患者VAS评分及ODI评分均较治疗前降低(P<0.01),且治疗组显著优于对照组(P<0.01);对于SF-36评分,治疗6个月后,除对照组情感职能维度外,两组各维度均较治疗前显著改善(P<0.01),且在生理功能维度治疗组改善优于对照组(P<0.05),其余各维度治疗组改善显著优于对照组(P<0.01)。研究过程中仅治疗组发生晕针1例,两组均无严重不良反应发生(P>0.05)。结论 CT引导下硬膜外粘连闭合松解器治疗FBSS疗效确切,不良事件发生率低,可显著减轻FBSS患者疼痛程度,改善功能障碍。展开更多
文摘In this editorial,I present my comments on the article by Solarino et al.Conversion hip arthroplasty,which is an optional salvage procedure performed following unsuccessful fixation of intertrochanteric femur fractures in elderly pati-ents,entails more complex processes and higher rates of operative complications than primary arthroplasty.Hence,it is important to consider the appropriateness of the primary treatment choice,as well as the adequacy of nailing fixation for intertrochanteric fractures.This article briefly analyzes the possible factors contributing to the nailing failure of intertrochanteric fractures and attempts to find corresponding countermeasures to prevent fixation failures.It also analyzes the choice of treatment between nailing fixation and primary arthroplasty for intertrochanteric fractures.
文摘An exact forecast of the failures of a sucker rod-pumped well in a production area means much for an oilfield’s operation budget, operational arrangement and production plan. In this paper, according to the characteristics of failed sucker rod-pumped well randomness and strong outburst, with the gray GM (1,1) forecast model and the Markov forecast model combined, gray GM (1,1) forecast model is utilized to handle the primary data of an oilfield, and Markov forecast model is utilized to calculate the state transfer probability of forecast value. Then, the gray Markov forecast model considering the influence of randomness factors is formed. Field results prove that the calculation precision of this method is higher and the practicability is greater.
文摘离子交换法常被应用于胺液净化领域,但是在低碱液浓度下部分离子交换树脂难以再生,存在失效的问题。利用SEM、EDS、FT-IR和XPS等手段对树脂的失效原因进行分析,并利用电再生的方法对失效树脂的再生进行了探究。实验结果显示,树脂净化胺液前后的骨架和功能基团并未改变,但是硫元素的质量分数显著提升,结合S 2p光谱存在162.2 eV和163.4 eV 2个分裂峰,说明树脂失效的主要原因是吸附的硫离子难以解吸;对失效树脂施加电再生时树脂的交换容量提升了3.6倍,吸附的硫元素质量分数下降了57.5%,表明电再生的方式可以提高树脂的交换容量和树脂内硫离子的解吸程度。
文摘目的 观察计算机断层扫描(computed tomography,CT)引导下硬膜外粘连闭合松解器治疗腰椎手术失败综合征(failed back surgery syndrome,FBSS)的临床疗效及安全性。方法 选取解放军总医院第三医学中心骨科和康复医学科就诊的FBSS患者80例,根据随机数字表法分为治疗组和对照组,各40例。治疗组采用硬膜外粘连闭合松解器治疗,1次/周,第2次治疗在第1次治疗2周后进行,共治疗2次;对照组予低频治疗,每次30 min,3次/周,共治疗2周,治疗结束后对比两组疗效。治疗前和治疗后1个月、3个月、6个月采用视觉模拟评分法(visual analogue scale,VAS)、改良Oswestry功能障碍指数(Oswestry disability index,ODI)和健康调查简表(the MOS item short from health survey,SF-36)进行评定,同时填写不良事件表进行安全性研究。结果 治疗6个月后,两组患者VAS评分及ODI评分均较治疗前降低(P<0.01),且治疗组显著优于对照组(P<0.01);对于SF-36评分,治疗6个月后,除对照组情感职能维度外,两组各维度均较治疗前显著改善(P<0.01),且在生理功能维度治疗组改善优于对照组(P<0.05),其余各维度治疗组改善显著优于对照组(P<0.01)。研究过程中仅治疗组发生晕针1例,两组均无严重不良反应发生(P>0.05)。结论 CT引导下硬膜外粘连闭合松解器治疗FBSS疗效确切,不良事件发生率低,可显著减轻FBSS患者疼痛程度,改善功能障碍。
