Finger trapped in door latch removed using an electric saw. A new technique and review of other techniques

Trapping of fingers in metallic bands is a commonly encountered situation. The children, elderly people, and psychiatric patients are the usual victims. The constricting object in the digit causes obstruction to lymphatic and venous drainage leading to oedema distal to the constriction, which leads to further neurovascular compromise and presents as a surgical emergency. A 7-year-old boy presented to us with his right middle finger being stuck in a steel door latch. Multiple attempts were made to remove the trapped finger with conventional methods, and subsequently, it was removed by electric-driven metal cutting saw, which was not previously described in medical literature to the best of our knowledge.     

锯叶棕提取物治疗BPH伴OAB的疗效观察

目的：探讨锯叶棕提取物治疗BPH伴膀胱过度活动症（OAB）的临床疗效。方法：将2012年7月～2013年3月在我院诊断为BPH伴OAB患者100例随机分为研究组50例及对照组50例,研究组口服锯叶棕提取物（沙芭特）160mg,每天2次;对照组口服坦索罗辛0．2mg,每天1次。两组患者均服药8周,对比观察两组开始服药前、服药8周后的IPSS评分、OABSS评分、生活质量评分、最大尿流率（Qmax）、24h排尿次数、夜尿次数、每次排尿量等指标,观察研究组用药前后的疗效。结果：两组患者OAB较治疗前均有明显好转,治疗前后各项指标差异具有统计学意义（P〈0．05）;除max外,研究组与对照组其余观察指标治疗前后的变化值比较,差异均有统计学意义（P〈0．05）。结论：锯叶棕提取物（沙芭特）对于BPH伴OAB有明显的治疗作用,临床疗效较好。     

缝隙扩压叶栅近壁流场与流动损失实验

为了探索缝隙射流对高负荷扩压叶栅气动性能与近壁流场结构的影响机制,实验研究了设计冲角下有/无缝隙结构的高负荷弯曲扩压叶栅近壁流场结构与出口气动损失分布规律,获得了叶片近壁压力场数据、流动图谱以及叶栅出口流动损失参数。结果表明,缝隙两端压差导致的从叶片压力面到吸力面的射流能够增加附面层高熵流体的能量,缝隙射流将局部积聚的低能流体及时引向主流,减小高熵流体在叶展中部或端区掺混撞击,抑制了栅后尾迹高熵流体的过度聚集,从而有效提高高负荷压气机叶栅气动性能。      

痹祺胶囊联合刃针治疗膝骨性关节炎的疗效观察

目的 探究痹祺胶囊联合刃针治疗早期膝骨性关节炎（knee osteoarthritis,KOA）的疗效。方法 采用随机数字表法将70例KOA患者随机分成2组,各35例。2组患者均用刃针治疗,1次/周,共2次;对照组患者联合口服塞来昔布胶囊200 mg/次,1次/d;试验组患者联合口服痹祺胶囊1.2 g/次,3次/d;治疗14 d。比较治疗前后及3个月随访的视觉模拟评分（visual analogue scale,VAS）及西安大略和麦克马斯特大学（Western Ontario and McMaster University,WOMAC）骨关节炎指数量表评分来判定疗效。结果 纳入研究的70例KOA患者中有8例脱落,共有62例纳入分析。2组治疗后VAS及WOMAC评分较治疗前均显著降低（P<0.01）,但对照组比试验组的VAS分值降低更明显（P<0.05）,WOMAC评分在治疗2周后和3个月随访均为试验组降低更明显（P<0.05）。治疗2周后,2组有效率较接近（试验组96.9%,对照组90%）,3个月随访试验组有效率（93.8%）优于对照组（63.3%）（P<0.01）。结论 采用痹祺胶囊联合刃针与塞来昔布联合刃针治疗KOA均疗效显著,但痹祺胶囊联合刃针改善关节功能更明显,且疗效更稳定持久。     

刃针搜法治疗脑梗死后感觉障碍的临床研究

目的:探究刃针搜法治疗脑梗死后感觉障碍的临床作用机制。方法:将90例脑梗死后感觉障碍患者随机分为刃针治疗组、针刺对照组、药物对照组,每组30例。3组患者分别治疗14 d,评价治疗效果,并进行治疗前后的血液流变学、神经元功能、血流动力学、体感诱发电位等相关指标检测。结果:治疗后刃针治疗组疗效明显高于其他两组,差异有统计学意义(P<0.05)。与治疗前比较,3组患者治疗后Fugl-Meyer评分显著提高(P<0.05);患侧体感诱发电位(SEP)N20潜伏期明显缩短(P<0.05)、波幅明显增高(P<0.05);血浆粘度、血小板聚集率、纤维蛋白原等血液流变学指标明显改善(P<0.05);血清S100B、基质金属蛋白酶-9(MMP-9)显著下降(P<0.05),金属蛋白酶组织抑制剂-1(TIMP-1)显著升高(P<0.05);病侧大脑中动脉舒张末期血流速度(Vd)、收缩期最大血流速度(Vs)、平均血流速度(Vm)显著升高;刃针治疗组上述指标变化较药物对照组和针刺对照组显著(P<0.05)。结论:刃针搜法通过改善脑梗死后感觉障碍患者脑部组织血液循环和供血情况、改善神经元功能、促进感觉神经传导通路修复等作用机制达到治疗效果。     

The Springer Model for Lifetime Prediction of Wind Turbine Blade Leading Edge Protection Systems: A Review and Sensitivity Study

The wind energy sector is growing rapidly. Wind turbines are increasing in size, leading to higher tip velocities. The leading edges of the blades interact with rain droplets, causing erosion damage over time. In order to mitigate the erosion, coating materials are required to protect the blades. To predict the fatigue lifetime of coated substrates, the Springer model is often used. The current work summarizes the research performed using this model in the wind energy sector and studies the sensitivity of the model to its input parameters. It is shown that the Springer model highly depends on the Poisson ratio, the strength values of the coating and the empirically fitted a2 constant. The assumptions made in the Springer model are not physically representative, and we reasoned that more modern methods are required to accurately predict coating lifetimes. The proposed framework is split into three parts—(1) a contact pressure model, (2) a coating stress model and (3) a fatigue strength model—which overall is sufficient to capture the underlying physics during rain erosion of wind turbine blades. Possible improvements to each of the individual aspects of the framework are proposed.