超短波电场对金属周围升温变化的影响

Objective To study the temperature changes around metal in ultrashort wave electric-field and it's influence factors.Methods Medical ultrashort wave therapeutic instrument was used and output switen was set at the 1 st grade.After tuning, one end of metal object was placed into 0.2ml water contained in a plastic tube ( with a length of 2cm and diameter of 2mm).Temperature changes of water around metal in different conditions were measured by digital thermometer.In experiments, several different conditions were studied, such as the length of metal, the vertical distance between metal and electrodes, the location of metal ultrashort electric field and the action duration of ultrashort wave.Results Under the same condition, when the prolate axis of metal paralleled to electrodes and the real lengths of metal outside of electric field were 10cm, 20cm, 30cm, 50cm, 70cm, 90cm, water temperatures around metal rose 4.37, 8.30,18.00, 20.64, 32.92 and 38.96℃, respectively; when the prolate axis of metal paralleled to electrodes and the verticaldistances between metal and one electrode were 1.5, 3.0, 4.5 and 6.Ocm, water temperatures around metal rose 66.03,49.37, 14.80 and 0.87℃, respectively; when the prolate axis of metal was vertical to electrodes and the distanees between one end of metal and electrodes were 5, 9 and 15cm, water temperature around metal rose 56.10,26.64 and11.07℃, respectively; when the vertical distances between metal and the electrode edge were 0,5,10,15cm, water temperatures around metal rose 25.32 , 10.26 ,2.88 and 1.53℃, respectively;when the lengths of metal with a fixed-length,the included real length in electric field, were 20, 10 and 0cm, water temperatures around metal rose 2.84 , 4.04 and7.30℃ , respectively.Under the same condition, the action duration of ultrashort wave were changed to be 5 and 10min,water temperatures around metal rose 24.90 and 39.07℃, respectively.Conclusion This study show that the water temperature rising around metal will be relatively small when:( 1 ) the real length of metal is short ; ( 2 ) the prolate axis of metal parallels to electrodes and is placed in the middle area between two electrodes;(3)the distance between two electrodes increase and the action duration is short;(4)the overall length of metal is contained in electric field between electrodes,or the metal is kept away from electrodes edges.     

眶爆裂性骨折36例临床诊治分析

目的探讨眼眶爆裂性骨折的临床特点和诊治方法。方法对2000年9月-2004年6月36例（36眼）眶爆裂性骨折的临床资料进行回顾性分析。结果致伤原因为拳击伤18例，车祸伤15例，其它3例。眼部临床症状和体征主要有复视、眼球运动障碍及眼球内陷等。CT检奁均有阳性发现。术后复视治愈32例。32眼眼球活动度完全改善，4眼部分改善。术后伤眼眼球突出度增至10．5，15．0mm，平均13．5mm；术后伤眼与健眼眼球突出度差为＋1．5--2．0mm，平均＋1．0mm。术后无并发症发生。结论CT扫描对眼眶爆裂性骨折的诊断有重要价值。术后早期进行眼球运动训练对提高复视的治愈率、改善眼球的运动功能有重要作用。     

蒺藜果皂苷对大鼠脑缺血后线粒体膜电位和Bcl-2、Bax mRNA表达的影响

目的 观察蒺藜果皂苷对大鼠脑缺血后线粒体膜电位和Bcl-2 mRNA、Bax mRNA表达的影响,探讨蒺藜果皂苷对大鼠脑缺血的保护作用.方法 60只Wistar大鼠随机分成5组:空白对照组、模型对照组、阳性药物舒血宁组、蒺藜果皂苷低剂量组和蒺藜果皂苷高剂量组.线栓法阻断一侧大脑中动脉,缺血24 h制成脑缺血模型.流式细胞仪检测线粒体膜电位,实时荧光定量PCR检测Bcl-2、Bax mRNA表达.结果 模型组的线粒体膜电位和Bcl-2 mRNA表达水平显著低于空白对照组(P<0.05),而阳性药物组和蒺藜果皂苷高、低剂量组的线粒体膜电位和Bcl-2 mRNA表达水平明显高于模型组(P<0.01);与模型组相比,阳性药物组、蒺藜果皂苷高、低剂量组和空白对照组的Bax mRNA表达水平则明显下降,统计学上差异具有显著性(P<0.05).结论 蒺藜果皂苷能够保持线粒体膜电位,增加Bcl-2 mRNA的表达而降低Bax mRNA的表达水平.     

基于图书馆多元化信息源体系建设对提升医学生信息素养的效果研究

本研究针对医学生信息素养存在的问题,通过建设云图书馆、医学院校特色书库、医学院校共享电子资源、创办医学生信息素养大赛等多种途径培养医学生信息素养。结果表明,教学改革前后医学生信息意识、信息知识、信息能力、信息道德及信息素养总分均有很大提升[（11.56±1.37）vs.（15.64±1.88）、（10.28±1.33）...     

人口老龄化与老年人口健康及疾病问题的研究进展

随着社会和经济的发展,人口老龄化已成为全球性的重大社会问题。人口老龄化因其发展速度较快,并且引起老年人口一系列的身体、心理和社会等健康问题,正逐步受到人们的广泛关注。本文作者对人口老龄化的发展现状及趋势,以及相关的老龄人口健康问题等做一综述。     

宫腔镜在功能失调性子宫出血中的治疗方式探讨

目的研究宫腔镜治疗功能失调性子宫出血的最佳治疗方式。方法回顾性分析在益阳市人民医院2009年2月到2010年2月妇产科收治的80例功能失调性子宫出血的患者,随机分为联合治疗组(40例)和单纯治疗组(40例)。联合治疗组采用宫腔镜和达那唑联合治疗,单纯治疗组仅适用宫腔镜。结果两组在治疗后需进行刮宫手术的患者的比例无显著差异(χ2=0.37,P>0.05),两组在宫腔镜治疗时测量手术时候的平均内膜厚度、术时灌流液用量,切除组织重量和手术持续时间等进行统计学分析后,差异皆有统计学意义(P<0.05)。两组总随访记录患者临床疗效差异无显著性(χ2=0.21,P>0.05)。结论宫腔镜联合达那唑治疗功能失调性子宫出血可以明显改善病变的厚度,减少了手术操作的难度,提高手术切除的完整性,减小手术时间,降低患者的手术痛苦,不良反应较少,具有临床应用和推广价值。     

卵巢子宫内膜异位症腹腔镜术后服用米非司酮及孕三烯酮的临床观察

目的探讨米非司酮及孕三烯酮用于卵巢子宫内膜异位症腹腔镜术后的疗效。方法选择因卵巢子宫内膜异位症在该院行腹腔镜术的患者52例,随机分为2组,A组为米非司酮治疗组（27例）,B组为孕三烯酮治疗组（25例）,观察疗效。结果米非司酮组27例,全部缓解,停药后复发2例,复发率为7.4%;孕三烯酮组25例,全部缓解,停药后复发1例,复发率为8%,对2组药停药后半年的复发率进行比较,发现差异并无显著意义（P〉0.05）。2组患者服药4～8周后出现肝酶升高,孕三烯酮发生率67.8%;米非司酮组发生率为36.2%,2组相比差异有显著意义。结论米非司酮用于卵巢子宫内膜异位症术后的治疗,有效、方便、廉价及副反应小,可作为术后药物治疗的选择。