23EX直线加速器 7年故障统计分析经验

目的 研究故障统计分析在23EX加速器日常维护中的应用。方法 收集2008-2015年间23EX加速器的故障数据。分析23EX加速器故障率与时间关系,利用帕累托图统计分析影响23EX加速器稳定性的主要子系统和主要零部件。结果 23EX加速器运行 7年共发生故障318次,更换零部件358个。加速器投入使用后1.5年内故障率逐渐增加,最高时达38次/半年,之后有所下降并保持相对稳定,1年中第3季度是加速器故障率最高时间段。影响23EX加速器稳定性的主要子系统是MLC和机械系统,分别占总故障数66.4%和11.9%;影响23EX加速器稳定性的主要零部件是MLC叶片螺母和叶片马达,分别占总更换零部件的38.8%和28.5%。结论 加速器故障统计分析有助于维护人员发现故障的分布规律,找出影响加速器稳定性的主要因素,为制定日常维护计划、改善维护策略提供依据。     

维持性血液透析合并肌少症患者运动干预方案的构建及应用

目的 构建维持性血液透析合并肌少症患者透析中运动干预方案并评价其应用效果.方法 基于证据总结和德尔菲专家函询法,构建维持性血液透析合并肌少症患者透析中运动干预方案.将2021年3月—7月在连云港市某三级甲等医院行维持性血液透析合并肌少症的51例患者随机分为试验组25例和对照组26例,试验组在常规护理的基础上实施透析中运...     

浅谈医疗设备的维修与管理

如何有效地在常态下做好医院医疗设备维修与管理工作,提高设备使用寿命,并在故障发生时能够做到准确快速维修,是医疗设备维修工程师必须解决的课题。本文通过论述采用符合实际的维修和管理方法,以提高医疗设备的使用寿命,节约维护费用。     

Patients' Attitudes and Physicians' Perceptions Toward Maintenance Therapy for Advanced Non–Small-cell Lung Cancer: A Multicenter Italian Survey

Introduction

Pemetrexed maintenance therapy (MT) after induction with platinum-based chemotherapy has recently become a common treatment strategy for advanced nonsquamous non–small-cell lung cancer (NSCLC). However, the benefits of MT should be weighed with consideration of the patients' perceptions and preferences. The aim of the present study was to evaluate patients' attitudes toward MT and to describe physicians' awareness of their patients' inclinations.

维持性血液透析患者生命质量测定量表研制中的条目筛选

目的 研制维持性血液透析患者生命质量测定量表的特异模块.方法 采用议题小组和核心小组的程序化决策方式及借鉴国内、外建立量表的经验制定本量表,通过定性访谈和定量调查分析相结合的方法对条目进行初筛选、评价和修改形成初步量表,随机抽取25例维持性血液透析患者和25名医务工作者进行问卷调查,采用变异度法、相关系数法、因子分析法、患者重要性评分及医生重要性评分法对结果进行分析.结果 采用上述5种方法分别选出17、17、10、16和16个条目,最终得出包含16个条目的 特异模块.结论 该特异模块的条目均按严格的程序筛选得出,具有较好的内容效度和代表性.     

医用X光机的原理、维护和故障诊断

随着现代医疗技术的不断发展,X光机被广泛应用到医疗诊断中。简要介绍医用X光机的应用和维护,并列举西门子两款X光机的故障整修实例。     

Maintenance of exercise-induced benefits in physical functioning and bone among elderly women

Summary  This study showed that about a half of the exercise-induced gain in dynamic balance and bone strength was maintained one year after cessation of the supervised high-intensity training of home-dwelling elderly women. However, to maintain exercise-induced gains in lower limb muscle force and physical functioning, continued training seems necessary. Introduction  Maintenance of exercise-induced benefits in physical functioning and bone structure was assessed one year after cessation of 12-month randomized controlled exercise intervention. Methods  Originally 149 healthy women 70–78 years of age participated in the 12-month exercise RCT and 120 (81%) of them completed the follow-up study. Self-rated physical functioning, dynamic balance, leg extensor force, and bone structure were assessed. Results  During the intervention, exercise increased dynamic balance by 7% in the combination resistance and balance-jumping training group (COMB). At the follow-up, a 4% (95% CI: 1–8%) gain compared with the controls was still seen, while the exercise-induced isometric leg extension force and self-rated physical functioning benefits had disappeared. During the intervention, at least twice a week trained COMB subjects obtained a significant 2% benefit in tibial shaft bone strength index compared to the controls. A half of this benefit seemed to be maintained at the follow-up. Conclusions  Exercise-induced benefits in dynamic balance and rigidity in the tibial shaft may partly be maintained one year after cessation of a supervised 12-month multi-component training in initially healthy elderly women. However, to maintain the achieved gains in muscle force and physical functioning, continued training seems necessary.     

Maintenance therapy for NSCLC: Consensus and controversy

Nowadays,advanced non-small cell lung cancer (NSCLC) is still an incurable disease.However,recent researches on maintenance therapy have led to considerable progress.Recently,pemetrexed and erlotinib have been approved for maintenance chemotherapy by both the U.S.Food and Drug Administration and European Medicines Agency.However,there are not adequate data to support the maintenance therapy as the standard treatment for advanced NSCLC and there has been no conclusive predictor of who will get benefit from m...     

A genome-wide association study of Cloninger's temperament scales: Implications for the evolutionary genetics of personality

Variation in personality traits is 30-60% attributed to genetic influences. Attempts to unravel these genetic influences at the molecular level have, so far, been inconclusive. We performed the first genome-wide association study of Cloninger's temperament scales in a sample of 5117 individuals, in order to identify common genetic variants underlying variation in personality. Participants’ scores on Harm Avoidance, Novelty Seeking, Reward Dependence, and Persistence were tested for association with 1,252,387 genetic markers. We also performed gene-based association tests and biological pathway analyses. No genetic variants that significantly contribute to personality variation were identified, while our sample provides over 90% power to detect variants that explain only 1% of the trait variance. This indicates that individual common genetic variants of this size or greater do not contribute to personality trait variation, which has important implications regarding the genetic architecture of personality and the evolutionary mechanisms by which heritable variation is maintained.     

深入访谈法对牙周系统治疗维护阶段患者依从性的作用

目的研究影响牙周系统治疗维护阶段病人依从性的原因。方法对136例就诊的临床诊断为“慢性牙周炎”的患者采用深入访谈法调查影响牙周系统治疗维护阶段病人依从性的原因。结果患者对牙周病的认知程度可能是阻碍病人牙周系统治疗维护阶段按时复诊的决定性因素,而文化程度和月收入虽对病人此阶段良好依从性有一定影响但为非决定性因素。结论切实向病人宣传牙周病的病因、病程、治疗计划、预后可以获得良好的依从性,取得牙周病长期稳定的治疗效果。