Layer-specific and whole wall global longitudinal strain predict major adverse cardiovascular events in patients with stable angina pectoris

The International Journal of Cardiovascular Imaging - Global longitudinal strain (GLS) has proven to be a powerful prognostic marker in various patient populations, but the prognostic value of...     

基于理论域框架的ICU护士执行身体约束缩减行动障碍因素的质性研究

目的：探讨ICU护士执行身体约束缩减行动的障碍因素，为制定身体约束标准化管理方案提供依据。方法：基于理论域框架（TDF）制定访谈提纲，采用目的抽样法对天津市某三级甲等医院的12名ICU护士进行半结构式访谈，按照TDF的相关领域对转录后的资料进行归类，用内容分析法对访谈资料进行分析。结果：ICU护士对身体约束缩减行动理解存在偏差、对约束替代措施内容的不熟悉是其执行身体约束缩减行动的障碍因素之一；身体约束缩减方案评估工具、决策流程的不规范对缩减约束行动的开展造成了一定阻碍；环境因素的限制及对缩减约束结果的担忧，使ICU护士没有足够的信心去执行；科室缺乏支持缩减约束的组织氛围，难以引起护士对执行约束缩减行动的重视，进而削减执行的动力。结合理论域框架将上述因素分别归属为知识、自我效能、环境背景和资源、社会影响、行为规范5个领域。结论：知识、自我效能、环境背景和资源、社会影响及行为规范为ICU护士执行身体约束缩减行动的障碍因素。科室要在明确障碍因素的基础上，加强领导层对执行缩减约束的重视和支持。制定缩减约束评估决策规范化流程以及培训方案，倡导团队协作，创造支持身体约束缩减行动的组织氛围，坚定ICU护士执行缩减约束的信心，促进身体约束缩减行动的持续实施。     

Synthesis and automated fluorine-18 radiolabeling of new PSMA-617 derivatives with a CuAAC radiosynthetic approach

In the last decade, the development of new radiopharmaceuticals for the imaging and therapy of prostate cancer has been a highly active and important area of research, especially focusing on the prostate-specific membrane antigen (PSMA), an antigen which is upregulated in prostate, as well as in other tumor cells. A large variety of PSMA ligands have been radiolabeled, to date. Among the various derivatives, PSMA-617 resulted to be one of the most interesting in terms of interaction with the antigen and clinical properties, and its lutetium-177 labeled version has recently been approved by regulatory agencies for therapeutic purposes. For this reasons, the radiolabeling with fluorine-18 of a PSMA-617 derivative might be of interest. Beside other methodologies to radiolabel macromolecules with fluorine-18, the “click-chemistry” approach resulted to be very useful, and the copper-catalyzed azide-alkyne cycloaddition (CuAAC) is considered one of most efficient and reliable. This paper proposes the synthesis of a suitable precursor for the radiolabeling with fluorine-18 of a new PSMA-617 derivative. The whole radiosynthetic procedure has been fully automated, and the final product, which proved to be stable in plasma, has been obtained with radiochemical yield and purity suitable for subsequent preclinical studies.