基于专家咨询法的医用超声诊断设备服务体系评价指标筛选研究

目的筛选医用超声诊断设备服务的评价指标,构建评价体系,对比评价不同品牌服务商的服务水平。方法邀请专家开展问卷咨询,在企业服务、产品服务和客户服务三个层面的一级指标,经前期专家头脑风暴设定的28项二级指标的基础上进行指标筛选,构建服务体系。结果所有二级指标重要性评分均>3.5分;变异系数<0.25的二级指标共22项,且所有重要性评分>4分的指标变异系数均<0.25;变异系数>0.3的仅1项。结论经过专家咨询,医用超声设备服务评价指标选择方面意见逐步趋同,公司文化、技术创新与推广等6项指标仍存在争议,需要通过第二轮咨询或进一步理论和实证研究加以检验。     

全科医学基层实践基地师资综合评价指标体系的构建

目的 构建一套科学、系统的全科医学基层实践基地师资综合评价指标体系,为全科基层实践基地的师资遴选、评价和考核提供参考。方法 在文献研究、专家咨询和小组讨论的基础上,初步构建全科基层实践基地师资原始指标体系。选择具有中级及以上职称,并长期从事医学教育管理、全科医疗与教学、基层医疗卫生服务与管理工作的32名专家,进行两轮德尔菲专家函询,并对函询结果进行统计分析,确定全科基层实践师资综合评价指标。运用层次分析法计算各指标权重并进行一致性检验。运用Yaahp统计学软件进行数据录入和处理。结果 构建出包含3个一级指标、12个二级指标和61个三级指标的全科医学基层实践基地师资综合评价指标体系。3个一级指标分别为师资遴选纳入标准、教学能力评价标准、师资考核标准;权重系数分别为0.334、0.525、0.142。结论 本研究构建的指标体系具有较好的科学性和系统性,为进一步加强全科基层实践基地师资队伍的建设和管理、提升全科住院医师培养质量,提供了理论依据。     

类风湿关节炎发病运气分析

<正>类风湿关节炎(rheumatoid arthritis,RA)是一种发病机制不明的以侵蚀性、对称性多关炎为主要临床表现的慢性、全身性自身免疫性疾病~[1]。RA归属中医"痹证"范畴。《素问·痹论》云:"风寒湿三气杂至,合而为痹也。"风湿病的发病与"乘年之虚,失时之和"有着密切的关系~[2]。年运的太过不及、司天在泉、运气同化、主客气以及客主加临等因素对风湿病的发病起着一定的影响。本文将通过回顾性病例研究     

Large-scale analysis of interindividual variability in single and paired-pulse TMS data

ObjectiveThis study brought together over 60 transcranial magnetic stimulation (TMS) researchers to create the largest known sample of individual participant single and paired-pulse TMS data to date, enabling a more comprehensive evaluation of factors driving response variability.MethodsAuthors of previously published studies were contacted and asked to share deidentified individual TMS data. Mixed-effects regression investigated a range of individual and study level variables for their contribution to variability in response to single and paired-pulse TMS data.Results687 healthy participant’s data were pooled across 35 studies. Target muscle, pulse waveform, neuronavigation use, and TMS machine significantly predicted an individual’s single-pulse TMS amplitude. Baseline motor evoked potential amplitude, motor cortex hemisphere, and motor threshold (MT) significantly predicted short-interval intracortical inhibition response. Baseline motor evoked potential amplitude, test stimulus intensity, interstimulus interval, and MT significantly predicted intracortical facilitation response. Age, hemisphere, and TMS machine significantly predicted MT.ConclusionsThis large-scale analysis has identified a number of factors influencing participants’ responses to single and paired-pulse TMS. We provide specific recommendations to minimise interindividual variability in single and paired-pulse TMS data.SignificanceThis study has used large-scale analyses to give clarity to factors driving variance in TMS data. We hope that this ongoing collaborative approach will increase standardisation of methods and thus the utility of single and paired-pulse TMS.     

Mutations in the transcription factor FOXO1 mimic positive selection signals to promote germinal center B cell expansion and lymphomagenesis

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From the Cover: Efficient computation of optimal actions

Optimal choice of actions is a fundamental problem relevant to fields as diverse as neuroscience, psychology, economics, computer science, and control engineering. Despite this broad relevance the abstract setting is similar: we have an agent choosing actions over time, an uncertain dynamical system whose state is affected by those actions, and a performance criterion that the agent seeks to optimize. Solving problems of this kind remains hard, in part, because of overly generic formulations. Here, we propose a more structured formulation that greatly simplifies the construction of optimal control laws in both discrete and continuous domains. An exhaustive search over actions is avoided and the problem becomes linear. This yields algorithms that outperform Dynamic Programming and Reinforcement Learning, and thereby solve traditional problems more efficiently. Our framework also enables computations that were not possible before: composing optimal control laws by mixing primitives, applying deterministic methods to stochastic systems, quantifying the benefits of error tolerance, and inferring goals from behavioral data via convex optimization. Development of a general class of easily solvable problems tends to accelerate progress—as linear systems theory has done, for example. Our framework may have similar impact in fields where optimal choice of actions is relevant.     

Remission rate and survival in acute myeloid leukemia: impact of selection and chemotherapy

113 patients with acute myelogenous leukemia (AML), representing 82% of the total cohort of AML patients within the geographical area of northern Sweden, were recorded. The total complete remission (CR) rate was 47.8%, and median survival was 4 months. The probability of long-term survival for all patients without exclusions was only 5%. Thus, the results from this study differ strongly from data on patient outcome in most therapy studies in AML, where the influence of patient selection on the results is larger. The median age in our patients was 63 years, which is also higher than in most other studies. Elderly patients had a low CR rate (24% in patients greater than or equal to 70 yr), but remission duration was similar in the different age groups. Patients treated according to "high-dose" protocols had a CR rate of 64%, while only 14% of less aggressively treated patients achieved remission. A better response rate after more aggressive chemotherapy was evident also in elderly patients. CR rate was 81% in patients below 60 yr of age who had no antecedent blood disorder and who had had symptoms for less than 3 months. Other variables with prognostic implications were: cytogenetic subgroup, antecedent hematological disease, and level of serum ferritin. High serum ferritin was associated with short CR duration. Ferritin is produced by the leukemic cells and could be regarded as a marker for leukemic activity.     

A case of severe recurrent hepatitis with common variable immunodeficiency.

Severe hepatitis with an indistinct etiology manifested in a 16-year-old boy who had no particular history. The histological features of the liver and clinical course of the patient were similar to those of patients with autoimmune hepatitis characterized by interface hepatitis and severe lobular inflammation of the liver and recurrent exacerbations of hepatitis. We administered intravenous glycyrrhizin preparation daily or three times a week combined with the oral administration of ursodeoxycholic acid daily throughout the term after the initial onset of disease for the control of disease activity. The normalization of the concentration of alanine aminotransferase in serum was achieved in response to the therapy during the course. The serum concentration of immunoglobulins of the patient gradually decreased from the onset of the disease to an unacceptable level without globulin preparation during the following period of 17 months. Immunological tests revealed impairment of immunoglobulin production bythe B cell population of the patient, which led to the diagnosis of the patient as common variable immunodeficiency (CVID). The patient, with improved liver histology after 27 months from the onset of disease, benefited from the current combination therapy without severe infection through the avoidance of overimmunosuppression. CVID is defined as a heterogeneous syndrome characterized by various degrees of hypogammaglobulinemia without any specific predisposing causes, frequently associated with autoimmunity. Diagnostic criteria and therapeutic options of persistent hepatitis with CVID are to be established, as discussed in the current report.     

New approaches to understanding the immune response to vaccination and infection

The immune system is a network of specialized cell types and tissues that communicates via cytokines and direct contact, to orchestrate specific types of defensive responses. Until recently, we could only study immune responses in a piecemeal, highly focused fashion, on major components like antibodies to the pathogen. But recent advances in technology and in our understanding of the many components of the system, innate and adaptive, have made possible a broader approach, where both the multiple responding cells and cytokines in the blood are measured. This systems immunology approach to a vaccine response or an infection gives us a more holistic picture of the different parts of the immune system that are mobilized and should allow us a much better understanding of the pathways and mechanisms of such responses, as well as to predict vaccine efficacy in different populations well in advance of efficacy studies. Here we summarize the different technologies and methods and discuss how they can inform us about the differences between diseases and vaccines, and how they can greatly accelerate vaccine development.