基于临床路径的医师防御性医疗行为测量与分析

目的 提出具有较高可行性、效度和信度的防御性医疗行为测量工具和方法,了解医师防御性医疗行为的类型、数量和分布。方法 以河北省某医院的110例脑出血住院患者为例,以临床路径为基础,应用病历回顾性评判法对医师的防御性医疗行为进行测量和分析。结果 医师采取了多种类型的防御性医疗行为,内科治疗和外科手术治疗患者的防御性医疗分别占全部检查化验费的24.6%和21.1%。结论 研究提出的防御性医疗行为测量方法具有较高的科学性,但仍需进一步完善;医疗纠纷和诉讼压力导致医师产生了各种类型的防御性医疗行为,而且较为程度较为严重。     

基于法经济学的防御性医疗行为影响机制分析

基于法经济学视角,构建了医疗损害成本函数经济模型,并以此为工具确定了医师防御性医疗行为的界定标准,分析和推导出影响医师防御性医疗行为的关键因素包括在确定医疗损害责任时的信息不完善,医师承担大量的非财务成本损失,医疗损害赔偿的交易成本不为零,医师是风险规避型,医师不承担预防医疗损害的成本。     

医疗纠纷对医师防御性医疗行为影响的实证研究

目的 描述和分析医疗纠纷对医师防御性医疗行为的影响。方法 以河北省某医院的375名临床医师为调查对象,利用Mann Whittney U法和多元逐步回归分析等方法对数据进行统计分析。结果 82.9%的医生表示医患纠纷对诊疗工作的影响非常大或较大,临床医生的防御性医疗行为平均得分高达14.8分,最近2年亲身遭遇过医疗纠纷的患者防御性医疗行为得分高于未遭遇过医疗纠纷的患者。结论 面对越来越大的医疗纠纷和诉讼压力,临床医生普遍采取防御性医疗行为,且防御性医疗行为的程度较高。医生的医疗纠纷遭遇是防御性医疗行为严重程度的独立影响因素。     

医疗授权管理在综合性医院的应用与探讨

为保障医疗质量和医疗安全,制定《医疗授权管理制度》,通过对医疗小组组长、住院总医师等岗位进行授权,实施医疗准入、追踪和全过程管理,落实执业人员岗位责任制,进一步规范医师执业行为,确保临床医疗技术合理应用。同时,建立完整的考核评价体系与退出机制,与绩效挂钩,充分调动被授权者的积极性。     

虫害诱导植物合成防御性次生代谢产物的研究进展

昆虫对植物的取食活动可以激活植物的防御反应,诱导植物通过调控自身的代谢网络合成防御性次生代谢产物,抵御外界不良刺激。虫害诱导植物合成防御性次生代谢产物及其机制研究已成为近年来的研究热点之一。现对虫害诱导的植物防御性次生代谢产物、昆虫危害产生的各类激发子、植物对激发子的识别、虫害应答相关的信号转导通路及其对次生代谢物质积累的调控进行了综述,可为虫害诱导植物合成防御性次生代谢产物的机制研究提供参考,为植物虫害防治研究、植物次生代谢物质的生产和利用提供理论依据。     

医师执业行为质量安全评价体系的构建与应用

为推进落实全市改善医疗服务行动计划,进一步加强医师依法执业,落实16项医疗核心制度,规范诊疗行为,持续改进医疗服务质量,保证临床医疗科学、合理、有效,确保医疗质量安全,市卫生计生委结合实际,构建了医师执业行为质量安全评价体系。体系由4个部分组成：一是病历书写,二是医疗核心制度,三是依法执业,四是临床用血。通过病历对这4个方面进行考评,确保荆门市医疗质量得到控制并持续性改进,增强医务人员规范化的病历书写意识,促进医疗质量的全面提高。     

从医疗损害赔偿责任层面破解我国医师多点执业困境

推行医师多点自由执业从理论上讲可以打破优质医疗资源集中在大城市、大医院这种不均衡分布的局面。由于医师异地执业出现医疗损害的赔偿责任究竟是执业医师本人承担、接受或输出医疗机构承担并不明确,一旦发生医患纠纷或医疗损害可能会出现“三方都不想管、三方都要负责”的局面。从试点地区的情况来看,结果并不满意,多数属于“叫好不叫座”。尝试从医疗损害赔偿责任层面解读我国医师多点执业面临的困境后得出：必须完善医疗损害鉴定机制,构建执业医师自由人制度,医师本人需购买异地执业医疗损害赔偿责任强制性保险,在此基础上才有可能逐步推行真正意义上的医师多点执业。     

对某三甲医院临床医疗告知行为现状的调查与分析

??????? 目的 基于对医生告知行为的调查,发现目前临床中存在的医疗告知行为方面的不足。方法 采用随机抽样的方式对217名医务人员进行医疗告知行为情况的调查。结果 医疗机构在医疗告知方面存在缺陷：医疗告知主体高年资医师参与度不高;医疗告知对象主要是患者的近亲属,而不是患者本人;医疗告知注重风险告知,而忽视了对患者病情及医疗方案等内容的告知。结论 目前临床工作中在医疗告知方面不足,医疗机构应该通过完善制度、培训医师及管理部门加强监管等方面来保障医疗知情告知起到其应有的作用。     

我国医务人员不良执业行为记分管理的实施进展与建议

通过政策研究和文献综述,分析了国内医务人员不良执业行为记分管理面临的问题并提出相关建议。目前,国内医务人员不良执业行为记分管理面临法律基础薄弱、记分项目内容不规范和记分管理混乱问题。建议国家层面尽快出台相关指导性和规范性政策文件,推动各地建立健全医务人员不良执业行为记分管理制度,建立医务人员诚信档案,构建医务人员不良执业行为记分信息化监管平台和不良执业行为信息发布平台,实现对医师不良执业行为的实时评估和预警,使有限的监管人员发挥最佳的管理效能,形成长效监督机制,充分保障医疗质量和医疗安全。     

医疗损害鉴定制度的改革与发展

医疗损害指因医疗机构及其医务人员的故意或过失（即医疗过错）,造成就医患者身体上或精神上的损害结果。医疗损害鉴定是指医疗机构及其医务人员在日常医疗行为中存在法定过错并造成患者人身损害而导致的医疗损害民事诉讼,人民法院针对医疗技术的高风险、高技术等问题对外委托的鉴定。其内容主要针对医疗行为整个过程的审查和分析,对照卫生行政法规、部门规章诊疗护理规范及常规,判定医师有无过错,医疗过错行为与损害结果之间是否存在因果关系,医疗过错行为在损害结果中的责任程度以及人体损伤残疾程度等方面。     

A novel model of early type 1 diabetes mellitus: The chick embryo air sack model

Diabetes Mellitus (DM) is a metabolic disease characterized by hyperglycemia. Chronic hyperglycemia is associated with long-term dysfunction such as retinopathy, nephropathy, neuropathy and cardiovascular diseases. These complications increase rates of death and disability worldwide. Due to the negative effects of DM on the quality of life, the mechanism and treatments of the disease should be investigated in more detail. Most of the research in diabetes is performed in experimental animals. Experimental animal models contributed to the advancement of clinical research, the development of new therapeutic approaches, the discovery of insulin and the purification of insulin. There are many animal models of DM in the literature. But there are a few DM model studies created with chick embryos. In these studies, it was seen that there were differences in STZ doses and STZ administration techniques. The objective of this study was to create a more acceptable and easier DM model. 180 specific pathogen free (SPF) fertilized chicken eggs (White Leghorn chicken) were used in this study. STZ was administered to 160 SPF eggs for an induced DM model. The remaining 20 SPF eggs were separated as a control group. We used two different DM models (Air sack model (ASM) and Chorioallantoic membrane model (CAMM)) and blood sampling technique in our study. 160 SPF eggs were divided into two groups with 80 eggs in each group, according to the model in which STZ was administered. When the relationship between blood glucose and blood insulin levels were examined, it was determined that there was a significantly strong negative correlation in the control group and ASM 1 group; and a significantly very strong negative correlation was found in the ASM 2 group and ASM 3 group. Our data indicate that the optimal STZ dose to create a DM model was 0.45 mg/egg and the best DM model was ASM. The second technique to be the best blood sampling technique for determining blood glucose levels. We believe that ASM can be used in DM studies and anti-DM drug studies in terms of its easebly, applicability, reproducibility and low cost.     

bFGF-Regulating MAPKs Are Involved in High Glucose-Mediated ROS Production and Delay of Vascular Endothelial Cell Migration

High blood sugar is a symptom of diabetes mellitus (DM). Vascular endothelial cells (VECs) directly contact the blood and are damaged when blood sugar levels are high. However, the molecular mechanism underlying this process remains elusive. To analyze the effects of DM on migration, we simulated DM by applying high glucose (HG) to the human VEC. HG delayed cell migration and induced phosphorylation of MAPKs (JNK and ERK). By contrast, in presence of bFGF, cell migration was promoted and MAPK phosphorylation levels were reduced. Furthermore, treatment with JNK and ERK inhibitors rescued HG-mediated delay of cell migration. Molecular and cell biological studies demonstrated that HG increased ROS production, whereas treatment with bFGF or JNK/ERK inhibitors blocked HG-induced ROS accumulation. Addition of MnTMPyP, a ROS scavenger, reduced HG-induced ROS production and accelerated cell migration, suggesting that the influence of HG on bFGF–MAPK signaling causes accumulation of ROS, which in turn regulate cell migration. This is the first study to elucidate the molecular mechanism of HG-mediated VEC migration; these findings could facilitate the development of novel therapies for DM.     

Influence of Observer Presence on Pacific Damsel Bug Behavior: Who is Watching Whom?

When direct observations are used to study animal behavior the presence of the observer may alter the animal and hence influence the data being collected, yet few studies have quantified this effect. We conducted direct observation studies in the glasshouse to assess the relative influence of observer presence on the behavior of Pacific damsel bugs, Nabis kinbergii, a potentially important predator of crop pests. Comparisons of predator activity, predator distribution, prey (Helicoverpa armigera) mortality and prey distribution between frequently observed and minimally observed treatments, during diurnal and nocturnal observation sessions showed that the frequency of observer presence had no apparent impact on Pacific damsel bug behavior. This is the first documented test of the impact of observer presence in an insect system. To place our results in context, we reviewed 15 papers on the influence of observer presence in a range of animals. We established that just over half of these papers found evidence for an effect. Nevertheless, direct observations should be useful in further studies of Pacific damsel bug behavior, and researchers using direct observations to study the behavior of other animals should be cognizant of observer effects during design and interpretation of their study.     

2型糖尿病易感候选基因在世界不同人群中的多样性比较分析

近10年来兴起的全基因组关联分析（Genome-wide association study, GWAS）相关研究结果获得了大量与2型糖尿病相关的候选易感基因,了解这些候选基因在正常人群中的遗传多样性程度以及在不同人群间的遗传差异,不但有助于阐明2型糖尿病的遗传机理,而且对于今后在特定人群中进行2型糖尿病发病机制的深入研究具有指导意义。本研究通过对GWAS数据库和相关文献的搜索和整理确定了170个与2型糖尿病相关的基因或基因区域;随后基于千人基因组计划的全基因组测序数据对这些候选基因在世界范围内14个人群间的遗传多样性进行了比较分析;进一步确定了在人群间存在显著差异的易感基因,并分析了这些基因的多样性特征。在所研究的14个世界人群中,2型糖尿病候选易感基因的遗传多样性与基因组范围的平均水平没有显著差异;但其中8个易感基因IL20RA、RNMTL1-NXN、NOTCH2、ADRA2A-BTBD7P2、TBC1D4、RBM38-HMGB1P1、UBE2E2和PPARD在群体间呈现显著差异,其中最明显的是IL20RA基因 (FST=0.152),该易感基因在非洲人群和非非洲人群间存在显著等位基因频率和单倍型频率差异。14个人群中易感基因遗传结构差异的主要原因是由于非洲人群与非非洲人群之间的群体遗传结构的不同所造成的。进一步比较东西方人群间的2型糖尿病候选基因遗传结构差异,发现在东西方人群中同样存在明显的群体遗传结构差别,其中DGKB-AGMO(FST=0.173)和JAZF1(FST=0.182)是差异最显著的易感基因。本研究通过对群体间2型糖尿病易感基因遗传结构进行比较,鉴别出一些差异特别显著的易感基因,对今后2型糖尿病易感基因与不同人群间发病率和易感性差异的相关研究提供重要参考。     

Dietary fibers as emerging nutritional factors against diabetes: focus on the involvement of gut microbiota

Diabetes mellitus (DM) increases the risk of cardiovascular diseases and other secondary complications, such as nephropathy, neuropathy, retinopathy, etc. The important risk factors for the pathogenesis of DM are aging, family history, sedentary lifestyle, unhealthy dietary habits, and obesity. Evidence from epidemiological studies also indicates that DM is characterized by specific alterations in the human gut microbiota (GM). GM transplantation in rodents and humans revealed that a specific GM constituent can be the cause and not just the consequence of the DM condition and complications. These findings suggest a potential role of GM in human health, disease prevention, and treatment. Dietary intervention studies using dietary fibers (DFs) suggested that modulation of the GM can suppress the metabolic risk markers in humans. However, a causal role of GM in such studies remains unexplored. Long-term follow-up studies disclosed that the diet rich in insoluble and non-viscous fibers are responsible for DF-mediated antidiabetic activities, while soluble and viscous fibers have little influence on DM despite having a profound impact on glycemia. However, general conclusions cannot be drawn simply based on these findings. Long-term follow-up studies are urgently required in this area to explore the therapeutic potential of different DFs in treating DM and to delineate the exact role of GM involvement. Here we review and discuss the signature of GM during DM, antidiabetic activity of metformin via GM modulation, DFs from different sources and their antidiabetic activity, and the possible role of GM involvement.     

Using mass spectrometry to explore the neglected glycan moieties of the antiophidic proteins DM43 and DM64

The resistance of the opossum Didelphis aurita to Bothrops snake venoms is attributed to the opossum's antihemorrhagic (DM43) and antimyotoxic (DM64) acidic serum glycoproteins. The aim of this study was to characterize the N-glycosylation sites of these antiophidic proteins and to determine whether their glycans influence the biological activity measured by in vitro assays. Our experimental pipeline included the sequential enzymatic digestion of the inhibitors with two different proteinases (trypsin and endoproteinase Asp-N) and eventually with trypsin, peptide-N-glycosidase F (PNGase F) and endoproteinase Asp-N, used in that order. All of the peptide and protein samples were analyzed by MALDI-TOF/TOF MS. The results experimentally confirmed the putative N-glycosylation sites of DM43 (Asn23, Asn156, Asn160, and Asn175) and DM64 (Asn46, Asn179, Asn183, and Asn379). Following treatments with specific glycosidases, complex-type oligosaccharides containing galactose and sialic acid could be assigned to both proteins. The removal of these monosaccharide units by exoglycosidase digestion did not measurably affect the inhibitory activity. In contrast, partially deglycosylated DM43 treated with PNGase F under nondenaturing conditions was half as effective as native DM43. In conclusion, we have demonstrated that the contribution of the carbohydrate portion of these potentially therapeutic molecules, for their mechanism of action, should not be overlooked.     

Pregnancy loss and neonatal death in women with type 1 or type 2 diabetes mellitus

Background: Diabetes mellitus (DM) is known to be a significant risk factor for pregnancy loss, either through still-birth or late intrauterine death or as the result of severe congenital malformation. Improved glycemic control and other advances in care substantially reduced the incidence of pregnancy loss in women with type 1 DM in most countries by the 1970s. However, because of a greater prevalence of obesity since the 1980s, the emergence of type 2 DM in pregnancy has become a significant problem. Although more pregnancies now occur in women with type 2 DM than in those with type 1 DM in many locations, relatively little information has been published about pregnancy loss in type 2 DM.Objectives: This article examines the prevalence and causes of pregnancy loss in type 1 and type 2 DM and identifies factors in addition to glycemic control that may influence pregnancy outcome.Methods: A MEDLINE search was conducted for recent literature on pregnancy loss in DM. Series reporting >200 pregnancies in type 1 DM and/or >100 pregnancies in type 2 DM were included.Results: Thirty-four studies were identified (15 in type 1 DM [1997-2007], 19 in type 2 DM [1986-2007]). In type 1 DM, major congenital anomalies now account for ~50% of pregnancy losses, and all-cause perinatal mortality remains higher than in the general population. Several studies have suggested that the perinatal mortality rate is higher in type 2 DM than in type 1 DM. Factors other than glycemic control probably explain this phenomenon: women with type 2 DM typically are older and more obese, and they come from disadvantaged communities—all risk factors for pregnancy loss, particularly late intrauterine death and chorioamnionitis. In some women, type 2 DM may be recognized for the first time during pregnancy; pregnancies in these women carry the same risks of pregnancy loss as those in women with established DM.Conclusions: Demographic changes in the prevalence of obesity suggest that the prevalence of type 2 DM in pregnancy will almost certainly increase. Although meticulous glycemic control is undoubtedly important in achieving good pregnancy outcomes, clinicians should be aware of the multiple risk factors faced by women with DM.     

Direct Compression Behavior of Low- and High-Methoxylated Pectins

The objective of this study was to evaluate possible usefulness of pectins for direct compression of tablets. The deformation behavior of pectin grades of different degree of methoxylation (DM), namely, 5%, 10%, 25%, 35%, 40%, 50%, and 60% were, examined in terms of yield pressures (YP) derived from Heckel profiles for both compression and decompression and measurements of elastic recovery after ejection. All pectin grades showed a high degree of elastic recovery. DM 60% exhibited most plastic deformation (YP 70.4 MPa) whereas DM 5% (104.6 MPa) and DM 10% (114.7 MPa) least. However, DM 60% gave no coherent tablets, whereas tablet tensile strengths for DM 5% and DM 10% were comparable to Starch 1500^®. Also, Heckel profiles were similar to Starch 1500^®. For sieved fractions (180–250 and 90–125 μm) of DM 25% and DM 40% originating from the very same batch, YPs were alike, indicating minor effects of particle size. These facts indicate that DM is important for the compaction behavior, and batch-to-batch variability should also be considered. Therefore, pectins of low degree of methoxylation may have a potential as direct compression excipients.     

Ubiquitination of human leukocyte antigen (HLA)-DM by different membrane-associated RING-CH (MARCH) protein family E3 ligases targets different endocytic pathways

HLA-DM plays an essential role in the peptide loading of classical class II molecules and is present both at the cell surface and in late endosomal peptide-loading compartments. Trafficking of DM within antigen-presenting cells is complex and is, in part, controlled by a tyrosine-based targeting signal present in the cytoplasmic tail of DMβ. Here, we show that DM also undergoes post-translational modification through ubiquitination of a single lysine residue present in the cytoplasmic tail of the α chain, DMα. Ubiquitination of DM by MARCH1 and MARCH9 induced loss of DM molecules from the cell surface by a mechanism that cumulatively involved both direct attachment of ubiquitin chains to DMα and a functional tyrosine-based signal on DMβ. In contrast, MARCH8-induced loss of surface DM was entirely dependent upon the tyrosine signal on DMβ. In the absence of this tyrosine residue, levels of DM remained unchanged irrespective of whether DMα was ubiquitinated by MARCH8. The influence of MARCH8 was indirect and may have resulted from modification of components of the endocytic machinery by ubiquitination.