Altered chromatin landscape in circulating T follicular helper and regulatory cells following grass pollen subcutaneous and sublingual immunotherapy

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我国医疗质量安全不良事件分类的思考

患者安全问题已经成为世界各国医疗质量管理关注的焦点,从国家层面对医疗质量安全不良事件进行统一定义和分类具有重要意义。通过总结世界卫生组织、美国、英国以及我国目前不良事件分类及严重程度分级情况,结合我国相关上报数据,分析存在问题,建议国家及各级卫生行政部门发挥引导推动作用,医疗机构利用现有国家医疗质量安全相关平台,参考借鉴相关分类,开展同质化医疗质量安全管理工作。     

Melde- und Informationssystem für bedeutsame Vorkommnisse bei Strahlenanwendungen in der Medizin: Struktur,Zuständigkeiten und Meldekriterien

The increasing frequency and complexity of medical radiation exposures to humans inevitably result in higher risks of harmful unintended or accidental radiation exposures. To ensure a high level of protection and its continuous improvement, the Directive 2013/59/Euratom thus requires to systematically record and analyze both events and near-miss events as well as, in the case of their significance, to disseminate information regarding lessons learned from these events promptly and nationwide to improve radiation protection in medicine. These requirements have been transposed into German legislation by the new radiation protection law and radiation protection ordinance that entered into force simultaneously on December 31^th, 2018. The reporting and information system as provided by these regulations as well as the tasks, duties and powers of the parties involved are presented in the first part of this review article. In the second part, the established application-specified criteria for the significance – and thus the notification requirement - of (near-miss) events are itemized and explicated.     

Adequate sample size for developing prediction models is not simply related to events per variable

ObjectivesThe choice of an adequate sample size for a Cox regression analysis is generally based on the rule of thumb derived from simulation studies of a minimum of 10 events per variable (EPV). One simulation study suggested scenarios in which the 10 EPV rule can be relaxed. The effect of a range of binary predictors with varying prevalence, reflecting clinical practice, has not yet been fully investigated.Study Design and SettingWe conducted an extended resampling study using a large general-practice data set, comprising over 2 million anonymized patient records, to examine the EPV requirements for prediction models with low-prevalence binary predictors developed using Cox regression. The performance of the models was then evaluated using an independent external validation data set. We investigated both fully specified models and models derived using variable selection.ResultsOur results indicated that an EPV rule of thumb should be data driven and that EPV ≥ 20 ​ generally eliminates bias in regression coefficients when many low-prevalence predictors are included in a Cox model.ConclusionHigher EPV is needed when low-prevalence predictors are present in a model to eliminate bias in regression coefficients and improve predictive accuracy.     

Big Events in Greece and HIV Infection Among People Who Inject Drugs

Big Events are processes like macroeconomic transitions that have lowered social well-being in various settings in the past. Greece has been hit by the global crisis and experienced an HIV outbreak among people who inject drugs. Since the crisis began (2008), Greece has seen population displacement, inter-communal violence, cuts in governmental expenditures, and social movements. These may have affected normative regulation, networks, and behaviors. However, most pathways to risk remain unknown or unmeasured. We use what is known and unknown about the Greek HIV outbreak to suggest modifications in Big Events models and the need for additional research.     

Development of the Inventory Management and Tracking System (IMATS) to Track the Availability of Public Health Department Medical Countermeasures During Public Health Emergencies

Objective

To bridge gaps identified during the 2009 H1N1 influenza pandemic by developing a system that provides public health departments improved capability to manage and track medical countermeasures at the state and local levels and to report their inventory levels to the Centers for Disease Control and Prevention (CDC).

Materials and Methods

The CDC Countermeasure Tracking Systems (CTS) program designed and implemented the Inventory Management and Tracking System (IMATS) to manage, track, and report medical countermeasure inventories at the state and local levels. IMATS was designed by CDC in collaboration with state and local public health departments to ensure a “user-centered design approach.” A survey was completed to assess functionality and user satisfaction.

Results

IMATS was deployed in September 2011 and is provided at no cost to public health departments. Many state and local public health departments nationwide have adopted IMATS and use it to track countermeasure inventories during public health emergencies and daily operations.

Discussion

A successful response to public health emergencies requires efficient, accurate reporting of countermeasure inventory levels. IMATS is designed to support both emergency operations and everyday activities. Future improvements to the system include integrating barcoding technology and streamlining user access. To maintain system readiness, we continue to collect user feedback, improve technology, and enhance its functionality.

Conclusion

IMATS satisfies the need for a system for monitoring and reporting health departments’ countermeasure quantities so that decision makers are better informed. The “user-centered design approach” was successful, as evident by the many public health departments that adopted IMATS.     

≥75岁急诊心房颤动患者的预后分析——中国急诊心房颤动研究的亚组分析

目的:了解老年（年龄≥75岁）急诊心房颤动（房颤）患者的预后情况,分析不良预后的危险因素。方法:2009年至2011年在全国20家医院连续入选急诊就诊、年龄≥75岁房颤患者为本研究对象,收集患者基线资料和治疗情况,并进行1年随访,主要终点事件为全因死亡,次要终点事件为心血管死亡、卒中、大出血事件及主要不良事件。应用单因素和多因素Cox回归模型分析上述事件的独立危险因素。结果:共入选766例老年急诊房颤患者,年龄(80.76±4.66)岁,女性占56.9%。1年的全因病死率为24.3%,心血管病死率为12.8%,卒中发生率为10.6%,主要不良事件发生率33.6%,再入院率32%。多因素Cox回归模型分析显示年龄（ HR1.073,95% CI 1.042~1.105）、心率（ HR 1.008,95% CI 1.002~1.013）、痴呆/认知障碍史（ HR 1.849,95% CI 1.016~3.365）、既往慢性阻塞性肺疾病史（ HR 1.824,95% CI 1.303~2.551）为老年房颤患者1年死亡的独立危险因素。女性（ HR 1.664,95% CI 1.036~2.675）、高血压病史（ HR 2.035,95% CI 1.080~3.836）、痴呆/认知障碍史（ HR 2.773,95% CI 1.220~6.302）、为老年房颤患者1年卒中的独立危险因素。 结论:老年急诊房颤患者的预后较差,年龄、心率、痴呆/认知障碍史、慢性阻塞性肺疾病史是老年急诊房颤患者1年全因死亡和主要不良事件的独立危险因素;女性、高血压病史、痴呆/认知障碍史为老年急诊房颤患者1年卒中的独立危险因素。     

Prognostic value of frontal QRS-T angle in predicting survival after primary percutaneous coronary revascularization/coronary artery bypass grafting for ST-elevation myocardial infarction

BackgroundFrontal QRS-T angle (FQRST) has previously been correlated with mortality in patients with stable coronary artery disease, but its role as survival predictor after ST-elevation myocardial infarction (STEMI) remains unknown.MethodsWe evaluated 267 consecutive patients with STEMI undergoing reperfusion or coronary artery bypass grafting. Data assessed included demographics, clinical presentation, electrocardiograms, medical therapy, and one-year mortality.ResultsOf 267 patients, 187 (70%) were males and most (49.4%) patients were Caucasian. All-cause mortality was significantly higher among patients with the highest (101–180°) FQRST [28% vs. 15%, p = 0.02]. Patients with FQRST 1–50° had higher survival (85.6%) compared with FQRST = 51–100° (72.3%) and FQRST = 101–180° (67.9%), [log rank, p = 0.01]. Adjusting for significant variables identified during univariate analysis, FQRST (OR = 2.04 [95% CI: 1.31–13.50]) remained an independent predictor of one-year mortality. FQRST-based risk score (1–50° = 0 points, 51–100° = 2 points, 101–180° = 5 points) had excellent discriminatory ability for one-year mortality when combined with Mayo Clinic Risk Score (C statistic = 0.875 [95%CI: 0.813–0.937]. A high (>4 points) FQRST risk score was associated with greater mortality (32% vs. 19%, p = 0.02) and longer length of stay (6 vs. 2 days, p < 0.001).ConclusionFQRST represents a novel independent predictor of one-year mortality in patients with STEMI undergoing reperfusion. A high FQRST-based risk score was associated with greater mortality and longer length of stay and, after combining with Mayo Clinic Risk Score, improved discriminatory ability for one-year mortality.     

The Therapeutic Use of Analgesics in Patients With Liver Cirrhosis: A Literature Review and Evidence-Based Recommendations

Context:

Pain management in cirrhotic patients is a major clinical challenge for medical professionals. Unfortunately there are no concrete guidelines available regarding the administration of analgesics in patients with liver cirrhosis. In this review we aimed to summarize the available literature and suggest appropriate evidence-based recommendations regarding to administration of these drugs.

Evidence Acquisition:

An indexed MEDLINE search was conducted in July 2014, using keywords “analgesics”, “hepatic impairment”, “cirrhosis”, “acetaminophen or paracetamol”, “NSAIDs or nonsteroidal anti-inflammatory drugs”, “opioid” for the period of 2004 to 2014. All randomized clinical trials, case series, case report and meta-analysis studies with the above mentioned contents were included in review process. In addition, unpublished information from the Food and Drug Administration are included as well.

Results:

Paracetamol is safe in patients with chronic liver disease but a reduced dose of 2-3 g/d is recommended for long-term use. Non-steroidal anti-inflammatory drugs (NSAIDs) are best avoided because of risk of renal impairment, hepatorenal syndrome, and gastrointestinal hemorrhage. Most opioids can have deleterious effects in patients with cirrhosis. They have an increased risk of toxicity and hepatic encephalopathy. They should be administrated with lower and less frequent dosing in these patients and be avoided in patients with a history of encephalopathy or addiction to any substance.

Conclusions:

No evidence-based guidelines exist on the use of analgesics in patients with liver disease and cirrhosis. As a result pain management in these patients generates considerable misconception among health care professionals, leading under-treatment of pain in this population. Providing concrete guidelines toward the administration of these agents will lead to more efficient and safer pain management in this setting.