ObjectiveTo introduce the role of three dementional computed tomograph (3D-CT) for patients underwent transcatheter aortic valve implantation (TAVI) procedure in perioperative evaluation. MethodsFrom April 2014 to June 2015, we retrospectively analyzed clinical data of 28 patients with severe aortic stenosis underwent successful TAVI procedure using new second-generation device, who were enrolled in this study including 12 males and 16 females at mean age of 72.8±4.5 years. We used 3D-CT to get the perioperative relative evaluation, including valve morphology and calcification degree, annular diameter, aoronary ostium height, ascending aorta, aortic sinus diameter, left ventricular-aortic angle, optimal intraoperative angiogram projection angle. Based on the evaluation by 3D-CT image, the prosthesis size, balloon size, best intraoperative imaging projection angle and approach of apex were then chosen. ResultsAll patients with severe aortic stenosis underwent successful TAVI procedure with mean logistic Euro-SCORE I:26.2%±7.9%. CT image revealed that mean aortic annular diameter was 24.6±1.8 mm with mean valve prosthesis size 25.8±1.1 mm and pre-dilation balloon size 23.1±1.2 mm and 76.8% patients were of tricuspid aortic valve with severe calcification and 25% patients were of asymmetric calcification. Optimal intraoperative angiogram image was achieved in 92.9% patients with the help of preoperative CT image. There was a statistic difference in mean transvalvular gradient after valve implantation (54.1±15.3 mm Hg vs. 13.1±8.5 mm Hg, P<0.05). And there was no mortality or severe complication postoperatively. Conclusion3D-CT image palys an important role during perioperative evaluation of TAVI procedure and it can be helpful for Chinese doctors to operate TAVI successfully.
Objective To assess the public health impacts and needs, to evaluate performance of anti-epidemic efforts after Lushan earthquake, so as to provide references for the following anti-epidemic work. Methods The day of earthquake occurrence was defined as the first day after earthquake. We collected information and data from the Sichuan Provincial Government, the National Health and Family Planning Commission of the People’s Republic of China, the Health Department of Sichuan Province, Sichuan Center for Disease Control and Prevention, and then we compared the situations of disaster, public health situation in stricken area, emergency response, resource deployment, etc. with those after Wenchuan earthquake in 2008, in order to evaluate the performance of anti-epidemic response during 2 weeks, clarify current situations and demands, and offer a proposal for the following work. Results Emergency response was conducted immediately after the Lushan earthquake. The counterpart assistance was considered at the beginning of team arrangement. The number and professional structure of rescue participants were planned according to needs. Three days after earthquake, anti-epidemic staff arrived at every involved county, town, and even village, which achieved full rescue coverage of locations and interventions. The staff helped reconstruct disease surveillance system, protect source of drinking water and environmental hygiene, etc., which resulted in progressive achievement. Two weeks after the earthquake there were no outbreak and public health emergency event occurred in stricken area. Conclusion The anti-epidemic efforts after Lushan earthquake inherit and develop the lessons from Wenchuan earthquake in 2008. Emergency response is timely, orderly, scientific, and moderate. The deployment of policies, technologies and resources has already been completed during two weeks. Anti-epidemic efforts achieve preliminary results. We suggest that key issues of further work should be the implementation of policies, strategies and measures, such as health management at relocation sites, water and food hygiene, disease monitoring, prevention and control, mass vaccination, scientific disinfection, and health education, in order to improve long-efficacy mechanism and stabilize work performance.
Objective To investigate the effects of evidence-based medicine (EBM) course on clinical medical students and to propose teaching advice. Methods Using a predesigned questionnaire, we conducted an investigation on the literature retrieval, knowledge of EBM terms, and subject attitude of clinical 5-year and 7-year medical students before and after EBM course, and then an interview was performed to collect the opinions of the students. Data was statistically analyzed. Results After the course, average reading time and frequency of literature retrieval increased significantly compared to the situation before EBM course (Plt;0.05). Knowledge levels of main EBM terms related to practice increased significantly (Plt;0.05). 5-year medical students’ ability of literature appraisal also increased (Plt;0.05). In this interview, these students suggested that course time of literature retrieval and screening should increase and medical statistics should be reviewed. Conclusion Through the study of EBM course, both knowledge and attitude of students changed a lot, and combining case teaching with EBM course has a better teaching effect. Learning the concepts and techniques of EBM for clinical medical students can help them apply medical research evidence correctly in clinical practice, and train their self-learning ability.
This investigation analyzes the management of medical schools merged with comprehensive universities through internet search and research review in order to reveal management model and effect of the merger. The conclusion is safely reached that governance models are divided into two different patterns: centralized management and decentralized management. Eight universities, representing the two models, were selected and evaluated comprehensively. Among them, the universities that carried out decentralized management have greater development after the merger based on a quality comparison concerning freshmen, faculty, teaching and research between the two patterns. In China, decentralized management in comprehensive universities is more beneficial to the development of medical schools
Objective To comprehensively summarize and analyze the status quo, assessing contents and problems of the assessment studies on appropriate health technology in China. Methods With the search terms and strategies predefined by repeated discussion and pre-retrieval, all literature on appropriate health technology assessment in China published from October 1949 to March 2012 were searched in the following databases: CBM, VIP, CNKI and WanFang Data. According to the inclusion and exclusion criteria, two reviewers independently screened literature, and extracted and cross-checked data. Disagreements were resolved by discussion or by involving a third researcher. The qualitative synthesis method was used to analyze the studies. Results Among total 174 included studies, 117 were cross-sectional. Targeted populations were patients and community residents who had received the service or treatment of appropriate health technology, as well as the grassroots medical staffs and workers from marketing organization who had used or carried out the appropriate health technologies. Appropriate health technologies mainly contained four fields of appropriate health technology: traditional Chinese medicine, western medicine, family planning services and community health services. Most types of diseases involved in those technologies were circulatory system diseases, and high blood pressure was highly concerned. The contents of appropriate health technology assessment mainly included 6 aspects: effectiveness, acceptability, economic characteristics, requirements, safety and technical specific property. The results of the included studies indicated that, most assessments focused on just one aspect, and were lack of comprehensive evaluation. The indexes used in each assessment covered a far too wide range, and was lack of unified index and standards. Conclusion Current studies show that the fields of appropriate health technology assessment distribute widely; the assessment content is simple and lack of comprehensive evaluation; the assessment index system has no unified standard; and the study design methods are different and lack of high quality study design. So it is necessary to conduct high quality assessment studies, establish scientific assessment index system, and systematically assess appropriate health technology, so as to provide more scientific basis for health decision makers.
GRADE（Grades of Recommendation, Assessment, Development，and Evaluation）方法为卫生保健中的证据质量评价与推荐强度评级提供指导。对那些为系统评价、卫生技术评估及临床实践指南总结证据的人而言，GRADE具有重要意义。GRADE提供了一个系统而透明的框架用以明确问题，确定所关注的结局，总结针对某问题的证据，以及从证据到形成推荐或作出决策。GRADE方法的广泛传播与应用，获全球50余个组织认可，这些组织大多有很强的影响力（http://www.gradeworkinggroup.org/），足以证明该工作的重要性。本文介绍临床流行病学杂志将刊出的20篇系列文章，为如何使用GRADE方法提供指导。
Objective To assess the effectiveness and safety of one kind of ACEI—Ramipril, for providing proofs for clinical implement and we also tried to explore the practical method of evidence-based drug assessment. Method By using the methods and principles of systematic review (SR), and health technology assessment (HTA), we searched Medline and Cochrane Library, together with related materials provided by pharmaceutics and collected all the published clinical research reports on Ramipril. Based on principles of SR and HTA, we assessed all the included reports comprehensively. Results We totally collected 214 articles about Ramipril, in which there were 18 articles meeting the inclusion criteria and 31 139 patients were enrolled in these studies. The research contents include: hypertension, diabetes mellitus, heart failure, myocardial infarction, nephropathy and secondary prevention for cardio-cerebral vascular disease. Conclusion According to our clinical evidence assessment, Ramipril is an effective, safe and easy to take drug and is worthy to spread.
To overview the methodology and procedure used in developing evidence-based guidelines for migraine headache, the article described the two procedures systematically: 1. the Methods used in the Agency for Health Care Policy and Research’s Technical Reviews. 2. US Headache Consortium’s Methods used in developing clinical guidelines
Background In the latter of 20th century, a global growth in allergic diseases has been witnessed, accompanying with spring-out of therapeutic drugs. However, trials did not clarify the comparative effectiveness and pharmaceutical economics of these agents. Severe adverse drug effects have been reported increasingly in the last few years. These made it difficult for clinical practice and selection of national essential drugs. Objective To assess astemizole, loratadine, cetirizine and tefenadine for allergic rhinitis (AR) and urticaria in terms of effectiveness, heart-related drug adverse effects and pharmaceutical economics. Search strategy Cochrane Library, Medline, Embase and Chinese Biomedical Database will be searched. Additional database should be searched for safety and economic studies. Selection Criteria The publication languages are restrained to English and Chinese. 1) Effectiveness: high-quality randomized controlled trials (RCTs) and systematic Reviews (SRs)/ meta-analysis for AR and uritcaria are included, with comparisons restrained to among these four drugs; 2) Safety: a hierarchy of evidences of these four drugs for allergic diseases are included. 3) Economical evaluation: cost-effectiveness and cost-utility assessment of these four drugs for AR and urticaria should be included. Methods of review data extraction sheet and quality appraisal table are separately designed. QUOROM STATEMENT and Jadad Scale are applied, respectively, to SRs and RCTs. Two reviewers independently select the studies, appraise the quality and extract the data. Any disagreement is solved by discussion. Data analysis Fixed effect model is first applied. Sensitivity analysis is employed to study the heterogeneity between trials. Randomized effect model is alternatively used when compromised.
The re-evaluation of the effectiveness of new drugs is of great importance when they are in post-market for there exist some limitations in clinical trials before these drugs are put on the market. The large sample multi-centre randomized controlled trial is the best method of re-evaluation of the effectiveness of new drugs. It could appropriately evaluate not only the large-term efficacy and safety of drugs, but the treatment effect on the survival state and its complications as well. This method will also lead to a great social amp; economic benefit.