Interstitial lung disease is the most common pulmonary complication in patients with inflammatory myopathy, with a high case fatality rate, unknown pathogenesis, and complex clinical manifestations, and the treatment is difficult. Early and timely treatment can improve the patient’s clinical symptoms and inhibit the development of the disease. The present treatment protocols can be mainly summarized as the commonly used drugs (corticosteroids, azathioprine, cyclophosphamide, mycophenolate mofetil, and intravenous immunoglobulin) and new drugs (cyclosporin A, tacrolimus, biological agents, and anti-fibrosis drug), etc. In this paper, the treatment progress of inflammatory myopathy-related interstitial lung disease and different myositis antibody-related interstitial lung disease in recent years at home and abroad is reviewed, so as to provide a basis for clinical treatment.
Causal inference is one of the main goals of medical research. However, due to the lack of an in-depth understanding of the theory of causal inference, researchers tend to blindly use multiple statistical methods to analyse the same question to enhance the credibility of the results, which leads to problems in interpretation of the analysis results. Based on the three basic concepts of potential outcomes, causal effects, and distributive mechanisms of the causal inference counterfactual framework, this paper introduced six main target effects in causal inference and discussed their comparability to help researchers understand the principle of causal inference and correctly interpret and compare research results to avoid misleading conclusions.
Objective To investigate the impact of bone marrow mesenchymal stem cell transplantation on a rat model of experimental autoimmune uveitis (EAU) and analyze its immune regulatory mechanisms in vivo.Methods Eighteen Lewis rats were randomly divided into three groups: model control group, intervention group and normal control group, six animals in each group. Human retinal S-antigen peptide (HS-AgP35, 1 mg/ml) was mixed and emulsified with complete Freundprime;s adjuvant and injected into hind foot pad of rats on the first and eighth day to establish the animal model of EAU. For bone marrow mesenchymal stem cell transplantation, 1 ml of cell suspension (2times;106 cells/ml) was injected into tail vein of the intervention group rats on the first day when the emulsified S-antigen was injected. EAU manifestation, pathological change and IFN-gamma; level were evaluated and compared among those three groups after two weeks. Results No abnormal signs were found in the eyes of rats in normal control group. The manifestation grading of the intervention group (two rats at grade 0, three rats at grade 0.5, one rat at grade one) was significantly different from the model control group (one rat at grade one, one rat at grade two, three rats at grade three, one rat at grade four) (P=0.015). The retina of rats in normal control group was ordinary under light microscope. The histopathologrical grading of the intervention group (one rat at grade 0, four rats at grade 0.5,one rat at grade one) and the model control group (four rats at grade three, two rats at grade four) was also statistically different (P＜0.01). Furthermore, the IFN-gamma; level in peripheral blood of the intervention group rats declined significantly compared to the model control group (t=9.0574, P=0.01). Conclusions Bone marrow mesenchymal stem cells can inhibit EAU significantly, possibly by lowering the level of IFN－gamma;, thereby reduce the severity of uveitis and improve the condition of uveitis in rats.
Systematic reviews provide information about the effectiveness of interventions by identifying, appraising, and summarizing the results of otherwise unmanageable quantities of primary research in an effort to provide valid, reliable evidence for health decision-making and clinical practice. They differ from traditional reviews produced by "content experts" in that they use a replicable, scientific and explicit approach that seeks to minimize bias. They are particularly useful when there is uncertainty regarding the potential benefits or harm of an intervention and when there are variations in practice. Poor quality systematic reviews may mislead policy-makers and clinicians. This paper will introduce the basic methods of Cochrane systematic reviews in order to help those who are interested in conducting systematic review.
Improving the rate of pathogen examination before antibiotic treatment is of great significance for clarifying pathogen diagnosis and curbing bacterial resistance, and is also one of the important goals for improving national medical quality and safety. In response to the current problem of low pathogen examination rates, Chengdu Women’s and Children’s Central Hospital adopts a FOCUS-PDCA model, has explored measures such as current situation investigation, root cause analysis, intervention plan formulation, countermeasure implementation, and effect evaluation to improve the rate of pathogen examination before antibiotic treatment in inpatients. This article mainly elaborates on the above model, which has practical significance for ensuring the rational use of antibiotics in inpatients.
Objective To explore the challenges of training workshops on Cochrane Systematic Review (CSR) in 2006–2008 and to identify strategies to meet better the needs of the participants. Methods We designed a quantitative survey for all participants and collected their feedback on the arrangements and challenges of the workshop, and on their needs. Results The overall response rate was 82.6% (138/167). The training on CSR evaluated more highly from 2006 to 2008. A total of 167 registered participants from 21 provinces in China took part, and 71.3% (119/167) of them were graduate students. Only 10.9 % (15/138) selected their topics before training. After training, most of the participants were satisfied with the arrangement of the workshop, and thought the most helpful contents were: meta-analysis and statistics 83.7% (113/135), trials selection, inclusion and extraction 79.4% (108/136), literature evaluation 78.1% (107/137), and results analysis and explanation 72.8% (99/136). Some participants desired more time for practical exercises and for advice on keeping track of the development of their reviews. Conclusion The training on CSR has been gradually improved in the past 3 years. Cochrane systematic reviews have become an important research topic for graduate students in this time in China. Most of the participants benefit from the CSR workshop. More time on exercises is needed and the trainees’ further development should be followed up.
Electroencephalogram (EEG) classification for brain-computer interface (BCI) is a new way of realizing human-computer interreaction. In this paper the application of semi-supervised sparse representation classifier algorithms based on help training to EEG classification for BCI is reported. Firstly, the correlation information of the unlabeled data is obtained by sparse representation classifier and some data with high correlation selected. Secondly, the boundary information of the selected data is produced by discriminative classifier, which is the Fisher linear classifier. The final unlabeled data with high confidence are selected by a criterion containing the information of distance and direction. We applied this novel method to the three benchmark datasets, which were BCIⅠ, BCIⅡ_Ⅳ and USPS. The classification rate were 97%,82% and 84.7%, respectively. Moreover the fastest arithmetic rate was just about 0.2 s. The classification rate and efficiency results of the novel method are both better than those of S3VM and SVM, proving that the proposed method is effective.
Objective To understand the impact of an infection risk control measures implemented in the non-clinical areas of a hospital on the visitors during the coronavirus disease 2019 (COVID-19) epidemic period, in an attempt to provide scientific evidence for the improvement and optimization of subsequent prevention and control measures. Methods The convenience sampling method was used to investigate and analyze all the personnel who came to the hospital for treatment or work on February 22, 2020. Collect the influence of the personnel coming to the hospital on the sense of security, medical behavior (work) and the acceptance of the measures arising from the implementation of infection control measures such as sub-regional management of people and vehicles, body temperature screening during admission, and sub-channel management of hospital visitors in the non-clinical areas of the hospital. ResultsA total of 1 098 patients/family members were included. 70.13% (770/1 098) of the patients/family members thought that visiting the hospital during the COVID-19 epidemic would make them feel uneasy; 90.26% (991/1 098) of the patients/family members could accept the body temperature screening during admission, 96.99% (1 065 / 1 098) of the patients/family members could accept the sub-regional management of people and vehicles, and 100.00% (1 098/1 098) of the patients/family members could accept the sub-channel management of hospital visitors in the non-clinical areas of the hospital; 71.22% (782/1 098) of the patients/family members thought that the peripheral prevention and control measures had increased the sense of security in medical treatment, and they would continue to choose this hospital for the next time if necessary. A total of 2 543 employees were included. 37.55% (955/2543) of the employees felt uneasy because they were afraid of being infected in the hospital; 93.12% (2 368/2 543) of the employees could accept the establishment of a dedicated channel for staff admission, 99.25% (2 524/2 543) of the employees could accept the temperature screening at the entrance of the dedicated channel, and 97.48% (2 479/2 543) of the employees could accept the subregional management measures. 82.54% (2 099/2 543) of the employees thought that the peripheral prevention and control measures would not affect their work. Conclusions Implementing a series of prevention and control measures in the non-clinical areas during the emergency response state can improve the sense of security of the patients, family members of the patients and employees who come to the hospital to some extent. In the future, measures such as strengthening publicity and education, improving facilities, perfecting the planning and design, providing the complete information, and strengthening supervision, can be taken to further optimize the risk control of infection in non-clinical areas and improve the acceptance of personnel coming to the hospital.