Objective To analyze X-ray plain film and CT signs of giant cell tumor of bone.Methods Imaging findings of giant cell tumor in 53 cases proved surgically and pathologically were retrospectively analyzed.Results 39 cases appeared as expensive cystic and eccentric destruction,osteolytic destruction 14 cases.Bone crests were usually seen in (39/53).Most of lesions did not have bone septations on CT image.The borders of destructive bone were clear and existed complete or incomplete sclerotic borders in 19 on CT image.The inner soft tissues of lesions were heterogeneous in most of the cases.Fluid-fluid level could be seen in 11 cases.The soft tissue masses outside the bone were demonstrated in the majority cases with discontinuous bone shell.Conclusion CT is more helpful than X-ray plain films in diagnosis of giant cell tumor of bone.

Objective To study X-ray and CT diagnosis and Differential diagnosis of nonossifying fibroma.Methods 29 cases of nonossifying fibroma proved by pathology were included in this paper.29 cases underwent radiography and 12 cases underwent CT scan.There were 22 male and 7 female,with age ranged from 5~59 years(mean age 21.3 years),X-ray and CT findings of tumors were analysed.Results The tumors were located in long bone in 27 cases,in which 17 cases were located in metaphses,2 cases in diaphyses,8 cases in bone end and 2 cases in irregular bone.The maximum diameter of tumors ranged from 0.5~7 cm.The tumors were round,oral or mild lobular in 21 cases,the tumors were showed sclerotic borders in 26 cases.Septum was demonstrated in 22 cases on X-ray plain films,but only 2 cases on CT.Bone expansion was showed in 13 cases.Conclusion Most of nonssifying fibroma have characteristic X-ray and CT findings,the diagnosis be identified by X-ray and CT before operation.

Common spatial pattern (CSP) is a very popular method for spatial filtering to extract the features from electroencephalogram (EEG) signals, but it may cause serious over-fitting issue. In this paper, after the extraction and recognition of feature, we present a new way in which the recognition results are fused to overcome the over-fitting and improve recognition accuracy. And then a new framework for EEG recognition is proposed by using CSP to extract features from EEG signals, using linear discriminant analysis (LDA) classifiers to identify the user's mental state from such features, and using Choquet fuzzy integral to fuse classifiers results. Brain-computer interface (BCI) competition 2005 data sets IVa was used to validate the framework. The results demonstrated that it effective ly improved recognition and to some extent overcome the over-fitting problem of CSP. It showed the effectiveness of this framework for dealing with EEG.
Algorithms ; Brain-Computer Interfaces ; Discriminant Analysis ; Electroencephalography ; Humans

Objective To investigate the inhibition rate of cell proliferation, cell apoptosis rate and their effects on the cell cycle proceeding of the SSMC7721 cell line when 5-FU combined with thermotherapy is induced into the cells, and then provide theoretical bases to the combined therapy of hepatocellular carcinoma. Methods The inhibition rate of cell proliferation was detected by the MTT under different conditions, the cell cycle proceeding and the cell apoptosis rate was detected by flow cytometry and the subcellular structure was detected by the electronmicroscope. Results The cell inhibition rate of the thermotherapy group, 5-FU group and the combinedgroup were 18.4% ,28. 3% and 52. 7% ,respectively. The inhibition rates in the latter two groups were significantly different to the thermotherapy group. The results of flow cytometry showed that the cell numbers increased in G1 stage decreased in S stage,and increased in G2/M stage;the cell apoptosis rate increased. There was significant difference between different groups(P ＜ 0.01 or P ＜0.05). The results of the electronmicroscop showed that the nuclear chromatins agglutinated in the borderline and the mitochondriums became swelled. Conclusions The 5-FU combined with thermotherapy could significantly improve the inhibition rate of cell proliferation, inhibit the cell cycle proceeding from G1 stage to S stage, and induce cells apoptosis and change the subcellular structures in the SSMC7721 cell line.

Due to the insufficient education of medical ethics and tending to medical moral educa-tion, the residents lack the ability to make ethical decisions. Therefore, we applied Four Topics method in the clinical ethics training of residents. The clinical ethics training was divided into three stages, and each stage had different training content and objectives. Dongyang People's Hospital adopted the form of lectures and panel discussions. During the group discussion, the group leader was in charge of case preparation, which came from clinical practice, and then all members applied the Four Topics method to analyze and discuss the ethical conflicts, and make the ethical decision. Through this process, residents' ability to solve ethical problems in clinical practice was enhanced.

[ ABSTRACT] AIM:To investigate the effect of phycocyanin on the apoptosis of human laryngeal cancer HEP-2 cells and to explore the inhibitory mechanism of phycocyanin to tumor.METHODS:Highly purified phycocyanin was ex-tracted from spirulina.The effects of phycocyanin at different concentrations on the growth of human laryngeal cancer HEP-2 cells were detected by MTT assay.In addition, the cell structures were observed under electron microscope.The cell ap-optosis was analyzed by flow cytometry.The production of reactive oxygen species ( ROS) was measured by flow cytometry. Enzymatic activities of caspase-3,-8 and-9 were measured by chemical colorimatry.The expression of Bax, Bcl-2, Fas, P53, caspase-3 and caspase-9 at mRNA and protein levels was determined by RT-PCR and Western blot.RESULTS:MTT test confirmed that phycocyanin inhibited the cell activity of HEP-2 cells with time and dose dependent manners.The result of electron microscope observation and flow cytometry indicated that phycocyanin induced the apoptosis of HEP-2 cells.The intracellular content of ROS was increased.The activities of caspase-3, -8 and -9 were increased.RT-PCR showed that the mRNA expression of Bax, Fas, P53, caspase-3, caspase-9 was increased and Bcl-2 was decreased.The results of Western blot were consistent with the results of RT-PCR.CONCLUSION:Phycocyanin might induce apoptosis of HEP-2 cells by down-regulating Bcl-2, up-regulating Bax, Fas and P53, and the transduction of apoptotic signals in the human laryngeal cancer cells.

Education of evidence-based medicine in clinical research is important in enhancing primary hospital clinical research capacity and quality.Dongyang People's Hospital of Zhejiang Province has carried out evidence-based medicine education and training,and greatly improved the performance of clinical research and development of scientific researchers.

Clinical thinking of Clinicians in Dongyang People's Hospital is gradually shifting from ‘empirical medicine’ to ‘evidence-based medicine’ after popularizing of evidence-based medicine, training core members and implementing multi-layered, multi-channeled, comprehensive and sustainable resident doctor training mode with clear steps and purposes within three years. This paper discussed on reasonable clinical practice of evidence-based medicine in primary hospital and provided realistic basis for the further development and improvement of training of evidence-based medicine in primary hospital.

Objective:Our study aims to predict acute kidney injury (AKI) in acute myocardial infarction (AMI) by establishing a random forest model.Methods:By using the clinical database from affiliated Dongyang Hospital of Wenzhou Medical University, a total of 1 363 AMI cases were included. Then, 75% of participants were analyzed as training subsets and the remaining 25% were testing subsets. The CARET package in R was used to filter variables and build random forest. The prediction ability of established model was evaluated by specificity, sensitivity, accuracy, relative operating characteristic curve (ROC curve) in testing subsets. In addition, the performance of random forest was compared with other 3 commonly used machine learning algorithms (Artificial Neural Network, Naive Bayes, and Support Vector Machine).Results:In this study, 30 variables including the demographic information, risk factors of cardiovascular disease, vital signs at admission, laboratory tests were identified and used to establish our random forest prediction model. The area under the curve of the testing subsets ROC was 0.893. The specificity and sensitivity of prediction model was 0.791 and 0.866, respectively. And the first creatinine, first blood urea nitrogen, and D-dimer after admission, age, mechanical ventilation were the top-five factors in this model. After comparing various machine learning algorithms, random forest model had a better performance.Conclusion:The random forest model would be used to predict the occurrence of AMI with AKI.

Objective To discuss the clinical application of mechanical thrombectomy with AngioJet system for acute lower limb arterial ischemia (ALI).Methods A total of 12 ALI patients,who underwent percutaneous mechanical thrombectomy with AngioJet systemn during the period from January 2015 to November 2016,were enrolled in this study.The clinical data were retrospectively analyzed.The blood flow classification score after thrombolysis in myocardial infarction (TIMI) was used to evaluate the blood perfusion condition,and Cooley standard of efficacy score was used to assess the clinical curative effect.Results The technical success rate of mechanical thrombectomy with AngioJet system was 91.7％ (11/12).The average restored perfusion time was (1.5±0.6) hours.The clinical success rate and limb salvage rate were 83.3％ (10/ 12) and 91.7％ (11/12),respectively.The TIMI flow scores were improved from preoperative grade 0 (n=8) and Ⅰ (n=4) to postoperative grade 0 (n=1),Ⅰ (n=3) and Ⅱ (n=8).In 11 patients (91.7％) the symptoms of lower limb arterial ischemia were strikingly improved after mechanical thrombectomy.In one patient,the postoperative TIMI flow score remained 0 as preoperative state and the symptoms of lower limb arterial ischemia were not improved although catheter directed thrombolysis therapy was employed for 24 hours,and above-knee surgical amputation had to be carried out.Cooley efficacy score showed that complete cure was seen in 4 patients (33.3％),good response in 6 patients (50.0％),general improvement in one patient (8.3％) and pool response in one patient (8.3％).No severe bleeding complications occurred.Conclusion Percutaneous mechanical thrombectomy with AngioJet can rapidly recover the blood perfusion in patients with ALI,thus,further deterioration of the disease can be prevented and the limb salvage rate can be improved.Therefore,this technique has good clinical application value.