Philips Digital Diagnost VS故障维修6例

目的:由此总结出的常见Philips DR机故障的解决方法,可以供从事维修工作的同志借鉴。方法:介绍Philips DR的组成,通过详细分析Philips Digital Diagnost VS DR机6例故障,进行逐步排查工作,并解决问题。结果:确保医院正常工作的进行。结论:大型医用设备定期保养工作要做好。     

Post-retrieval propranolol treatment does not modulate reconsolidation or extinction of ethanol-induced conditioned place preference

The reconsolidation hypothesis posits that established emotional memories, when reactivated, become labile and susceptible to disruption. Post-retrieval injection of propranolol (PRO), a nonspecific β-adrenergic receptor antagonist, impairs subsequent retention performance of a cocaine- and a morphine-induced conditioned place preference (CPP), implicating the noradrenergic system in the reconsolidation processes of drug-seeking behavior. An important question is whether post-retrieval PRO disrupts memory for the drug-cue associations, or instead interferes with extinction. In the present study, we evaluated the role of the β-adrenergic system on the reconsolidation and extinction of ethanol-induced CPP. Male DBA/2J mice were trained using a weak or a strong conditioning procedure, achieved by varying the ethanol conditioning dose (1 or 2 g/kg) and the number of ethanol trials (2 or 4). After acquisition of ethanol CPP, animals were given a single post-retrieval injection of PRO (0, 10 or 30 mg/kg) and tested for memory reconsolidation 24 h later. Also, after the first reconsolidation test, mice received 18 additional 15-min choice extinction tests in which PRO was injected immediately after every test. Contrary to the prediction of the reconsolidation hypothesis, a single PRO injection after the retrieval test did not modify subsequent memory retention. In addition, repeated post-retrieval administration of PRO did not interfere with extinction of CPP in mice. Overall, our data suggest that the β-adrenergic receptor does not modulate the associative processes underlying ethanol CPP.     

Integrating scientific data for drug discovery and development using the Life Sciences Grid

Background: There are many daunting challenges for companies who wish to bring novel drugs to market. The information complexity around potential drug targets has increased greatly with the introduction of microarrays, high-throughput screening and other technological advances over the past decade, but has not yet fundamentally increased our understanding of how to modify a disease with pharmaceuticals. Further, the bar has been raised in getting a successful drug to market as just being new is no longer enough: the drug must demonstrate improved performance compared with the ever increasing generic pharmacopeia to gain support from payers and government authorities. In addition, partly as a consequence of a climate of concern regarding the safety of drugs, regulatory authorities have approved fewer new molecular entities compared to historical norms over the past few years. Objective: To overcome these challenges, the pharmaceutical industry must fully embrace information technology to bring better understood compounds to market. An important first step in addressing an unmet medical need is in understanding the disease and identifying the physiological target(s) to be modulated by the drug. Deciding which targets to pursue for a given disease requires a multidisciplinary effort that integrates heterogeneous data from many sources, including genetic variations of populations, changes in gene expression and biochemical assays. Method: The Life Science Grid was developed to provide a flexible framework to integrate such diverse biological, chemical and disease information to help scientists make better-informed decisions. Results/conclusion: The Life Science Grid has been used to rapidly and effectively integrate scientific information in the pharmaceutical industry and has been placed in the open source community to foster collaboration in the life sciences community.     

网络环境下数字资源集成方法与共享技术的应用

随着网络技术发展和信息服务全球化,信息集成技术成为下一代Internet中的信息融合、信息处理、信息发布等的关键技术。本文综合国内相关研究文献,对信息集成方法及共享技术应用类型进行简述,进而对未来的研究主题进行展望。     

基于使用控制和上下文的动态网格访问控制模型研究

网格环境动态、多域和异构性的特点决定其需要灵活、易于扩展和精细的授权机制.近来在网格环境下的访问控制方面做了大量研究,现有的模型大多在相对静止的前提下,基于主体的标识、组和角色信息进行授权,缺乏具体的上下文信息和灵活的安全策略.本文提出了网络环境下基于使用控制和上下文的动态访问控制模型.在该模型中,授权组件使用主体和客体属性定义传统的静态授权;条件组件使用有关的动态上下文信息体现了对主体在具体环境中的动态权限控制.在该模型的基础上,本文实现了一个原型系统,以验证模型的效率和易于实现性.     

Lucentis联合黄斑区格栅样光凝治疗视网膜分支静脉阻塞黄斑水肿的临床观察

目的 观察玻璃体腔注射雷珠单抗(Lucentis)联合黄斑区格栅样光凝治疗视网膜分支静脉阻塞(BRVO)继发黄斑水肿的疗效.方法 随机将确诊BRVO引起黄斑水肿的25例(25只眼),分为玻璃体腔注射Lucentis+格栅样光凝组(联合组)和单纯格栅样光凝组(光凝组).比较两组治疗后4、12、24周的最佳矫正视力、黄斑中心视网膜厚度(CMT)值以及有无并发症发生情况.结果 联合组疗效明显,视网膜厚度降低明显,视力提高快,在4、12、24周观察CMT值分别为:456.53±75.26、326.43±57.48、298.25±65.58.视力及CMT值均与治疗前比较有显著性差异(P＜0.05).激光组治疗后4周视力提高不明显,与治疗前比较无显著性差异(P=0.653);治疗后12周和24周视力逐步提高,但与联合组比较无显著性差异(P=0.462,0.342).视网膜厚度降低,在4、12、24周观查CMT值分别为:(609.81±64.26) μm、(536.06±56.89) μm、(468.31 ±48.8) μm.结论 玻璃体腔注射雷珠单抗(Lucentis)联合黄斑区格栅样光凝治疗可有效促进BRVO继发黄斑水肿的吸收,提高患者视力.     

Structural Basis for Complementary and Alternative Medicine: Phytochemical Interaction with Non-Structural Protein 2 Protease—A Reverse Engineering Strategy

Objective: To understand the druggability of the bioactive compounds from traditional herbal formulations "Nilavembu Kudineer" and "Swasthya Raksha Amruta Peya" to heal chikungunya virus (CHIKV) infection. Methods: The efficiency of twenty novel chemical entities from "Nilavembu Kudineer" and "Swasthya Raksha Amruta Peya" to inhibit CHIKV infection in silico were evaluated. Ligands were prepared using Ligprep module of Schr?dinger. Active site was identified using SiteMap program. Grid box was generated using receptor grid generation wizard. Molecular docking was carried out using Grid Based Ligand Docking with Energetics (GLIDE) program. Results: Molecular docking studies showed that among twenty compounds, andrographoside, deoxyandrographoside, neoandrographolide, 14-deoxy-11-oxoandrographolide, butoxone and oleanolic acid showed GLIDE extra precision (XP) score of –9.10, –8.72, –8.25, –7.38, –7.28 and –7.01, respectively which were greater than or comparable with chloroquine (reference compound) XP score (–7.08) and were found to interact with the key residues GLU 1043, LYS 1045, GLY 1176, LEU 1203, HIS 1222 and LYS 1239 which were characteristic functional unit crucial for replication of CHIKV. Conclusion: The binding affinity and the binding mode of chemical entities taken from herbal formulations with non-structural protein 2 protease were understood and our study provided a novel strategy in the development and design of drugs for CHIKV infection.     

A grid for a precise analysis of daily activities

Assessment of daily living activities is essential in patients with Alzheimer's disease. Most current tools quantitatively assess overall ability but provide little qualitative information on individual difficulties. Only a few tools allow therapists to evaluate stereotyped activities and record different types of errors. We capitalised on the Kitchen Activity Assessment to design a widely applicable analysis grid that provides both qualitative and quantitative data on activity performance. A cooking activity was videotaped in 15 patients with dementia and assessed according to the different steps in the execution of the task. The evaluations obtained with our grid showed good correlations between raters, between versions of the grid and between sessions. Moreover, the degree of independence obtained with our analysis of the task correlated with the Kitchen Activity Assessment score and with a global score of cognitive functioning. We conclude that assessment of a daily living activity with this analysis grid is reproducible and relatively independent of the therapist, and thus provides quantitative and qualitative information useful for both evaluating and caring for demented patients.     

Implementation of a real‐time reference and calibration grid platform for improved screening – mapping in Pap test slides

Cervical cancer screening based on the Papanicolaou (Pap) test is a widely applied but not always efficient practice for detecting Human Papillomavirus (HPV) mediated lesions, partially due to a non‐systematic and inadequate screening process. Our aim was to introduce an inexpensive easy‐to‐use direct screening platform for improved detection of abnormal cells indicative of underlying cervical neoplasia as well as persisting HPV infection. By employing a novel, efficient technique of laser‐based micromachining, we achieved the fabrication of spatial grids on commercially available coverslips allowing visual segmentation of the slide for efficient screening. Abnormal and formerly diagnosed as negative for intraepithelial lesion or malignancy (NILM) Pap test slides (n = 200) were analyzed by conventional and grid‐based screening. Grid‐based microscopy led to a more reliable diagnosis compared to the conventional by identifying an increased number of abnormal cells (P = 0.001). It decreased borderline ASCUS, AGC diagnosis, increasing LSIL, HSIL and in situ AdenoCa detection rates closely related with biopsy (P = 0.015; kappa = 0.978). Concerning the set of NILM diagnoses in rapid re‐screening, the method upgraded six cases (n = 6) to LSIL (P = 0.001). The proposed technical solution offers a calibration and orientation visual aid during the on‐site screening process providing significant advantages compared to expensive digital imaging techniques.     

Clinical study using novel endoscopic system for measuring size of gastrointestinal lesion

AIM:To verify the performance of a lesion size measurement system through a clinical study.METHODS:Our proposed system,which consists of a conventional endoscope,an optical device,an optical probe,and a personal computer,generates a grid scale to measure the lesion size from an endoscopic image.The width of the grid scale is constantly adjusted according to the distance between the tip of the endoscope and lesion because the lesion size on an endoscopic image changes according to the distance.The shape of the grid scale was corrected to match the distortion of the endoscopic image.The distance was calculated using the amount of laser light reflected from the lesion through an optical probe inserted into the instrument channel of the endoscope.The endoscopist can thus measure the lesion size without contact by comparing the lesion with the size of the grid scale on the endoscopic image.(1)A basic test was performed to verify the relationship between the measurement error eM and the tilt angle of the endoscope;and(2)The sizes of three colon polyps were measured using our system during endoscopy.These sizes were immediately measured by scale after their removal.RESULTS:There was no error atα=0°.In addition,the values of eM(mean±SD)were 0.24±0.11 mm(α=10°),0.90±0.58 mm(α=20°)and 2.31±1.41mm(α=30°).According to these results,our system has been confirmed to measure accurately when the tilt angle is less than 20°.The measurement error was approximately 1 mm in the clinical study.Therefore,it was concluded that our proposed measurement system was also effective in clinical examinations.CONCLUSION:By combining simple optical equipment with a conventional endoscope,a quick and accurate system for measuring lesion size was established.