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https://www.readbyqxmd.com/read/28343301/comparison-of-optical-see-through-head-mounted-displays-for-surgical-interventions-with-object-anchored-2d-display
#1
Long Qian, Alexander Barthel, Alex Johnson, Greg Osgood, Peter Kazanzides, Nassir Navab, Bernhard Fuerst
PURPOSE: Optical see-through head-mounted displays (OST-HMD) feature an unhindered and instantaneous view of the surgery site and can enable a mixed reality experience for surgeons during procedures. In this paper, we present a systematic approach to identify the criteria for evaluation of OST-HMD technologies for specific clinical scenarios, which benefit from using an object-anchored 2D-display visualizing medical information. METHODS: Criteria for evaluating the performance of OST-HMDs for visualization of medical information and its usage are identified and proposed...
March 25, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28343299/the-role-of-line-1-methylation-in-predicting-survival-among-colorectal-cancer-patients-a-meta-analysis
#2
Ding Ye, Danjie Jiang, Yingjun Li, Mingjuan Jin, Kun Chen
BACKGROUND: The prognostic value of long interspersed nucleotide element-1 (LINE-1) methylation in patients with colorectal cancer (CRC) remains uncertain. We have therefore performed a meta-analysis to elucidate this issue. METHODS: The PubMed and Web of Science databases were searched for studies published up to 30 June 2016 which reported on an association between LINE-1 methylation and overall survival (OS), disease-free survival (DFS), or cancer-specific survival (CSS) among CRC patients...
March 25, 2017: International Journal of Clinical Oncology
https://www.readbyqxmd.com/read/28343267/tumor-associated-macrophages-and-regulatory-t-cells-infiltration-and-the-clinical-outcome-in-colorectal-cancer
#3
Dariusz Waniczek, Zbigniew Lorenc, Mirosław Śnietura, Mariusz Wesecki, Agnieszka Kopec, Małgorzata Muc-Wierzgoń
The aim of the study is the assessment of the intensity of the infiltration of tumor-associated macrophages (TAMs) CD68(+)/iNOS(-) and Tregs CD8(+)/FoxP3(+) in colorectal cancer (CRC) patients as prognostic factors with respect to disease-free survival (DFS) and overall survival (OS). In this retrospective study, tissue samples were obtained from 89 patients undergoing resection for CRC (stage IIA, pT3N0M0 and stages IIIB and IIIC, pT3N1-2M0). Recurrence was observed in 45 patients at the time of the follow-up (10 local recurrences, 35 distant metastases)...
March 25, 2017: Archivum Immunologiae et Therapiae Experimentalis
https://www.readbyqxmd.com/read/28343258/variation-of-antibiotic-consumption-and-its-correlated-factors-in-turkey
#4
Ayfer Sahin, Ahmet Akici, Volkan Aydin, Bahar Melik, Mesil Aksoy, Ali Alkan
BACKGROUND: Presentation of antibiotic utilization data by reliable and comparable analyses constitutes an important way of ensuring rational use of antibiotics. This study aimed to evaluate antibiotic consumption (AC) of Turkey by each city/region and to investigate any association of such consumption with socio-economic factors. METHOD: For 81 provinces and 12 regions in Turkey, AC data from IMS (Intercontinental Medical Statistics) in 2011 was analyzed in accordance with "ATC/DDD, DID" (Anatomical Therapeutic Chemical/Defined Daily Doses, DID = DDD/1000 inhabitants/day) methodology supported by World Health Organization...
March 25, 2017: European Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28343177/gaps-in-obstetric-care-processes-we-can-only-improve-what-is-being-measured
#5
Charlotte Millde Luthander, Hans Järnbert Pettersson, Ulf Högberg, Sophie Berglund, Charlotta Grunewald
A multifaceted intervention at all six obstetric units in the Stockholm Health Region was performed in 2008-2011 in order to increase safety for the newborn infants. Case-controlled criterion-based reviews of care processes during labor and delivery have been used to assess factors associated with suboptimal care during labor and delivery. Categories of increased risk of adverse outcome during labor and delivery were defined. Cases with low Apgar scores and healthy controls were scrutinized and compared to data from a study with an identical design performed before the intervention...
March 27, 2017: Journal of Perinatal Medicine
https://www.readbyqxmd.com/read/28343164/a-quantitative-concordance-measure-for-comparing-and-combining-treatment-selection-markers
#6
Zhiwei Zhang, Shujie Ma, Lei Nie, Guoxing Soon
Motivated by an HIV example, we consider how to compare and combine treatment selection markers, which are essential to the notion of precision medicine. The current literature on precision medicine is focused on evaluating and optimizing treatment regimes, which can be obtained by dichotomizing treatment selection markers. In practice, treatment decisions are based not only on efficacy but also on safety, cost and individual preference, making it difficult to choose a single cutoff value for all patients in all settings...
March 25, 2017: International Journal of Biostatistics
https://www.readbyqxmd.com/read/28343129/nano-sized-molecularly-imprinted-polymer-for-selective-ultrasound-assisted-microextraction-of-pesticide-carbaryl-from-water-samples-spectrophotometric-determination
#7
A A Bazrafshan, M Ghaedi, Z Rafiee, S Hajati, A Ostovan
Ultrasound-assisted dispersive solid phase microextraction followed by UV-Vis spectrophotometry (UA-DSPME UV-Vis) was designed for the extraction and preconcentration of Carbaryl using nano-sized molecularly-imprinted polymer (MIP-NP). Nano-sized Carbaryl-imprinted polymer was characterized by scanning electron microscopy. A preliminary Plackett-Burman design was applied for screening. Subsequently, central composite design under response surface methodology was used to investigate and model the Carbaryl adsorption as response as well as to optimize this response versus variables such as Carbaryl MIP-NP mass, sonication time, temperature, eluent volume, pH and vortex time...
March 18, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28343124/effects-of-acute-alcohol-consumption-on-measures-of-simulated-driving-a-systematic-review-and-meta-analysis
#8
Christopher Irwin, Elizaveta Iudakhina, Ben Desbrow, Danielle McCartney
Driving simulators are used in a wide range of research settings to help develop an understanding of driver behavior in complex environments. Acute alcohol impairment is an important research topic for traffic safety and a large number of studies have indicated levels of simulated driving impairment imposed by alcohol across a range of performance outcome variables. The aim of the present study was to examine the impact of acute alcohol consumption on simulated driving performance by conducting a systematic review and meta-analysis of the available evidence...
March 23, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28343116/health-and-weight-gender-specific-linkages-under-heterogeneity-interdependence-and-resilience-factors
#9
Olaf Hübler
Many studies have shown that obesity is a serious health problem for our society. Empirical analyses often neglect a number of methodological issues and relevant influences on health. This paper investigates empirically whether neglecting these items leads to systematically different estimates. Based on data from the German Socio-Economic Panel, this study derives the following results. (1) Many combinations of weight and height lead to the same health status. (2) The relationship between health and body mass index is nonlinear...
March 11, 2017: Economics and Human Biology
https://www.readbyqxmd.com/read/28343078/development-and-validation-of-liquid-chromatography-tandem-mass-spectrometry-method-quantitative-determination-of-polymyxin-b1-polymyxin-b2-polymyxin-b3-and-isoleucine-polymyxin-b1-in-human-plasma-and-its-application-in-clinical-studies
#10
Kim H Hee, Yee K J Leaw, Jun L Ong, Lawrence S Lee
Polymyxin B (PB) is an antibiotic consisting of a cyclic heptapeptide and a tripeptide side chain used in treatment of infections caused by Gram-negative bacteria. Commercial formulations of PB contain multiple structurally related components with major constituents of PB1, PB2, PB3 and ile-PB1. To understand the pharmacokinetics of these major components, we have developed and validated a LC-MS/MS method to quantify PB1, PB2, PB3 and ile-PB1 in human plasma. PB was extracted from plasma by protein precipitation using trichloroacetic acid followed by chromatographic separation on Zorbax Bonus-RP column (100mm×2...
March 14, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28343041/characterization-of-regional-cold-hydrothermal-inflows-enriched-in-arsenic-and-associated-trace-elements-in-the-southern-part-of-the-duero-basin-spain-by-multivariate-statistical-analysis
#11
Elena Giménez-Forcada, Marisol Vega-Alegre, Susana Timón-Sánchez
Naturally occurring arsenic in groundwater exceeding the limit for potability has been reported along the southern edge of the Cenozoic Duero Basin (CDB) near its contact with the Spanish Central System (SCS). In this area, spatial variability of arsenic is high, peaking at 241μg/L. Forty-seven percent of samples collected contained arsenic above the maximum allowable concentration for drinking water (10μg/L). Correlations of As with other hydrochemical variables were investigated using multivariate statistical analysis (Hierarchical Cluster Analysis, HCA and Principal Component Analysis, PCA)...
March 23, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28343021/application-of-mixed-methods-design-in-community-engaged-research-lessons-learned-from-an-evidence-based-intervention-for-latinos-with-chronic-illness-and-minor-depression
#12
Claudia X Aguado Loi, Moya L Alfonso, Isabella Chan, Kelsey Anderson, Dinorah Dina Martinez Tyson, Junius Gonzales, Jaime Corvin
The purpose of this paper is to share lessons learned from a collaborative, community-informed mixed-methods approach to adapting an evidence-based intervention to meet the needs of Latinos with chronic disease and minor depression and their family members. Mixed-methods informed by community-based participatory research (CBPR) were employed to triangulate multiple stakeholders' perceptions of facilitators and barriers of implementing the adapted intervention in community settings. Community partners provided an insider perspective to overcome methodological challenges...
December 24, 2016: Evaluation and Program Planning
https://www.readbyqxmd.com/read/28343003/essential-design-considerations-for-the-resazurin-reduction-assay-to-noninvasively-quantify-cell-expansion-within-perfused-extracellular-matrix-scaffolds
#13
Joseph S Uzarski, Michael D DiVito, Jason A Wertheim, William M Miller
Precise measurement of cellularity within bioartificial tissues and extracellular matrix (ECM) scaffolds is necessary to augment rigorous characterization of cellular behavior, as accurate benchmarking of tissue function to cell number allows for comparison of data across experiments and between laboratories. Resazurin, a soluble dye that is reduced to highly fluorescent resorufin in proportion to the metabolic activity of a cell population, is a valuable, noninvasive tool to measure cell number. We investigated experimental conditions in which resazurin reduction is a reliable indicator of cellularity within three-dimensional (3D) ECM scaffolds...
February 16, 2017: Biomaterials
https://www.readbyqxmd.com/read/28342907/active-placebo-control-groups-of-pharmacological-interventions-were-rarely-used-but-merited-serious-consideration-a-methodological-overview
#14
Jakob Solgaard Jensen, Andreas Ørsted Bielefeldt, Asbjørn Hróbjartsson
OBJECTIVES: Active placebos are control interventions that mimic the side-effects of the experimental interventions in randomised trials and are sometimes used to reduce the risk of unblinding. We wanted to assess how often randomised clinical drug trials implement active placebo control groups; to provide a catalogue, and a characterisation, of such trials; and to analyse methodological arguments for and against use of active placebo. STUDY DESIGN: An overview consisting of three thematically linked sub-studies...
March 22, 2017: Journal of Clinical Epidemiology
https://www.readbyqxmd.com/read/28342886/using-genetic-data-to-improve-species-distribution-models
#15
Jérémy Bouyer, Renaud Lancelota
Tsetse flies (Diptera, Glossinidae) transmit human and animal trypanosomoses in Africa, respectively a neglected human disease (sleeping sickness) and the most important constraint to cattle production in infested countries (nagana). We recently developed a methodology to map landscape friction (i.e. resistance to movement) for tsetse in West Africa. The goal was to identify natural barriers to tsetse dispersal, and potentially isolated tsetse populations for targeting elimination programmes. Most species distribution models neglect landscape functional connectivity whereas environmental factors affecting suitability or abundance are not necessarily the same as those influencing gene flows...
March 22, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28342882/functional-neuroimaging-findings-in-healthy-middle-aged-adults-at-risk-of-alzheimer-s-disease
#16
REVIEW
Mirette Habib, Elijah Mak, Silvy Gabel, Li Su, Guy Williams, Adam Waldman, Katie Wells, Karen Ritchie, Craig Ritchie, John T O'Brien
It is well established that the neurodegenerative process of Alzheimer's disease (AD) begins many years before symptom onset. This preclinical phase provides a crucial time-window for therapeutic intervention, though this requires biomarkers that could evaluate the efficacy of future disease-modification treatments in asymptomatic individuals. The last decade has witnessed a proliferation of studies characterizing the temporal sequence of the earliest functional and structural brain imaging changes in AD. These efforts have focused on studying individuals who are highly vulnerable to develop AD, such as those with familial genetic mutations, susceptibility genes (i...
March 22, 2017: Ageing Research Reviews
https://www.readbyqxmd.com/read/28342847/na-k-atpase-interaction-with-methylglyoxal-as-reactive-metabolic-side-product
#17
Marika Svrckova, Martina Zatloukalova, Petra Dvorakova, Dominika Coufalova, David Novak, Lenka Hernychova, Jan Vacek
Proteins are subject to oxidative modification and the formation of adducts with a broad spectrum of reactive species via enzymatic and non-enzymatic mechanisms. Here we report that in vitro non-enzymatic methylglyoxal (MGO) binding causes the inhibition and formation of MGO advanced glycation end-products (MAGEs) in Na(+)/K(+)-ATPase (NKA). Concretely, MGO adducts with NKA amino acid residues (mainly Arg) and N(ε)-(carboxymethyl)lysine (CML) formation were found. MGO is not only an inhibitor for solubilized NKA (IC50 = 91±16 μM), but also for reconstituted NKA in the lipid bilayer environment, which was clearly demonstrated using a DPPC/DPPE liposome model in the presence or absence of the NKA-selective inhibitor ouabain...
March 22, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28342844/a-system-dynamics-modelling-approach-to-assess-the-impact-of-launching-a-new-nicotine-product-on-population-health-outcomes
#18
Andrew Hill, Oscar M Camacho
In 2012 the US FDA suggested the use of mathematical models to assess the impact of releasing new nicotine or tobacco products on population health outcomes. A model based on system dynamics methodology was developed to project the potential effects of a new nicotine product at a population level. A model representing traditional smoking populations (never, current and former smokers) and calibrated using historical data was extended to a two-product model by including electronic cigarettes use statuses. Smoking mechanisms, such as product initiation, switching, transition to dual use, and cessation, were represented as flows between smoking statuses (stocks) and the potential effect of smoking renormalisation through a feedback system...
March 22, 2017: Regulatory Toxicology and Pharmacology: RTP
https://www.readbyqxmd.com/read/28342778/-the-burden-of-fungal-infections-in-algeria
#19
REVIEW
M Chekiri-Talbi, D W Denning
In Algeria, superficial mycoses are very commonly diagnosed. Deep fungal infections are less often observed. Few data from Algeria are found in the literature. We report for the first time the main causes of these diseases in our country and provide burden estimates. We searched for existing data and estimated the incidence and prevalence of fungal diseases based on the population at risk and available epidemiological data. Demographic data were derived from the Service (Office) of the Statistics (ONES), World Health Organization (WHO), The Joint Nations Programme on HIV/AIDS (UNAIDS) and national published reports...
March 22, 2017: Journal de Mycologie Médicale
https://www.readbyqxmd.com/read/28342731/preferred-management-of-primary-deep-arm-vein-thrombosis
#20
REVIEW
F J Vazquez, P Paulin, D Poodts, E Gándara
OBJECTIVE: Given its rarity, the management of primary upper extremity deep vein thrombosis is controversial. Although anticoagulation alone is commonly advocated for its treatment, it is unclear if this will reduce the risk of developing post-thrombotic syndrome (PTS). The aim of this "Evidence Driven" Clinical Scenario is to evaluate whether more aggressive treatments (including catheter directed thrombolysis or surgery) might help reduce the risk of PTS or recurrent venous thromboembolism in patients with primary upper extremity deep vein thrombosis (DVT)...
March 22, 2017: European Journal of Vascular and Endovascular Surgery
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