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https://www.readbyqxmd.com/read/28922518/accelerated-epithelialization-and-improved-wound-healing-metrics-in-porcine-full-thickness-wounds-transplanted-with-full-thickness-skin-micrografts
#1
Christina L Rettinger, John L Fletcher, Anders H Carlsson, Rodney K Chan
Split-thickness skin grafting (STSG) is the current gold standard for treatment of extensive burn and traumatic skin injuries. However, STSG is limited by donor-site morbidity and availability, and often leads to scarring and wound contracture. Furthermore, these thin grafts lack dermal elements such as nerves and adnexa which are important in recapitulating normal skin function. Methods of fractional skin replacement either as minced STSGs or microscopic skin tissue columns (MSTCs) have been proposed, though these techniques have not been fully-characterized and lack evidence of regenerated adnexal structures...
September 18, 2017: Wound Repair and Regeneration
https://www.readbyqxmd.com/read/28922360/comparison-of-background-eeg-activity-of-different-groups-of-patients-with-idiopathic-epilepsy-using-shannon-spectral-entropy-and-cluster-based-permutation-statistical-testing
#2
Jose Antonio Urigüen, Begoña García-Zapirain, Julio Artieda, Jorge Iriarte, Miguel Valencia
Idiopathic epilepsy is characterized by generalized seizures with no apparent cause. One of its main problems is the lack of biomarkers to monitor the evolution of patients. The only tools they can use are limited to inspecting the amount of seizures during previous periods of time and assessing the existence of interictal discharges. As a result, there is a need for improving the tools to assist the diagnosis and follow up of these patients. The goal of the present study is to compare and find a way to differentiate between two groups of patients suffering from idiopathic epilepsy, one group that could be followed-up by means of specific electroencephalographic (EEG) signatures (intercritical activity present), and another one that could not due to the absence of these markers...
2017: PloS One
https://www.readbyqxmd.com/read/28922231/use-of-regional-anesthesia-for-outpatient-surgery-within-the-united-states-a-prevalence-study-using-a-nationwide-database
#3
Rodney A Gabriel, Brian M Ilfeld
BACKGROUND: Regional anesthesia is of benefit for outpatient surgery given its demonstrated improvement in analgesia and decrease in complications, resulting in shorter average recovery room times and lower hospital readmission rates. Unfortunately, there are few epidemiological studies outlining the overall utilization of peripheral nerve blocks (PNBs) in this setting. Therefore, the primary objective of this study was to report the overall utilization of several types of PNBs among all candidate cases in the outpatient setting within the United States...
September 14, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28921902/mechanistic-parameters-of-electrocatalytic-water-oxidation-on-limn2o4-in-comparison-to-natural-photosynthesis
#4
Lennart Köhler, Majid Ebrahimizadeh Abrishami, Vladimir Roddatis, Janis Geppert, Marcel Risch
Targeted improvement of the low efficiency of water oxidation during the oxygen evolution reaction (OER) is severely hindered by insufficient knowledge of the electrocatalytic mechanism on heterogeneous surfaces. We chose LiMn2O4 as a model system for mechanistic investigations as it shares the cubane structure with the active site of photosystem II and the valence of Mn3.5+ with the dark-stable S1 state in the mechanism of natural photosynthesis. The investigated LiMn2O4 nanoparticles are electrochemically stable in NaOH electrolytes and show respectable activity in any of the main metrics...
September 18, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28921859/trophic-interaction-modifications-an-empirical-and-theoretical-framework
#5
J Christopher D Terry, Rebecca J Morris, Michael B Bonsall
Consumer-resource interactions are often influenced by other species in the community. At present these 'trophic interaction modifications' are rarely included in ecological models despite demonstrations that they can drive system dynamics. Here, we advocate and extend an approach that has the potential to unite and represent this key group of non-trophic interactions by emphasising the change to trophic interactions induced by modifying species. We highlight the opportunities this approach brings in comparison to frameworks that coerce trophic interaction modifications into pairwise relationships...
October 2017: Ecology Letters
https://www.readbyqxmd.com/read/28921782/estimate-your-dose-raddose-3d
#6
Charles S Bury, Jonathan C Brooks-Bartlett, Steven P Walsh, Elspeth F Garman
We present the current status of RADDOSE-3D, a software tool allowing the estimation of the dose absorbed in a macromolecular crystallography diffraction experiment. The code allows a temporal and spatial dose contour map to be calculated for a crystal of any geometry and size as it is rotated in an X-ray beam, and gives several summary dose values: among them diffraction weighted dose. This allows experimenters to plan data collections which will minimise radiation damage effects by spreading the absorbed dose more homogeneously, and thus to optimise the use of their crystals...
September 16, 2017: Protein Science: a Publication of the Protein Society
https://www.readbyqxmd.com/read/28921580/integrating-prior-information-into-microwave-tomography-part-1-impact-of-detail-on-image-quality
#7
Douglas Kurrant, Anastasia Baran, Joe LoVetri, Elise Fear
PURPOSE: The authors investigate the impact that incremental increases in the level of detail of patient-specific prior information have on image quality and the convergence behavior of an inversion algorithm in the context of near-field microwave breast imaging. A methodology is presented that uses image quality measures to characterize the ability of the algorithm to reconstruct both internal structures and lesions embedded in fibroglandular tissue. The approach permits key aspects that impact the quality of reconstruction of these structures to be identified and quantified...
September 17, 2017: Medical Physics
https://www.readbyqxmd.com/read/28921541/automatic-labeling-of-mr-brain-images-through-extensible-learning-and-atlas-forests
#8
Lijun Xu, Hong Liu, Enmin Song, Meng Yan, Renchao Jin, Chih-Cheng Hung
PURPOSE: Multi-atlas-based method is extensively used in MR brain images segmentation because of its simplicity and robustness. This method provides excellent accuracy while time-consuming and limited in terms of obtaining information about new atlases. In this study, an automatic labeling of MR brain images through extensible learning and atlas forest is presented to address these limitations. METHODS: We propose an extensible learning model which allows the multi-atlas-based framework capable of managing the datasets with numerous atlases or dynamic atlas datasets and simultaneously ensure the accuracy of automatic labeling...
September 18, 2017: Medical Physics
https://www.readbyqxmd.com/read/28921536/technical-note-a-simulation-study-on-the-feasibility-of-radiotherapy-dose-enhancement-with-calcium-tungstate-and-hafnium-oxide-nano-and-microparticles
#9
Nicholas J Sherck, You-Yeon Won
PURPOSE: To assess the radiotherapy dose enhancement (RDE) potential of calcium tungstate (CaWO4 ) and hafnium oxide (HfO2 ) nano- and microparticles (NPs). A Monte Carlo simulation study was conducted to gauge their respective RDE potentials relative to that of the broadly studied gold (Au) NP. The study was warranted due to the promising clinical and preclinical studies involving both CaWO4 and HfO2 NPs as RDE agents in the treatment of various types of cancers. The study provides a baseline RDE to which future experimental RDE trends can be compared to...
September 18, 2017: Medical Physics
https://www.readbyqxmd.com/read/28921446/can-a-novel-icu-data-display-positively-affect-patient-outcomes-and-save-lives
#10
Natalia Olchanski, Mikhail A Dziadzko, Ing C Tiong, Craig E Daniels, Steve G Peters, John C O'Horo, Michelle N Gong
The aim of this study was to quantify the impact of ProCCESs AWARE, Ambient Clinical Analytics, Rochester, MN, a novel acute care electronic medical record interface, on a range of care process and patient health outcome metrics in intensive care units (ICUs). ProCCESs AWARE is a novel acute care EMR interface that contains built-in tools for error prevention, practice surveillance, decision support and reporting. We compared outcomes before and after AWARE implementation using a prospective cohort and a historical control...
September 18, 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/28921128/precision-of-bone-density-and-micro-architectural-properties-at-the-distal-radius-and-tibia-in-children-an-hr-pqct-study
#11
C E Kawalilak, A T Bunyamin, K M Björkman, J D Johnston, S A Kontulainen
Precision errors need to be known when monitoring bone micro-architecture in children with HR-pQCT. Precision errors for trabecular bone micro-architecture ranged from 1 to 8% when using the standard evaluation at the radius and tibia. Precision errors for cortical bone micro-architecture ranged from 1 to 11% when using the advanced cortical evaluation. INTRODUCTION: Our objective was to define HR-pQCT precision errors (CV%RMS) and least significant changes (LSCs) at the distal radius and tibia in children using the standard evaluation and the advanced cortical evaluation...
September 18, 2017: Osteoporosis International
https://www.readbyqxmd.com/read/28920901/joint-graph-layouts-for-visualizing-collections-of-segmented-meshes
#12
Jing Ren, Jens Schneider, Maks Ovsjanikov, Peter Wonka
We present a novel and efficient approach for computing joint graph layouts and then use it to visualize collections of segmented meshes. Our joint graph layout algorithm takes as input the adjacency matrices for a set of graphs along with partial, possibly soft, correspondences between nodes of different graphs. We then use a two stage procedure, where in the first step, we extend spectral graph drawing to include a consistency term so that a collection of graphs can be handled jointly. Our second step extends metric multi-dimensional scaling with stress majorization to the joint layout setting, while using the output of the spectral approach as initialization...
September 12, 2017: IEEE Transactions on Visualization and Computer Graphics
https://www.readbyqxmd.com/read/28920896/analysis-and-optimization-of-loss-functions-for-multiclass-top-k-and-multilabel-classification
#13
Maksim Lapin, Matthias Hein, Bernt Schiele
Top-k error is currently a popular performance measure on large scale image classification benchmarks such as ImageNet and Places. Despite its wide acceptance, our understanding of this metric is limited as most of the previous research is focused on its special case, the top-1 error. In this work, we explore two directions that shed light on the top-k error. First, we provide an in-depth analysis of established and recently proposed single-label multiclass methods along with a detailed account of efficient optimization algorithms for them...
September 13, 2017: IEEE Transactions on Pattern Analysis and Machine Intelligence
https://www.readbyqxmd.com/read/28920815/preliminary-characterization-of-dilated-cardiomyopathy-in-a-captive-population-of-banded-mongooses-mungos-mungo
#14
Javier López, Joanna Dukes-McEwan, Gabby Drake, Julian Chantrey
Between 2006 and 2015, a high incidence of dilated cardiomyopathy (DCM) was diagnosed in a captive population of banded mongooses (Mungos mungo) at Chester Zoo, United Kingdom. The aim of this study was to characterize DCM in these mongooses in order to raise awareness of this condition and help inform management and clinical decisions. Prospective clinical assessments, including echocardiography, radiography, and cardiac biomarkers, were carried out in four mongooses remaining in the collection. Radiographs from 15 mature mongooses were reviewed and cardiac size and metrics assessed...
September 2017: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/28920011/perceived-racial-ethnic-discrimination-and-mental-health-a-review-and-future-directions-for-social-epidemiology
#15
Anissa I Vines, Julia B Ward, Evette Cordoba, Kristin Z Black
PURPOSE OF REVIEW: Recent literature on racial or ethnic discrimination and mental health was reviewed to assess the current science and identify key areas of emphasis for social epidemiology. Objectives of this review were to: 1) Determine whether there have been advancements in the measurement and analysis of perceived discrimination; 2) Identify the use of theories and/or frameworks in perceived discrimination and mental health research; and 3) Assess the extent to which stress buffers are being considered and evaluated in the existing literature...
June 2017: Current Epidemiology Reports
https://www.readbyqxmd.com/read/28919873/evaluation-of-the-gratitude-questionnaire-in-a-chinese-sample-of-adults-factorial-validity-criterion-related-validity-and-measurement-invariance-across-sex
#16
Feng Kong, Xuqun You, Jingjing Zhao
The Gratitude Questionnaire (GQ; McCullough et al., 2002) is one of the most widely used instruments to assess dispositional gratitude. The purpose of this study was to validate a Chinese version of the GQ by examining internal consistency, factor structure, convergent validity, and measurement invariance across sex. A total of 1151 Chinese adults were recruited to complete the GQ, Positive Affect and Negative Affect Scales, and Satisfaction with Life Scale. Confirmatory factor analysis indicated that the original unidimensional model fitted well, which is in accordance with the findings in Western populations...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28919850/the-detection-of-phase-amplitude-coupling-during-sensory-processing
#17
Robert A Seymour, Gina Rippon, Klaus Kessler
There is increasing interest in understanding how the phase and amplitude of distinct neural oscillations might interact to support dynamic communication within the brain. In particular, previous work has demonstrated a coupling between the phase of low frequency oscillations and the amplitude (or power) of high frequency oscillations during certain tasks, termed phase amplitude coupling (PAC). For instance, during visual processing in humans, PAC has been reliably observed between ongoing alpha (8-13 Hz) and gamma-band (>40 Hz) activity...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28919460/a-likelihood-based-approach-to-p-value-interpretation-provided-a-novel-plausible-and-clinically-useful-research-study-metric
#18
Nicholas G Adams, Gerard O'Reilly
OBJECTIVES: Interpretation of clinical research findings using the paradigm of null hypothesis significance testing has a number of limitations. These include arbitrary dichotomization of results, lack of incorporation of study power and prior probability, and the confusing use of conditional probability. This study aimed to describe a novel method of P-value interpretation that would address these limitations. STUDY SETTING AND DESIGN: Published clinical research was re-interpreted using the delta likelihood ratio...
September 14, 2017: Journal of Clinical Epidemiology
https://www.readbyqxmd.com/read/28919249/dosimetric-predictors-for-acute-esophagitis-during-radiation-therapy-for-lung-cancer-results-of-a-large-statewide-observational-study
#19
Peter Paximadis, Matthew Schipper, Martha Matuszak, Mary Feng, Shruti Jolly, Thomas Boike, Inga Grills, Larry Kestin, Benjamin Movsas, Kent Griffith, Gregory Gustafson, Jean Moran, Teamour Nurushev, Jeffrey Radawski, Lori Pierce, James Hayman
PURPOSE: The purpose of this study is to identify dosimetric variables that best predict for acute esophagitis in patients treated for locally advanced non-small cell lung cancer in a prospectively accrued statewide consortium. METHODS AND MATERIALS: Patients receiving definitive radiation therapy for stage II-III non-small cell lung cancer within the Michigan Radiation Oncology Quality Consortium were included in the analysis. Dose-volume histogram data were analyzed to determine absolute volumes (cc) receiving doses from 10 to 60 Gy (V10, V20, V30, V40, V50, and V60), as well as maximum dose to 2 cc (D2cc), mean dose (MD), and generalized equivalent uniform dose (gEUD)...
July 19, 2017: Practical Radiation Oncology
https://www.readbyqxmd.com/read/28919125/multi-institution-analysis-of-infection-control-practices-identifies-the-subset-associated-with-best-surgical-site-infection-performance-a-texas-alliance-for-surgical-quality-collaborative-project
#20
Catherine H Davis, Lillian S Kao, Jason B Fleming, Thomas A Aloia
BACKGROUND: In an effort to reduce surgical site infection (SSI) rates, a large number of infection control practices (ICPs), including operating room attire policies, have been recommended. However, few have proven benefits and many are costly, time-consuming, and detrimental to provider morale. The goal of this multi-institution study was to determine which ICPs are associated with lower postoperative SSI rates. STUDY DESIGN: Twenty American College of Surgeons NSQIP and Texas Alliance for Surgical Quality-affiliated hospitals completed this Quality Improvement Assessment Board-approved study...
August 16, 2017: Journal of the American College of Surgeons
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