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https://www.readbyqxmd.com/read/28645964/the-predictive-value-of-serial-changes-in-diaphragm-function-during-the-spontaneous-breathing-trial-for-weaning-outcome-a-study-protocol
#1
Pengmin Zhou, Zhongheng Zhang, Yucai Hong, Huabo Cai, Hui Zhao, Peifeng Xu, Yiming Zhao, Shengping Lin, Xuchang Qin, JiaWei Guo, Yun Pan, Junru Dai
INTRODUCTION: There is a variety of tools being used in clinical practice for the prediction of weaning success from mechanical ventilation. However, their diagnostic performances are less than satisfactory. The purpose of this study is to investigate the value of serial changes in diaphragm function measured by ultrasound during the spontaneous breathing trial (SBT) as a weaning predictor. METHODS AND ANALYSIS: This is a prospective observational study conducted in a 10-bed medical emergency intensive care unit (EICU) in a university-affiliated hospital...
June 23, 2017: BMJ Open
https://www.readbyqxmd.com/read/28635185/antipulverization-electrode-based-on-low-carbon-triple-shelled-superstructures-for-lithium-ion-batteries
#2
Lianhai Zu, Qingmei Su, Feng Zhu, Bingjie Chen, Huanhuan Lu, Chengxin Peng, Ting He, Gaohui Du, Pengfei He, Kai Chen, Shihe Yang, Jinhu Yang, Huisheng Peng
The realization of antipulverization electrode structures, especially using low-carbon-content anode materials, is crucial for developing high-energy and long-life lithium-ion batteries (LIBs); however, this technology remains challenging. This study shows that SnO2 triple-shelled hollow superstructures (TSHSs) with a low carbon content (4.83%) constructed by layer-by-layer assembly of various nanostructure units can withstand a huge volume expansion of ≈231.8% and deliver a high reversible capacity of 1099 mAh g(-1) even after 1450 cycles...
June 21, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28633111/drought-avoiding-plants-with-low-water-use-can-achieve-high-rainfall-retention-without-jeopardising-survival-on-green-roofs
#3
Christopher Szota, Claire Farrell, Nicholas S G Williams, Stefan K Arndt, Tim D Fletcher
Green roofs are increasingly being used among the suite of tools designed to reduce the volume of surface water runoff generated by cities. Plants provide the primary mechanism for restoring the rainfall retention capacity of green roofs, but selecting plants with high water use is likely to increase drought stress. Using empirically-derived plant physiological parameters, we used a water balance model to assess the trade-off between rainfall retention and plant drought stress under a 30-year climate scenario...
June 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28613341/three-dimensional-interpenetrating-mesoporous-carbon-confining-sno2-particles-for-superior-sodiation-desodiation-properties
#4
Jagabandhu Patra, Purna Chandra Rath, Cheng-Hsein Yang, Diganta Saikia, Hsien-Ming Kao, Jeng-Kuei Chang
Nanosized SnO2 particles (∼2 nm in diameter) are embedded in ordered mesoporous CMK-8 carbon with unique three-dimensional interconnected pore channels and used as a sodium-ion battery (NIB) anode. Due to the CMK-8 confinement effects, the growth of SnO2 is suppressed during synthesis, leading to high material electroactivity. The CMK-8 not only serves as an electronic conducting pathway, but also creates interpenetrating tunnels, which guarantee electrolyte accessibility and thus Na(+) transport throughout the electrode...
June 14, 2017: Nanoscale
https://www.readbyqxmd.com/read/28582266/a-beam-monitoring-and-validation-system-for-continuous-line-scanning-in-proton-therapy
#5
Grischa Klimpki, Serena Psoroulas, Christian Bula, Urs Rechsteiner, Michael Eichin, Damien Weber, Antony Lomax, David Meer
Line scanning represents a faster and potentially more flexible form of pencil beam scanning than conventional <i>step-and-shoot</i> irradiations. It seeks to minimize dead times in beam delivery whilst preserving the possibility to modulate the dose at any point in the target volume. Our second generation proton gantry features irradiations in line scanning mode, but it still lacks a dedicated monitoring and validation system that guarantees patient safety throughout beam delivery. We report on its design and implementation in this paper...
June 5, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28580809/cardiovascular-imaging-environment-will-the-future-be-cloud-based
#6
Nadine Kawel-Boehm, David A Bluemke
In cardiovascular CT and MR imaging large datasets have to be stored, post-processed, analyzed and distributed. Beside basic assessment of volume and function in cardiac magnetic resonance imaging e.g., more sophisticated quantitative analysis is requested requiring specific software. Several institutions cannot afford various types of software and provide expertise to perform sophisticated analysis. Areas covered: Various cloud services exist related to data storage and analysis specifically for cardiovascular CT and MR imaging...
June 13, 2017: Expert Review of Medical Devices
https://www.readbyqxmd.com/read/28560225/minimum-volume-standards-in-surgery-are-we-there-yet
#7
REVIEW
Hartwig Bauer, Kim C Honselmann
The quality of surgery is directly dependent on the quantity, more specifically, on the number of operations performed at a given hospital as well as on the designated surgeon. This fact is supported by numerous studies and meta-analyses that will be presented in the following text. Most of the convincing data for complex procedures can be obtained from visceral (upper and lower gastrointestinal) surgery studies. Mortality of large oncological procedures, such as esophageal or pancreatic surgery, can be reduced by 50% if a certain number of interventions are guaranteed per year...
May 2017: Visceral Medicine
https://www.readbyqxmd.com/read/28555505/comparison-of-dose-distribution-for-head-and-neck-cancer-patients-with-and-without-dose-painting-escalation-during-radiotherapy-realized-with-tomotherapy-unit
#8
Malgorzata Skorska, Tomasz Piotrowski, Adam Ryczkowski
OBJECTIVE: To determine and quantify the percentage dose increase to organs at risk (OARs) with multiple-level dose painting (DP) for patients with head and neck cancer in comparison with standard regimen. METHODS: 12 patients who had undergone fluorine-18 fludeoxyglucose ((18)F-FDG) positron emission tomography (PET)/CT scan were retrospectively enrolled. Two treatment plans-one using DP escalation and one without-were optimized for each patient base on PET/CT data...
June 23, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28532617/first-french-experiences-of-total-body-irradiations-using-helical-tomotherapy-%C3%A2
#9
R Sun, X Cuenca, R Itti, S Nguyen Quoc, J-P Vernant, J-J Mazeron, C Jenny, M Chea
PURPOSE: Dynamic conformal radiotherapy with helical TomoTherapy(®) (HT) offers a more quantitative paradigm for total body irradiation. Treatment planning, delivery, dose verification of the first French experiences of total body irradiation using helical TomoTherapy(®) are presented. MATERIALS AND METHODS: Patients planned for total body irradiation at our institution from February 2012 to May 2013 were reported. Total body irradiation consisted in a single fraction of 2Gy...
May 19, 2017: Cancer Radiothérapie: Journal de la Société Française de Radiothérapie Oncologique
https://www.readbyqxmd.com/read/28528253/pressure-induced-transformations-in-sorbic-acid
#10
G D Saraiva, J R Maia, J A Lima, C E S Nogueira, P T C Freire, F F de Sousa, A M R Teixeira, J Mendes Filho
This research reports a pressure dependent Raman study of the sorbic acid between 0.0 and 10.0GPa. The unpolarized Raman spectra were measured in the spectral range of 20-3000cm(-1). The high-pressure Raman scattering study of the sorbic acid showed that it underwent a gradual, disordering process. At the room temperature and at the ambient pressure conditions, the crystal structure of the sorbic acid belongs to the monoclinic system with a C2/c (C2h(6)) space group. The pressure increase induced a higher disorder in the monoclinic unit cell, since a single bending mode, and only very broad stretching Raman modes are present at pressure of ~10GPa...
May 10, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28506136/predictors-to-intravenous-fluid-responsiveness
#11
Jorge Iván Alvarado Sánchez, William Fernando Amaya Zúñiga, Manuel Ignacio Monge García
Management with intravenous fluids can improve cardiac output in some surgical patients. Management with static preload indicators, such as central venous pressure and pulmonary artery occlusion pressure, has not demonstrated a suitable relationship with changes in the cardiac output induced by intravenous fluid therapy. Dynamic indicators, such as the variability of arterial pulse pressure or stroke volume variation, have demonstrated a suitable relationship. Since improvement in cardiac output does not guarantee an adequate perfusion pressure, in patients with hypotension, it is also necessary to know whether arterial pressure will also increase with intravenous fluid therapy...
January 1, 2017: Journal of Intensive Care Medicine
https://www.readbyqxmd.com/read/28472627/neuroimaging-markers-associated-with-maintenance-of-optimal-memory-performance-in-late-life
#12
Maria Dekhtyar, Kathryn V Papp, Rachel Buckley, Heidi I L Jacobs, Aaron P Schultz, Keith A Johnson, Reisa A Sperling, Dorene M Rentz
BACKGROUND: Age-related memory decline has been well-documented; however, some individuals reach their 8th-10th decade while maintaining strong memory performance. OBJECTIVE: To determine which demographic and biomarker factors differentiated top memory performers (aged 75+, top 20% for memory) from their peers and whether top memory performance was maintained over 3 years. METHODS: Clinically normal adults (n=125, CDR=0; age: 79.5±3.57 years) from the Harvard Aging Brain Study underwent cognitive testing and neuroimaging (amyloid PET, MRI) at baseline and 3-year follow-up...
June 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28468363/modelling-and-calibration-of-depth-dependent-distortion-for-large-depth-visual-measurement-cameras
#13
Peng Sun, Naiguang Lu, Mingli Dong
Lens distortion parameters vary with the distance between the object point and the image plane. We propose an analytical model of depth-dependent distortion for large depth-of-field digital cameras used for high accuracy photogrammetry. Compared with the magnification-dependent model, the proposed one does not need focusing operation during calibration, thus eliminates focusing errors and guarantees the stability of camera interior parameters. Compared with the widely used constant distortion parameter model, the proposed model reduces the maximum distortion variation from 8...
May 1, 2017: Optics Express
https://www.readbyqxmd.com/read/28451499/iatrogenic-spinal-cord-injury-resulting-from-cervical-spine-surgery
#14
Alan H Daniels, Robert A Hart, Alan S Hilibrand, David E Fish, Jeffrey C Wang, Elizabeth L Lord, Zorica Buser, P Justin Tortolani, D Alex Stroh, Ahmad Nassr, Bradford L Currier, Arjun S Sebastian, Paul M Arnold, Michael G Fehlings, Thomas E Mroz, K Daniel Riew
STUDY DESIGN: Retrospective cohort study of prospectively collected data. OBJECTIVE: To examine the incidence of iatrogenic spinal cord injury following elective cervical spine surgery. METHODS: A retrospective multicenter case series study involving 21 high-volume surgical centers from the AOSpine North America Clinical Research Network was conducted. Medical records for 17 625 patients who received cervical spine surgery (levels from C2 to C7) between January 1, 2005, and December 31, 2011, were reviewed to identify occurrence of iatrogenic spinal cord injury...
April 2017: Global Spine Journal
https://www.readbyqxmd.com/read/28437777/testing-decontaminated-sediments-as-a-substrate-for-ornamentals-in-field-nursery-plantations
#15
Francesca Ugolini, Costanza Calzolari, Giuseppe Mario Lanini, Luciano Massetti, Stefania Pollaki, Antonio Raschi, Francesco Sabatini, Giacomo Tagliaferri, Fabrizio Ungaro, Daniele Massa, Maurizio Antonetti, Carlos Garcia Izquierdo, Cristina Macci, Grazia Masciandaro
When canals and harbours are dredged, huge amount of polluted sediments has to be stocked and transported to the landfill with incredibly high costs of management. Among the remediation techniques for the reclamation of polluted sediments and soils, phytoremediation represents a sustainable and effective technique though still not fully promoted or commercialized. In this study we have tested the suitability for plant nursing of a substrate resulting from sediments dredged from a canal and treated with phytoremediation...
April 21, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28427915/-multimorbidity-in-general-practice-and-the-ariadne-principles-a-person-centred-approach
#16
Alexandra Prados-Torres, Isabel Del Cura-González, Juan Daniel Prados-Torres, Francisca Leiva-Fernández, Juan Antonio López-Rodríguez, Amaia Calderón-Larrañaga, Christiane Muth
Multimorbidity, defined as the coexistence of two or more chronic conditions in one same individual, has negative consequences for people suffering from it and it poses a real challenge for health systems. In primary care, where most of these patients are attended, the clinical management of multimorbidity can be a complex task due, among others, to the high volume of clinical information that needs to be handled, the scarce scientific evidence available to approach multimorbidity, and the need for coordination among multiple health providers to guarantee continuity of care...
April 17, 2017: Atencion Primaria
https://www.readbyqxmd.com/read/28416951/spirometry-and-bronchodilator-test
#17
REVIEW
Yun Su Sim, Ji-Hyun Lee, Won-Yeon Lee, Dong In Suh, Yeon-Mok Oh, Jong-Seo Yoon, Jin Hwa Lee, Jae Hwa Cho, Cheol Seok Kwon, Jung Hyun Chang
Spirometry is a physiological test for assessing the functional aspect of the lungs using an objective indicator to measure the maximum amount of air that a patient can inhale and exhale. Acceptable spirometry testing needs to be conducted three times by an acceptable and reproducible method for determining forced vital capacity (FVC). Until the results of three tests meet the criteria of reproducibility, the test should be repeated up to eight times. Interpretation of spirometry should be clear, concise, and informative...
April 2017: Tuberculosis and Respiratory Diseases
https://www.readbyqxmd.com/read/28388117/rapid-sampling-of-stochastic-displacements-in-brownian-dynamics-simulations
#18
Andrew M Fiore, Florencio Balboa Usabiaga, Aleksandar Donev, James W Swan
We present a new method for sampling stochastic displacements in Brownian Dynamics (BD) simulations of colloidal scale particles. The method relies on a new formulation for Ewald summation of the Rotne-Prager-Yamakawa (RPY) tensor, which guarantees that the real-space and wave-space contributions to the tensor are independently symmetric and positive-definite for all possible particle configurations. Brownian displacements are drawn from a superposition of two independent samples: a wave-space (far-field or long-ranged) contribution, computed using techniques from fluctuating hydrodynamics and non-uniform fast Fourier transforms; and a real-space (near-field or short-ranged) correction, computed using a Krylov subspace method...
March 28, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28340895/post-operative-consequences-of-hemodynamic-optimization
#19
A Lazkani, G Lebuffe
Hemodynamic optimization begins with a medical assessment to identify the high-risk patients. This stratification is needed to customize the choice of hemodynamic support that is best adapted to the patient's level of risk, integrating the use of the least invasive procedures. The macro-circulatory hemodynamic approach aims to maintain a balance between oxygen supply (DO2) and oxygen demand (VO2). Volume replacement plays a crucial role based on the titration of fluid boluses according to their effect on measured stroke volume or indices of preload dependency...
December 2016: Journal of Visceral Surgery
https://www.readbyqxmd.com/read/28339918/can-clinically-relevant-dose-errors-in-patient-anatomy-be-detected-by-gamma-passing-rate-or-modulation-complexity-score-in-volumetric-modulated-arc-therapy-for-intracranial-tumors
#20
Shingo Ohira, Yoshihiro Ueda, Masaru Isono, Akira Masaoka, Misaki Hashimoto, Masayoshi Miyazaki, Masaaki Takashina, Masahiko Koizumi, Teruki Teshima
We investigated whether methods conventionally used to evaluate patient-specific QA in volumetric-modulated arc therapy (VMAT) for intracranial tumors detect clinically relevant dosimetric errors. VMAT plans with coplanar arcs were designed for 37 intracranial tumors. Dosimetric accuracy was validated by using a 3D array detector. Dose deviations between the measured and planned doses were evaluated by gamma analysis. In addition, modulation complexity score for VMAT (MCSv) for each plan was calculated. Three-dimensional dose distributions in patient anatomy were reconstructed using 3DVH software, and clinical deviations in dosimetric parameters between the 3DVH doses and planned doses were calculated...
March 3, 2017: Journal of Radiation Research
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