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https://www.readbyqxmd.com/read/28338314/surface-layer-evolution-on-graphite-during-electrochemical-sodium-tetraglyme-co-intercalation
#1
Julia Maibach, Fabian Jeschull, Daniel Brandell, Kristina Edstrom, Mario Valvo
One obstacle in sodium ion batteries is the lack of suitable anode materials. As recently shown, the most common anode material of the state of the art lithium ion batteries, graphite, can be used for sodium ion storage as well, if ether-based electrolyte solvents are used. These solvents co-intercalate with the sodium ions leading to the highly reversible formation of ternary graphite intercalation compounds (t-GIC). In order for the solvent co-intercalation to work efficiently, it is expected that only a very thin surface layer forms during electrochemical cycling...
March 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28336026/viscoelastic-studies-effective-tools-for-trauma-and-surgical-resuscitation-efforts
#2
Dagoberto Salinas
Trauma-induced coagulopathy (TIC) is an abrupt disruption of all hemostatic components of coagulation resulting from severe tissue injury and hypoperfusion. The effective management of TIC has remained elusive to clinicians using traditional laboratory methods, challenging efforts to improve outcomes related to uncontrolled bleeding. Recent initiatives have aimed to reduce TIC-associated morbidity and mortality, further invoking trauma experts to explore innovative modalities in the field of viscoelastic studies, such as thromboelastography (TEG) and rotational thromboelastometry (ROTEM)...
April 2017: AORN Journal
https://www.readbyqxmd.com/read/28335228/fabricating-water-dispersible-superparamagnetic-iron-oxide-nanoparticles-for-biomedical-applications-through-ligand-exchange-and-direct-conjugation
#3
Tina Lam, Pramod K Avti, Philippe Pouliot, Foued Maafi, Jean-Claude Tardif, Éric Rhéaume, Frédéric Lesage, Ashok Kakkar
Stable superparamagnetic iron oxide nanoparticles (SPIONs), which can be easily dispersed in an aqueous medium and exhibit high magnetic relaxivities, are ideal candidates for biomedical applications including contrast agents for magnetic resonance imaging. We describe a versatile methodology to render water dispersibility to SPIONs using tetraethylene glycol (TEG)-based phosphonate ligands, which are easily introduced onto SPIONs by either a ligand exchange process of surface-anchored oleic-acid (OA) molecules or via direct conjugation...
May 26, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28332659/hydration-controlled-anisotropic-and-giant-permittivity-in-teg-functionalized-eumelanin
#4
Marianna Ambrico, Paolo F Ambrico, Teresa Ligonzo, Antonio Cardone, Maria Grazia Bridelli, Giuseppe Casamassima, Paola Manini, Marco d'Ischia
Although it has long been known that the peculiar electronic-ionic conductor behavior of eumelanin is critically dependent on hydration, the detailed mechanisms by which water-polymer interactions control and affect the conduction properties have remained largely obscure. In this paper, we report a remarkable anisotropy and giant polarization effect in a synthetic eumelanin (TEGMe) chemically functionalized with hydrophilic TEG residues. FT-IR analyses of water sorption isotherms and AC measurements were consistent with a microporous structure binding or hosting mainly isolated water molecules...
March 23, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28320981/relationship-between-thromboelastography-and-long-term-ischemic-events-as-gauged-by-the-response-to-clopidogrel-in-patients-undergoing-elective-percutaneous-coronary-intervention
#5
Xumin Hou, Wenzheng Han, Qian Gan, Yuan Liu, Weiyi Fang
Ischemic events after percutaneous coronary intervention (PCI) remain a major concern for patients with coronary heart disease (CHD). The aim of the current study was to investigate whether thromboelastography (TEG) was a satisfactory technique to measure platelet function in vitro in order to improve risk stratification and the individual response to antiplatelet therapy. The diagnostic and prognostic utility of the maximum amplitude of adenosine diphosphate induced platelet-fibrin clots (MAADP) was measured with TEG in 759 patients undergoing elective PCI...
March 19, 2017: Bioscience Trends
https://www.readbyqxmd.com/read/28315812/onset-of-coagulation-function-recovery-is-delayed-in-severely-injured-trauma-patients-with-venous-thromboembolism
#6
Belinda H McCully, Christopher R Connelly, Kelly A Fair, John B Holcomb, Erin E Fox, Charles E Wade, Eileen M Bulger, Martin A Schreiber
BACKGROUND: Altered coagulation function after trauma may contribute to venous thromboembolism (VTE) development. Severe trauma impairs coagulation function, but the trajectory for recovery is not known. We hypothesized that enhanced, early recovery of coagulation function increases VTE risk in severely-injured trauma patients. STUDY DESIGN: Secondary analysis was performed on data from The Pragmatic Randomized Optimal Platelet and Plasma Ratio (PROPPR) trial, excluding patients who died within 24 hours and/or were on pre-injury anticoagulants...
March 15, 2017: Journal of the American College of Surgeons
https://www.readbyqxmd.com/read/28302286/viscoelastic-hemostatic-assays-in-the-management-of-the-pediatric-trauma-patient
#7
Christine M Leeper, Barbara A Gaines
Viscoelastic hemostatic assays (VHA), such as TEG and ROTEM, are whole blood tests that depict functional coagulation both numerically and graphically. The development of rapid VHA technology, which allows for the first data points to result within minutes of test initiation, has increased the utility of these tests in the treatment of trauma patients. Both adult and pediatric centers have integrated VHAs into trauma resuscitation and transfusion protocols. Literature regarding the use of VHAs for injured children is limited...
February 2017: Seminars in Pediatric Surgery
https://www.readbyqxmd.com/read/28299993/a-new-perspective-on-the-risk-of-hypercoagulopathy-in-ovarian-hyperstimulation-syndrome-using-thromboelastography
#8
Eyal Zohav, Benny Almog, Aviad Cohen, Ishai Levin, Varda Deutsch, Ariel Many, Ami Amit, Yoni Cohen
Thromboelastography (TEG) provides real-time assessment of hemostasis by measuring the viscoelastic properties, coagulation factor, and platelet activity in whole blood samples. In this prospective case-control study, we wanted to investigate whether blood clot formation assessment, using TEG, can identify a hypercoagulable state in women with severe ovarian hyperstimulation syndrome (OHSS). Thirty-six women who were hospitalized with severe OHSS were allocated to the OHSS group and 32 women undergoing controlled ovarian hyperstimulation but who did not develop OHSS were allocated to the control group...
January 1, 2017: Reproductive Sciences
https://www.readbyqxmd.com/read/28298662/the-teg-%C3%A2-6s-on-shaky-ground-a-novel-assessment-of-the-teg-%C3%A2-6s-performance-under-a-challenging-condition
#9
Martin Gill
Thromboelastography(®) (TEG(®)) is used to guide clinical decision-making across many medical and surgical subspecialties. Advances in this field have resulted in analyzers becoming increasingly user friendly, and have led to a reduction in the possibility of user error. The new TEG(®)6s does not come with the warnings of vibration and movement avoidance of its predecessor. It was decided to test the capability of this device while being subject to motion. TEG(®)6s machine 1 was placed in an environment free from motion...
March 2017: Journal of Extra-corporeal Technology
https://www.readbyqxmd.com/read/28297776/-value-of-thromboelastography-in-evaluating-coagulation-function-and-prognosis-in-patients-with-acute-on-chronic-liver-failure
#10
Y L Zeng, F Gao, J F Wei, H R Hou, X Jin, G G Ding, H Yin, J Shang, Y Kang
Objective: To investigate the coagulation function in patients with acute-on-chronic liver failure (ACLF) patients using thromboelastography (TEG), and to comprehensively and dynamically evaluate patients' bleeding and coagulation status. Methods: The clinical data of ACLF patients were collected, and TEG was used to evaluate whole blood clotting kinetics in these patients. Routine biochemical parameters were measured, and complications were evaluated. The t-test was used for comparison of continuous data, the chi-square test was used for comparison of categorical data, and the Pearson correlation coefficient was used for correlation analysis...
January 20, 2017: Zhonghua Gan Zang Bing za Zhi, Zhonghua Ganzangbing Zazhi, Chinese Journal of Hepatology
https://www.readbyqxmd.com/read/28280103/association-of-genetic-variant-and-platelet-function-in-patients-undergoing-neuroendovascular-stenting
#11
Xin-Gang Li, Ning Ma, Shu-Sen Sun, Zhe Xu, Wei Li, Yong-Jun Wang, Xin Yang, Zhong-Rong Miao, Zhi-Gang Zhao
INTRODUCTION: The risk of recurrent ischaemic events is related to platelet function, which is often assessed by thromboelastography (TEG). TEG has high interindividual variability. OBJECTIVE: To identify causal variants associated with TEG parameters in patients who receive aspirin and clopidogrel after intra- or extracranial stenting. METHODS: Patients who underwent stenting for extracranial or intracranial stenosis (70-99%) were recruited into the study...
March 9, 2017: Postgraduate Medical Journal
https://www.readbyqxmd.com/read/28277062/platelet-function-testing-in-cardiac-surgery-a-comparative-study-of-electrical-impedance-aggregometry-and-thromboelastography
#12
Bilal H Kirmani, Robert Ian Johnson, Seema Agarwal
Point of care platelet function tests are increasingly used to assess drug-related platelet inhibition prior to cardiac surgery. Numerous devices are available including Thromboelastography (TEG(®) PlateletMapping™). The latest generation TEG(®) - the TEG(®) 6 - has recently been released incorporating a cartridge-based system with a PlateletMapping cartridge. In this study, the performance of the TEG(®) 6 PlateletMapping was compared to that of Multiple Electrode Aggregometry (MEA) performed with the Multiplate™...
February 21, 2017: Platelets
https://www.readbyqxmd.com/read/28277060/thrombelastographic-hypercoagulability-and-antiplatelet-therapy-after-coronary-artery-bypass-surgery-teg-cabg-trial-a-randomized-controlled-trial
#13
Sulman Rafiq, Pär I Johansson, Klaus F Kofoed, Jens T Lund, Peter S Olsen, Simon Bentsen, Daniel A Steinbrüchel
A hypercoagulable state has, in observational studies, been associated with increased risk of thromboembolic events. The aim of this trial was to study whether dual antiplatelet therapy (DAPT) with clopidogrel in addition to aspirin could reduce the rate of graft occlusions, thromboembolic events, and death compared to aspirin monotherapy in hypercoagulable patients undergoing coronary artery bypass surgery. A total of 1683 patients were screened for eligibility, among which 165 patients were randomized and 133 patients underwent multislice computed tomography scan to evaluate their grafts...
February 22, 2017: Platelets
https://www.readbyqxmd.com/read/28272567/-thromboelastography-useful-in-cases-of-bleeding
#14
Aurora Espinosa, Marit Seim Ekeland
Blood products are a limited resource. A number of studies have shown that the use of thromboelastography (TEG) may reduce the need for blood transfusions. The analysis can be used in acute situations in patients with massive haemorrhage as a guide to transfusion therapy. Use of TEG may play an important role in targeting transfusion therapy.
March 2017: Tidsskrift for Den Norske Lægeforening: Tidsskrift for Praktisk Medicin, Ny Række
https://www.readbyqxmd.com/read/28271672/evaluation-of-the-lyophilized-platelets-function-by-thromboelastography-in-an-in-vitro-platelet-transfusion-model
#15
Xiaojun Deng, Xinguang Wu, Gaoshun Ge, Lihong Huang, Ning Li, Dan Wang
BACKGROUND: At present, liquid conserved platelets (PLTs) can only be stored at 22°C for up to 5 days. Waste of outdated PLTs and short supply of fresh PLTs were both seen in blood banks. Lyophilized PLTs were considered as one of the candidate replacements for liquid conserved PLTs. It is important to evaluate the function before it can be used in clinical trial. METHODS: In this study, an in vitro platelet transfusion model was established to evaluate the function of rehydrated lyophilized platelets (RLPs) by thromboelastography (TEG)...
March 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28271065/the-reliability-of-the-tracheoesophageal-groove-and-the-ligament-of-berry-as-landmarks-for-identifying-the-recurrent-laryngeal-nerve-a-cadaveric-study-and-meta-analysis
#16
REVIEW
Brandon Michael Henry, Beatrice Sanna, Matthew J Graves, Silvia Sanna, Jens Vikse, Iwona M Tomaszewska, R Shane Tubbs, Krzysztof A Tomaszewski
Purpose. The aim of this meta-analysis was to provide a comprehensive evidence-based assessment, supplemented by cadaveric dissections, of the value of using the Ligament of Berry and Tracheoesophageal Groove as anatomical landmarks for identifying the Recurrent Laryngeal Nerve. Methods. Seven major databases were searched to identify studies for inclusion. Eligibility was judged by two reviewers. Suitable studies were identified and extracted. MetaXL was used for analysis. All pooled prevalence rates were calculated using a random effects model...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28260316/-impact-of-cyp2c19-genotypes-on-antiplatelet-therapy-among-chinese-patients-with-acute-myocardial-infarction-after-percutaneous-coronary-intervention
#17
J J Xu, X F Tang, Y Song, N Xu, Y Yao, Y Wu, J Zhang, Z Gao, J Chen, R L Gao, Y J Yang, J Q Yuan
Objective: To investigate the impact of CYP2C19 genetic variants on antiplatelet therapy in Chinese patients with acute myocardial infarction(AMI) after primary percutaneous coronary intervention(PCI), and compare the antiplatelet effect between clopidogrel and ticagrelor with various CYP2C19 genotypes. Methods: From June 2014 to May 2015, 347 patients with AMI who underwent PCI treatment at Fuwai Hospital were enrolled in this single center prospective study, 221 cases were in clopidogrel group and 126 patients were in ticagrelor group...
February 24, 2017: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/28248803/1-1-transfusion-strategies-are-right-for-the-wrong-reasons
#18
Stephanie A Savage, Ben L Zarzaur, Brian L Brewer, Garrett H Lim, Ali C Martin, Louis J Magnotti, Martin A Croce, Timothy H Pohlman
INTRODUCTION: Early assessment of clot function identifies coagulopathies following injury. Abnormalities include a hypercoagulable state from excess thrombin generation, as well as an acquired coagulopathy. Efforts to address coagulopathy have resulted in earlier, aggressive use of plasma emphasizing 1:1 resuscitation. The purpose of this study was to describe coagulopathies in varying hemorrhagic profiles from a cohort of injured patients. METHODS: All injured patients who received at least one unit of packed red blood cells (PRBC) in the first 24 hours of admission from September 2013 to May 2015 were eligible for inclusion...
February 28, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28247290/determination-of-non-vitamin-k-oral-anticoagulant-noac-effects-using-a-new-generation-thrombelastography-teg-6s-system
#19
Kevin P Bliden, Rahul Chaudhary, Nafees Mohammed, Adina A Muresan, Carlos G Lopez-Espina, Eli Cohen, Gabriel Raviv, Marc Doubleday, Fowzia Zaman, Blessy Mathew, Udaya S Tantry, Paul A Gurbel
Non vitamin K oral anticoagulants (NOACs) do not require regular monitoring but information about their pharmacodynamic effect may be importantin situations like trauma, stroke oremergent surgery. Currently, no standardized point-of-care test is available to evaluate the anticoagulant effects of NOACs. We evaluated the anticoagulant effect of NOACs with the next generation point-of-care TEG assay (TEG® 6S) based on a fully-automated thrombelastography system. We used two TEG® 6S assays, the DTI assay and Anti-Factor Xa (AFXa) assay, to detect anticoagulant effects and classify NOACs...
February 28, 2017: Journal of Thrombosis and Thrombolysis
https://www.readbyqxmd.com/read/28240645/point-of-care-monitoring-for-the-management-of-trauma-induced-bleeding
#20
Alexander A Hanke, Hauke Horstmann, Michaela Wilhelmi
PURPOSE OF REVIEW: Knowledge of trauma-induced coagulopathy has been grown in the past and point-of-care suitable devices for coagulation testing have been introduced. Methodology and clinical application of different systems for point-of-care coagulation monitoring are shown with a focus on thrombelastography as measured by TEG, rotational thromboelastometry as measured by ROTEM and impedance aggregometry as measured by the multiplate analyser and ROTEM platelet. RECENT FINDINGS: Two different methods for point-of-care coagulation assessment are available: viscoelastic tests (ROTEM, TEG) and impedance aggregometry...
April 2017: Current Opinion in Anaesthesiology
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