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https://www.readbyqxmd.com/read/29792721/-use-of-viscoelastic-methods-in-surgery
#1
D Šmíd, J Zatloukal, T Kural, J Fichtl, V Opatrný, J Moláček
INTRODUCTION: Major liver resections are associated with high morbidity and mortality. The main causes of this fact include a significant blood loss which may be associated with this surgical procedure. Hemocoagulation disorder, diagnosed by standard laboratory tests, is very frequent in the postoperative period and often requires the administration of blood derivatives. Several recent studies, however, have questioned the presence of such coagulopathy when viscoelastic methods are used to assess the coagulation process...
2018: Rozhledy V Chirurgii: Měsíčník Československé Chirurgické Společnosti
https://www.readbyqxmd.com/read/29789817/so-2-absorption-in-emimcl-teg-deep-eutectic-solvents
#2
Dezhong Yang, Shaoze Zhang, De-En Jiang, Sheng Dai
Deep eutectic solvents (DESs) based on 1-ethyl-3-methylimidazolium chloride (EmimCl) and triethylene glycol (TEG) with different molar ratios (from 6 : 1 to 1 : 1) were prepared. FTIR and theoretical calculation indicated that the C2-H on the imidazolium ring form hydrogen bonds with the hydroxyl group rather than the ether O atom of the TEG. The EmimCl-TEG DESs can efficiently capture SO2; in particular, EmimCl-TEG (6 : 1) can capture 0.54 g SO2 per gram of solvent at 0.10 atm and 20 °C, the highest absorption amount for DESs under the same conditions...
May 23, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29787534/a-metal-organic-framework-reduces-thrombus-formation-and-platelet-aggregation-ex-vivo
#3
Teryn R Roberts, Megan J Neufeld, Michael A Meledeo, Andrew P Cap, Leopoldo C Cancio, Melissa M Reynolds, Andriy I Batchinsky
BACKGROUND: Management of hemostasis is a key challenge during extracorporeal life support (ECLS). Metal organic frameworks are being investigated for use as nitric oxide (NO) catalysts for incorporation into ECLS circuitry to prevent thrombosis at the blood-biomaterial interface. A specific metal organic framework, CuBTTri, has been shown to accelerate NO-release from bioavailable donors like S-nitrosoglutathione (GSNO). We hypothesized that CuBTTri would reduce thrombus formation in whole blood (WB) and inhibit platelet aggregation...
May 21, 2018: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/29781399/recovery-of-valuable-metals-from-polymetallic-mine-tailings-by-natural-microbial-consortium
#4
Narine Vardanyan, Garegin Sevoyan, Taron Navasardyan, Arevik Vardanyan
Possibilities for the recovery of non-ferrous and precious metals from Kapan polymetallic mine tailings (Armenia) were studied. The aim of this paper was to study possibilities of bioleaching of samples of concentrated tailings by the natural microbial consortium of drainage water. The extent of extraction of metals from the samples of concentrated tailings by natural microbial consortium reached 41 - 55% and 53 - 73% for copper and zinc, respectively. Metal leaching efficiencies of pure culture L. ferrooxidans Teg were higher namely 47- 93% and 73 - 81% for copper and zinc, respectively...
May 21, 2018: Environmental Technology
https://www.readbyqxmd.com/read/29774645/a-novel-rapidly-self-healing-host-guest-supramolecular-hydrogel-with-high-mechanical-strength-and-excellent-biocompatibility
#5
Zhifang Wang, Yipeng Ren, Ye Zhu, Lijing Hao, Yunhua Chen, Geng An, Hongkai Wu, Xuetao Shi, Chuanbin Mao
It is still a challenge to achieve both excellent mechanical strength and biocompatibility in hydrogels. Here we exploited two interactions to form a novel biocompatible, slicing-resistant and self-healing hydrogel. One is the molecular host-guest recognition between a host (isocyanatoethyl acrylate-modified β-cyclodextrin, β-CD-AOI2) and a guest (2-(2-(2-(2-(Adamantyl-1-oxy)ethoxy)ethoxy) ethoxy)ethanol acrylate, A-TEG-Ad) to form novel "three-arm" host-guest supramolecules (HGSMs). Another is the covalent bonding between HGSMs (achieved by UV-initiated polymerization) to form a strong network in the hydrogel...
May 18, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/29771491/modification-of-side-chains-of-conjugated-molecules-and-polymers-for-charge-mobility-enhancement-and-sensing-functionality
#6
Zitong Liu, Guanxin Zhang, Deqing Zhang
Organic semiconductors have received increasing attentions in recent years because of their promising applications in various optoelectronic devices. The key performance metric for organic semiconductors is charge carrier mobility, which is governed by the electronic structures of conjugated backbones and intermolecular/interchain π-π interactions and packing in both microscopic and macroscopic levels. For this reason, more efforts have been paid to the design and synthesis of conjugated frameworks for organic semiconductors with high charge mobilities...
May 17, 2018: Accounts of Chemical Research
https://www.readbyqxmd.com/read/29768282/baseline-thromboelastogram-as-a-predictor-of-left-ventricular-assist-device-thrombosis
#7
Shannon L Piche, Scott D Nei, Erin Frazee, Sarah D Schettle, Barry A Boilson, Matthew F Plevak, Ross A Dierkhising, John M Stulak
Left ventricular assist device (LVAD) pump thrombosis occurs in up to 8.4% of patients within 3-months postimplantation. Thromboelastography (TEG) could be used to signal hypercoagulability at LVAD implantation to predict patients at high risk for thrombosis. We sought to evaluate whether TEG maximum amplitude (MA) hypercoagulability (MA ≥69 mm) at the time of LVAD implantation predicts pump thrombosis. A single center, retrospective, nested case-control study was conducted using patients from January 1, 2005, to March 31, 2015...
May 15, 2018: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/29766129/is-thromboelastography-teg-based-resuscitation-better-than-empirical-1-1-transfusion
#8
Isaac W Howley, Elliott R Haut, Lenwoth Jacobs, Jonathan J Morrison, Thomas M Scalea
Thomboelastography (TEG) is a whole blood measure of coagulation which was originally described in the 1950s. However, it has only been in the last few decades that assays have become accessible and viable as a point-of-care test. Following the observation that hemorrhagic shock is associated with an intrinsic coagulopathy, TEG has been used as a method of diagnosing specific coagulation defects in order to direct individualized blood products resuscitation. An alternative transfusion strategy is the administration of fixed ratio products, a paradigm borne out of military experience...
2018: Trauma surgery & acute care open
https://www.readbyqxmd.com/read/29764673/comparison-between-thromboelastography-and-conventional-coagulation-test-should-we-abandon-conventional-coagulation-tests-in-polytrauma-patients
#9
Jaume Tur Martínez, Patrizio Petrone, Alexander Axelrad, Corrado P Marini
INTRODUCTION: TEG provides an in-vivo assessment of viscoelastic clot strength in whole blood compared with CCT, which may not reflect the influence of platelets. The aim of this study was to compare TEG vs. CCT in trauma patients stratified by mechanism of injury (MOI) and pre-existing coagulation status. METHODS: A retrospective, observational study of 230 polytrauma patients admitted to a University Hospital Level 1 Trauma Center, with TEG and CCT on admission stratified by MOI: multiple trauma (MT), isolated traumatic brain injury (TBI) or MT+TBI...
May 12, 2018: Cirugía Española
https://www.readbyqxmd.com/read/29758989/the-double-hazard-of-bleeding-and-thrombosis-in-hemostasis-from-a-clinical-point-of-view-a-global-assessment-by-rotational-thromboelastometry-rotem
#10
Olga Meltem Akay
Hemostasis is a complex dynamic process involving bleeding and thrombosis as two end-points. Conventional coagulation tests which are measured in plasma examine only isolated portions of the coagulation cascade, thereby giving no information on important interactions essential to the clinical evaluation of hemostatic function. Thromboelastography (TEG), originally described in 1948 has improved over the decades and become a valuable tool of coagulation testing because of the limitations of standard coagulation tests...
January 1, 2018: Clinical and Applied Thrombosis/hemostasis
https://www.readbyqxmd.com/read/29753821/thromboelastography-is-associated-with-surrogates-for-bleeding-after-pediatric-cardiac-surgery
#11
Sirisha Emani, Lynn A Sleeper, David Faraoni, Michelle Mulone, Fatoumata Diallo, James A DiNardo, Juan Ibla, Sitaram M Emani
BACKGROUND: Perioperative bleeding is a common complication in pediatric patients undergoing cardiac surgery. Although thromboelastography (TEG) has been utilized in patients undergoing adult cardiac surgery, limited data are available in pediatric patients. We hypothesize that TEG parameters may be associated with surrogate endpoints for postoperative bleeding in pediatric patients undergoing complex cardiac surgery. METHODS: In a retrospective study, TEG was obtained after protamine administration and upon intensive care unit (ICU) admission in pediatric patients (≤ 18yrs) undergoing cardiac surgery requiring cardiopulmonary bypass...
May 10, 2018: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29752099/n-desmethyl-tamoxifen-and-quercetin-loaded-multiwalled-cnts-a-synergistic-approach-to-overcome-mdr-in-cancer-cells
#12
Manish Kumar, Gajanand Sharma, Charu Misra, Rajendra Kumar, Bhupinder Singh, O P Katare, Kaisar Raza
Our aim was to develop multiwalled carbon nanotubes (MWCNTs)-based nanoconstructs for the codelivery of N-desmethyl tamoxifen (N-TAM) and a mild P-gp efflux inhibitor, i.e., quercetin (QT) to treat multiple drug resistant (MDR) cancer cells. The hypothesis banks on three-tier attack on the MDR mechanisms viz. drug derivatization, MWCNT permeation and P-gp inhibition. Tamoxifen was converted to N-TAM and was conjugated to carboxylated MWCNTs mediated by a biodegradable linker, i.e., tetraethylene glycol (TEG)...
August 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/29743762/thromboelastographic-analysis-of-hemostatic-abnormalities-in-dengue-patients-admitted-in-a-multidisciplinary-intensive-care-unit-a-cross-sectional-study
#13
V K Sureshkumar, Deepak Vijayan, Shamim Kunhu, Zuhail Mohamed, Sujith Thomas, Muraleedharan Raman
Background: Dengue fever is an important tropical infection causing significant mortality. The pathophysiology of hematological abnormalities in dengue remains poorly studied. In this study, we analyzed the hematological abnormalities by thromboelastography (TEG). Methods: This cross-sectional study evaluated complicated dengue patients with TEG. Thromboelastographic variables were categorized into six patterns: factor deficiency, platelet dysfunction, enzymatic hypercoagulability, combined enzymatic and platelet hypercoagulability, primary fibrinolysis, and secondary hyperfibrinolysis...
April 2018: Indian Journal of Critical Care Medicine
https://www.readbyqxmd.com/read/29729088/glyoxal-based-solvents-for-electrochemical-energy-storage-devices
#14
Lars Henning Heß, Andrea Balducci
In this work we report for the first time an investigation about the use of solvents 1,1,2,2-tetramethoxyethane, also called tetramethoxy glyoxal (TMG) and 1,1,2,2-tetraethoxyethane also called tetraethoxy glyoxal (TEG), which belong to the chemical family of carbonyl derivatives, as electrolyte components for supercapacitors (EDLCs) and lithium-ion batteries (LIBs). TEG and TMG are commercial solvents displaying a good set of properties, a low toxicity and a low price. We showed that while in the case of EDLCs the use of these solvents does appear particularly appealing, their use in LIB is certainly interesting...
May 4, 2018: ChemSusChem
https://www.readbyqxmd.com/read/29727528/a-prospective-evaluation-of-oral-yunnan-baiyao-therapy-on-thromboleastographic-parameters-in-apparently-healthy-dogs
#15
Colleen Tansey, Melissa L Wiebe, Gabrielle C Hybki, Jeffrey E Patlogar, Lisa A Murphy, Domenico Bianco, Reid K Nakamura
OBJECTIVE: To determine the effect of Yunnan Baiyao (YB) on hemostatic parameters measured by thromboelastography (TEG) in healthy dogs administered 1 capsule of YB orally twice daily for 1 week. DESIGN: Prospective study of client-owned dogs at a small animal specialty hospital. SETTING: Private referral center. ANIMALS: Eighteen client-owned adult dogs weighing at least 15 kg. INTERVENTIONS: Dogs had a baseline TEG performed and then each dog was administered 1 capsule of YB twice daily by mouth for 1 week and the TEG was reevaluated...
May 2018: Journal of Veterinary Emergency and Critical Care
https://www.readbyqxmd.com/read/29717878/electrostatically-driven-guest-binding-in-self-assembled-porous-network-at-the-liquid-solid-interface
#16
Kohei Iritani, Motoki Ikeda, Anna Yang, Kazukuni Tahara, Masaru Anzai, Keiji Hirose, Steven De Feyter, Jeffrey S Moore, Yoshito Tobe
We present here the construction of a self-assembled two-dimensional (2D) porous monolayer bearing a highly polar 2D space to study guest co-adsorption through electrostatic interactions at the liquid/solid interface. For this purpose, a dehydrobenzo[12]annulene (DBA) derivative, DBA-TeEG, having tetraethylene glycol (TeEG) groups at the end of the three alternating alkoxy chains connected by p-phenylene linkers was synthesized. As a reference host molecule, DBA-C10 having non-polar C10 alkyl chains, at three alternating terminals was employed...
May 2, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29714091/phenotypic-and-molecular-phylogenetic-analysis-provide-novel-insights-into-the-diversity-of-curtobacterium-flaccumfaciens
#17
Ebrahim Osdaghi, S Mohsen Taghavi, Silvia Calamai, Carola Biancalani, Matteo Cerboneschi, Stefania Tegli, Robert Harveson
A multi-phasic approach was used to decipher the phenotypic features, genetic diversity, and phylogenetic position of 46 Curtobacterium spp. strains isolated from dry beans and other annual crops in Iran and Spain. Pathogenicity tests, resistance to arsenic compounds, plasmid profiling and BOX-PCR were performed on the strains. Multilocus sequence analysis (MLSA) was also performed on five housekeeping genes (i.e. atpD, gyrB, ppk, recA, and rpoB) of all the strains, as well as five pathotype strains of the species...
May 1, 2018: Phytopathology
https://www.readbyqxmd.com/read/29710576/modeling-assisted-evaluation-of-direct-electricity-generation-from-waste-heat-of-wastewater-via-a-thermoelectric-generator
#18
Shiqiang Zou, Eurydice Kanimba, Thomas E Diller, Zhiting Tian, Zhen He
The thermal energy represents a significant portion of energy potential in municipal wastewater and may be recovered as electricity by a thermoelectric generator (TEG). Converting heat to all-purpose electricity by TEG has been demonstrated with large heat gradients, but its application in waste heat recovery from wastewater has not been well evaluated. Herein, a bench-scale Bi2 Te3 -based waste heat recovery system was employed to generate electricity from a low temperature gradient through a combination of experiments and mathematical modeling...
April 22, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29708302/congenital-dysfibrinogenaemia-assessed-by-whole-blood-thromboelastography
#19
A Wei, L Liao, L Xiang, J Yan, W Yang, G Nai, M Luo, D Deng, F Lin
INTRODUCTION: Congenital dysfibrinogenaemia (CD) is a rare hereditary blood disorder, and thromboelastography (TEG) can comprehensively assess the clotting function of patients. However, only few studies have focussed on the application of TEG in CD. We aim to investigate the clinical value of TEG in congenital CD. METHODS: We performed TEG and routine coagulation tests, including plasma prothrombin time (PT), activated partial thromboplastin time (APTT), thrombin time (TT), functional fibrinogen (Fg) concentration (Clauss method) and Fg concentration (PT-derived method) tests, in 17 patients with CD (experimental group) and 28 healthy individuals (control group)...
April 30, 2018: International Journal of Laboratory Hematology
https://www.readbyqxmd.com/read/29704268/characteristics-of-hemostasis-during-experimental-ehrlichia-canis-infection
#20
Sarah Shropshire, Christine Olver, Michael Lappin
BACKGROUND: Ehrlichia canis infection in dogs can cause thrombocytopenia and clinical evidence of bleeding. It is unknown why some dogs show signs of bleeding whereas others do not despite clinically relevant thrombocytopenia. HYPOTHESIS/OBJECTIVES: Activated platelets, decreased fibrinolysis or both mitigate bleeding tendency. Assess standard hemostatic variables, platelet dynamics, and specialized coagulation testing in dogs experimentally infected with E. canis to evaluate this clinical discrepancy...
April 27, 2018: Journal of Veterinary Internal Medicine
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