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https://www.readbyqxmd.com/read/28527902/the-provisional-matrix-setting-the-stage-for-tissue-repair-outcomes
#1
EDITORIAL
Thomas H Barker, Adam J Engler
Since its conceptualization in the 1980s, the provisional matrix has often been characterized as a simple fibrin-containing scaffold for wound healing that supports the nascent blood clot and is functionally distinct from the basement membrane. However subsequent advances have shown that this matrix is far from passive, with distinct compositional differences as the wound matures, and providing an active role for wound remodeling. Here we review the stages of this matrix, provide an update on the state of our understanding of provisional matrix, and present some of the outstanding issues related to the provisional matrix, its components, and their assembly and use in vivo...
July 2017: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/28525329/thromboelastographic-profile-of-goat-blood-after-the-experimental-injury-of-the-femoral-artery-and-use-of-quikclot-gauze-and-celox-gauze-dressings
#2
P Sobiech, Z Adamiak, P Holak, P Jastrzębski, J Rogowski, M Brzeziński, K Bury, M Jałyński, W Baumgartner
The aim of this study was to evaluate the suitability of thromboelastometry for the analysis of blood test results in goats after the use of hemostatic dressings to control massive bleeding. The study was carried out on 12 goats, 6 animals in each of two subgroups. In all experimental animals incision of the femoral artery was performed, and bleeding was controlled with QuikClot gauze in the first group and Celox gauze in the second group. Dressings were applied for 60 minutes. Blood samples for thromboelastometry were collected from the jugular vein before the incision and 60 min after the application of a dressing...
March 28, 2017: Polish Journal of Veterinary Sciences
https://www.readbyqxmd.com/read/28523092/management-of-a-life-threatening-bleeding-following-extraction-of-deciduous-second-molar-related-to-a-capillary-haemangioma
#3
REVIEW
Amr Amin Ghanem, Yasser Nabil El Hadidi
Various forms of vascular lesion affect the head and neck region. The head and neck vascular lesions are classified into neoplasms and malformations. Neoplasm presents either as hemangioma or lymphangioma; neoplasm usually presents in young age compared with vascular malformation. A 9-year-old female patient presented to the outpatient clinic referred from the department of pedodontics after extraction of a right mandibular second deciduous molar. Extraction was done by dental GP in outpatient clinic. Massive bleeding followed the extraction...
June 2017: Craniomaxillofacial Trauma & Reconstruction
https://www.readbyqxmd.com/read/28522812/selection-and-characterization-of-a-dna-aptamer-inhibiting-coagulation-factor-xia
#4
David A Donkor, Varsha Bhakta, Louise J Eltringham-Smith, Alan R Stafford, Jeffrey I Weitz, William P Sheffield
Factor XIa (FXIa) is a serine protease that catalyzes the activation of Factor IX (FIX) in the blood coagulation cascade. FXIa and its precursor FXI are emergent therapeutic targets for the development of safer anticoagulant agents. Here, we sought a novel DNA-based agent to inhibit FXIa. Towards this goal, an 80 base, single-stranded DNA aptamer library (containing a 40 base randomized core) was screened for FXIa-binding candidates, using ten rounds of positive and negative selection. After selection, 6 of 89 different sequences inhibited FXIa-mediated chromogenic substrate S2366 cleavage...
May 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28521997/biodegradable-collagen-sponge-reinforced-with-chitosan-calcium-pyrophosphate-nanoflowers-for-rapid-hemostasis
#5
Tingsheng Yan, Feng Cheng, Xinjing Wei, Yudong Huang, Jinmei He
Efficient and biodegradable hemostatic materials become increasingly important in civilian and military clinical. However, traditional hemostatic materials are difficult to achieve expected effects especially in parenchymal organs with rich vascularity. In facing these challenges, we designed a biodegradable collagen sponge reinforced with chitosan/calcium pyrophosphate nanoflowers (CPNFs-Col sponge) for rapid hemostasis. With specific performances, such as rapid water absorption ability, the positive surface rich in amino groups and high specific surface area (952...
August 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28520166/operator-based-variability-of-equine-thromboelastography
#6
Kristen Thane, Daniela Bedenice, Ana Pacheco
OBJECTIVE: To determine the extent of intraoperator (between duplicate samples) and interoperator (between different operators) variability in equine thromboelastography (TEG). DESIGN: Kaolin-activated TEG was performed in duplicate by operator-pair A/B or A/C (2 groups of 10 horses) using discrete setups, within 30-45 minutes of vacuum-assisted blood collection. Recorded TEG variables included clot initiation time (R), clot formation time (K), rate of clot formation (α), clot strength (MA), and viscoelastic/shear strength (G)...
May 18, 2017: Journal of Veterinary Emergency and Critical Care
https://www.readbyqxmd.com/read/28513800/sociodemographic-factors-and-functional-capacity-of-elderly-affected-by-stroke
#7
Michelinne Oliveira Machado Dutra, Alexsandro Silva Coura, Inacia Sátiro Xavier de França, Bertha Cruz Enders, Mayara Araújo Rocha
Introduction: Diseases of old age have shown increasing prevalence in society. One of them is stroke, which can be conceptualized as the interruption of cerebral blood supply due to a leakage or blood vessel obstruction caused by clots. Objective: To verify the associations between sociodemographic factors and the functional capacity of elderly affected by stroke. Methods: This is an epidemiological, cross-sectional, and quantitative study, including 118 elderly people with paralyses due to stroke, who were registered in one of the Family Health Strategies units of Campina Grande, Paraíba, Brazil...
January 2017: Revista Brasileira de Epidemiologia, Brazilian Journal of Epidemiology
https://www.readbyqxmd.com/read/28512053/effect-of-chitosan-and-coagulation-factors-on-the-wound-repair-phenotype-of-bioengineered-blood-clots
#8
Caroline D Hoemann, Catherine Marchand, Georges-Etienne Rivard, Hani El-Gabalawy, Patrice E Poubelle
Controlling the blood clot phenotype in a surgically prepared wound is an evolving concept in scaffold-guided tissue engineering. Here, we investigated the effect of added chitosan (80% or 95% Degree of Deacetylation, DDA) or coagulation factors (recombinant human Factor VIIa, Tissue Factor, thrombin) on inflammatory factors released by blood clots. We tested the hypothesis that 80% DDA chitosan specifically enhances leukotriene B4 (LTB4) production. Human or rabbit whole blood was combined with isotonic chitosan solutions, coagulation factors, or lipopolysaccharide, cultured in vitro at 37°C, and after 4hours the serum was assayed for LTB4 or inflammatory factors...
May 13, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28510738/pharmacokinetic-pharmacodynamic-model-for-unfractionated-heparin-dosing-during-cardiopulmonary-bypass
#9
X Delavenne, E Ollier, S Chollet, F Sandri, J Lanoiselée, S Hodin, A Montmartin, J-F Fuzellier, P Mismetti, L Gergelé
Background: High-dose heparin is used during cardiopulmonary bypass (CPB) to prevent thrombosis in the circuits used for extracorporeal circulation. The aim of this study was, initially, to develop a population pharmacokinetic/pharmacodynamic (PK/PD) model to assess the variability of PK/PD parameters and their correlation with the results of the routine haemostatic test activated clotting time (ACT) and thereafter to develop a Bayesian estimator enabling an individualized dosing strategy...
May 1, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/28505011/in-vitro-assessment-of-the-effect-of-dabigatran-on-thrombosis-of-adult-and-neonatal-plasma-comparisons-using-thromboelastography-and-microscopic-visualization-of-fibrin-clot-structure
#10
Fadi F Nossair, Howard H W Chan, Jorell Gantioqui, Helen M Atkinson, Leslie R Berry, Anthony K C Chan
: Thromboelastography (TEG) is a global assay used for evaluating features of clot formation in vitro. Dabigatran is a reversible direct inhibitor of thrombin that has not been studied in neonates using a sophisticated global assay, such as TEG. Neonatal hemostasis differs from adult hemostasis in both quantitative and qualitative characteristics. Our aim was to compare the TEG clotting profile of neonatal and adult platelet-poor plasma when exposed to different concentrations of dabigatran. We used commercially collected adult pooled plasma and neonatal cord blood collected from placentas of healthy full term newborns...
May 12, 2017: Blood Coagulation & Fibrinolysis: An International Journal in Haemostasis and Thrombosis
https://www.readbyqxmd.com/read/28503981/platelet-reactivity-influences-clot-structure-as-assessed-by-fractal-analysis-of-viscoelastic-properties
#11
Rebecca B Knowles, Matthew J Lawrence, Plinio M Ferreira, Melissa A Hayman, Lindsay A D'Silva, Sophie N Stanford, Ahmed Sabra, Arthur T Tucker, Karl M Hawkins, Phylip R Williams, Timothy D Warner, Phillip A Evans
Despite the interwoven nature of platelet activation and the coagulation system in thrombosis, few studies relate both analysis of protein and cellular parts of coagulation in the same population. In the present study, we use matched ex vivo samples to determine the influences of standard antiplatelet therapies on platelet function and use advanced rheological analyses to assess clot formation. Healthy volunteers were recruited following fully informed consent then treated for 7 days with single antiplatelet therapy of aspirin (75 mg) or prasugrel (10 mg) or with dual antiplatelet therapy (DAPT) using aspirin (75 mg) plus prasugrel (10 mg) or aspirin (75 mg) plus ticagrelor (90 mg)...
May 15, 2017: Platelets
https://www.readbyqxmd.com/read/28503126/in-vitro-and-ex-vivo-measurement-of-prophylactic-dabigatran-concentrations-with-a-new-ecarin-based-thromboelastometry-test
#12
Mareike Kristina Körber, Elisabeth Langer, Martin Köhr, Klaus-Dieter Wernecke, Wolfgang Korte, Christian von Heymann
BACKGROUND: An increasing number of oral anticoagulants has been approved, including dabigatran etexilate (DE). DE is a direct thrombin inhibitor that requires no routine monitoring, but, if necessary (e.g. urgent surgery etc.), the diluted thrombin time measured with Hemoclot® has shown reliable results. So far, no point-of-care (PoC) assay is available to measure DE effects. The EcaTEM assay uses ecarin to initiate the coagulation cascade at the step of thrombin generation and measures the clotting time (CT) by thromboelastometry...
April 2017: Transfusion Medicine and Hemotherapy
https://www.readbyqxmd.com/read/28503124/factor-xiii-deficiency-and-thrombocytopenia-are-frequent-modulators-of-postoperative-clot-firmness-in-a-surgical-intensive-care-unit
#13
Sarah von Rappard, Corina Hinnen, Roger Lussmann, Manuela Rechsteiner, Wolfgang Korte
OBJECTIVE: Fibrinogen and factor XIII (FXIII) have been shown to critically influence clot firmness in the intraoperative setting and thus likely influence intraoperative bleeding. We were interested to identify potential modulators of postoperative clot firmness in a tertiary care hospital surgical intensive care unit setting, independent of their clinical course during surgery. METHODS: 272 day-shift consecutive patients were evaluated for whole blood clot firmness evaluated by the ROTEM® EXTEM thrombelastometric assay and various potential modulators of clot firmness upon arrival at the surgical intensive care unit (SICU)...
April 2017: Transfusion Medicine and Hemotherapy
https://www.readbyqxmd.com/read/28502961/haptoglobin-reduces-inflammatory-cytokine-inf-%C3%AE-and-facilitates-clot-formation-in-acute-severe-burn-rat-model
#14
Hiroyuki Koami, Yuichiro Sakamoto, Taku Miyasho, Ryo Noguchi, Norio Sato, Keita Kai, Kosuke Chris Yamada, Satoshi Inoue
Haptoglobin exerts renal protective function by scavenging free hemoglobin from the urine and blood stream in patients with hemolytic disorders. Recent studies elucidate the relationships between haptoglobin and inflammation. In addition, coagulopathy is often induced by systemic inflammation characterized by the presence of vascular endothelial damage. We hypothesize that haptoglobin might have an anti-inflammatory effect and affect hypercoagulability using rat burn model. Thirty anesthetized rats of six-weeks of age received over 30% full-thickness scald burn on the dorsal skin surface...
2017: Journal of Nippon Medical School, Nippon Ika Daigaku Zasshi
https://www.readbyqxmd.com/read/28500652/freeze-dried-plasma-enhances-clot-formation-and-inhibits-fibrinolysis-in-the-presence-of-tissue-plasminogen-activator-similar-to-pooled-liquid-plasma
#15
Benjamin R Huebner, Ernest E Moore, Hunter B Moore, Angela Sauaia, Gregory Stettler, Monika Dzieciatkowska, Kirk Hansen, Anirban Banerjee, Christopher C Silliman
BACKGROUND: Systemic hyperfibrinolysis is an integral part of trauma-induced coagulopathy associated with uncontrolled bleeding. Recent data suggest that plasma-first resuscitation attenuates hyperfibrinolysis; however, the availability, transport, storage, and administration of plasma in austere environments remain challenging and have limited its use. Freeze-dried plasma (FDP) is a potential alternative due to ease of storage, longer shelf life, and efficient reconstitution. FDP potentially enhances clot formation and resists breakdown better than normal saline (NS) and albumin and similar to liquid plasma...
May 12, 2017: Transfusion
https://www.readbyqxmd.com/read/28500649/a-comparative-study-using-thrombin-generation-and-three-different-inr-methods-in-patients-on-vitamin-k-antagonist-treatment
#16
N Riva, K Vella, S Meli, K Hickey, D Zammit, C Calamatta, M Makris, S Kitchen, W Ageno, A Gatt
INTRODUCTION: Vitamin K antagonist (VKA) treatment requires routine monitoring using the international normalized ratio (INR). However, different INR assays may vary in their results. The aim of this study was to assess the agreement of three different INR methods, compared with thrombin generation, in patients on VKA treatment. METHODS: Sixty patients attending the Anticoagulation Clinic at Mater Dei Hospital (Msida, Malta) for VKA monitoring between August and September 2015 were enrolled...
May 12, 2017: International Journal of Laboratory Hematology
https://www.readbyqxmd.com/read/28498661/mesoporous-silica-nanoparticles-encapsulated-agarose-and-heparin-as-anticoagulant-and-resisting-bacterial-adhesion-coating-for-biomedical-silicone
#17
Fan Wu, Tingting Xu, Guangyao Zhao, Shuangshuang Meng, Mimi Wan, Bo Chi, Chun Mao, Jian Shen
Silicone catheter has been widely used in peritoneal dialysis. The research missions of improving blood compatibility and the ability of resisting bacterial adhesion of silicone catheter have been implemented for the biomedical requirements. However, most of modification methods of surface modification were only able to develop the blood-contacting biomaterials with good hemocompatibility. It is difficult for the biomaterials to resist bacterial adhesion. Here, agarose was selected to resist bacterial adhesion, and heparin was chosen to improve hemocompatibility of materials...
May 17, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28498140/effect-of-albumin-in-combination-with-mannitol-on-whole-blood-coagulation-in-vitro-assessed-by-thromboelastometry
#18
Kadri Lillemäe, Antti T Laine, Alexey Schramko, Tomi T Niemi
BACKGROUND: Albumin and mannitol may interfere with hemostasis, but their coinfluence is unclear. We aimed to determine the effects of albumin alone and in combination with mannitol or Ringer acetate (RAC) on hemostasis in crossover in vitro study. MATERIALS AND METHODS: From citrated fresh whole blood withdrawn from 10 volunteers, we prepared 2.5, 5, 10, 15, and 20 vol% dilutions of 4% albumin (Alb group). Each sample was thereafter diluted by 15% mannitol (Alb/Man group) or RAC (Alb/RAC group) at a ratio of 9:1...
May 11, 2017: Journal of Neurosurgical Anesthesiology
https://www.readbyqxmd.com/read/28497841/effect-of-fluid-resuscitation-with-balanced-solutions-on-platelets-in-vitro-simulation-of-20-volume-substitution
#19
Łukasz J Krzych, Piotr F Czempik
BACKGROUND: Fluid resuscitation in massive bleeding may cause coagulation disorders by dilution of platelets and clotting factors or by the definite influence on theirfunction. The aim of this study was to investigate the effects of balanced crystalloid and colloid solutions on platelets (PLT) in vitro using complex assessment of coagulation. METHODS: The study group was comprised of 32 American Society of Anesthesiologists physical status class I male volunteers, aged 21-35 (29 ± 4) years, weighting 59-103 (81...
May 12, 2017: Cardiology Journal
https://www.readbyqxmd.com/read/28497494/global-assays-of-fibrinolysis
#20
REVIEW
A Ilich, I Bokarev, N S Key
Fibrinolysis is an important and integral part of the hemostatic system. Acting as a balance to blood coagulation, the fibrinolytic system protects the body from unwanted thrombus formation and occlusion of blood vessels. As long as blood coagulation and fibrinolysis remain in equilibrium, response to injury, such as vessel damage, is appropriately regulated. However, alterations in this balance may lead to thrombosis or bleeding. A variety of methods have been proposed to assess fibrinolytic activity in blood or its components, but due to the complexity of the system, the design of a "gold standard" assay that reflects overall fibrinolysis has remained an elusive goal...
May 12, 2017: International Journal of Laboratory Hematology
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