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https://www.readbyqxmd.com/read/28449483/epicardial-left-atrial-appendage-closure-comparison-of-surgical-techniques-in-an-ex-vivo-model
#1
Nikolas Mirow, Sebastian Vogt, Marc Irqsusi, Rainer Moosdorf, Andreas Kirschbaum
BACKGROUND: Formation of clots in the left atrial appendage (LAA) may lead to embolism and consecutive cerebral stroke. This risk is reduced by closure and resection. To address the efficacy of surgical LAA closure, resilience to pneumatic pressure was studied. Different surgical techniques were compared in an experimental model. METHODS: From freshly slaughtered pigs cardiopulmonary preparations were taken. The left atrium was clamped airtight and the LAA was cannulated...
March 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28448011/turbidimetry-on-human-washed-platelets-the-effect-of-the-pannexin1-inhibitor-brilliant-blue-fcf-on-collagen-induced-aggregation
#2
Filippo Molica, Séverine Nolli, Pierre Fontana, Brenda Renata Kwak
Turbidimetry is a laboratory technique that is applied to measure the aggregation of platelets suspended in either plasma (platelet-rich plasma, PRP) or in buffer (washed platelets), by the use of one or a combination of agonists. The use of washed platelets separated from their plasma environment and in the absence of anticoagulants allows for studying intrinsic platelet properties. Among the large panel of agonists, arachidonic acid (AA), adenosine di-phosphate (ADP), thrombin and collagen are the most frequently used...
April 6, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28446928/thromboelastographic-changes-during-laparoscopic-fundoplication
#3
Indre Zostautiene, Kristina Zvinienė, Darius Trepenaitis, Rolandas Gerbutavičius, Antanas Mickevičius, Rima Gerbutavičienė, Mindaugas Kiudelis
INTRODUCTION: Thromboelastography (TEG) is a technique that measures coagulation processes and surveys the properties of a viscoelastic blood clot, from its formation to lysis. AIM: To determine the possible hypercoagulability state and the effect of antithrombotic prophylaxis on thromboelastogram results and development of venous thrombosis during laparoscopic fundoplication. MATERIAL AND METHODS: The study was performed on 106 patients who were randomized into two groups...
2017: Wideochirurgia i Inne Techniki Mało Inwazyjne, Videosurgery and Other Miniinvasive Techniques
https://www.readbyqxmd.com/read/28446310/-pdgf-bb-promotes-cfu-gm-and-cfu-mk-formation-and-its-possible-mechnism
#4
Li-Jing Mao, Jie-Yu Ye, En-Yu Liang, Mo Yang
OBJECTIVE: To investigate the effect of platelet-derived growth factor (PDGF-BB) on the formation of granulocyte-monocyte colony forming unit (CFU-GM) and megakaryocyte colony forming unit (CFU-MK) and its anti-apoptotic effect on CHRF cells. METHODS: The CFU-GM and CFU-MK of murine and human bone marrow cells were cultured in vitro by using plasma clot culture system. The anti-apoptotic effect of PDGF-BB on CHRF cells and its mechanism were clarified by flow cytometry...
April 2017: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/28446109/clot-retrieval-and-acute-stroke-care
#5
Yun Tae Hwang, Yash Gawarikar
No abstract text is available yet for this article.
May 1, 2017: Medical Journal of Australia
https://www.readbyqxmd.com/read/28445754/probing-the-dynamics-of-clot-bound-thrombin-at-venous-shear-rates
#6
Laura M Haynes, Thomas Orfeo, Kenneth G Mann, Stephen J Everse, Kathleen E Brummel-Ziedins
In closed system models of fibrin formation, exosite-mediated thrombin binding to fibrin contributes to clot stability and is resistant to inhibition by antithrombin/heparin while still susceptible to small, active-site inhibitors. Each molecule of fibrin can bind ∼1.6 thrombin molecules at low-affinity binding sites (Kd = 2.8 μM) and ∼0.3 molecules of thrombin at high-affinity binding sites (Kd = 0.15 μM). The goal of this study is to assess the stability of fibrin-bound thrombin under venous flow conditions and to determine both its accessibility and susceptibility to inhibition...
April 25, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28444800/endoscopic-meatus-scoring-scale-versus-sniff-test-to-predict-insertability-before-transnasal-endoscopy-a-prospective-randomized-study
#7
Chi-Tan Hu, Wei-Yi Lei, Jen-Shung Lin, Jui-Sheng Hung
BACKGROUND AND AIM: Sniff test is a common method before unsedated transnasal EGD (UT-EGD) to select a nostril insertion site. Yet, there is no objective method to select a more specific meatus insertion tract for anesthesia and insertion. We devised a endoscopic meatus scoring scale by anterior meatuscopy to select the most optimal meatus insertion tract. We hypothesized that meatuscopy instead of sniff test might improve tolerance and reduce adverse events during nasal anesthesia and UT-EGD...
April 26, 2017: Journal of Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28442910/targeted-delivery-of-thymosin-beta-4-to-the-injured-myocardium-using-creka-conjugated-nanoparticles
#8
Zheyong Huang, Yanan Song, Zhiqing Pang, Bo Zhang, Hongbo Yang, Hongtao Shi, Jing Chen, Hui Gong, Juying Qian, Junbo Ge
PURPOSE: Thymosin beta 4 (Tβ4) has multiple beneficial facets for myocardial injury, but its efficiency is limited by the low local concentration within the infarct. Here, we established a Tβ4 delivery system for cardiac repair based on the interaction between the abundant fibrin in the infarct zone and the fibrin-targeting moiety clot-binding peptide cysteine-arginine-glutamic acid-lysine-alanine (CREKA). METHODS AND RESULTS: CREKA and Tβ4 were conjugated to nanoparticles (CNP-Tβ4)...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28442771/double-stranded-dna-induces-a-prothrombotic-phenotype-in-the-vascular-endothelium
#9
Erik Gaitzsch, Thomas Czermak, Andrea Ribeiro, Yvonn Heun, Monica Bohmer, Monika Merkle, Hanna Mannell, Christian Schulz, Markus Wörnle, Joachim Pircher
Double-stranded DNA (dsDNA) constitutes a potent activator of innate immunity, given its ability to bind intracellular pattern recognition receptors during viral infections or sterile tissue damage. While effects of dsDNA in immune cells have been extensively studied, dsDNA signalling and its pathophysiological implications in non-immune cells, such as the vascular endothelium, remain poorly understood. The aim of this study was to characterize prothrombotic effects of dsDNA in vascular endothelial cells. Transfection of cultured human endothelial cells with the synthetic dsDNA poly(dA:dT) induced upregulation of the prothrombotic molecules tissue factor and PAI-1, resulting in accelerated blood clotting in vitro, which was partly dependent on RIG-I signalling...
April 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28442600/effect-of-rivaroxaban-on-preventing-deep-vein-thrombosis-in-aged-diabetics-with-femoral-neck-fractures-after-hip-replacement
#10
Yi-Min Zhang, Xin Jiang, Yan-Shan Sun
This study estimates the effect of rivaroxaban on preventing deep-vein thrombosis (DVT) in aged diabetics with femoral neck fractures after hip replacement. Our study was composed of 236 aged diabetics with femoral neck fractures, which were divided into the rivaroxaban and control groups. Reaction time (R time), clot formation time (K time), alpha angle (α), maximum amplitude (MA), clot elasticity (G) and coagulation index (CI), prothrombin time (PT) and activated partial thromboplastin time (APTT) were measured...
April 25, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/28441050/comparison-of-platelet-function-and-viscoelastic-test-results-between-healthy-dogs-and-dogs-with-naturally-occurring-chronic-kidney-disease
#11
Alicia Dudley, Julie K Byron, Mary Jo Burkhard, Emma Warry, Julien Guillaumin
OBJECTIVE To compare platelet function and viscoelastic test results between healthy dogs and dogs with chronic kidney disease (CKD) to assess whether dogs with CKD have platelet dysfunction and altered blood coagulation. ANIMALS 10 healthy control dogs and 11 dogs with naturally occurring CKD. PROCEDURES Blood and urine were collected once from each dog for a CBC, serum biochemical analysis, urinalysis, and determination of the urine protein-to-creatinine ratio, prothrombin time, activated partial thromboplastin time, plasma fibrinogen concentration, and antithrombin activity...
May 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/28440618/design-of-antibacterial-polyethersulfone-membranes-via-covalently-attaching-hydrogel-thin-layers-loaded-with-ag-nanoparticles
#12
Min He, Qian Wang, Rui Wang, Yi Xie, Weifeng Zhao, Changsheng Zhao
In order to inhibit the bacteria attachment and the subsequent formation of bio-films on polyethersulfone (PES) membranes, poly(sulfobetaine methacrylate) (PSBMA)/poly(sodium acrylate) (PAANa) antibacterial hydrogel thin layers were covalently attached onto the membranes, followed by loading Ag nanoparticles. In our strategy, double bonds were firstly introduced onto PES membrane surfaces to provide anchoring sites, and then the hydrogel layers were synthesized on the membrane surfaces via UV light initiated cross-linking copolymerization...
April 25, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28440186/the-double-roles-of-the-prostaglandin-e2-ep2-receptor-in-intracerebral-hemorrhage
#13
Xu Luo, Qiquan Zhu, Jie Zhang, Qin Huang, Zongyi Xie, Yuan Cheng
Intracerebral hemorrhage (ICH), a subtype of stroke, brings high morbidity and mortality to human beings. Multiple studies indicate that neuroinflammation, excitotoxicity, oxidative stress, cytotoxicity resulted from the degradation products of blood clot play vital roles in ICH-induced secondary brain injury, which contributes to deterioration of neurological outcome. Prostaglandin E2 (PGE2), a type of prostanoids commonly up-regulated in these progresses, is known to modulate numerous cellular and molecular processes and involve in various diseases, including ICH, cerebral ischemic, Alzheimer's disease (AD) and amyotrophic lateral sclerosis (ALS) etc...
April 24, 2017: Current Drug Targets
https://www.readbyqxmd.com/read/28440032/discrepancies-between-the-one-stage-clotting-assay-and-the-chromogenic-assay-in-haemophilia-b
#14
K Kihlberg, K Strandberg, S Rosén, R Ljung, J Astermark
INTRODUCTION: Assay discrepancy in factor VIII activity between the one-stage and the chromogenic assays has been described in approximately one third of patients with non-severe haemophilia A. Whether assay discrepancy may also occur in patients with haemophilia B remains unknown. AIM: This study compared the results from the one-stage and the chromogenic assays in patients with haemophilia B. METHODS: Plasma samples from patients with haemophilia B attending the haemophilia centre in Malmö, Sweden, were collected after a wash-out period of more than 7 days and analysed with both assays...
April 24, 2017: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/28440005/comparing-the-burden-of-illness-of-haemophilia-between-resource-constrained-and-unconstrained-countries-the-s%C3%A3-o-paulo-toronto-hemophilia-study
#15
J D A Carneiro, V Blanchette, M C Ozelo, S V Antunes, P R Villaca, N L Young, D Castro, L R Brandão, M Carcao, A Abad, B M Feldman
INTRODUCTION: Although the regular replacement of clotting factor concentrates (prophylaxis) has been well established as the standard of care for severe haemophilia, the high cost of factor concentrates has limited access to prophylaxis in countries with under-developed or developing economies. AIMS: We studied the health gap that could be addressed by providing unlimited access to clotting factor concentrates with implementation of long-term prophylaxis initiated from an early age in life...
April 24, 2017: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/28439967/involvement-of-heparanase-procoagulant-domain-in-bleeding-and-wound-healing
#16
Yonatan Crispel, Shourouk Ghanem, Judith Attias, Inna Kogan, Benjamin Brenner, Yona Nadir
BACKGROUND: Heparanase, known to be involved in angiogenesis and metastasis, was shown to form a complex with tissue factor (TF) and to enhance the generation of factor Xa. Our study demonstrated that peptides derived from TF pathway inhibitor (TFPI)-2 impeded the procoagulant effect of heparanase and attenuated inflammation, tumor growth and vascularization. AIMS: The present study aimed to identify the procoagulant domain in the heparanase molecule and to evaluate its effects in a model of wound healing that involves inflammation and angiogenesis...
April 25, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28439906/regenerative-endodontic-treatment-of-perforated-internal-root-resorption-a-case-report
#17
M E Kaval, P Güneri, M K Çalışkan
AIM: To present the regenerative endodontic treatment procedure of a perforated internal root resorption case and its' clinical and radiographic findings after two years. SUMMARY: A 14-year-old female patient was referred complaining of moderate pain associated with her maxillary left lateral incisor. After radiographic examination, a perforated internal resorption lesion in the middle third of tooth 22 was detected. Under local anaesthesia and rubber dam isolation, an access cavity was prepared and the root canal was shaped using K-files under copious irrigation with 1% NaOCl, 17% EDTA and distilled water...
April 25, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28439440/a-comparison-of-the-effects-of-20-mannitol-and-3-nacl-on-coagulation-parameters-in-vitro-using-rotem-a-prospective-randomized-crossover-study
#18
Achmet Ali, Bilge Şencan, Pulat Akın Sabancı, Demet Altun, Aylin Tetik, Lerzan Recep Doğan, İbrahim Özkan Akıncı
OBJECTIVE: The aim of the present study is to compare the effect of 20% mannitol and 3% NaCl on blood coagulation in vitro using rotational thromboelastometry (ROTEM). METHODS: Twenty-millilitre blood samples were obtained from 15 volunteers. In each group, 2 mL blood samples were collected into both polypropylene tubes and EDTA tubes for ROTEM and hemogram analysis. After sampling, blood samples were diluted with test solutions. Group C (control): Only blood, Group M (mannitol): 7% vol 20% mannitol concentration in the blood, Group hypertonic saline (HS): 7% vol 3% hypertonic saline (NaCl) in the blood, Group M/H (mannitol and hydroxyethyl starch solutions [HES]): 6% vol 20% mannitol concentration and 8% vol HES in the blood and Group HS/H (hypertonic saline and HES): 6% vol 3% hypertonic saline concentration and 8% vol HES in the blood...
April 2017: Turkish Journal of Anaesthesiology and Reanimation
https://www.readbyqxmd.com/read/28437748/rational-and-timely-haemostatic-interventions-following-cardiac-surgery-coagulation-factor-concentrates-or-blood-bank-products
#19
Mariann Tang, Christian Fenger-Eriksen, Per Wierup, Jacob Greisen, Jørgen Ingerslev, Vibeke Hjortdal, Benny Sørensen
BACKGROUND: Cardiac surgery may cause a serious coagulopathy leading to increased risk of bleeding and transfusion demands. Blood bank products are commonly first line haemostatic intervention, but has been associated with hazardous side effect. Coagulation factor concentrates may be a more efficient, predictable, and potentially a safer treatment, although prospective clinical trials are needed to further explore these hypotheses. This study investigated the haemostatic potential of ex vivo supplementation of coagulation factor concentrates versus blood bank products on blood samples drawn from patients undergoing cardiac surgery...
April 5, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/28437457/tissue-factor-dependent-coagulation-activation-by-heme-a-thromboelastometry-study
#20
Gleice Regina de Souza, Bidossessi Wilfried Hounkpe, Maiara Marx Luz Fiusa, Marina Pereira Colella, Joyce M Annichino-Bizzacchi, Fabiola Traina, Fernando Ferreira Costa, Erich Vinicius De Paula
Heme has been characterized as potent trigger of inflammation. In hemostasis, although heme has been shown to both induce and inhibit different compartments of hemostasis, its net effect on the hemostatic balance, and the biological relevance of these effects remain to be determined. Herein we evaluated the effect of heme on hemostasis using a global assay able to generate clinically relevant data in several other complex hemostatic diseases. Citrated whole blood samples from healthy participants were stimulated by heme or vehicle and incubated for 4h at 37°C...
2017: PloS One
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