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https://www.readbyqxmd.com/read/28535516/citrate-anticoagulation-during-continuous-renal-replacement-therapy
#1
Davide Ricci, Laura Panicali, Maria Grazia Facchini, Elena Mancini
During extracorporeal dialysis, some anticoagulation strategy is necessary to prevent the coagulation of blood. Heparin has historically been used as an anticoagulant because of its efficacy combined with low cost. However, a variable incidence of hemorrhagic complications (5-30%) has been documented in patients undergoing continuous renal replacement therapy (CRRT) with heparin as an anticoagulant. Citrate has anticoagulation properties secondary to its ability to chelate calcium, which is necessary for the coagulation cascade...
2017: Contributions to Nephrology
https://www.readbyqxmd.com/read/28535438/determination-of-edoxaban-equivalent-concentrations-in-human-plasma-by-an-automated-anti-factor-xa-chromogenic-assay
#2
Ling He, Jarema Kochan, Min Lin, Alexander Vandell, Karen Brown, Francois Depasse
INTRODUCTION: This phase I, open-label, multiple-dose, two-treatment study assessed the relationship between edoxaban equivalent concentration derived from an anti-FXa assay with the summed concentration of edoxaban and its active metabolite, M-4, as assessed by liquid chromatography coupled with tandem mass spectrometry (LC/MS/MS). This study also assessed the relationship between edoxaban plasma concentrations assessed by LC/MS/MS in sodium citrate and lithium heparin tubes. MATERIALS AND METHODS: Healthy volunteers were randomized to receive once-daily edoxaban 60mg or 90mg for 5days (15 participants per treatment group)...
May 7, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/28535419/comparison-of-the-efficacy-of-fixed-dose-enoxaparin-and-adjusted-dose-unfractionated-heparin-in-patients-with-cerebral-venous-thrombosis
#3
Pat Korathanakhun, Chusana Petpichetchian, Wongchan Petpichetchian, Pornchai Sathirapanya
OBJECTIVE: Anticoagulants are the standard treatment for cerebral venous thrombosis (CVT). Although low-molecular-weight heparin (LMWH) is recommended in CVT, the specific type and dosage regimen of LMWH have never been specifically suggested. This study compared the clinical outcomes and adverse events in patients who received adjusted-dose unfractionated heparin (AD-UFH) versus fixed-dose enoxaparin (FD-E). METHODS: A retrospective cohort study was conducted at a university hospital in Thailand...
May 10, 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/28534557/-circuit-life-span-of-continuous-renal-replacement-therapy-in-critically-ill-patients-with-or-without-conventional-anticoa-gulation-an-observational-prospective-study
#4
M Sanz Ganuza, F Hidalgo Martínez, N García-Fernández
BACKGROUND: The aim of this study was to describe the efficacy, security and viability of an anticoagulation system with continuous infusion of unfractionated heparin (UFH) versus one without any type of anticoagulant using 0.9% physiological saline washings, in critically ill patients with continuous renal replacement therapy (CRRT) and different risks of bleeding. METHODS: From October 2013 to April 2015 we conducted an observational prospective study in the intensive care unit (ICU)...
April 30, 2017: Anales del Sistema Sanitario de Navarra
https://www.readbyqxmd.com/read/28534487/rules-of-engagement-between-%C3%AE-v%C3%AE-6-integrin-and-foot-and-mouth-disease-virus
#5
Abhay Kotecha, Quan Wang, Xianchi Dong, Serban L Ilca, Marina Ondiviela, Rao Zihe, Julian Seago, Bryan Charleston, Elizabeth E Fry, Nicola G A Abrescia, Timothy A Springer, Juha T Huiskonen, David I Stuart
Foot-and-mouth disease virus (FMDV) mediates cell entry by attachment to an integrin receptor, generally αvβ6, via a conserved arginine-glycine-aspartic acid (RGD) motif in the exposed, antigenic, GH loop of capsid protein VP1. Infection can also occur in tissue culture adapted virus in the absence of integrin via acquired basic mutations interacting with heparin sulphate (HS); this virus is attenuated in natural infections. HS interaction has been visualized at a conserved site in two serotypes suggesting a propensity for sulfated-sugar binding...
May 23, 2017: Nature Communications
https://www.readbyqxmd.com/read/28532079/nerve-growth-factor-loaded-heparinized-cationic-solid-lipid-nanoparticles-for-regulating-membrane-charge-of-induced-pluripotent-stem-cells-during-differentiation
#6
Yung-Chih Kuo, Rajendiran Rajesh
Nerve growth factor (NGF)-loaded heparinized cationic solid lipid nanoparticles (NGF-loaded HCSLNs) were developed using heparin-stearic acid conjugate, cacao butter, cholesterol, stearylamine (SA), and esterquat 1 (EQ 1). The effect of cationic lipids and lipid matrix composition on the particle size, particle structure, surface molecular composition, chemical structure, electrophoretic mobility, and zeta potential of HCSLNs was investigated. The effect of HCSLNs on the membrane charge of induced pluripotent stem cells (iPSCs) was also studied...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28530237/anti-platelet-factor-4-polyanion-antibodies-mediate-a-new-mechanism-of-autoimmunity
#7
Thi-Huong Nguyen, Nikolay Medvedev, Mihaela Delcea, Andreas Greinacher
Antibodies recognizing complexes of the chemokine platelet factor 4 (PF4/CXCL4) and polyanions (P) opsonize PF4-coated bacteria hereby mediating bacterial host defense. A subset of these antibodies may activate platelets after binding to PF4/heparin complexes, causing the prothrombotic adverse drug reaction heparin-induced thrombocytopenia (HIT). In autoimmune-HIT, anti-PF4/P-antibodies activate platelets in the absence of heparin. Here we show that antibodies with binding forces of approximately 60-100 pN activate platelets in the presence of polyanions, while a subset of antibodies from autoimmune-HIT patients with binding forces ≥100 pN binds to PF4 alone in the absence of polyanions...
May 22, 2017: Nature Communications
https://www.readbyqxmd.com/read/28529736/use-of-dabigatran-vs-warfarin-with-low-molecular-weight-heparin-bridging-in-catheter-ablation-for-atrial-fibrillation-patients-with-a-low-chads2-score
#8
Li Hao, Bing Rong, Fei Xie, Ming-Jie Lin, Jing-Quan Zhong
The purpose of the present study was to compare the efficacy and safety of dabigatran and interrupted warfarin with low-molecular-weight heparin bridging in non-valvular atrial fibrillation (AF) catheter ablation. Previously, there has been concerns that bridging therapy increases bleeding events without the benefit of stroke prevention. It has been suggested that bridging therapy should be considered only for patients at high-risk of thrombosis. Nevertheless, bridging therapy in AF patients with a low CHADS2 score may be safe and effective...
May 2017: Biomedical Reports
https://www.readbyqxmd.com/read/28529409/an-experimental-check-of-backscattering-interferometry
#9
Michael M Baksh, M G Finn
Backscattering interferometry (BSI) was used to determine the association constants for four well-known biomolecular interactions: protein A + IgG, trypsin + antitrypsin, trypsin + p-aminobenzamidine, and antithrombin + heparin. Each gave well-defined binding curves and Kd values in close agreement with published findings obtained using other techniques. These results stand in direct contrast to the claims in a 2015 publication in this journal (Discussion of "Back Scattering Interferometry revisited-a theoretical and experimental investigation" Jørgensen, T...
May 2017: Sensors and Actuators. B, Chemical
https://www.readbyqxmd.com/read/28529056/prevention-of-thromboembolic-complications-after-spine-surgery-by-the-use-of-low-molecular-weight-heparin
#10
Xiao-Jun Zeng, Hao Peng
AIM: The present study aimed to evaluate the effectiveness and safety of the use of LMWH in the prevention of thromboembolic complications after spine surgery. METHODS: We conducted a retrospective study on two groups of patients receiving spine surgery. A total of 947 patients admitted for surgery from July 2009 to June 2012 were administered therapeutic dose of LMWH daily after the surgery (therapeutic group). Another 814 patients enrolled from July 2006 to June 2009 were not given any heparin treatment (control group)...
May 18, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28527778/outcomes-in-patients-undergoing-primary%C3%A2-percutaneous-coronary-intervention-for-st-segment-elevation-myocardial-infarction-via-radial-access-anticoagulated-with-bivalirudin-versus%C3%A2-heparin-a-report-from-the-national-cardiovascular-data-registry
#11
Ion S Jovin, Rachit M Shah, Dhavalkumar B Patel, Sunil V Rao, Dmitri V Baklanov, Issam Moussa, Kevin F Kennedy, Eric A Secemsky, Robert W Yeh, Michael C Kontos, George W Vetrovec
OBJECTIVES: The aim of this study was to compare bivalirudin with heparin as anticoagulant agents in patients with ST-segment elevation myocardial infarction treated with radial primary percutaneous coronary intervention (PCI). BACKGROUND: Recent studies in which PCI was performed predominantly via radial access did not show bivalirudin to be superior to heparin. METHODS: Outcomes were compared in patients with STEMI included in the National Cardiovascular Data Registry CathPCI database from 2009 to 2015 who underwent primary PCI via radial access and who were anticoagulated with bivalirudin or heparin...
May 11, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28527185/surface-heparinization-and-blood-compatibility-modification-of-small-intestinal-submucosa-sis-for-small-caliber-vascular-regeneration
#12
Bensong Han, Feng Xue, Cunyi Fan, Xiumei Mo
OBJECTIVES: This study aims to investigate the small intestinal submucosal (SIS) surface after heparinization with the hypothermia plasma technique, to improve the blood compatibility of SIS, and to explore the possibility of construction of small-caliber vascular grafts with modified SIS scaffolds in vivo. METHODS: SIS films prepared from jejunums of pigs were processed for surface treatment at different time periods with the argon plasma initiation technique under vacuum, and were then immediately immersed in 4% (m/v) heparin sodium solution for 24-h heparinization...
2017: Bio-medical Materials and Engineering
https://www.readbyqxmd.com/read/28527174/cerebral-venous-sinus-thrombosis-and-posterior-reversible-encephalopathy-syndrome-coexisting-in-a-woman-a-rare-coincidence
#13
Surekha Dabla, Himanshu Juneja, Anubha Garg, Renu Bansal, Surender Kumar
Cerebral venous sinus thrombosis (CVST) and posterior reversible encephalopathy syndrome (PRES) are two rare diseases which may present with similar symptoms and signs. We report a case with coexisting PRES and CVST in a 34 years old postpartum female presented with multiple episodes of generalized seizures and bilateral vision loss after delivery. MRI brain and venography revealed left transverse sinus, sigmoid sinus and internal cerebral vein thrombosis with vasogenic edema in bilateral parieto-occipital, right temporal and left frontal area, which was suggestive of posterior reversible encephalopathy syndrome (PRES)...
April 2017: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/28526628/heparin-based-hydrogels-induce-human-renal-tubulogenesis-in-vitro
#14
Heather M Weber, Mikhail V Tsurkan, Valentina Magno, Uwe Freudenberg, Carsten Werner
Dialysis or kidney transplantation is the only therapeutic option for end stage renal disease. Accordingly, there is a large unmet clinical need for new causative therapeutic treatments. Obtaining robust models that mimic the complex nature of the human kidney is a critical step in the development of new therapeutic strategies. Here we establish a synthetic in vitro human renal tubulogenesis model based on a tunable glycosaminoglycan-hydrogel platform. In this system, renal tubulogenesis can be modulated by the adjustment of hydrogel mechanics and degradability, growth factor signaling, and the presence of insoluble adhesion cues, potentially providing new insights for regenerative therapy...
May 16, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28526159/anticoagulation-and-neuraxial-peripheral-anesthesia
#15
REVIEW
Mudit Kaushal, Ryan E Rubin, Alan D Kaye, Karina Gritsenko
Novel anticoagulants (NAGs) have emerged as the preferred alternatives to vitamin K antagonists. In patients being considered for regional anesthesia, these drugs present a layer of complexity in the preprocedure evaluation. There are no established tests to monitor anticoagulant activity and our experience is short with these drugs. These authors believe it is important to review the relevant hematology, orthopedics, and anesthesiology literature to provide a valuable reference for the clinician who is met with these challenges...
June 2017: Anesthesiology Clinics
https://www.readbyqxmd.com/read/28526142/anticoagulant-reversal-and-anesthetic-considerations
#16
REVIEW
Joseph Meltzer, Joseph R Guenzer
Bleeding complications are a common concern with the use of anticoagulant agents. In many situations, reversing of neutralizing their effects may be warranted. Prothrombin complex concentrate replaces coagulation factors lowered by warfarin, as does fresh frozen plasma, but in a more concentrated form. Protamine negates the effect of heparin and combines chemically with heparin molecules to form an inactive salt. It also partially reverses the effects of low-molecular-weight heparin. Recombinant activated factor VII is a nonspecific procoagulant that activates the extrinsic clotting pathway, resulting in thrombin generation, but does not directly neutralize the activity of any of the new oral anticoagulants...
June 2017: Anesthesiology Clinics
https://www.readbyqxmd.com/read/28525532/the-effects-of-indirect-and-direct-acting-anticoagulants-on-lupus-anticoagulant-assays-a-large-retrospective-study-at-a-coagulation-reference-laboratory
#17
Jansen N Seheult, Michael P Meyer, Franklin A Bontempo, Irina Chibisov
Objectives: To investigate the effects of indirect- and direct-acting anticoagulants on the interpretation of lupus anticoagulant (LAC) assays. Methods: A retrospective database review was performed to identify all LAC panels from November 2012 to November 2015. The positivity rates for three LAC tests were compared among various anticoagulant medications. Results: This analysis included 7,721 LAC panels. Direct oral anticoagulants, warfarin, and unfractionated heparin (UFH) were associated with higher LAC positivity rates compared with patients not receiving documented anticoagulation (83% for argatroban, 58% for dabigatran, 72% for rivaroxaban, 53% for apixaban, 56% for warfarin, and 36% for UFH vs 29% for no anticoagulation, P < ...
May 19, 2017: American Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28524547/performance-of-a-new-generation-continuous-autotransfusion-device-including-fat-removal-and-consequences-for-quality-controls
#18
T F Seyfried, M Gruber, D Bitzinger, M T Pawlik, A Breu, B M Graf, E Hansen
BACKGROUND AND OBJECTIVES: Cell salvage plays a key role in blood conservation. To maintain high performance, quality management is recommended. Accordingly, a new-generation autotransfusion device was tested for its performance and compared with its predecessor. Two different calculations of quality parameters were applied. MATERIALS AND METHODS: In an experimental study, the continuous autotransfusion devices CATSmart and Continuous Autotransfusion System (C.A...
May 19, 2017: Transfusion Medicine
https://www.readbyqxmd.com/read/28524005/rivaroxaban-metabolism-pharmacologic-properties-and-drug-interactions
#19
Tomas Kvasnicka, Ivana Malikova, Zuzana Zenahlikova, Karolína Kettnerova, Radka Brzezkova, Tomas Zima, Jan Ulrych, Jan Briza, Ivan Netuka, Jan Kvasnicka
BACKGROUND: Rivaroxaban represents a selective direct inhibitor of activated coagulation factor X (FXa) having peroral bioavailability and prompt onset of action. OBJECTIVE: The absorbtion of rivaroxaban is quick, reaching maximum plasma concentration 2-4 hours following its administration. Peroral bioavailability is high (80-100 %) and pharmacokinetic variability is considered to be moderate (coefficient of variation 30-40 %). This review discusses the properties, drug interactions, pharmacokinetics and clinical indications of rivaroxaban...
May 18, 2017: Current Drug Metabolism
https://www.readbyqxmd.com/read/28523161/the-safety-profile-of-preoperative-administration-of-heparin-for-thromboprophylaxis-in-chinese-patients-intended-for-thoracoscopic-major-thoracic-surgery-a-pilot-randomized-controlled-study
#20
Han-Yu Deng, Chang-Lin Shi, Gang Li, Jun Luo, Zhi-Qiang Wang, Yi-Dan Lin, Lun-Xu Liu, Qing-Hua Zhou
BACKGROUND: Patients undergoing major thoracic surgery especially for cancers are at a high risk of perioperative thromboembolism. Current guidelines recommended either heparin sodium (unfractionated heparin) or low-molecular-weight heparin (LMWH) for those patients at high risk of deep vein thrombosis (DVT). However, the rational timing of starting heparin has not yet been well established, because DVT can be caused by not only surgery but also comorbidities as well as prolonged hospital stay, and thoracic surgeons always concerned about heparin-related increased risk of intra- or post-operative bleeding...
April 2017: Journal of Thoracic Disease
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