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Thrombin Hemostatic

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101. Hemorrhagic, Hemostatic, and Thromboelastometric Disorders in 35 Dogs with a Clinical Diagnosis of Leptospirosis: A Prospective Study Full Text available with Trip Pro

single cohort study was conducted. Results from the CBC, coagulation tests (prothrombin, activated partial thromboplastin and thrombin times, fibrinogen, fibrin(ogen) degradation products, and D-dimer concentrations), rotational thromboelastometry (TEM), signalment, hemorrhagic diatheses, occurrence of disseminated intravascular coagulation (DIC) at admission, and survival to discharge were recorded.The most common hematologic and hemostatic abnormalities were anemia (30/35), thrombocytopenia (21/35 (...) Hemorrhagic, Hemostatic, and Thromboelastometric Disorders in 35 Dogs with a Clinical Diagnosis of Leptospirosis: A Prospective Study Leptospirosis in dogs is occasionally associated with a hemorrhagic syndrome, the pathophysiology of which is not fully understood.To characterize hematologic, hemostatic, and thromboelastometric abnormalities in dogs with leptospirosis and to study their association with hemorrhagic diatheses and outcomes.Thirty-five client-owned dogs.A prospective observational

2016 Journal of Veterinary Internal Medicine

102. Characterization of Hemostatic Disordres in Septic Shock: Searching for Biological Markers

not possible to determine the hemostatic status of a given patient. This instability of hemostatic system is not revealed by classical tests. Thus, a better characterization of hemostatic status could certainly improve patient care. This study aims at characterizing disorders of coagulation and fibrinolysis using "global" tests such as thrombin generation test or coagulolytic test. Furthermore, the association with biological markers of interest (such as microparticles, neutrophil elastase or histones (...) Characterization of Hemostatic Disordres in Septic Shock: Searching for Biological Markers Characterization of Hemostatic Disordres in Septic Shock: Searching for Biological Markers - Full Text View - ClinicalTrials.gov Hide glossary Glossary Study record managers: refer to the if submitting registration or results information. Search for terms x × Study Record Detail Saved Studies Save this study Warning You have reached the maximum number of saved studies (100). Please remove one or more

2016 Clinical Trials

103. Hierarchical organization of the hemostatic response to penetrating injuries in the mouse macrovasculature. Full Text available with Trip Pro

Hierarchical organization of the hemostatic response to penetrating injuries in the mouse macrovasculature. Essentials Methods were developed to image the hemostatic response in mouse femoral arteries in real time. Penetrating injuries produced thrombi consisting primarily of platelets. Similar to arterioles, a core-shell architecture of platelet activation occurs in the femoral artery. Differences from arterioles included slower platelet activation and reduced thrombin dependence.Background (...) platelet ADP P2Y12 receptors destabilized the shell and reduced thrombus size without affecting the core. Inhibiting thrombin with hirudin suppressed fibrin accumulation, but had little impact on thrombus size. Removing the platelet collagen receptor, glycoprotein VI, had no effect. Conclusions These results (i) demonstrate the feasibility of performing high-speed fluorescence imaging in larger vessels and (ii) highlight differences as well as similarities in the hemostatic response in the macro

2016 Journal of Thrombosis and Haemostasis

104. The hemostatic disturbance in patients with acute aortic dissection: A prospective observational study. Full Text available with Trip Pro

The hemostatic disturbance in patients with acute aortic dissection: A prospective observational study. Coagulopathy is still a frequent complication in the surgical treatment of acute aortic dissection. However, the physiopathology of surgically induced coagulopathy has never been systematically and comprehensively studied in patients with acute aortic dissection. The aim of the present study was to describe the perioperative hemostatic system in patients with acute aortic dissection.The 87 (...) patients who underwent aortic arch surgery for acute Stanford type A aortic dissection from January 2013 to September 2015 were enrolled in this study. The perioperative biomarkers of hemostatic system were evaluated using standard laboratory tests and enzyme-linked immunosorbent assays (ELISAs) at 5 time points: anesthesia induction (T1), lowest nasopharyngeal temperature (T2), protamine reversal (T3), 4 hours after surgery (T4), and 24 hours after surgery (T5).The ELISAs biomarkers revealed

2016 Medicine

105. Hemostatic properties and protein expression profile of therapeutic apheresis plasma treated with amotosalen and ultraviolet A for pathogen inactivation. (Abstract)

Hemostatic properties and protein expression profile of therapeutic apheresis plasma treated with amotosalen and ultraviolet A for pathogen inactivation. The INTERCEPT Blood System (IBS) using amotosalen-HCl and ultraviolet (UV)A inactivates a large spectrum of microbial pathogens and white blood cells in therapeutic plasma. Our aim was to evaluate to what extent IBS modifies the capacity of plasma to generate thrombin and induces qualitative or quantitative modifications of plasma (...) proteins.Plasma units from four donors were collected by apheresis. Samples were taken before (control [CTRL]) and after IBS treatment and stored at -80°C until use. The activities of plasma coagulation factors and inhibitors and the thrombin generation potential were determined using assays measuring clotting times and the calibrated automated thrombogram (CAT), respectively. The proteomic profile of plasma proteins was examined using a two-dimensional differential in-gel electrophoresis (2D-DIGE

2016 Transfusion

106. Comprehensive Assessment of the Hemostatic System in Polycystic Ovarian Syndrome. (Abstract)

Comprehensive Assessment of the Hemostatic System in Polycystic Ovarian Syndrome. Polycystic ovarian syndrome (PCOS) affects 12 to 19% of women and has reproductive and metabolic features (endothelial dysfunction, increased diabetes, and cardiovascular risk factors). It also appears to have altered coagulation and fibrinolysis with a prothrombotic state with epidemiological evidence of increased venous thromboembolism. We aimed to comprehensively assess hemostasis in women with PCOS versus (...) control women. In an established case-control cohort of lean, overweight, and obese women with (n = 107) and without PCOS (n = 67), with existing measures of plasminogen activator inhibitor 1 (PAI-1), asymmetric dimethylarginine (ADMA), hormonal, and metabolic markers, we also assessed prothrombin fragments 1 and 2 (PF1 & 2), plasminogen, tissue plasminogen activator (tPA), and thrombin generation (TG). Higher levels of ADMA (0.70 vs. 0.39 µmol/L, p < 0.01), PAI-1 (4.80 vs. 3.66 U/mL, p < 0.01

2015 Seminars In Thrombosis And Hemostasis

107. Hemostatic Changes During Extracorporeal Membrane Oxygenation: A Prospective Randomized Clinical Trial Comparing Three Different Extracorporeal Membrane Oxygenation Systems. (Abstract)

Hemostatic Changes During Extracorporeal Membrane Oxygenation: A Prospective Randomized Clinical Trial Comparing Three Different Extracorporeal Membrane Oxygenation Systems. Extracorporeal membrane oxygenation is a rescue therapy for patients with severe lung failure. Major complications caused by extracorporeal membrane oxygenation are bleeding, thrombosis, and hemolysis. The aim of this study was to compare the impact of different extracorporeal membrane oxygenation systems on blood (...) 220.5 G/L before extracorporeal membrane oxygenation therapy to a minimum of 133 G/L by the last day of extracorporeal membrane oxygenation support. During the first 5 days of extracorporeal membrane oxygenation therapy, prothrombin fragment 1.2 (F1.2) (1.36-2.4 µM), thrombin-antithrombin complex (14.5-50 µg/L), and D-dimers (6.00-27.0 mg/L) increased, whereas fibrinogen values dropped from 5.8 to 4.1 g/L. The three different extracorporeal membrane oxygenation systems did not show any differences

2015 Critical Care Medicine Controlled trial quality: uncertain

108. Comparison of hemostatic dressings for superficial wounds using a new spectrophotometric coagulation assay Full Text available with Trip Pro

Comparison of hemostatic dressings for superficial wounds using a new spectrophotometric coagulation assay Due to demographical changes the number of elderly patients depending on oral anticoagulation is expected to rise. Prolonged bleeding times in case of traumatic injuries represent the drawback of these medications, not only in major trauma, but also in superficial wounds. Therefore, dressings capable of accelerating coagulation onset and shortening bleeding times are desirable (...) for these patients.The hemostatic potential and physical properties of different types of superficial wound dressings (standard wound pad, two alginates, chitosan, collagen (Lyostypt(®)), oxidized cellulose, and QuikClot(®)) were assessed in vitro. For this purpose the clotting times of blood under the influence of the named hemostatics from healthy volunteers were compared with Marcumar(®) or ASS(®) treated patients. For that, a newly developed coagulation assay based on spectrophotometric extinction measurements

2015 Journal of translational medicine

109. Evaluation of the Hemostatic Potential in Sickle Cell Disease Patients

as a hypercoagulable state. However, the approach used so far to the measure of clotting in sickle cell disease was segmented in the sense that the various components of the hemostatic balance were studied separately.The thrombin generation test is a functional test which explores the coagulation globally, integrating both pro players that anticoagulants actors in the system. The investigators already used this test to demonstrate that the hemostatic potential was high in a cohort of affected children compared (...) of clotting in sickle cell disease was segmented in the sense that the various components of the hemostatic balance were studied separately. This scale is complex, this approach difficult to give a comprehensive and integrated picture of the various disturbances in the system. The thrombin generation test is a functional test which explores the coagulation globally, integrating both pro players that anticoagulants actors in the system. The investigators have used this test to demonstrate

2015 Clinical Trials

110. Control of bleeding in surgical procedures: critical appraisal of HEMOPATCH (Sealing Hemostat) Full Text available with Trip Pro

Control of bleeding in surgical procedures: critical appraisal of HEMOPATCH (Sealing Hemostat) The need for advanced hemostatic agents increases with the complexity of surgical procedures and use of anticoagulation and antiplatelet treatments. HEMOPATCH (Sealing Hemostat) is a novel, advanced hemostatic pad that is composed of a synthetic, protein-reactive monomer and a collagen backing. The active side is covered with a protein-reactive monomer: N-hydroxysuccinimide functionalized polyethylene (...) glycol (NHS-PEG). NHS-PEG rapidly affixes the collagen pad to tissue to promote and maintain hemostasis. The combined action of the NHS-PEG and collagen is demonstrated to have benefit relative to other hemostatic agents in surgery and preclinical surgical models. This paper reviews the published investigations and case reports of the hemostatic efficacy of HEMOPATCH, wherein HEMOPATCH is demonstrated to be an effective, easy-to-use hemostatic agent in open and minimally invasive surgery of patients

2015 Medical devices (Auckland, N.Z.)

111. The effect of compression socks worn during a marathon on hemostatic balance. (Abstract)

individuals. We investigated the effect of compression socks on exercise-induced hemostatic activation and balance in endurance athletes running the 2013 Hartford Marathon.Adults (n = 20) were divided into compression sock (SOCK; n = 10) and control (CONTROL; n = 10) groups. Age, anthropometrics, vital signs, training mileage and finishing time were collected. Venous blood samples were collected 1 day before, immediately after and 1 day following the marathon for analysis of coagulatory (i.e. thrombin (...) The effect of compression socks worn during a marathon on hemostatic balance. Marathon running evokes parallel increases in markers of coagulation and fibrinolysis (i.e. hemostatic activation) immediately following strenuous, endurance exercise such that hemostatic balance is maintained. However, other factors incident to marathon running (i.e. dehydration, travel) may disproportionately activate the coagulatory system, increasing blood clot risk after an endurance event in otherwise healthy

2015 The Physician and sportsmedicine Controlled trial quality: uncertain

112. Fibrin, γ'-Fibrinogen, and Transclot Pressure Gradient Control Hemostatic Clot Growth During Human Blood Flow Over a Collagen/Tissue Factor Wound. Full Text available with Trip Pro

factors responsible for regulating thrombin-mediated clot growth.Using factor XIIa-inhibited human whole blood perfused in a microfluidic device over collagen/tissue factor at controlled wall shear rate and ΔP, we found thrombin to be highly localized in the P-selectin(+) core of hemostatic clots. Increasing ΔP from 9 to 29 mm Hg (wall shear rate=400 s(-1)) reduced P-selectin(+) core size and total clot size because of enhanced extravasation of thrombin. Blockade of fibrin polymerization with 5 mmol/L (...) Fibrin, γ'-Fibrinogen, and Transclot Pressure Gradient Control Hemostatic Clot Growth During Human Blood Flow Over a Collagen/Tissue Factor Wound. Biological and physical factors interact to modulate blood response in a wounded vessel, resulting in a hemostatic clot or an occlusive thrombus. Flow and pressure differential (ΔP) across the wound from the lumen to the extravascular compartment may impact hemostasis and the observed core/shell architecture. We examined physical and biological

2015 Thrombosis and Vascular Biology

113. Dehydration of blood platelets by zeodration: in vitro characterization and hemostatic properties in vivo. (Abstract)

Dehydration of blood platelets by zeodration: in vitro characterization and hemostatic properties in vivo. Platelets (PLTs) are currently stored at room temperature (RT) for 5 to 7 days. So far, there exists no validated method for the preparation and long-term storage of dehydrated PLTs suitable for transfusion after rehydration. In this study, a desiccation process, zeodration, was applied to PLTs.A complete procedure of dehydration at RT by zeodration was employed. Zeodrated human and mouse (...) PLTs were characterized in vitro. Zeodrated mouse PLTs were transfused into clopidogrel-treated mice to evaluate their hemostatic properties.The optimal conditions for dehydration of PLTs at RT in a laboratory scale zeodrator were defined as 145 mbar and 20.2 ± 1.5 °C. The recovery rate was 85 ± 2% and the dryness of zeodrated PLTs (Z_PLTs) indicated that they were sufficiently stable for long-term storage. Rehydrated Z_PLTs were round, were not aggregated, and expressed the glycoproteins required

2015 Transfusion

114. Multimodal assessment of non-specific hemostatic agents for apixaban reversal. (Abstract)

Multimodal assessment of non-specific hemostatic agents for apixaban reversal. Non-specific hemostatic agents, namely activated prothrombin complex concentrate (aPCC), PCC and recombinant activated factor (F) VII (rFVIIa), can be used, off-label, to reverse the effects of FXa inhibitors in the rare cases of severe hemorrhages, as no approved specific antidote is available. We have evaluated the ability of aPCC, PCC and rFVIIa to reverse apixaban.Healthy volunteer whole blood was spiked (...) with therapeutic or supra-therapeutic apixaban concentrations and two doses of aPCC, PCC or rFVIIa. Tests performed included a turbidimetry assay for fibrin polymerization kinetics analysis, scanning electron microscopy for fibrin network structure observation, thrombin generation assay (TGA), thromboelastometry, prothrombin time and activated partial thromboplastin time.aPCC generated a dense clot constituting thin and branched fibers similar to those of a control without apixaban, increased fibrin

2015 Journal of Thrombosis and Haemostasis

115. Fresh frozen plasma transfusion fails to influence the hemostatic balance in critically ill patients with a coagulopathy. (Abstract)

Fresh frozen plasma transfusion fails to influence the hemostatic balance in critically ill patients with a coagulopathy. Coagulopathy has a high prevalence in critically ill patients. An increased International Normalized Ratio (INR) is a common trigger to transfuse fresh frozen plasma (FFP), even in the absence of bleeding. Therefore, FFP is frequently administered to these patients. However, the efficacy of FFP in correcting hemostatic disorders in non-bleeding recipients has been (...) questioned.To assess whether INR prolongation parallels changes in the results of other tests investigating hemostasis, and to evaluate the coagulant effects of a fixed dose of FFP in non-bleeding critically ill patients with a coagulopathy.Markers of coagulation, individual factor levels and levels of natural anticoagulants were measured. Also, thrombin generation and thromboelastometry (ROTEM) assays were performed before and after FFP transfusion (12 mL kg(-1) ) to 38 non-bleeding critically ill patients

2015 Journal of Thrombosis and Haemostasis Controlled trial quality: uncertain

116. Early Hemostatic Responses to Trauma: Identified Using Hierarchical Clustering Analysis. Full Text available with Trip Pro

increased in cluster 3. Trauma clusters were most noticeably different in their relative fibrinogen concentration, peak thrombin generation, and platelet-induced clot contraction.Hierarchical clustering analysis identified three distinct hemostatic responses to trauma. Further insights into the underlying hemostatic mechanisms responsible for these responses are needed.© 2015 International Society on Thrombosis and Haemostasis. (...) Early Hemostatic Responses to Trauma: Identified Using Hierarchical Clustering Analysis. Trauma-induced coagulopathy is a complex multifactorial hemostatic response that is poorly understood.To identify distinct hemostatic responses to trauma and identify key components of the hemostatic system that vary between responses.A cross-sectional observational study of adult trauma patients at an urban level I trauma center emergency department was performed. Hierarchical clustering analysis was used

2015 Journal of Thrombosis and Haemostasis

117. Platelets and platelet-derived factor Va confer hemostatic competence in complete factor V deficiency. Full Text available with Trip Pro

Platelets and platelet-derived factor Va confer hemostatic competence in complete factor V deficiency. Whole genome sequencing of an individual completely devoid of plasma- and platelet-derived factor V (FV) identified 167 variants in his F5 gene including previously identified and damaging missense mutations at rs6027 and Leu90Ser. Because the administration of fresh frozen plasma (FFP) prevents gastrointestinal bleeding in this individual, its effects on his plasma- and platelet-derived FV (...) concentrations were assessed. The patient's plasma FV levels peaked by 2 hours following FFP administration and were undetectable 96 hours later. In contrast, increased platelet-derived FV/Va concentrations were observed within 6 hours, peaked at 24 hours, decreased slowly over 7 days, and originated from megakaryocyte endocytosis and intracellular processing of plasma FV. Ten days after transfusion, no thrombin was generated in a tissue factor-initiated whole blood clotting assay unless exogenous FV

2015 Blood

118. Hemostatic agents of broad applicability produced by selective tuning of factor Xa zymogenicity. Full Text available with Trip Pro

Hemostatic agents of broad applicability produced by selective tuning of factor Xa zymogenicity. There is a clinical need to develop safe therapeutic strategies to mitigate bleeding. Previously, we found that a novel zymogen-like factor Xa variant (FXa-I16L) was effective in correcting the coagulation defect in hemophilic mice. Here we expand the mutational framework to tune the FX(a) zymogen-like state. Alteration of FXa zymogenicity yields variants (V17M, I16L, I16M, V17T, V17S, and I16T (...) ) with a wide range (≤1000-fold) of reduced function toward physiologic substrates and inhibitors. The extent of zymogen-like character, including resistance to antithrombin III, correlates well with plasma half-life (<2 minutes to >4 hours). Importantly, biologic function, including that of the most zymogen-like variant (FXa-I16T), was greatly enhanced when bound to FVa membranes. This resulted in improvement of clotting times and thrombin generation in hemophilic plasma. The FXa variants were remarkably

2015 Blood

119. Android fat distribution affects some hemostatic parameters in women with polycystic ovary syndrome compared with healthy control subjects matched for age and body mass index. (Abstract)

the thrombin generation curve (TAUC).In the PCOS group, BMI and WC correlated positively with TAFI, D-dimer, PAI-1, Cmax, and TAUC; HC with D-dimer and PAI-1; WHR with TAFI, D-dimer, and PAI-1; glucose with TAFI; insulin and homeostasis-model assessment of insulin resistance with PAI-1; and FT with Cmax and TAUC. Age correlated positively with D-dimer and PAI-1, and negatively with Tlag and Tmax. In the control group, there were no correlations between clinical markers of fat distribution and hemostatic (...) Android fat distribution affects some hemostatic parameters in women with polycystic ovary syndrome compared with healthy control subjects matched for age and body mass index. To correlate hemostatic parameters with clinical markers of fat distribution and laboratory variables in women with polycystic ovary syndrome (PCOS) compared with healthy control subjects.Cross-sectional study.Tertiary teaching hospital.Forty-five women with PCOS and 45 control women matched for age and body mass index

2015 Fertility and Sterility

120. Hemostasis During Urologic Surgery: Fibrin Sealant Compared With Absorbable Hemostat Full Text available with Trip Pro

Hemostasis During Urologic Surgery: Fibrin Sealant Compared With Absorbable Hemostat In the United States, fibrin sealants have been used to achieve hemostasis for nearly two decades. Although their clinical utility was first demonstrated in cardiac surgery, their effectiveness and safety have since been demonstrated to extend to a wide array of procedures. Fibrin sealants typically contain two components-fibrinogen and thrombin-that are combined and delivered simultaneously to a target (...) bleeding site in order to achieve hemostasis. However, many commercial formulations contain other additional components, such as antifibrinolytic agents, that have been associated with adverse outcomes. This subanalysis compares the safety and effectiveness of a fibrin sealant versus an absorbable hemostat for achieving hemostasis during urologic procedures with mild to moderate bleeding.

2015 Reviews in urology

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