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Clotting time

Andrea L Grant, Hayley L Letson, Jodie L Morris, Peter McEwen, Kaushik Hazratwala, Matthew Wilkinson, Geoffrey P Dobson
BACKGROUND: Tranexamic acid (TXA) is commonly used in orthopedic surgery to reduce excessive bleeding and transfusion requirements. Our aim was to examine if TXA was required in all osteoarthritis patients undergoing TKA surgery, and its possible effects on systemic inflammation and coagulation properties. METHODS: Twenty-three patients (Oxford Score 22-29) were recruited consecutively; 12 patients received TXA before (IV, 1.2 g/90 kg) and immediately after surgery (intra-articular, 1...
June 18, 2018: Journal of Orthopaedic Surgery and Research
Jia Liu, Dan Xu, Nian Xia, Kai Hou, Shijie Chen, Yu Wang, Yunman Li
Indobufen is a new generation of anti-platelet aggregation drug, but studies were not sufficient on its anticoagulant effects. In the present study, the anticoagulant activity of indobufen was determined by monitoring the activated partial thromboplastin time (APTT), prothrombin time (PT), and thrombin time (TT) in rabbit plasma. We evaluated the anticoagulant mechanisms on the content of the platelet factor 3,4 (PF3,4), and the coagulation factor 1, 2, 5, 8, 10 (FI, II, V, VIII, X) in rabbits, as well as the in vivo bleeding time and clotting time in mice...
June 15, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Matthew Cardinal, Constantino Kantaridis, Tong Zhu, Pengling Sun, Debra D Pittman, John E Murphy, Steven Arkin
BACKGROUND: Tissue factor pathway inhibitor (TFPI) is a protease inhibitor of tissue factor-activated coagulation factor VII (TF-FVIIa) complex and activated factor X (FXa). PF-06741086 is a monoclonal antibody that targets TFPI to increase clotting activity. OBJECTIVES: This study was a randomized, double-blind, sponsor-open, placebo-controlled, single intravenous (IV) or subcutaneous (SC) dose escalation study to evaluate the safety, tolerability, pharmacokinetics (PK), and pharmacodynamics (PD) of PF-06741086...
June 16, 2018: Journal of Thrombosis and Haemostasis: JTH
Gregory R Stettler, Ernest E Moore, Geoffrey R Nunns, Jim Chandler, Erik Peltz, Christopher C Silliman, Anirban Banerjee, Angela Sauaia
BACKGROUND: Goal-directed hemostatic resuscitation based on thrombelastography has a survival benefit compared to conventional coagulation assays. While thrombelastography transfusion thresholds for patients at risk for massive transfusion (MT) have been defined, similar cutoffs do not exist for the other commonly used viscoelastic assay, rotational thromboelastometry (ROTEM). The purpose of this study was to develop ROTEM blood product thresholds in patients at risk for MT. METHODS: ROTEM was assessed in trauma activation patients admitted from 2010 to 2016 (n = 222)...
August 2018: Journal of Surgical Research
J E Megías-Vericat, E Monte-Boquet, M Martín-Cerezuela, M J Cuéllar-Monreal, M V Tarazona-Casany, P Pérez-Huertas, S Bonanad, J L Poveda-Andrés
WHAT IS KNOWN AND OBJECTIVES: Most of the clotting factor (CF) dispensations to haemophiliac patients are centralized in a few haemophilia treatment centres, necessitating frequent visits and long travel distances. The aim was to evaluate the home delivery programme developed by the Outpatient Pharmaceutical Care Unit (OPCU) through the association of patients (ASHECOVA). METHODS: A specific software programme was designed to communicate the individual CF requirements...
June 15, 2018: Journal of Clinical Pharmacy and Therapeutics
Julia R Coleman, Ernest E Moore, Michael P Chapman, Anirban Banerjee, Christopher C Silliman, Arsen Ghasabyan, James Chandler, Jason M Samuels, Angela Sauaia
BACKGROUND: Several thrombelastography functional assays have been developed to guide transfusion in injured patients, but how this acceleration of thrombelastography affects its ability to predict massive transfusion is unknown. The objective of this study is to compare citrated native, citrated kaolin, and citrated rapid thromboelastographies for their prediction of massive transfusion after trauma. We hypothesized that citrated native thrombelastography best predicts massive transfusion...
June 11, 2018: Surgery
Leslie C Sharkey, Kim J Little, Kevin D Williams, Jeffrey M Todd, Rae Richardson, Angela D Gwynn, Aaron Rendahl
OBJECTIVE: To evaluate the technical performance of the turbidimetric ACL-TOP CTS 300 coagulation analyzer (IL) in dogs and cats and to create reference intervals for standard and novel parameters. DESIGN: Coagulation testing results from dogs and cats generated by the IL were prospectively compared with another mechanical clot detection system. Precision was documented and reference intervals were created for prothrombin time, activated partial thromboplastin time, and Clauss fibrinogen and D-dimer values, as well as for the quantitative clot curve parameters (high and low amplitude, delta, and first and second derivative curves)...
June 14, 2018: Journal of Veterinary Emergency and Critical Care
Eva Maria Greunz, Anne K H Krogh, Wouter Pieters, Olga Amann Ruiz, Julia Bohner, Anja Reckendorf, Davide Monaco, Mads Frost Bertelsen
  Acute-phase reactants indicate inflammation and are increasingly used in veterinary medicine to indicate and to monitor progression of disease. Hemostasis and inflammation have interconnected pathophysiologic pathways and influence each other on different levels. This study established observed normal ranges for acute-phase reactants and for coagulation and thromboelastographic (TEG) parameters in 49 dromedary camels ( Camelus dromedarius) and assessed the response to chronic and acute inflammation. Chronically infected animals suffering from lymph abscessation due to Corynebacterium spp...
June 2018: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
Massimo Morfini, Stefano Gherardini
The improvement of clotting factor concentrates (CFCs) has undergone an impressive boost during the last six years. Since 2010, several new recombinant factor (rF)VIII/IX concentrates entered phase I/II/III clinical trials. The improvements are related to the culture of human embryonic kidney (HEK) cells, post-translational glycosylation, PEGylation, and co-expression of the fragment crystallizable (Fc) region of immunoglobulin (Ig)G1 or albumin genes in the manufacturing procedures. The extended half-life (EHL) CFCs allow an increase of the interval between bolus administrations during prophylaxis, a very important advantage for patients with difficulties in venous access...
June 2018: Therapeutic Advances in Hematology
Matthew Lindeblad, Alexander Lyubimov, Richard van Breemen, Kamil Gierszal, Guy Weinberg, Israel Rubinstein, Douglas L Feinstein
Patients exposed to long acting anticoagulant rodenticides (LAARs) are typically administered large amounts of oral vitamin K1 (VK1) to counteract life-threatening anti-coagulant effects. While VK1 treatment effectively prevents mortality, additional methods are needed to reduce the long duration of VK1 treatment which can last for months at high expense. We developed a model of brodifacoum (BDF) poisoning, one of the most potent LAARs, in adult male New Zealand White (NZW) rabbits. The LD50 for oral BDF was determined to be 192 μg/kg, similar to that calculated for adult rats...
June 12, 2018: Toxicological Sciences: An Official Journal of the Society of Toxicology
Jean-Guillaume Dillinger, Gregory Ducrocq, Yedid Elbez, Marc Cohen, Christoph Bode, Charles Pollack, José C Nicolau, Patrick Henry, Sasko Kedev, Stephen D Wiviott, Marc S Sabatine, Shamir R Mehta, Philippe Gabriel Steg
BACKGROUND: Monitoring anticoagulation with activated clotting time (ACT) has been proposed to reduce ischemic or bleeding events. However, the value of using ACT to improve outcomes is uncertain. This study sought to determine the relationship between ACT and outcomes during percutaneous coronary intervention in patients with non-ST-segment-elevation acute coronary syndrome (NSTE-ACS) treated by unfractionated heparin with GPIs (glycoprotein IIb/IIIa inhibitors). METHODS AND RESULTS: From the randomized TAO trial (Treatment of Acute Coronary Syndromes With Otamixaban), we analyzed the value of ACT to predict ischemic and bleeding outcomes in the 3275 patients receiving unfractionated heparin plus eptifibatide...
June 2018: Circulation. Cardiovascular Interventions
Anusha Rajagopalan, Bindhu Omana Sukumaran
Wrightia tinctoria stem proteases were partially purified for the first time through a non-chromatographic technique, three phase partitioning (TPP), to concentrate the milk clotting proteases. Various parameters like salt and solvent concentration that affect the partitioning of the protease were examined. Maximum recovery and purification fold of the protease activity were found in the interfacial phase (IP) with 60% ammonium sulphate and 1:1 crude enzyme to t-butanol. Optimum pH and temperature of the enzyme fraction were found to be 7...
June 9, 2018: International Journal of Biological Macromolecules
Denise S Tevis, Jeffery M Jarrett, Deanna R Jones, Po-Yung Cheng, Melanie Franklin, Neva Mullinex, Kathleen L Caldwell, Robert L Jones
BACKGROUND: Comprehensive information on the effect of time and temperature storage on the measurement of elements in human, whole blood (WB) by inductively coupled plasma-dynamic reaction cell-mass spectrometry (ICP-DRC-MS) is lacking, particularly for Mn and Se. METHODS: Human WB was spiked at 3 concentration levels, dispensed, and then stored at 5 different temperatures: -70 °C, -20 °C, 4 °C, 23 °C, and 37 °C. At 3 and 5 weeks, and at 2, 4, 6, 8, 10, 12, 36 months, samples were analyzed for Pb, Cd, Mn, Se and total Hg, using ICP-DRC-MS...
June 9, 2018: Clinica Chimica Acta; International Journal of Clinical Chemistry
Roseita Carroll, Josephine Mansell, Sean Platton, Laura Green, P K MacCallum
No abstract text is available yet for this article.
June 8, 2018: Anesthesia and Analgesia
Anne Sofie Gram, Martin Bæk Petersen, Jonas Salling Quist, Mads Rosenkilde, Bente Stallknecht, Else-Marie Bladbjerg
Obesity and exercise constitute important factors for cardiovascular disease risk, but the long-term effects of different exercise modalities on haemostatic biomarkers are not well elucidated. We investigated the effects of 6 months of active commuting or leisure-time exercise on measures of fibrin turnover in individuals who are overweight and obese. Ninety younger (20-40 years), sedentary, healthy women and men who are overweight and obese (BMI: 25-35 kg/m2 ) were randomised to 6 months of habitual lifestyle (CON, n =16), active commuting (BIKE, n =19), or leisure-time exercise of moderate (MOD, ∼50% VO2 peak reserve, n =31) or vigorous intensity (VIG, ∼70% VO2 peak reserve, n =24)...
2018: Journal of Obesity
J A Barea-Mendoza, L J Terceros-Almanza, C García-Fuentes, S Bermejo-Aznárez, I J Prieto Del Portillo, C Mudarra-Reche, M Valiente-Fernández, A Rodríguez-Biendicho, J C Montejo González, M Chico-Fernández
BACKGROUND: Hypoperfusion plays a central role in shock states, and has been proposed as a coagulopathy trigger. The study of the rotational thromboelastometry (ROTEM) profile during cardiac arrest could offer new insights to the role of hypoperfusion in coagulation during shock states. OUTCOME: To describe the ROTEM profile in a cohort of asystole donors and elucidate the incidence of hyperfibrinolysis. DESIGN: A prospective observational study was carried out in 18 patients consecutively admitted to the ICU after out-of-hospital non-recovered cardiac arrest (CA)...
June 7, 2018: Medicina Intensiva
Susanne Bürki, Béatrice Brand, Robert Escher, Walter A Wuillemin, Michael Nagler
OBJECTIVES: To investigate the accuracy, reproducibility and costs of different laboratory assays for the monitoring of unfractionated heparin (UFH) in clinical practice and to study test utilisation in Switzerland. DESIGN: Prospective evaluation study and survey among Swiss hospitals and laboratories. SETTING: Secondary care hospital in rural Switzerland (evaluation study); all Swiss hospitals and laboratories (survey). PARTICIPANTS: All consecutive patients, monitored for treatment with UFH during two time periods, were included (May to July 2014 and January to February 2015; n=254)...
June 9, 2018: BMJ Open
Huiying Liu, Jun Pan, Ye Yang, Xiuming Cui, Yuan Qu
A green solvent extraction technology involving a microwave processing method was used to increase the content of minor ginsenosides from Panax notoginseng . This article aims to investigate the optimization of preparation of the minor ginsenosides by this microwave processing method using single-factor experiments and response surface methodology (RSM), and discuss the blood-enriching activity and hemostatic activity of the extract of microwave processed P. notoginseng (EMPN) The RSM for production of the minor ginsenosides was based on a three-factor and three-level Box-Behnken design...
May 23, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Elisabeth Brodin, Emina Hadzibajramovic, Fariba Baghaei, Katharina Stibrandt Sunnerhagen, Åsa Lundgren-Nilsson
OBJECTIVES: To describe self-reported activity using the Haemophilia Activity List (HAL) for Swedish adults with haemophilia and to detect any changes over time. METHOD: The HAL was sent to the adult population with haemophilia A and B, moderate and severe form, living in Sweden (n = 260). Participants completed the HAL and a questionnaire on sociodemographic and medical information. From a previous study cohort, 61 persons had responded twice to the HAL. The investigated group was divided into early and later treatment onset groups with regard to access to medication...
June 8, 2018: Journal of Rehabilitation Medicine
Matthew W Kelecy, Travis Shutt, Jack Rostas, Robert C G Martin
BACKGROUND AND OBJECTIVES: Enoxaparin inactivates factor Xa via a complex formed after binding to circulating anti-thrombin III. This mechanism is reported not to alter hemostatic measures such as clotting time, PT, or PTT. To date, no clinical trials have shown a causal relationship between the clinical/pharmacological effects of enoxaparin on international normalized ratio (INR). The aim of our study is to show the clinical effect of enoxaparin on INR. METHODS: Patients (N = 350) were reviewed from our prospective IRB approved databases undergoing gastroesophageal or hepatobiliary surgeries...
June 7, 2018: Journal of Surgical Oncology
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