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Rotational Thromboelastometry

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https://www.readbyqxmd.com/read/27892652/aliphatic-polyethers-with-sulfate-carboxylate-and-hydroxyl-side-groups-do-they-show-anticoagulant-properties
#1
Jagadeesh Malineni, Smriti Singh, Sabine Tillmann, Helmut Keul, Martin Möller
There is increasing interest in the synthesis of low molecular weight heparin and heparan sulfate mimetic polymers because of their various potential biomedical applications. The functional activity of heparin and heparan sulfate is believed to arise from the presence of a number of functional groups, such as hydroxyl, carboxylate and sulfate groups. The design and synthesis of novel heparin-mimetic polymers with a particular functionality poses a formidable challenge and requires carefully control of the selective conversion of functional groups on the polymer chain...
November 28, 2016: Macromolecular Bioscience
https://www.readbyqxmd.com/read/27891624/quarantine-versus-pathogen-reduced-plasma-coagulation-factor-content-and-rotational-thromboelastometry-coagulation
#2
Oliver M Theusinger, David Goslings, Jan-Dirk Studt, Brigitte Brand-Staufer, Burkhardt Seifert, Donat R Spahn, Beat M Frey
BACKGROUND: Different types of fresh-frozen plasma (FFP) exist, and the concentrations of plasma proteins vary between individuals and blood groups. Furthermore, processing may also influence the content. Quarantine-stored plasma (qFFP) and plasma that was pathogen-reduced using blood-safety (Intercept) technology (piFFP) were analyzed regarding procoagulant and anticoagulant hemostasis proteins, including endogenous thrombin (thrombin-generation) potential (ETP). MATERIALS AND METHODS: Thirty-five samples of each type of FFP were analyzed using only male Blood Group O donors...
November 27, 2016: Transfusion
https://www.readbyqxmd.com/read/27889194/usefulness-of-thromboelastography-in-the-detection-and-management-of-tissue-plasminogen-activator-associated-hyperfibrinolysis
#3
Francesca Rosafio, Laura Vandelli, Guido Bigliardi, Francesco Cavallieri, Maria Luisa Dell'Acqua, Livio Picchetto, Andrea Zini
Rotation thromboelastometry is a viscoelastometric method that provides a rapid assessment of a patient's hemostatic processes in emergency settings, allowing prompt identification of specific coagulation abnormalities. Its results thus might guide targeted replacement therapy in hemorrhagic conditions, in case of platelet or coagulation factor deficiency, or hyperfibrinolysis, which is difficult to identify otherwise. Although currently used in emergency and traumatic surgery, there are limited data about thromboelastometry in ischemic stroke, particularly in monitoring the coagulative response to recombinant tissue plasminogen activator after intravenous thrombolysis (IVT)...
November 23, 2016: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/27882572/a-paired-comparison-of-thawed-and-liquid-plasma
#4
Lucy Backholer, Laura Green, Sian Huish, Sean Platton, Michael Wiltshire, Heidi Doughty, Elinor Curnow, Rebecca Cardigan
BACKGROUND: To make plasma readily available to treat major hemorrhage, some centers are internationally using either thawed plasma (TP) or "never-frozen" liquid plasma (LP). Despite the routine use of both, there are limited data comparing the two. The hemostatic properties of LP were evaluated and compared to TP in a paired study. STUDY DESIGN AND METHODS: Two ABO-matched plasma units were pooled and split to produce 1 unit for LP and 1 unit for TP. Samples of TP and LP, stored at 2 to 6°C, were tested for a range of coagulation factors, thrombin generation, and rotational thromboelastometry...
November 23, 2016: Transfusion
https://www.readbyqxmd.com/read/27862691/evaluation-of-the-use-of-global-haemostasis-assays-to-monitor-treatment-in-factor-xi-deficiency
#5
G N Pike, A M Cumming, J Thachil, C R M Hay, J Burthem, P H B Bolton-Maggs
INTRODUCTION: Previous guidelines recommend that FXI:C levels should be used to monitor FXI replacement in factor XI (FXI) deficiency. However, FXI:C levels do not correlate with bleeding tendency in this disorder and may not be the optimal test by which to monitor and determine further treatment in the postoperative period. AIM: To assess whether the thrombin generation assay (TGA) and rotational thromboelastometry can be used to monitor FXI replacement peri-operatively in FXI deficiency and to determine if changes in FXI:C levels correlate with changes in thrombin generation and clot formation parameters following treatment with solvent-detergent fresh frozen plasma (SD-FFP)...
November 8, 2016: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/27849854/212-ecmo-and-cardiac-assist-devices-rotational-thromboelastometry-guided-coagulation-monitoring
#6
Dorothea Rosenberger, Heather Henry
No abstract text is available yet for this article.
December 2016: Critical Care Medicine
https://www.readbyqxmd.com/read/27815579/extracorporeal-membrane-oxygenation-improves-coagulopathy-in-an-experimental-traumatic-hemorrhagic-model
#7
M Larsson, P Forsman, P Hedenqvist, A Östlund, J Hultman, A Wikman, L Riddez, B Frenckner, M Bottai, C-M Wahlgren
PURPOSE: Hemorrhage is the most common cause of preventable death after trauma. Coagulopathy plays a central role in uncontrolled bleeding and is caused by multiple factors. Extracorporeal Membrane Oxygenation (ECMO) is an established treatment for patients with respiratory failure and has in recent years also been used in severely injured trauma patients with cardiopulmonary failure and coexisting bleeding shock. The aim of this study was to evaluate the effect of ECMO on hypothermia, acidosis, and coagulopathy in a traumatic hemorrhagic rabbit model...
November 4, 2016: European Journal of Trauma and Emergency Surgery: Official Publication of the European Trauma Society
https://www.readbyqxmd.com/read/27785858/a-prospective-diagnostic-accuracy-study-evaluating-rotational-thromboelastometry-and-thromboelastography-in-100-patients-with-von-willebrand-disease
#8
D E Schmidt, A Majeed, M Bruzelius, J Odeberg, M Holmström, A Ågren
INTRODUCTION: Rotational thromboelastometry (ROTEM(®) ) and thromboelastography (TEG(®) ) are increasingly used in the perioperative and emergency assessment of bleeding tendencies. The diagnostic value of ROTEM and TEG for von Willebrand disease (VWD) remains to be established. AIM: To investigate whether ROTEM and TEG can discriminate patients with VWD from healthy controls. METHODS: Rotational thromboelastometry and TEG whole blood coagulation profiles were compared between VWD patients (n = 100) and healthy controls (n = 89)...
October 26, 2016: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/27779583/model-of-trauma-induced-coagulopathy-including-hemodilution-fibrinolysis-acidosis-and-hypothermia-impact-on-blood-coagulation-and-platelet-function
#9
Boris Shenkman, Ivan Budnik, Yulia Einav, Hagit Hauschner, Mykhaylo Andrejchin, Uriel Martinowitz
BACKGROUND: Trauma-induced coagulopathy (TIC) is commonly seen among patients with severe injury. The dynamic process of TIC is characterized by variability of the features of the disease. METHODS: A model of TIC was created. Hemodilution was produced by mixing the blood with 40% TRIS/saline solution, fibrinolysis by treating the blood with 160 ng/mL tPA, acidosis by adding 1.2 mg/mL lactic acid achieving pH 7.0-7.1, and hypothermia by running the assay at 31 °C...
October 25, 2016: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/27777753/coagulative-safety-of-epidural-catheters-after-major-upper-gastrointestinal-surgery-advanced-and-routine-coagulation-analysis-in-38-patients
#10
Owain Thomas, Hampus Rein, Karin Strandberg, Ulf Schött
BACKGROUND: The risk of spinal haematoma in patients receiving epidural catheters is estimated using routine coagulation tests, but guidelines are inconsistent in their recommendations on what to do when results indicate slight hypocoagulation. Postoperative patients are prone to thrombosis, and thromboelastometry has previously shown hypercoagulation in this setting. We aimed to better understand perioperative haemostasis by comparing results from routine and advanced tests, hypothesizing that patients undergoing major upper gastrointestinal surgery would be deficient in vitamin K-dependent coagulation factors because of malnutrition, or hypocoagulative because of accumulation of low molecular weight heparin (LMWH)...
2016: Perioperative Medicine
https://www.readbyqxmd.com/read/27776919/ischemic-stroke-in-a-patient-with-moderate-to-severe-inherited-factor-vii-deficiency
#11
Manasa Reddy, Bernard Tawfik, Chakri Gavva, Sean Yates, Nicole De Simone, Sandra L Hofmann, Siayareh Rambally, Ravi Sarode
Thrombosis is known to occur in patients with rare inherited bleeding disorders, usually in the presence of a thrombotic risk factor such as surgery and/or factor replacement therapy, but sometimes spontaneously. We present the case of a 72-year-old African American male diagnosed with congenital factor VII (FVII) deficiency after presenting with ischemic stroke, presumably embolic, in the setting of atherosclerotic carotid artery stenosis. The patient had an international normalized ratio (INR) of 2.0 at presentation, with FVII activity of 6% and normal Extem clotting time in rotational thromboelastometry...
October 17, 2016: Transfusion and Apheresis Science
https://www.readbyqxmd.com/read/27766635/procoagulant-profile-in-patients-with-immune-thrombocytopenia
#12
María T Álvarez-Román, Ihosvany Fernández-Bello, Víctor Jiménez-Yuste, Mónica Martín-Salces, Elena G Arias-Salgado, María I Rivas Pollmar, Raúl Justo Sanz, Nora V Butta
Despite their low platelet count some immune thrombocytopenia (ITP) patients seldom bleed, indicating the presence of factors to compensate thrombocytopenia. Moreover, ITP patients may have an increased risk for thrombosis. These facts suggest the presence of procoagulant mechanisms that have not been clarified yet. The aim of this study was to identify these possible factors. Moreover, the utility of rotational thromboelastometry (ROTEM(®) ) to test haemostasis in these patients was also evaluated. Patients with ITP presented a procoagulant profile due to an increased amount of platelet- and red cell-microparticles, an increased resistance to protein C and the formation of a clot more resistant to fibrinolysis due to augmented levels of plasminogen activator inhibitor-1, which might reflect an endothelial damage/activation in ITP patients...
December 2016: British Journal of Haematology
https://www.readbyqxmd.com/read/27757554/thromboelastometry-guided-fibrinogen-replacement-therapy-in-cardiac-surgery-a-retrospective-observational-study
#13
Francesco Vasques, Luca Spiezia, Alberto Manfrini, Vincenzo Tarzia, Dario Fichera, Paolo Simioni, Gino Gerosa, Carlo Ori, Guido Di Gregorio
This retrospective, observational study compared the impact of a point-of-care rotational thromboelastometry (ROTEM(®)) method versus conventional bleeding management in terms of postoperative (24-h) blood loss, intraoperative and postoperative (24-h) transfusion requirement and length of stay in the postoperative intensive care unit (ICU) in patients undergoing cardiac surgery. Forty consecutive patients undergoing cardiac surgery under ROTEM(®)-guided hemostatic management were enrolled; the control population included 40 selected patients undergoing similar interventions without ROTEM(®) monitoring...
October 18, 2016: Journal of Anesthesia
https://www.readbyqxmd.com/read/27749339/comparison-of-seer-sonorheometry-with-rotational-thromboelastometry-and-laboratory-parameters-in-cardiac-surgery
#14
Julie L Huffmyer, Lucas G Fernandez, Cyrus Haghighian, Abdullah S Terkawi, Danja S Groves
BACKGROUND: The Quantra Hemostasis Analyzer is a novel diagnostic device that uses an ultrasound-based technology, sonic estimation of elasticity via resonance (SEER) sonorheometry, to characterize the dynamic changes in viscoelastic properties of a blood sample during coagulation. Cardiac surgery utilizing cardiopulmonary bypass (CPB) is associated with a significant impact on the coagulation system and can result in perioperative coagulopathy. The aim of this study was to correlate SEER sonorheometry results to corresponding rotational thromboelastometry (ROTEM) and laboratory parameters obtained before, during, and after CPB...
December 2016: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/27716278/a-systematic-review-on-the-rotational-thrombelastometry-rotem%C3%A2-values-for-the-diagnosis-of-coagulopathy-prediction-and-guidance-of-blood-transfusion-and-prediction-of-mortality-in-trauma-patients
#15
Precilla V Veigas, Jeannie Callum, Sandro Rizoli, Bartolomeu Nascimento, Luis Teodoro da Luz
INTRODUCTION: Viscoelastic assays have been promoted as an improvement over traditional coagulation tests in the management of trauma patients. Rotational thromboelastometry (ROTEM®) has been used to diagnose coagulopathy and guide hemostatic therapy in trauma. This systematic review of clinical studies in trauma investigates the ROTEM® parameters thresholds used for the diagnosing coagulopathy, predicting and guiding transfusion and predicting mortality. METHODS: Systematic literature search was performed using MEDLINE, EMBASE and Cochrane databases...
October 3, 2016: Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine
https://www.readbyqxmd.com/read/27712970/implementing-a-statistical-model-for-protamine-titration-effects-on-coagulation-in-cardiac-surgical-patients
#16
Oskar Hällgren, Staffan Svenmarker, Micael Appelblad
OBJECTIVES: To implement a statistical model for protamine titration. DESIGN: Prospective randomized trial. SETTING: University hospital. PARTICIPANTS: Sixty (n = 30+30) patients scheduled for elective coronary artery bypass surgery were randomly assigned to 2 groups. INTERVENTIONS: Protamine dose calculated according to an algorithm established from a statistical model or to a fixed protamine-heparin dose ratio (1:1)...
July 17, 2016: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/27711024/reference-intervals-of-thromboelastometric-evaluation-of-coagulation-in-pediatric-patients-with-congenital-heart-diseases-a-retrospective-investigation
#17
Ji Young Kim, Yu Rim Shin, Hae Keum Kil, Mi Ran Park, Jong Wha Lee
BACKGROUND Rotational thromboelastometry (ROTEM®) is a point-of-care test for coagulation, enabling physicians to make a swift decision. The aim of this investigation was to establish reference intervals of thromboelastometric evaluation for coagulation in pediatric patients with congenital heart diseases (CHD). MATERIAL AND METHODS As baseline data, 3 assays of ROTEM® (INTEM, EXTEM, and FIBTEM) were measured after anesthesia induction. ROTEM® parameters were clotting time (CT), amplitude at 10 min (A10), clot formation time (CFT), a angle, maximal clot firmness (MCF), clot lysis index at 60 min (LI60), and maximal clot elasticity (MCE)...
October 6, 2016: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/27650566/-the-role-of-rotational-thromboelastometry-rotem-in-the-perioperative-period-in-a-warfarinized-patient-case-report
#18
M Durila, J Schützner, T Vymazal
UNLABELLED: Warfarin overdose with unmeasurable values of the prothrombin time (PT-INR) is a significant problem in the preoperative preparation of the patient for acute invasive surgery. In contrast to conventional blood clotting assays, rotational thromboelastometry (ROTEM) evaluates the coagulation profile of the whole blood and provides a more complex view of the coagulation status of the patient. Thromboelastometry results are available within about 10 minutes and help us to provide targeted "bedside" therapy of coagulopathy in a bleeding patient...
2016: Rozhledy V Chirurgii: Měsíčník Československé Chirurgické Společnosti
https://www.readbyqxmd.com/read/27634287/rotational-thromboelastometry-can-detect-factor-xiii-deficiency-and-bleeding-diathesis-in-patients-with-cirrhosis
#19
Sotiria Bedreli, Jan-Peter Sowa, Saraa Malek, Sandra Blomeyer, Antonios Katsounas, Guido Gerken, Fuat H Saner, Ali Canbay
BACKGROUND & AIMS: Patients with progressive liver disease exhibit complex coagulation disorders. Factor XIII plays a crucial role in the last steps of haemostasis, and its deficiency is associated with an increased incidence of bleeding diathesis. However, current conventional coagulation tests cannot detect factor XIII deficiency. In this study, we examined factor XIII activity and the ability of rotational thromboelastometry to detect factor XIII deficiency and bleeding diathesis in patients with cirrhosis...
September 16, 2016: Liver International: Official Journal of the International Association for the Study of the Liver
https://www.readbyqxmd.com/read/27611498/plasminogen-activator-inhibitor-type-1-in-platelets-induces-thrombogenicity-by-increasing-thrombolysis-resistance-under-shear-stress-in-an-in-vitro-flow-chamber-model
#20
Kazuya Hosokawa, Tomoko Ohnishi-Wada, Hisayo Sameshima-Kaneko, Tomoka Nagasato, Naoki Miura, Kiyoshi Kikuchi, Takehiko Koide, Ikuro Maruyama, Tetsumei Urano
INTRODUCTION: Despite the proven benefits of thrombolytic therapy with tissue plasminogen activator (t-PA) for peripheral thromboembolism, perfusion failure frequently occurs, particularly in arterial circulation. We evaluated how the modification of fibrinolytic activity affects thrombus formation under flow and static conditions. MATERIALS AND METHODS: t-PA-treated human whole-blood samples (n=6) were perfused over a microchip coated with collagen and tissue thromboplastin at different shear rates, and thrombus formation was quantified by measuring flow pressure changes...
October 2016: Thrombosis Research
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