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Thrombelastography

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https://www.readbyqxmd.com/read/28767444/thrombin-induced-platelet-fibrin-clot-strength-in-relation-to-platelet-volume-indices-and-inflammatory-markers-in-patients-with-coronary-artery-disease
#1
Hai-Chen Lv, Hong-Yi Wu, Jia-Sheng Yin, Jun-Bo Ge
Platelet aggregation and inflammation are both implicated in coronary artery disease (CAD). Thrombin induced platelet-fibrin clot strength (MAThrombin) measured by thrombelastography (TEG) has been proved to be a novel marker of platelet aggregation. The aim of this study was to investigate the correlation of MAThrombin to platelet volume indices (PVIs) or to inflammatory markers in different types of CAD. 206 patients with different types of CAD were enrolled. MAThrombin, PVIs, including mean platelet volume (MPV), platelet distribution width (PDW), and platelet-large cell ratio (P-LCR) as well as inflammatory markers, including high-sensitivity C-reactive protein (hs-CRP) and fibrinogen (Fbg) were measured...
July 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28764996/coagulopathy-as-a-predictor-of-mortality-after-penetrating-traumatic-brain-injury
#2
Lindley E Folkerson, Duncan Sloan, Elizabeth Davis, Ryan S Kitagawa, Bryan A Cotton, John B Holcomb, Jeffrey S Tomasek, Charles E Wade
STUDY HYPOTHESIS: Traumatic brain injury (TBI) is a leading cause of mortality with penetrating TBI (p-TBI) patients having worse outcomes. These patients are more likely to be coagulopathic than blunt TBI (b-TBI) patients, thus we hypothesize that coagulopathy would be an early predictor of mortality. METHODS: We identified highest-level trauma activation patients who underwent an admission head CT and had ICU admission orders from August 2009-May 2013, excluding those with polytrauma and anticoagulant use...
July 5, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28755903/tranexamic-acid-is-associated-with-increased-mortality-in-patients-with-physiological-fibrinolysis
#3
Hunter B Moore, Ernest E Moore, Benjamin R Huebner, Gregory R Stettler, Geoffrey R Nunns, Peter M Einersen, Christopher C Silliman, Angela Sauaia
BACKGROUND: Tranexamic acid (TXA) administration after trauma has not been proven to improve survival in the United States. Trauma patients were presented to the hospital with a spectrum of fibrinolytic activity, in which physiological levels of fibrinolysis are associated with the lowest mortality. We hypothesize that trauma patients who present to the hospital with physiological levels of fibrinolysis will have increased mortality if they receive TXA. MATERIALS AND METHODS: Severely injured trauma patients, followed prospectively from 2014 to 2016, were included in the analysis...
May 8, 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28738008/randomized-placebo-controlled-study-of-the-effects-of-yunnan-baiyao-on-hemostasis-in-horses
#4
SallyAnne L Ness, Amelia H Frye, Thomas J Divers, Mark Rishniw, Hollis N Erb, Marjory B Brooks
OBJECTIVE To determine effects of oral administration of Yunnan Baiyao on platelet activation, coagulation, and fibrinolysis in healthy horses. ANIMALS 12 healthy adult horses. PROCEDURES In a randomized blinded crossover study that included a 4-week washout period between treatments, horses were orally administered a paste containing Yunnan Baiyao (15 mg/kg) or placebo at 12-hour intervals for 3 days. Blood samples were collected before start of treatment (time 0) and at 24 and 72 hours for a CBC, measurement of fibrinogen concentration, coagulation screening tests, and a panel of assays to assess platelet activation (including ADP- and collagen-induced aggregation and closure times, flow-cytometric variables of platelet-leukocyte aggregates, platelet membrane P-selectin and phosphatidylserine expression, and microparticle release), von Willebrand factor (vWF) concentration, and cofactor activity...
August 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/28701681/inflammation-is-associated-with-platelet-coagulation-function-rather-than-enzymatic-coagulation-function-in-patients-with-takayasu-arteritis
#5
Xiao Wang, Aimin Dang, Naqiang Lv, Nan Cheng, Xuesen Cheng
The integral changes of coagulation and fibrinolysis, and their relationships with inflammation in patients with Takayasu arteritis (TA) remain undetermined. The purpose of this study was to analyze the changes of coagulation and fibrinolysis process in patients with TA by thrombelastography (TEG).A total of 127 patients with TA and 55 healthy controls were enrolled. Patients with TA were grouped according to disease activity. The routine hematological parameters, traditional coagulation assays, and TEG parameters were summarized retrospectively...
August 3, 2017: International Heart Journal
https://www.readbyqxmd.com/read/28696521/characterization-of-the-rabbit-as-an-in-vitro-and-in-vivo-model-to-assess-the-effects-of-fibrinogenolytic-activity-of-snake-venom-on-coagulation
#6
Vance G Nielsen, Elda E Sánchez, Daniel T Redford
Several in vitro investigations have demonstrated that anticoagulant effects of fibrinogenolytic snake venom metalloproteinases have been abrogated in human plasma by modifying fibrinogen with iron (Fe) and carbon monoxide (CO) to prevent catalysis or by directly inhibiting these enzymes with CO. To translate these findings, we chose to assess the rabbit as a model of envenomation with Crotalus atrox venom. It was determined with thrombelastography that 15 times the concentration of venom noted to compromise coagulation in plasma in vitro was required to cause coagulopathy in vivo, likely secondary to venom binding to blood cells and being cleared from the circulation rapidly...
July 11, 2017: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28695310/central-aortic-pulse-pressure-thrombogenicity-and-cardiovascular-risk
#7
Gailing Chen, Kevin P Bliden, Rahul Chaudhary, Fang Liu, Himabindu Kaza, Eliano P Navarese, Udaya S Tantry, Paul A Gurbel
High central aortic pulse pressure (CPP) and thrombin-induced platelet-fibrin clot strength (TIP-FCS) have been associated with ischemic outcomes in patients with coronary artery disease in separate studies. But, the ischemic risk associated with these factors has never been analyzed in a single study and their interrelation is unknown. The primary aim of the study was to establish cut points for CPP and TIP-FCS measured at the time of catheterization associated with long term major adverse cardiovascular events...
August 2017: Journal of Thrombosis and Thrombolysis
https://www.readbyqxmd.com/read/28693686/the-correlation-of-indices-in-r-teg-with-intra-operative-blood-loss-in-neurosurgical-patients
#8
Xue Zhang, Xuerong Yu, Yuguang Huang
Objective Intra-operative coagulopathy has a close relationship with blood loss and the prognosis of patients. Rapid-thrombelastography (r-TEG) is a comprehensive assessment of coagulation abnormalities and also an effective way for constructing blood transfusion. This study attempts to investigate the correlation of r-TEG indices with intra-operative hemorrhage.Methods Patients who underwent transphenoidal hypophysectomy and craniotomy from January 15 to April 30, 2013 in Peking Union Medical College hospital were recruited...
June 10, 2017: Chinese Medical Sciences Journal, Chung-kuo i Hsüeh K'o Hsüeh Tsa Chih
https://www.readbyqxmd.com/read/28691277/crotalus-atrox-venom-exposed-to-carbon-monoxide-has-decreased-fibrinogenolytic-activity-in-vivo-in-rabbits
#9
Vance G Nielsen
Envenomation by haemotoxic enzymes remains a significant source of human morbidity and mortality worldwide, with administration of long-acting or multiple doses of antivenom first-line therapy. However, coagulopathy can still occur and recur. Of interest, it has been recently demonstrated that direct, isolated exposure of snake venom enzymes with fibrinogenolytic activity to carbon monoxide (CO) abrogates venom-mediated loss of coagulation in human plasma. These observations of CO inhibition of venom fibrinogenolytic activity were subsequently repeated in rabbit whole blood...
July 10, 2017: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28641648/-change-of-thrombelastography-in-children-s-dic-and-analysis-of-its-sensitivity-and-specificity-for-diagnosis-of-dic
#10
Wen-Hao Yuan, Han-Chu Liu, Ling-Kong Zeng, Xiao-Yan Liu, Ling-Xia Zhao, Lu-Xia Mo
OBJECTIVE: To investigate the influence of thrombelastography index changes on its sensitivity and specificity for diagnosis of disseminated intravascular coagulation (DIC) in children. METHODS: A total of 149 children with DIC in our hospital from June 2013 to June 2016 were selected in DIC group, while 106 cases of non-DIC, including healthy children and children with diseases easily confused with DIC, were selected as non-DIC(control) group. The thrombelastography, D-dimer, coagulation functions including prothrombintime (PT), activated partial thromboplastin time (APTT), fibrinogen (FIB) and fibin degradation product (FDP), congental coagulation disorders and platelet count were detected in DIC and non-DIC groups; the statistics of data was performed and the sensitivity and specificity of thromelastraphy indexes such as R time, α angle MA value and A value were evaluated; the relationship of DIC with indexes was analyzed...
June 2017: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/28583756/thrombelastography-indicates-limitations-of-animal-models-of-trauma-induced-coagulopathy
#11
Gregory R Stettler, Ernest E Moore, Hunter B Moore, Peter J Lawson, Miguel Fragoso, Geoffrey R Nunns, Christopher C Silliman, Anirban Banerjee
BACKGROUND: Thrombelastography (TEG) has been used to characterize the coagulation changes associated with injury and shock. Animal models developed to investigate trauma-induced coagulopathy (TIC) have failed to produce excessive bleeding. We hypothesize that a native TEG will demonstrate marked differences in humans compared with these experimental models, which explains the difficulties in reproducing a clinically relevant coagulopathy in animal models. METHODS: Whole blood was collected from 138 healthy human volunteers, 25 swine and 66 Sprague-Dawley rats before experimentation...
May 11, 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28570309/admission-rapid-thrombelastography-rteg%C3%A2-values-predict-resuscitation-volumes-and-patient-outcomes-after-thermal-injury
#12
Todd F Huzar, Eric Martinez, Joseph Love, Tonya C George, Jaimin Shah, Lisa Baer, James M Cross, Charles E Wade, Bryan A Cotton
In trauma, admission rapid thrombelastography (rTEG) has been shown to predict in-hospital thromboembolic events, guide treatment of coagulopathy, and identify likely to require large volume resuscitations. We sought to evaluate the use of rTEG in describing the coagulation status of major burn patients at admission and assess whether rTEG values predicted resuscitation volumes and patient outcomes. This is a retrospective study of all patients admitted to our Burn ICU between January 2010 and December 2012...
May 26, 2017: Journal of Burn Care & Research: Official Publication of the American Burn Association
https://www.readbyqxmd.com/read/28550916/assessment-of-three-point-of-care-platelet-function-assays-in-adult-trauma-patients
#13
Christopher Robert Connelly, John D Yonge, Sean P McCully, Kyle D Hart, Thomas C Hilliard, Diane E Lape, Justin J Watson, Beth Rick, Ben Houser, Thomas G Deloughery, Martin A Schreiber, Laszlo N Kiraly
BACKGROUND: Antiplatelet (AP) medication use is common among trauma patients and is associated with poor outcomes. Management options for platelet dysfunction in trauma patients are controversial, expensive, and potentially harmful. Although light transmission platelet aggregometry is considered the standard test to assess platelet function, it is cumbersome and not generally available. Currently, there are no widely accepted platelet function point-of-care tests for acute trauma. STUDY DESIGN: Prospective observational study from 2014 to 2015...
May 15, 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28522144/viscoelastic-tissue-plasminogen-activator-challenge-predicts-massive-transfusion-in-15-minutes
#14
Hunter B Moore, Ernest E Moore, Michael P Chapman, Benjamin R Huebner, Peter M Einersen, Solimon Oushy, Christopher C Silliman, Anirban Banerjee, Angela Sauaia
BACKGROUND: Coagulopathy is associated with massive transfusion in trauma, yet most clinical scores to predict this end point do not incorporate coagulation assays. Previous work has identified that shock increases circulating tissue plasminogen activator (tPA). When tPA levels saturate endogenous inhibitors, systemic hyperfibrinolysis can occur. Therefore, the addition of tPA to a patient's blood sample could stratify a patients underlying degree of shock and early coagulation changes to predict progression to massive transfusion...
July 2017: Journal of the American College of Surgeons
https://www.readbyqxmd.com/read/28503123/thromboelastometry-and-thrombelastography-analysis-under-normal-physiological-conditions-systematic-review
#15
Marcel Adler, Sandra Ivic, Nicolas S Bodmer, Hugo Ten Cate, Lucas M Bachmann, Walter A Wuillemin, Michael Nagler
BACKGROUND: Studies investigating thromboelastometry or thrombelastography analyses in a physiological context are scattered and not easy to access. OBJECTIVE: To systematically retrieve and describe published reports studying healthy subjects and targeting at the correlation of ROTEM® and TEG® measurements with conventional parameters of hemostasis. METHODS: Systematic Review: Papers were searched in Medline, Scopus and the Science Citation Index database...
April 2017: Transfusion Medicine and Hemotherapy
https://www.readbyqxmd.com/read/28500653/blood-transfusion-in-the-surgical-treatment-of-adolescent-idiopathic-scoliosis-a-single-center-experience-of-patient-blood-management-in-210-cases
#16
Søren Ohrt-Nissen, Naeem Bukhari, Casper Dragsted, Martin Gehrchen, Pär I Johansson, Jesper Dirks, Jakob Stensballe, Benny Dahl
BACKGROUND: The surgical treatment of adolescent idiopathic scoliosis can be associated with substantial blood loss, requiring allogeneic red blood cell (RBC) transfusion. This study describes the use of RBC and the effect of a standardized perioperative patient blood management program. STUDY DESIGN AND METHODS: Patients treated with posterior instrumented fusion were consecutively enrolled over a 6-year period. Patient blood management strategies were implemented in 2011, including prophylactic tranexamic acid, intraoperative permissive hypotension, restrictive fluid therapy (including avoidance of synthetic colloids), restrictive RBC trigger according to institutional standardized protocol, the use of cell savage, and goal-directed therapy according to thrombelastography...
May 12, 2017: Transfusion
https://www.readbyqxmd.com/read/28500652/freeze-dried-plasma-enhances-clot-formation-and-inhibits-fibrinolysis-in-the-presence-of-tissue-plasminogen-activator-similar-to-pooled-liquid-plasma
#17
Benjamin R Huebner, Ernest E Moore, Hunter B Moore, Angela Sauaia, Gregory Stettler, Monika Dzieciatkowska, Kirk Hansen, Anirban Banerjee, Christopher C Silliman
BACKGROUND: Systemic hyperfibrinolysis is an integral part of trauma-induced coagulopathy associated with uncontrolled bleeding. Recent data suggest that plasma-first resuscitation attenuates hyperfibrinolysis; however, the availability, transport, storage, and administration of plasma in austere environments remain challenging and have limited its use. Freeze-dried plasma (FDP) is a potential alternative due to ease of storage, longer shelf life, and efficient reconstitution. FDP potentially enhances clot formation and resists breakdown better than normal saline (NS) and albumin and similar to liquid plasma...
August 2017: Transfusion
https://www.readbyqxmd.com/read/28372957/hypercoagulability-after-distal-pancreatectomy-just-meaningless-alterations
#18
Matthias Hassenpflug, Christin Tjaden, Ulf Hinz, Johanna Volpert, Thilo Hackert, Markus W Büchler, Jens Werner
BACKGROUND: Perioperative and short-term postoperative parameters are similar comparing spleen-preserving distal pancreatectomy (SPDP) and distal pancreatectomy with splenectomy (DPS). But there are no sound data evaluating the long term risk of postoperative thromboses and infectious complications after splenectomy. The present study evaluated whether the coagulation status differs in patients after SPDP and DPS, and whether that matters clinically. METHODS: A total of 41 patients after DP (SPDP = 20; DPS = 21) were followed up, focusing on alterations of patient coagulation and immune status...
March 19, 2017: Pancreatology: Official Journal of the International Association of Pancreatology (IAP) ... [et Al.]
https://www.readbyqxmd.com/read/28277060/thrombelastographic-hypercoagulability-and-antiplatelet-therapy-after-coronary-artery-bypass-surgery-teg-cabg-trial-a-randomized-controlled-trial
#19
Sulman Rafiq, Pär I Johansson, Klaus F Kofoed, Jens T Lund, Peter S Olsen, Simon Bentsen, Daniel A Steinbrüchel
A hypercoagulable state has, in observational studies, been associated with increased risk of thromboembolic events. The aim of this trial was to study whether dual antiplatelet therapy (DAPT) with clopidogrel in addition to aspirin could reduce the rate of graft occlusions, thromboembolic events, and death compared to aspirin monotherapy in hypercoagulable patients undergoing coronary artery bypass surgery. A total of 1683 patients were screened for eligibility, among which 165 patients were randomized and 133 patients underwent multislice computed tomography scan to evaluate their grafts...
February 22, 2017: Platelets
https://www.readbyqxmd.com/read/28247290/determination-of-non-vitamin-k-oral-anticoagulant-noac-effects-using-a-new-generation-thrombelastography-teg-6s-system
#20
Kevin P Bliden, Rahul Chaudhary, Nafees Mohammed, Adina A Muresan, Carlos G Lopez-Espina, Eli Cohen, Gabriel Raviv, Marc Doubleday, Fowzia Zaman, Blessy Mathew, Udaya S Tantry, Paul A Gurbel
Non vitamin K oral anticoagulants (NOACs) do not require regular monitoring but information about their pharmacodynamic effect may be importantin situations like trauma, stroke oremergent surgery. Currently, no standardized point-of-care test is available to evaluate the anticoagulant effects of NOACs. We evaluated the anticoagulant effect of NOACs with the next generation point-of-care TEG assay (TEG® 6S) based on a fully-automated thrombelastography system. We used two TEG® 6S assays, the DTI assay and Anti-Factor Xa (AFXa) assay, to detect anticoagulant effects and classify NOACs...
May 2017: Journal of Thrombosis and Thrombolysis
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