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Thromboelastography

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https://www.readbyqxmd.com/read/28715503/effects-of-preoperative-aspirin-on-perioperative-platelet-activation-and-dysfunction-in-patients-undergoing-off-pump-coronary-artery-bypass-graft-surgery-a-prospective-randomized-study
#1
Jiwon Lee, Chul-Woo Jung, Yunseok Jeon, Tae Kyong Kim, Youn Joung Cho, Chang-Hoon Koo, Yoon Hyeong Choi, Ki-Bong Kim, Ho Young Hwang, Hang-Rae Kim, Ji-Young Park
The benefit of aspirin use after coronary artery bypass graft surgery has been well proven. However, the effect of preoperative aspirin use in patients undergoing off-pump coronary artery bypass graft surgery (OPCAB) has not been evaluated sufficiently. To evaluate platelet function changes during OPCAB due to preoperative aspirin use, we conducted a randomized controlled trial using flow cytometry and the Multiplate® analyzer. Forty-eight patients scheduled for elective OPCAB were randomized to the aspirin continuation (100 mg/day until operative day) and discontinuation (4 days before the operative day) groups...
2017: PloS One
https://www.readbyqxmd.com/read/28707410/treatment-of-an-acquired-factor-xiii-inhibitor-in-an-adolescent-with-systemic-lupus-erythematosus-and-renal-failure
#2
Cara A Rabik, Meredith A Atkinson, Sangeeta Sule, John J Strouse
BACKGROUND: Factor (F)XIII deficiency is a rare inherited bleeding disorder, but can also be acquired due to the development of inhibitors. CASE REPORT: A 17-year-old female with systemic lupus erythematosus and end-stage kidney disease secondary to Class IV lupus nephritis developed spontaneous subcutaneous and muscular hematomas and delayed major bleeding after invasive procedures. She had abnormal kaolin thromboelastography (kTEG; decreased maximal amplitude, representative of clot strength) initially attributed to thrombocytopenia and uremic platelet dysfunction, but her FXIII activity was undetectable, and a high-titer antibody against FXIII was identified...
July 13, 2017: Transfusion
https://www.readbyqxmd.com/read/28695976/adaptation-of-global-hemostasis-to-therapeutic-hypothermia-in-patients-with-out-of-hospital-cardiac-arrest-thromboelastography-study
#3
Aleksander Trąbka-Zawicki, Marek Tomala, Aleksander Zeliaś, Elżbieta Paszek, Wojciech Zajdel, Ewa Stępień, Krzysztof Żmudka
BACKGROUND: The use of mild therapeutic hypothermia (MTH) in patients after out-of-hospital cardiac arrest (OHCA) who are undergoing primary percutaneous coronary intervention (pPCI) can protect patients from thromboembolic complications. The aim of the study was to evaluate the adaptive mechanisms of the coagulation system in MTH-treated comatose OHCA survivors. METHODS: Twenty one comatose OHCA survivors with acute coronary syndrome undergoing immediate pPCI were treated with MTH...
July 11, 2017: Cardiology Journal
https://www.readbyqxmd.com/read/28671597/precipitation-and-neutralization-of-heparin-from-different-sources-by-protamine-sulfate
#4
John Hogwood, Barbara Mulloy, Elaine Gray
Current therapeutic unfractionated heparin available in Europe and US is of porcine mucosal origin. There is now interest, specifically in the US, to use bovine mucosa as an additional source for the production of heparin. The anticoagulant action of heparin can be neutralized by protamine sulfate, and in this study the ability of protamine to bind and neutralize the anticoagulant activities of heparin from porcine mucosa, bovine mucosa and bovine lung were assessed. Protamine sulfate was able to bind and precipitate similar amounts of heparins from different sources on a mass basis...
July 2, 2017: Pharmaceuticals
https://www.readbyqxmd.com/read/28671072/anticoagulant-activity-of-oral-rivaroxaban-in-healthy-dogs
#5
B Conversy, M C Blais, M Dunn, C Gara-Boivin, J R E Del Castillo
Rivaroxaban is an oral, direct factor Xa inhibitor used in human thrombotic disorders. In view of the in vitro concentration dependent anticoagulant effects of rivaroxaban in dogs, the time course of its anticoagulant effects was characterized in healthy dogs. Twenty-four healthy Beagles were randomized into three groups (n = 8 per group) and received orally either a placebo or 20 mg rivaroxaban once or twice at an 8 h interval. Fifteen blood samples were collected over a 30 h period, and blindly assayed for prothrombin time (PT), activated partial thromboplastin time (aPTT), tissue factor induced thrombin generation (TG) and anti-factor Xa activity...
May 2017: Veterinary Journal
https://www.readbyqxmd.com/read/28662614/thromboelastography-in-term-neonates
#6
Nicholas J Schott, Stephen P Emery, Courtney Garbee, Jonathan Waters
BACKGROUND: Thromboelastography (TEG) is utilized as a point-of-care test of coagulation function to improve evidence-based blood product replacement in adults. In contrast to standard indices of coagulation, TEG reflects the dynamic interactions among the elements involved in hemostasis, including fibrinolysis. Although normal adult values and various abnormalities have been characterized, normative values for term neonates have not been described. Studies of neonatal TEG remain limited and have small sample sizes with inconsistent methodology...
June 29, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28650356/trending-fibrinolytic-dysregulation-fibrinolysis-shutdown-in-the-days-after-injury-is-associated-with-poor-outcome-in-severely-injured-children
#7
Christine M Leeper, Matthew D Neal, Christine J McKenna, Barbara A Gaines
OBJECTIVE: To trend fibrinolysis after injury and determine the influence of traumatic brain injury (TBI) and massive transfusion on fibrinolysis status. BACKGROUND: Admission fibrinolytic derangement is common in injured children and adults, and is associated with poor outcome. No studies examine fibrinolysis days after injury. METHODS: Prospective study of severely injured children at a level 1 pediatric trauma center. Rapid thromboelastography was obtained on admission and daily for up to 7 days...
July 22, 2017: Annals of Surgery
https://www.readbyqxmd.com/read/28639693/thromboelastography-may-predict-risk-of-grade-2-bleeding-in-thrombocytopenic-patients
#8
E N Opheim, T O Apelseth, S J Stanworth, G E Eide, T Hervig
BACKGROUND AND OBJECTIVES: Platelet count is used as a prophylactic platelet transfusion trigger, although evidence suggests that it is a poor predictor of bleeding. Thus, alternative tests are required. The primary objective of this study was to compare thromboelastography (TEG) parameters on days with and without bleeding symptoms. The secondary objectives were to investigate the relationship between TEG parameters and haematological variables, fever, C-reactive protein (CRP) and platelet transfusion...
June 22, 2017: Vox Sanguinis
https://www.readbyqxmd.com/read/28628602/procoagulant-activity-of-human-mesenchymal-stem-cells
#9
Barbara A Christy, Maryanne C Herzig, Robbie K Montgomery, Christopher Delavan, James A Bynum, Kristin M Reddoch, Andrew P Cap
BACKGROUND: Allogeneic mesenchymal stem cells (MSCs) show great potential for the treatment of military and civilian trauma based on their reduced immunogenicity and ability to modulate inflammation and immune function in the recipient. Although generally considered to be safe, MSCs express tissue factor (TF), a potent activator of coagulation. In the current study, we evaluated multiple MSC populations for tissue factor expression and procoagulant activity to characterize safety considerations for systemic use of MSCs in trauma patients who may have altered coagulation homeostasis...
July 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28625299/managing-major-obstetric-haemorrhage-pharmacotherapy-and-transfusion
#10
REVIEW
Rachel Collis, Emilia Guasch
Major obstetric haemorrhage is a leading cause of maternal mortality. A prescriptive approach to early recognition and management is critical to improving outcomes. Uterine atony is the primary cause of post-partum haemorrhage. First-line prevention and treatment include the administration of uterine tonic agents; other conservative measures include uterine cavity tamponade and uterine compression sutures. Interventional radiology procedures have been used for both prophylaxis and treatment, but a hysterectomy may be necessary if conservative measures fail...
March 2017: Best Practice & Research. Clinical Anaesthesiology
https://www.readbyqxmd.com/read/28624047/viscoelastic-monitoring-in-pediatric-trauma-a-survey-of-pediatric-trauma-society-members
#11
Robert T Russell, Ilan I Maizlin, Adam M Vogel
BACKGROUND: Viscoelastic monitoring (VEM), including thromboelastography (TEG) and rotational thromboelastometry (ROTEM) in the setting of goal-directed hemostatic resuscitation has been shown to improve outcomes in adult trauma. The American College of Surgeons (ACS) Committee on Trauma recommends that "thromboelastography should be available at level I and level II trauma centers". The purpose of this study is to determine the current availability and utilization of VEM in pediatric trauma...
June 15, 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28614427/a-new-era-of-thromboelastometry
#12
Tomaz Crochemore, Felipe Maia de Toledo Piza, Roseny Dos Reis Rodrigues, João Carlos de Campos Guerra, Leonardo José Rolim Ferraz, Thiago Domingos Corrêa
Severe hemorrhage with necessity of allogeneic blood transfusion is common complication in intensive care unit and is associated with increased morbidity and mortality. Prompt recognition and treatment of bleeding causes becomes essential for the effective control of hemorrhage, rationalizing the use of allogeneic blood components, and in this way, preventing an occurrence of their potential adverse effects. Conventional coagulation tests such as prothrombin time and activated partial thromboplastin time present limitations in predicting bleeding and guiding transfusion therapy in critically ill patients...
June 12, 2017: Einstein
https://www.readbyqxmd.com/read/28601310/hemoglobin-based-oxygen-carriers-promote-systemic-hyperfibrinolysis-that-is-both-dependent-and-independent-of-plasmin
#13
Alexander P Morton, Ernest E Moore, Hunter B Moore, Eduardo Gonzalez, Michael P Chapman, Erik Peltz, Anirban Banerjee, Christopher Silliman
BACKGROUND: Hyperfibrinolysis plays an integral role in the genesis of trauma-induced coagulopathy. Recent data demonstrate that red blood cell lysis promotes fibrinolysis; however, the mechanism is unclear. Hemoglobin-based oxygen carriers (HBOCs) have been developed for resuscitation and have been associated with coagulopathy. We hypothesize that replacement of whole blood (WB) using an HBOC results in a coagulopathy because of the presence of free hemoglobin. MATERIALS AND METHODS: WB was sampled from healthy donors (n = 6)...
June 1, 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28601210/tranexamic-acid-use-in-prehospital-uncontrolled-hemorrhage
#14
REVIEW
Benjamin R Huebner, Warren C Dorlac, Chris Cribari
The use of tranexamic acid (TXA) in the treatment of trauma patients was relatively unexplored until the landmark Clinical Randomisation of an Antifibrinolytic in Significant Haemorrhage-2 (CRASH-2) trial in 2010 demonstrated a reduction in mortality with the use of TXA. Although this trial was a randomized, double-blinded, placebo-controlled study incorporating >20,000 patients, numerous limitations and weaknesses have been described. As a result, additional studies have followed, delineating the potential risks and benefits of TXA administration...
June 2017: Wilderness & Environmental Medicine
https://www.readbyqxmd.com/read/28598908/the-rate-of-deep-vein-thrombosis-doubles-in-trauma-patients-with-hypercoagulable-thromboelastography
#15
Jason B Brill, Jayraan Badiee, Ashley L Zander, James D Wallace, Paul R Lewis, Michael J Sise, Vishal Bansal, Steven R Shackford
BACKGROUND: Venous thromboembolism (VTE) in trauma can occur in patients at low risk. Conventional coagulation tests do not predict VTE. Studies investigating thromboelastography (TEG) for VTE risk are conflicting and have not included routine surveillance to detect deep vein thrombosis (DVT). We undertook a prospective study of TEG to evaluate its utility in predicting VTE. METHODS: We conducted a prospective cohort study on all adult trauma patients admitted to our level I trauma center from 2013 to 2015...
June 9, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28597485/comparison-of-haemostatic-function-of-pas-c-platelets-vs-plasma-platelets-in-reconstituted-whole-blood-using-impedance-aggregometry-and-thromboelastography
#16
F M A van Hout, I J Bontekoe, L A E de Laleijne, J-L Kerkhoffs, D de Korte, J Eikenboom, J G van der Bom, P F van der Meer
BACKGROUND AND OBJECTIVES: There are concerns about the haemostatic function of platelets stored in platelet additive solution (PAS). Aim of this study was to compare the haemostatic function of PAS-C-platelets to plasma-platelets in reconstituted whole blood. MATERIALS AND METHODS: In our experiment, whole blood was reconstituted with red blood cells, solvent-detergent (SD) plasma and either PAS-C-platelets or plasma-platelets (n = 7) in a physiological ratio. On storage days 2, 5, 8 and 13, the agonist-induced aggregation (multiple electrode aggregometry), clot formation (thromboelastography) and agonist-induced CD62P responsiveness (flow cytometry) were measured...
June 9, 2017: Vox Sanguinis
https://www.readbyqxmd.com/read/28584429/thromboelastography-for-evaluation-of-coagulopathy-in-nonbleeding-patients-with-sepsis-at-intensive-care-unit-admission
#17
Syed Nabeel Muzaffar, Arvind Kumar Baronia, Afzal Azim, Anupam Verma, Mohan Gurjar, Banani Poddar, Ratender Kumar Singh
BACKGROUND: Thromboelastography (TEG) is a global test of coagulation which analyzes the whole coagulation process. TEG is popular in trauma, liver transplant, and cardiac surgeries, but studies in sepsis are limited. We have assessed the utility of TEG for evaluating coagulopathy in nonbleeding patients with sepsis. MATERIALS AND METHODS: A prospective, observational study was done in 12-bedded Intensive Care Unit (ICU) of a tertiary care hospital in North India, during May 2014-November 2014...
May 2017: Indian Journal of Critical Care Medicine
https://www.readbyqxmd.com/read/28583423/postoperative-bleeding-after-change-in-heparin-supplier-a-cardiothoracic-center-experience
#18
Mirela Bojan, Andreas Fischer, Ashok Narayanasamy, Paul Yea, Eleanor Dunnett, Andrea Kelleher
OBJECTIVE: Unfractionated heparin is a mixture of glycosaminoglycans with different pharmacologic and pharmacokinetic properties. The literature suggests that blood loss after cardiac surgery is related to both elevated postoperative heparin concentrations and the potency of different heparin brands. DESIGN: An audit of the observed increase in the incidence of cardiac surgery-related bleeding after change in heparin supplier. Patient characteristics were compared between groups before and after a change in heparin brands...
February 16, 2017: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/28576889/blood-coagulation-system-in-patients-with-chronic-kidney-disease-a-prospective-observational-study
#19
Meng-Jie Huang, Ri-Bao Wei, Yang Wang, Ting-Yu Su, Ping Di, Qing-Ping Li, Xi Yang, Ping Li, Xiang-Mei Chen
OBJECTIVES: Thromboembolic events are the major factor affecting the prognosis of patients with chronic kidney disease (CKD). Haemostatic alterations are possible causes of these complications, but their roles remain poorly characterised. In the prospective observational study, we investigated the entire coagulation process in patients with CKD to elucidate the mechanisms of their high thromboembolic risk. METHODS: A total of 95 patients with CKD and 20 healthy controls who met the inclusion criteria were consecutively recruited from September 2015 to March 2016...
June 1, 2017: BMJ Open
https://www.readbyqxmd.com/read/28557108/thromboelastography-teg-or-thromboelastometry-rotem-to-monitor-haemostatic-treatment-versus-usual-care-in-adults-or-children-with-bleeding
#20
Anne Wareing
No abstract text is available yet for this article.
May 30, 2017: International Journal of Nursing Practice
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