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https://www.readbyqxmd.com/read/28102740/update-on-functional-and-genetic-laboratory-assays-for-the-detection-of-platelet-microvesicles
#1
Maxime Laroche, Claire Dunois, Anne Marie Vissac, Jean Amiral
Functional and genetic assays for measuring platelet microvesicles (PMVs) are presented and discussed. Functional assays concern two groups of methods: a) homogeneous assays using the cofactor activity of phospholipids (PPLs) contained in PMVs and present in assayed plasmas, and a coagulation or a thrombin generation assay (TGA) as "end points"; b) capture-based assays, in which PMVs bind to an immobilized ligand, such as Annexin V in the presence of calcium, or monoclonal antibodies (MoAbs) specific for membrane proteins...
January 19, 2017: Platelets
https://www.readbyqxmd.com/read/28091816/pediatric-cerebral-sinovenous-thrombosis-following-cranial-surgery
#2
Dmitriy Petrov, Michael Y Uohara, Rebecca Ichord, Zarina Ali, Laura Jastrzab, Shih-Shan Lang, Lori Billinghurst
PURPOSE: Pediatric cerebral sinovenous thrombosis (CSVT) is an important, though less common subtype of pediatric stroke. It has been linked to several risk factors, including cranial procedures, with few studies highlighting this relationship. The aim of this study was to characterize the diagnosis and treatment of CSVT after cranial surgery. METHODS: An institutional pediatric stroke research database was used to identify all CSVT cases diagnosed within 30 days of cranial surgery from November 2004 to December 2014...
January 14, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28079789/the-impact-of-irrigating-fluid-absorption-on-blood-coagulation-in-patients-undergoing-transurethral-resection-of-the-prostate-a-prospective-observational-study-using-rotational-thromboelastometry
#3
Hyun-Jung Shin, Hyo-Seok Na, Young-Tae Jeon, Hee-Pyoung Park, Sun-Woo Nam, Jung-Won Hwang
Although endoscopic transurethral resection of the prostate (TURP) is a well-established procedure as a treatment for benign prostatic hyperplasia, its complications remain a concern. Among these, coagulopathy may be caused by the absorption of irrigating fluid. This study aimed to evaluate such phenomenon using a rotational thromboelastometry (ROTEM).A total of 20 patients undergoing TURP participated in this study. A mixture of 2.7% sorbitol-0.54% mannitol solution and 1% ethanol was used as an irrigating fluid, and fluid absorption was measured via the ethanol concentration in expired breath...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28070050/-clinical-comparative-analysis-for-pulmonary-histoplasmosis-and-progressive-disseminated-histoplasmosis
#4
Yan Zhang, Xiaoli Su, Yuanyuan Li, Ruoxi He, Chengping Hu, Pinhua Pan
To compare clinical features, diagnosis and therapeutic effect between pulmonary histoplasmosis and progressive disseminated histoplasmosis.
 Methods: A retrospective analysis for 12 cases of hospitalized patients with histoplasmosis, who was admitted in Xiangya Hospital, Central South University during the time from February 2009 to October 2015, was carried out. Four cases of pulmonary histoplasmosis and 8 cases of progressive disseminated histoplasmosis were included. The differences of clinical features, imaging tests, means for diagnosis and prognosis were analyzed between the two types of histoplasmosis...
December 28, 2016: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/28063764/plasma-transfusion-in-patients-with-cirrhosis-in-china-a-retrospective-multicenter-cohort-study
#5
REVIEW
Yao Lu, Guixiang Sun, Xiangfu Liu, Zhiguo Liu, Jianguo Tan, Yiwen Hao, Guiqiu Shan, Qun Luo, Deqing Wang, Yanchao Xing, Xianqing Zhang, Jiwu Gong, Simon J Stanworth, Jun Wang, Aiqing Wen
Patients with cirrhosis used to be associated with frequent use of blood components because of their complex disorder of hemostasis and bleeding complications. Recent findings have indicated that patients with cirrhosis have a state of "rebalanced" or even procoagulant hemostasis and have questioned the prophylactic use of plasma. To evaluate the current status of plasma use in patients with cirrhosis, we conducted a retrospective survey in 11 tertiary-care hospitals in China from September 1 to October 31, 2013...
December 2, 2016: Transfusion Medicine Reviews
https://www.readbyqxmd.com/read/28062209/thromboelastogram-does-not-detect-pre-injury-anticoagulation-in-acute-trauma-patients
#6
Jawad T Ali, Mitchell J Daley, Nina Vadiei, Zachary Enright, Joseph Nguyen, Sadia Ali, Jayson D Aydelotte, Pedro G Teixeira, Thomas B Coopwood, Carlos Vr Brown
PURPOSE: Thromboelastography (TEG) has been recommended to characterize post-traumatic coagulopathy, yet no study has evaluated the impact of pre-injury anticoagulation (AC) on TEG variables. We hypothesized patients on pre-injury AC have a greater incidence of coagulopathy on TEG compared to those without AC. METHODS: This retrospective chart review evaluated all trauma patients admitted to an urban, level one trauma center from February 2011 to September 2014 who received a TEG within the first 24h...
December 26, 2016: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28060550/evaluating-platelet-function-disorders-in-children-with-bleeding-tendency-a-single-center-study
#7
Osama Tanous, Orna Steinberg Shemer, Joanne Yacobovich, Meira Zoldan, Yoseph Horovitz, Isaac Yaniv, Esther Rabizadeh, Hannah Tamary, Sigal Nakav, Judith Lahav
Platelet function disorders (PFDs) are a common cause of mild bleeding tendency. However, they cannot be recognized by standard screening studies. The gold standard test for PFD is platelet aggregation, performed by light transmission aggregometry (LTA). A newer and less validated method is the closure time (CT), performed by the platelet function Analyzer 100 (PFA-100). Data regarding the validity of these tests in children are limited. The aim of this study was to evaluate the usefulness of LTA and PFA-100 for the diagnosis of pediatric patients with bleeding tendency...
January 6, 2017: Platelets
https://www.readbyqxmd.com/read/28058213/face-transplantation-anesthetic-challenges
#8
REVIEW
Aparna Dalal
Face transplantation is a complex vascular composite allotransplantation (VCA) surgery. It involves multiple types of tissue, such as bone, muscles, blood vessels, nerves to be transferred from the donor to the recipient as one unit. VCAs were added to the definition of organs covered by the Organ Procurement and Transplantation Network Final Rule and National Organ Transplant Act. Prior to harvest of the face from the donor, a tracheostomy is usually performed. The osteotomies and dissection of the midface bony skeleton may involve severe hemorrhagic blood loss often requiring transfusion of blood products...
December 24, 2016: World Journal of Transplantation
https://www.readbyqxmd.com/read/28053156/targeted-clinical-control-of-trauma-patient-coagulation-through-a-thrombin-dynamics-model
#9
Amor A Menezes, Ryan F Vilardi, Adam P Arkin, Mitchell J Cohen
We present a methodology for personalizing the clinical treatment of severely injured patients with acute traumatic coagulopathy (ATC), an endogenous biological response of impaired coagulation that occurs early after trauma and shock and that is associated with increased bleeding, morbidity, and mortality. Despite biological characterization of ATC, it is not easily or rapidly diagnosed, not always captured by slow laboratory testing, and not accurately represented by coagulation models. This lack of knowledge, combined with the inherent time pressures of trauma treatment, forces surgeons to treat ATC patients according to empirical resuscitation protocols...
January 4, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28052306/laboratory-monitoring-of-parenteral-direct-thrombin-inhibitors
#10
Elizabeth M Van Cott, A Joshua Roberts, William E Dager
Argatroban and bivalirudin are parenteral direct inhibitors of the activity of thrombin, but, unlike heparin, can inhibit both soluble as well as clot-bound thrombin. These agents do not require antithrombin as a cofactor for activity. The parenteral direct thrombin inhibitors (DTIs) can be used in a variety of settings, including heparin-induced thrombocytopenia (HIT) or an allergy to heparin, and patients requiring anticoagulation for an invasive cardiovascular intervention. Both agents have a relatively short half-life in patients without organ system failure and are typically administered by continuous infusion...
January 4, 2017: Seminars in Thrombosis and Hemostasis
https://www.readbyqxmd.com/read/28050371/haemostatic-profile-in-patients-of-myeloproliferative-neoplasms-a-tertiary-care-centre-experience
#11
Yatendra Parashar, Rashmi Kushwaha, Ashutosh Kumar, Kamal Agarwal, U S Singh, Mili Jain, S P Verma, A K Tripathi
INTRODUCTION: Patients of MPN commonly present with abnormalities in laboratory coagulation tests that are consistent with hypercoagulable state. Some individuals with MPN exhibit a pattern of exclusive bleeding or thrombotic events; many others have both bleeding and thrombosis during the course of the disease. AIM: This study was undertaken to assess the haemostatic defects and platelet functions in patients of MPN. MATERIALS AND METHODS: One year prospective study was conducted at a tertiary care centre in North India in Department of Pathology in collaboration with Department of Clinical Haematology...
November 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28050066/antiphospholipid-syndrome-a-diagnostic-challenge
#12
REVIEW
R S Mallhi, Neerja Kushwaha, T Chatterjee, J Philip
The antiphospholipid syndrome (APS) is an acquired autoimmune thrombophilic disorder that is characterized by thrombosis (venous, arterial and microvascular) and obstetric morbidity due to a diverse family of antibodies against phospholipid-binding proteins present in plasma. The term antiphospholipid antibody is actually a misnomer as the antibodies are not against the phospholipid per se, but target the plasma protein co-factors, which bind to anionic PLs. The exact etiology has not been elucidated and is multifactorial...
December 2016: Medical Journal, Armed Forces India
https://www.readbyqxmd.com/read/28045742/management-of-anticoagulation-with-rivaroxaban-in-trauma-and-acute-care-surgery-complications-and-reversal-strategies-as-compared-to-warfarin-therapy
#13
Sara P Myers, Esmaeel R Dadashzadeh, Jessica Cheung, Louis Alarcon, Matthew Kutcher, Joshua B Brown, Matthew D Neal
BACKGROUND: Rivaroxaban has gained popularity as an anticoagulant (AC) for stroke prevention in nonvalvular atrial fibrillation (afib) and venous thromboembolism (VTE). Although adverse bleeding events are associated with all AC, lack of point of care testing to measure the effect of rivaroxaban in emergent situations has contributed to perceived increased risk amongst physicians. METHODS: To describe a single center experience with trauma and emergency general surgery (EGS) patients taking rivaroxaban and evaluate outcomes compared with patients taking warfarin using a propensity score analysis...
December 31, 2016: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28044251/novel-diagnostic-and-therapeutic-frontiers-in-thrombotic-anti-phospholipid-syndrome
#14
REVIEW
Savino Sciascia, Massimo Radin, Mario Bazzan, Dario Roccatello
The anti-phospholipid syndrome (APS) is an autoimmune disorder characterized by vascular thrombosis and/or pregnancy morbidity, associated with a persistent positivity for anti-phospholipid antibodies (aPL). The current classification criteria for APS include three laboratory tests: lupus anti-coagulant (LA), anti-cardiolipin (aCL), and anti-β2 glycoprotein-I (β2GPI). To date, the therapeutic approach for thrombotic APS mainly centers on long-term anti-coagulation with a vitamin K antagonist (VKA). APS management may represent a challenge for the treating physicians...
February 2017: Internal and Emergency Medicine
https://www.readbyqxmd.com/read/28042634/anesthesia-methods-used-by-anesthetic-specialists-for-circumcision-cases-national-survey-study-for-turkey
#15
Cafer Altaş, Gamze Küçükosman, Bülent S Yurtlu, Rahşan D Okyay, Bengü G Aydın, Özcan Pişkin, Murat Çimencan, Hilal Ayoğlu, Volkan Hancı, Işıl Özkoçak-Turan
To examine the anesthesiologist's choice for anesthesia techniques and drugs in circumcision and determine the preoperative examination, intraoperative monitoring techniques, postoperative analgesia methods, and common complications among anesthesiologists working in Turkey. Methods: This cross-sectional study was conducted at Bulent Ecevit University Hospital, Zonguldak, Turkey, between May and July 2012. Survey data were obtained via survey forms through electronic data over the web. The questionnaire consists of 20 questions...
January 2017: Saudi Medical Journal
https://www.readbyqxmd.com/read/28031668/bilateral-superficial-femoral-artery-thrombosis-in-a-15-year-old-caucasian-male-with-homozygous-prothrombin-g20210a-genotype-and-associated-antiphospholipid-syndrome
#16
Uzung Yoon, LaiLai Kwok, Ingo Flessenkaemper
Prothrombin mutation was usually associated with other well-established predisposing factors for venous thrombosis such as antiphospholipid antibodies. Recently, even isolated prothrombin gene mutation G20210A has been reported to present severe or unusual vein thrombosis. Less clear is the role of prothrombin mutation in the formation of arterial thrombosis. We present a case of a 15-year-old healthy White male with acute bilateral femoral artery thrombosis. The patient presented with increasing left leg pain for about 1 week...
December 2016: International Journal of Angiology: Official Publication of the International College of Angiology, Inc
https://www.readbyqxmd.com/read/28025213/non-vitamin-k-oral-anticoagulants-and-laboratory-testing-now-and-in-the-future-views-from-a-workshop-at-the-european-medicines-agency-ema
#17
Tomas Salmonson, Jean-Michel Dogné, Heidi Janssen, Juan Garcia Burgos, Paul Blake
In contrast to vitamin K antagonists, no routine coagulation monitoring is required in patients taking non-vitamin-K oral anticoagulants (NOACs). However, dosing must take into account factors such as patient age, renal function, and accompanying haemorrhagic risk. There has been considerable debate about when laboratory measurement might be appropriate and which tests should be used. A workshop at the European Medicines Agency recently discussed the evidence about laboratory measurement from formal studies, clinical experience, and the multiple perspectives on NOAC treatment, and considered how our knowledge might be further enhanced...
January 2017: European Heart Journal. Cardiovascular Pharmacotherapy
https://www.readbyqxmd.com/read/28017497/developmental-hemostasis-a-lifespan-from-neonates-and-pregnancy-to-the-young-and-elderly-adult-in-a-european-white-population
#18
Ulrike Nowak-Göttl, Verena Limperger, Gili Kenet, Frauke Degenhardt, Roman Arlt, Justus Domschikowski, Hartmut Clausnizer, Jürgen Liebsch, Ralf Junker, Dagmar Steppat
Absolute values of reference ranges for coagulation assays in humans vary within the entire lifespan and confirm the concept of developmental hemostasis. It is known that physiologic concentrations of coagulation factors (F) gradually increase over age: they are lower in premature infants as compared to full-term babies, healthy children or adults. Here we demonstrate in a cohort of 1011 blood donors and in a group of 193 healthy pregnant women, that the process of developmental hemostasis proceeds in adults...
December 5, 2016: Blood Cells, Molecules & Diseases
https://www.readbyqxmd.com/read/27999475/pre-analytical-issues-in-the-haemostasis-laboratory-guidance-for-the-clinical-laboratories
#19
REVIEW
A Magnette, M Chatelain, B Chatelain, H Ten Cate, F Mullier
Ensuring quality has become a daily requirement in laboratories. In haemostasis, even more than in other disciplines of biology, quality is determined by a pre-analytical step that encompasses all procedures, starting with the formulation of the medical question, and includes patient preparation, sample collection, handling, transportation, processing, and storage until time of analysis. This step, based on a variety of manual activities, is the most vulnerable part of the total testing process and is a major component of the reliability and validity of results in haemostasis and constitutes the most important source of erroneous or un-interpretable results...
2016: Thrombosis Journal
https://www.readbyqxmd.com/read/27984558/the-impact-of-ledipasvir-sofosbuvir-on-hiv-positive-and-hiv-negative-japanese-hemophilia-patients-with-1-4-and-mixed-genotype-hcv
#20
Azusa Nagao, Hideji Hanabusa
INTRODUCTION: About 80% of patients with hemophilia who received non-heated coagulation factor concentrates in the early 1980s were infected with hepatitis C virus (HCV), and about 40% of them were infected with human immunodeficiency virus (HIV). AIM: We evaluated the efficacy and safety of administering ledipasvir (LDV)/sofosbuvir (SOF) to Japanese hemophilia patients. METHODS: Forty-three hemophilia patients with genotype 1 or 4 HCV were treated with LDV/SOF for 12 weeks...
December 7, 2016: Journal of Acquired Immune Deficiency Syndromes: JAIDS
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