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https://www.readbyqxmd.com/read/28437748/rational-and-timely-haemostatic-interventions-following-cardiac-surgery-coagulation-factor-concentrates-or-blood-bank-products
#1
Mariann Tang, Christian Fenger-Eriksen, Per Wierup, Jacob Greisen, Jørgen Ingerslev, Vibeke Hjortdal, Benny Sørensen
BACKGROUND: Cardiac surgery may cause a serious coagulopathy leading to increased risk of bleeding and transfusion demands. Blood bank products are commonly first line haemostatic intervention, but has been associated with hazardous side effect. Coagulation factor concentrates may be a more efficient, predictable, and potentially a safer treatment, although prospective clinical trials are needed to further explore these hypotheses. This study investigated the haemostatic potential of ex vivo supplementation of coagulation factor concentrates versus blood bank products on blood samples drawn from patients undergoing cardiac surgery...
April 5, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/28437457/tissue-factor-dependent-coagulation-activation-by-heme-a-thromboelastometry-study
#2
Gleice Regina de Souza, Bidossessi Wilfried Hounkpe, Maiara Marx Luz Fiusa, Marina Pereira Colella, Joyce M Annichino-Bizzacchi, Fabiola Traina, Fernando Ferreira Costa, Erich Vinicius De Paula
Heme has been characterized as potent trigger of inflammation. In hemostasis, although heme has been shown to both induce and inhibit different compartments of hemostasis, its net effect on the hemostatic balance, and the biological relevance of these effects remain to be determined. Herein we evaluated the effect of heme on hemostasis using a global assay able to generate clinically relevant data in several other complex hemostatic diseases. Citrated whole blood samples from healthy participants were stimulated by heme or vehicle and incubated for 4h at 37°C...
2017: PloS One
https://www.readbyqxmd.com/read/28437133/the-impact-of-the-centrifuge-characteristics-and-centrifugation-protocols-on-the-cells-growth-factors-and-fibrin-architecture-of-a-leukocyte-and-platelet-rich-fibrin-l-prf-clot-and-membrane
#3
David M Dohan Ehrenfest, Nelson R Pinto, Andrea Pereda, Paula Jiménez, Marco Del Corso, Byung-Soo Kang, Mauricio Nally, Nicole Lanata, Hom-Lay Wang, Marc Quirynen
L-PRF (leukocyte- and platelet-rich fibrin) is one of the four families of platelet concentrates for surgical use and is widely used in oral and maxillofacial regenerative therapies. The first objective of this article was to evaluate the mechanical vibrations appearing during centrifugation in four models of commercially available table-top centrifuges used to produce L-PRF and the impact of the centrifuge characteristics on the cell and fibrin architecture of a L-PRF clot and membrane. The second objective of this article was to evaluate how changing some parameters of the L-PRF protocol may influence its biological signature, independently from the characteristics of the centrifuge...
April 24, 2017: Platelets
https://www.readbyqxmd.com/read/28435372/histologic-evaluation-of-the-effect-of-mineral-trioxide-aggregate-fillapex-as-a-root-canal-sealer-in-rat-teeth-submitted-to-late-replantation
#4
Manuel Marques Ferreira, Maria Filomena Botelho, Margarida Abrantes, Lina Carvalho, Eunice Carrilho
OBJECTIVE: This study aims to analyze the effect of new root canal based silicate cement, in rat teeth after late replantation, comparing with calcium hydroxide (CH) in preventing tooth root resorption. MATERIALS AND METHODS: The study group included 16 Wistar rats in which the upper right central incisors were extracted and were left on a worktable for 60 min, simulating a case of tooth avulsion, after had been anesthetized. One group, (Group I), the canals were filled with CH past, before replantation...
January 2017: European Journal of Dentistry
https://www.readbyqxmd.com/read/28435120/the-role-of-platelets-in-hemostasis-and-the-effects-of-snake-venom-toxins-on-platelet-function
#5
REVIEW
Mayara Ribeiro de Queiroz, Bruna Barbosa de Sousa, Déborah Fernanda da Cunha Pereira, Carla Cristine Neves Mamede, Mariana Santos Matias, Nadia Cristina Gomes de Morais, Júnia de Oliveira Costa, Fábio de Oliveira
The human body has a set of physiological processes, known as hemostasis, which keeps the blood fluid and free of clots in normal vessels; in the case of vascular injury, this process induces the local formation of a hemostatic plug, preventing hemorrhage. The hemostatic system in humans presents complex physiological interactions that involve platelets, plasma proteins, endothelial and subendothelial structures. Disequilibrium in the regulatory mechanisms that control the growth and the size of the thrombus is one of the factors that favors the development of diseases related to vascular disorders such as myocardial infarction and stroke, which are among the leading causes of death in the western world...
April 20, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/28433556/bolus-injections-of-novel-thrombogenic-site-targeted-fusion-proteins-comprising-annexin-v-and-kunitz-protease-inhibitors-attenuate-intimal-hyperplasia-after-balloon-angioplasty
#6
Yung-Hsin Yeh, Shang-Hung Chang, Shin-Yu Chen, Chih-Jen Wen, Fu-Chan Wei, Rui Tang, Sam Achilefu, Tze-Chein Wun, Wei-Jan Chen
BACKGROUND: Systemic administrations of conventional antithrombotics reduce neointima formation after angioplasty in experimental animals. However, clinical translation of these results has not been successful due to high risk for bleeding. OBJECTIVES: We sought to determine whether novel annexin-V (ANV)-Kunitz protease inhibitor fusion proteins, TAP-ANV and ANV-6L15, can specifically target to vascular injury site and limit neointima formation without inducing systemic hypo-coagulation in a rat carotid artery balloon angioplasty injury model...
April 6, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28432428/tranexamic-acid-for-treatment-and-prophylaxis-of-bleeding-and-hyperfibrinolysis
#7
Ingrid Pabinger, Dietmar Fries, Herbert Schöchl, Werner Streif, Wolfgang Toller
Uncontrolled massive bleeding with subsequent derangement of the coagulation system is a major challenge in the management of both surgical and seriously injured patients. Under physiological conditions activators and inhibitors of coagulation regulate the sensitive balance between clot formation and fibrinolysis. In some cases, excessive and diffuse bleeding is caused by systemic activation of fibrinolysis, i. e. hyperfibrinolysis (HF). Uncontrolled HF is associated with a high mortality. Polytrauma patients and those undergoing surgical procedures involving organs rich in plasminogen proactivators (e...
April 21, 2017: Wiener Klinische Wochenschrift
https://www.readbyqxmd.com/read/28431614/permeability-surface-area-product-analysis-in-malignant-brain-edema-prediction-a-pilot-study
#8
O Volny, P Cimflova, T-Y Lee, B K Menon, C D d'Esterre
BACKGROUND AND PURPOSE: Using an extended CT perfusion acquisition (150s), we sought to determine the association between perfusion parameters and malignant edema after ischemic stroke. METHODS: Patients (from prospective study PROVE-IT, NCT02184936) with terminal internal carotid artery±proximal middle cerebral occlusion were involved. CTA was assessed for clot location and status of leptomeningeal collaterals. The following CTP parameters were calculated within the ischemic territory and contralaterally: permeability surface area product (PS), cerebral blood flow (CBF) and cerebral blood volume (CBV)...
May 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28430966/decreased-thromboembolic-stroke-but-not-atherosclerosis-or-vascular-remodeling-in-mice-with-rock2-deficient-platelets
#9
Nikola Sladojevic, Goo Taeg Oh, Hyung-Hwan Kim, Lea M Beaulieu, Hervé Falet, Karol Kaminski, Jane E Freedman, James K Liao
Aims: Rho-associated coiled-coil containing kinase (ROCK)-2 is an important mediator of the actin cytoskeleton. Because changes in the actin cytoskeleton are critical for platelet function, we hypothesized that ROCK2 in platelets will play important role in thrombosis and can be potentially a target for therapeutic intervention in thromboembolic stroke. Methods and Results: We generated platelet-specific ROCK2-deficient mice (ROCK2 Plt-/- ) from conditional ROCK2 fl°x/fl°x and platelet factor (PF)-4-Cre transgenic mice...
April 14, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28429819/effects-of-dielectrophoresis-on-thrombogenesis-in-human-whole-blood
#10
Steven Kinio, James Mills
Thrombogenesis (blood clot formation) is a major barrier to the development of biomedical devices that interface with blood. Although state-of-the-art chemically and pharmacologically mediated clot mitigation strategies are effective, some limitations of such approaches include depletion of active agents, or adverse reactions in patients. Increased clotting protein adsorption and platelet adhesion, which occurs when artificial surfaces are exposed to blood, results in enhanced clot formation on artificial surfaces...
April 21, 2017: Electrophoresis
https://www.readbyqxmd.com/read/28429138/prothrombotic-state-in-asthma-is-related-to-increased-levels-of-inflammatory-cytokines-il-6-and-tnf%C3%AE-in-peripheral-blood
#11
Stanislawa Bazan-Socha, Lucyna Mastalerz, Agnieszka Cybulska, Lech Zareba, Romy Kremers, Michal Zabczyk, Grazyna Pulka, Teresa Iwaniec, Coenraad Hemker, Anetta Undas
Recently, we have reported that asthma is associated with enhanced plasma thrombin formation and impaired fibrinolysis. The mechanisms underlying the prothrombotic state in this disease are unknown. Our aim was to investigate whether prothrombotic alterations in asthmatics are associated with inflammation. We studied 164 adult, white, stable asthmatics and 72 controls matched for age, sex, body mass index (BMI), and smoking. Plasma tumor necrosis factor α (TNFα), interleukin (IL)-6, and serum periostin were evaluated using ELISAs, and their associations with thrombin generation, fibrinolytic capacity, expressed as clot lysis time (CLT), and platelet markers were later analyzed...
April 20, 2017: Inflammation
https://www.readbyqxmd.com/read/28428867/adaptative-evolution-of-the-vkorc1-gene-in-mus-musculus-domesticus-is-influenced-by-the-selective-pressure-of-anticoagulant-rodenticides
#12
Joffrey Goulois, Véronique Lambert, Lionel Legros, Etienne Benoit, Virginie Lattard
Anticoagulant rodenticides are commonly used to control rodent pests worldwide. They specifically inhibit the vitamin K epoxide reductase (VKORC1), which is an enzyme encoded by the Vkorc1 gene, involved in the recycling of vitamin K. Therefore, they prevent blood clotting. Numerous mutations of Vkorc1 gene were reported in rodents, and some are involved in the resistant to rodenticides phenotype. Two hundred and sixty-six mice tails were received from 65 different locations in France. Coding sequences of Vkorc1 gene were sequenced in order to detect mutations...
April 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28427001/emergency-room-thoracotomy-for-acute-traumatic-cardiac-tamponade-caused-by-a-blunt-cardiac-injury-a-case-report
#13
Kenichiro Ishida, Yoshihiro Kinoshita, Nobutaka Iwasa, Masaro Nakae, Masayuki Sakaki, Yohei Ieki, Kyosuke Takahashi, Yumiko Shimahara, Taku Sogabe, Keiichiro Shimono, Mitsuhiro Noborio, Daikai Sadamitsu
INTRODUCTION: Traumatic blunt cardiac injuries have a high mortality rate, and prompt diagnosis and treatment can be lifesaving in cardiac tamponade. PRESENTATION OF CASE: A 62-year-old man was transferred to the emergency department after a motor vehicle accident. He was hemodynamically unstable. A focused assessment with sonography in trauma (FAST) showed pericardial fluid with right ventricular collapse consistent with cardiac tamponade in the subxiphoid view...
April 5, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28422911/do-vented-chest-seals-differ-in-efficacy-an-experimental-evaluation-using-a-swine-hemopneumothorax-model
#14
Bijan S Kheirabadi, Irasema B Terrazas, Nahir Miranda, Spc Amber N Voelker, Francoise Arnaud, Harold G Klemcke, Frank F Butler, Michael A Dubick
OBJECTIVE: Hemopneumothorax (HPTX) is the second leading cause of potentially preventable death among combat casualties. We investigated the ability of five FDA-approved non-occlusive chest seals (CSs) to seal a bleeding chest wound and prevent tension HPTX in a swine model. METHODS: Following instrumentation, an open chest wound was created in the left thorax of spontaneously air-breathing anesthetized pigs (n=26, 43 Kg). Autologous fresh blood (226 mL) was then infused into the pleural cavity to produce HPTX...
April 18, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28421955/further-evidence-that-taking-statins-can-reduce-risk-of-blood-clots
#15
(no author information available yet)
More evidence has come to light that seems to suggest statins could significantly reduce the occurrence of blood clots in certain parts of the body.
April 19, 2017: Nursing Standard
https://www.readbyqxmd.com/read/28421636/leveraging-cell-type-specific-regulatory-regions-to-detect-snps-associated-with-tissue-factor-pathway-inhibitor-plasma-levels
#16
Jessica Dennis, Alejandra Medina-Rivera, Vinh Truong, Lina Antounians, Nora Zwingerman, Giovana Carrasco, Lisa Strug, Phil Wells, David-Alexandre Trégouët, Pierre-Emmanuel Morange, Michael D Wilson, France Gagnon
Tissue factor pathway inhibitor (TFPI) regulates the formation of intravascular blood clots, which manifest clinically as ischemic heart disease, ischemic stroke, and venous thromboembolism (VTE). TFPI plasma levels are heritable, but the genetics underlying TFPI plasma level variability are poorly understood. Herein we report the first genome-wide association scan (GWAS) of TFPI plasma levels, conducted in 251 individuals from five extended French-Canadian Families ascertained on VTE. To improve discovery, we also applied a hypothesis-driven (HD) GWAS approach that prioritized single nucleotide polymorphisms (SNPs) in (1) hemostasis pathway genes, and (2) vascular endothelial cell (EC) regulatory regions, which are among the highest expressers of TFPI...
April 18, 2017: Genetic Epidemiology
https://www.readbyqxmd.com/read/28419762/hobnail-variant-of-papillary-thyroid-carcinoma-a-case-with-an-unusual-presentation
#17
Mohammed T Lilo, Justin A Bishop, Syed Z Ali
Variants of papillary thyroid carcinoma (PTC) account for up to 25% of the cases, some of which are proven to be associated with aggressive clinical behavior such as tall cell and columnar cell variants. Hobnail variant of PTC (HVPTC) is recently described as a rare and aggressive variant of PTC. Herein, we are reporting a case of HVPTC in a patient who presented with hemoptysis and an intratracheal blood clot that was aspirated and submitted for cytopathological examination. Cytomorphology displayed neoplastic cells with profound micropapillary architecture, elongated nuclei, and prominent hobnail configuration...
April 16, 2017: Diagnostic Cytopathology
https://www.readbyqxmd.com/read/28419012/a-novel-needle-free-blood-draw-device-for-sample-collection-from-short-peripheral-catheters
#18
Caprice Cadacio, Irving Nachamkin
A new US Food and Drug Administration-cleared needleless blood collection device (PIVO; Velano Vascular, San Francisco, CA) for short peripheral catheters was compared with conventional venipuncture for collecting blood samples for routine laboratory analysis from adult healthy volunteers. The PIVO device was comparable with venipuncture in terms of providing high-integrity samples (no hemolysis or clotting), equivalent laboratory values, and better patient experience as assessed by pain scores. Further studies to assess the overall utility of the PIVO device are warranted...
May 2017: Journal of Infusion Nursing: the Official Publication of the Infusion Nurses Society
https://www.readbyqxmd.com/read/28418614/efficacy-and-safety-of-low-dose-heparin-in-hemodialysis
#19
Mariana Murea, Gregory B Russell, Pirouz Daeihagh, Anita M Saran, Karan Pandya, Mark Cabrera, John M Burkart, Barry I Freedman
INTRODUCTION: The dose of unfractionated heparin (UFH) administered during hemodialysis (HD) varies widely. This prospective study evaluated the safety and efficacy of UFH dose de-escalation. METHODS: Sixty-six prevalent patients on HD receiving UFH per standard-dose protocol (load dose [LD] 50-75 units/kg, maintenance dose [MD] 500-1000 units/hour) had heparin prescription converted to low-dose protocol (start LD 15 units/kg and MD 500 units/hour; dose adjusted in small increments based on assessments of extracorporeal blood circuit)...
April 18, 2017: Hemodialysis International
https://www.readbyqxmd.com/read/28416347/blood-collection-vials-and-clinically-used-intravenous-fluids-contain-significant-amounts-of-nitrite
#20
Luis E F Almeida, Sayuri Kamimura, Margaret Y Nettleton, Celia M de Souza Batista, Elizabeth Walek, Alfia Khaibullina, Li Wang, Zenaide M N Quezado
The biology of the inorganic anion nitrite is linked to nitric oxide (NO) as nitrite can be reduced to NO and mediate its biological activities. Thus, studies of nitrite biology require sensitive and selective chemical assays. The acetic and ascorbic acids method is selective for nitrite and measures it in biological matrices. However, one of the pitfalls of nitrite measurements is its ubiquitous presence in sample collection tubes. Here, we showed high levels of nitrite in collection tubes containing EDTA, sodium citrate or sodium heparin and smaller amounts in tubes containing lithium heparin or serum clot activator...
April 14, 2017: Free Radical Biology & Medicine
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