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Coagulation monitoring

Abidelfatah M Nasser, Neta-Lee Benisti, Naomi Ofer, Sivan Hovers, Yeshayahu Nitzan
Advanced wastewater treatment processes are applied to prevent the environmental dissemination of pathogenic microorganisms. Giardia lamblia causes a severe disease called giardiasis, and is highly prevalent in untreated wastewater worldwide. Monitoring the microbial quality of wastewater effluents is usually based on testing for the levels of indicator microorganisms in the effluents. This study was conducted to compare the suitability of fecal coliforms, F+ coliphages and sulfide reducing clostridia (SRC) as indicators for the reduction of Giardia cysts in two full-scale wastewater treatment plants...
October 21, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
Dong-Eog Kim, Jeong-Yeon Kim, Su-Kyoung Lee, Ju Hee Ryu, Ick Chan Kwon, Cheol-Hee Ahn, Kwangmeyung Kim, Dawid Schellingerhout
Direct thrombus imaging visualizes the root cause of thromboembolic infarction. Being able to image thrombus directly allows far better investigation of stroke than relying on indirect measurements, and will be a potent and robust vascular research tool. We use an optical imaging approach that labels thrombi with a molecular imaging thrombus marker - a Cy5.5 near-infrared fluorescent (NIRF) probe that is covalently linked to the fibrin strands of the thrombus by the fibrin-crosslinking enzymatic action of activated coagulation factor XIIIa during the process of clot maturation...
September 25, 2016: Journal of Visualized Experiments: JoVE
Anna Ågren, Margareta Holmström, David E Schmidt, Kazuya Hosokawa, Margareta Blombäck, Paul Hjemdahl
Patients with type 3 von Willebrand disease (VWD-3) have no measurable levels of VW factor (VWF) and usually require treatment with VWF-FVIII concentrate to prevent and/or stop bleeding. Even though the patients are treated prophylactically, they may experience bleeding symptoms. The aim of this study was to evaluate the effect of VWF-FVIII concentrate treatment in VWD-3 patients with the Total Thrombus Analysis System (T-TAS(®)), which measures thrombus formation under flow conditions. Coagulation profiles of 10 VWD-3 patients were analysed using T-TAS before and 30 minutes after VWF-FVIII concentrate (Haemate(®)) injection...
October 20, 2016: Thrombosis and Haemostasis
M Clerc, J Prothet, T Rimmelé
Composite tissue allotransplantation (CTA) is a complex procedure requiring a multidisciplinary collaboration between surgeons, anesthetists, and transplantation specialists. We will describe the perioperative management of a bilateral forearm allograft performed at our facility. A 40-year-old man who lost both forearms was registered on the transplant waiting list; a suitable graft was available 11months later. Anesthesia required planning for vascular access, hemodynamic monitoring, fluid therapy management and prevention of deep vein thrombosis...
June 2016: Hand Surgery and Rehabilitation
Slawomir Gajda, Tomasz Szopiński, Andrzej B Szczepanik, Roman Sosnowski, Anna M Szczepanik
Surgery in patients with hemophilia is a serious challenge. It requires a comprehensive approach, as well as careful postoperative monitoring. We present here the first case of a transperitoneal laparoscopic radical nephrectomy (TLRN) for renal cell carcinoma, of the clear-cell type, performed in a hemophilia B patient. The level of factor IX clotting activity before surgery and on postoperative days 1-6 was maintained at 65-130% and at 30-40% on subsequent days until healing of the post-operative wound was achieved...
2016: Central European Journal of Urology
C Raspé, L Flöther, R Schneider, M Bucher, P Piso
Due to the significantly improved outcome and quality of life of patients with different tumor entities after cytoreductive surgery (CRS) and HIPEC, there is an increasing number of centers performing CRS and HIPEC procedures. As this procedure is technically challenging with potential high morbidity and mortality, respectively, institutional experience also in the anesthetic and intensive care departments is essential for optimal treatment and prevention of adverse events. Clinical pathways have to be developed to achieve also good results in more comorbid patients with border line indications and extensive surgical procedures...
September 28, 2016: European Journal of Surgical Oncology
S Louw, N P Saragas, P N Ferrao, T F Chirwa, B F Jacobson
BACKGROUND: Low-molecular-weight heparin and vitamin K antagonists such as warfarin are the gold standard for prohylaxis and treatment of venous thromboembolic disease (VTED). Direct oral anticoagulants (DOACs) result in predictable anticoagulation with significantly reduced inter- and intra-patient variability. DOAC absorption is rapid, with a short half-life and relatively few drug interactions. DOACs are effective and safe at fixed doses without activity monitoring. However, specific situations may require assessment of accurate drug activity...
September 8, 2016: South African Medical Journal, Suid-Afrikaanse Tydskrif Vir Geneeskunde
Fuat H Saner, Carmen Kirchner
BACKGROUND: Patients with end-stage liver disease (ESLD) are assumed to be at high risk of bleeding when undergoing any kind of invasive intervention (any kind of operation, including transplantation or minimally invasive interventions). Both bleeding and thrombosis are associated with a poor outcome. METHODS: A selective literature research was conducted with the following key words: 'cirrhosis', 'coagulation', 'bleeding', 'INR' (international normalized ratio), 'aPTT' (activated partial thromboplastin time), and 'thrombocytopenia'...
August 2016: Visc Med
L Chow, A Carr, L MacKenzie, A Walker, D Archer, A Lee
BACKGROUND: Dalteparin is often used for prophylaxis or treatment of venous thromboembolism during pregnancy, yet there is no laboratory test to accurately reflect its clinical activity. Thromboelastography is a point-of-care monitor of whole blood coagulation. The aim of this study was to determine if serial doses of dalteparin added in vitro to whole blood samples from term, pregnant women are detectable as changes in thromboelastography parameters. METHODS: Thirty healthy parturients presenting for elective caesarean section were recruited...
September 1, 2016: International Journal of Obstetric Anesthesia
D A Robinson, J Duay, A M Kondajji, K J Stevenson
Here we investigate the mechanistic aspects of Pt nanoparticle (NP) aggregation in solutions typically used for detecting NP/electrode impacts by electrocatalytic amplification (ECA). We previously proposed a general mechanism for Pt colloid destabilization that involved the participation of both the hydrazine redox probe and the pH buffer species as coagulants. Herein the Pt NP coagulation and aggregation mechanisms were further investigated with microscopic kinetic NP concentration monitoring and zeta potential measurements using nanoparticle tracking analysis (NTA), as well as open circuit potential experiments with a citrate-treated polycrystalline Pt surface to assess electrical double layer potential...
September 15, 2016: Faraday Discussions
Yongjun Liu, Jing Liu, Aining Zhang, Zhe Liu
The removal effects of main toxic organic pollutants in semi-coking wastewater by combined treatment process were investigated, while the genotoxicity relevance of wastewater from different treatment units were monitored by using Vicia faba bioassays. Results showed that 37 kinds of toxic organic pollutants were detected in the crude sewage, most of them were removed by physicochemical pretreatment, and the total concentration of organic pollutants decreased from 4826 mg L(-1) to 546 mg L(-1). After pretreatment, benzenes, phenols, quinolines and indoles in the wastewater were mainly removed by anaerobic/aerobic biodegradation, but the polycyclic aromatic hydrocarbons (PAHs) were removed mainly by advanced treatment, total concentration of toxic organic pollutants was lower than 0...
October 1, 2016: Environmental Pollution
Paul A Reilly, Joanne van Ryn, Oliver Grottke, Stephan Glund, Joachim Stangier
The direct oral anticoagulants (DOACs) provide a number of clinical advantages over vitamin K antagonists for the treatment of thromboembolism, including improved efficacy and safety, as well as no need for regular monitoring of anticoagulant effect. However, as with all anticoagulants, bleeding complications may occur, and anticoagulant reversal may be required in specific clinical situations, such as in patients experiencing spontaneous or traumatic bleeds, or in anticoagulated patients requiring emergency surgery or other invasive procedures...
September 28, 2016: American Journal of Emergency Medicine
P Larsson, I Alwis, B Niego, M Sashindranath, P Fogelstrand, M C L Wu, L Glise, M Magnusson, M Daglas, N Bergh, S P Jackson, R L Medcalf, S Jern
BACKGROUND: The endogenous fibrinolytic system has rarely been considered as a target to prevent thrombotic disease. Tissue plasminogen activator (t-PA) is potently increased by histone deacetylase (HDAC) inhibitors in endothelial cells in vitro, but whether this translates into increased vascular t-PA production and an enhanced fibrinolytic capacity in vivo is unknown. OBJECTIVES: The aim of this study was to determine if the HDAC inhibitor valproic acid (VPA) stimulates production of t-PA in the vasculature of mice, and further, if VPA pre-treatment affects fibrin deposition and clot formation after mechanical vessel injury...
October 5, 2016: Journal of Thrombosis and Haemostasis: JTH
Z C Li, H J Fu, Z M Wang, S Yang, H Z Xu
In this study, we investigated the correlation between the JAK2V617F mutation and thrombosis in patients with myeloproliferative neoplasm (MPN) using real-time fluorescence quantitative PCR. The incidence of thrombus was monitored and blood and coagulation were routinely assayed in patients with MPN. The JAK2V617F mutation was found in 8/68 individuals in the control group (11.8%); it was expressed in 44/68 patients with MPN (64.7%), suggesting that the rate of this mutation was significantly higher in patients with MPN than that in the control group...
August 29, 2016: Genetics and Molecular Research: GMR
Jean Amiral, Claire Dunois, Cédric Amiral, Jerard Seghatchian
In the past decade Direct Oral Anti-Coagulants (DOACs), targeting Thrombin or Factor Xa, have enormously facilitated the daily treatment of all relevant patients, including those requiring lifelong therapy. These DOACs have considerable advantages over the use of oral Vitamin K Antagonist (VKA) treatments, in view of having little interferences with food and other medications and also not requiring adjustment for age, gender or weight, with some well-defined exceptions. In this current What's Happening Section we focus on measurements of DiXaIs in plasma using anti-Xa assays, with the objective of providing a tribute to Professor Michel Meyer Samama, who was not only a real leader in this field but, in the past, both authors benefited from his wisdom, as a teacher who dedicated his scientific and professional life (among many other interests in hemostasis, thrombosis and fibrinolysis) to develop and promote methods and strategies for laboratory monitoring of anticoagulants...
October 2016: Transfusion and Apheresis Science
Moniek P M de Maat, Marianne van Schie, Cornelis Kluft, Frank W G Leebeek, Piet Meijer
BACKGROUND: Levels of hemostasis factors vary between and within individuals as a result of genetic and environmental factors and analytical variation of the assays. The current state of the art for defining analytical precision requirements for analytical testing is based on this between- and within-individual (biological) variation. However, information on biological variation in hemostasis variables is still limited.The aim of this study was to determine the biological variation of coagulation variables involved in thrombosis and bleeding to provide a recommendation for performance specifications and to assess whether hemostasis assays fulfill the recommendation...
September 27, 2016: Clinical Chemistry
Ansheng Mo, Zhihu Tao, Zhiqiang Feng, Xiaoping Yang, Jun Wu
Patients with end-stage renal disease have a higher risk of morbidity and mortality than those without end-stage renal disease in cardiovascular surgery. Poor outcomes are especially found in patients who undergo valve surgery. We report successful mitral valve replacement (MVR) in a dialysis-dependent patient. The patient recovered well at postoperation and had the complication of anticoagulation at follow-up. Based on this successful case, we believe that myocardial protection, prevention of infection, nutritional support, and close monitoring of blood coagulation function are important in dialysis-dependent patients undergoing valve replacement...
August 2016: Annals of Translational Medicine
Karen S Brown, Hamim Zahir, Michael A Grosso, Hans J Lanz, Michele F Mercuri, Jerrold H Levy
BACKGROUND: Four nonvitamin K antagonist oral anticoagulants (NOACs) are approved for the prevention of stroke in patients with nonvalvular atrial fibrillation and for the treatment of venous thromboembolism. These include the direct thrombin inhibitor dabigatran and the direct factor Xa inhibitors rivaroxaban, apixaban, and edoxaban. Bleeding is a complication for all anticoagulants and concerns regarding bleeding risk and the suitability of effective reversal strategies may be a barrier to their prescription...
September 23, 2016: Critical Care: the Official Journal of the Critical Care Forum
Asrar Ahmad, Monica Kohli, Anita Malik, Megha Kohli, Jaishri Bogra, Haider Abbas, Rajni Gupta, B B Kushwaha
PURPOSE: In this study, we aimed to correlate thromboelastography (TEG) variables versus conventional coagulation profile in all patients presenting with pre-eclampsia/eclampsia and to see whether TEG would be helpful for evaluating coagulation in parturients before regional anaesthesia. MATERIALS AND METHODS: This was a prospective study on 100 pre-eclampsia/eclampsia patients undergoing lower-segment caesarean section under regional anaesthesia. Two blood samples were collected...
October 2016: Journal of Obstetrics and Gynaecology of India
Zheng-Li Wang, Li-Zhong Du, Yi-Yu Chen, Lu-Quan Li, Qi Lu, Ying Liu, Lu-Ying Cao, Yu He, Jia-Lin Yu
BACKGROUND: Critical value reporting has been widely adopted by hospitals throughout the world, but there were few reports about neonatal critical values. This study aimed to analyze characteristics of the neonatal critical values considered at our center and to provide information on improving neonatal intensive care. METHODS: A retrospective study of critical values at a newborn tertiary center in China was conducted to assess neonatal critical values according to test, distribution, reporting time, patient outcome and the impact to the therapy...
September 20, 2016: World Journal of Pediatrics: WJP
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