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Clotting factors

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https://www.readbyqxmd.com/read/28338025/preventing-perioperative-bleeding-in-patients-with-inherited-bleeding-disorders
#1
Colin Watterson, Nicholas Beacher
Data sourcesCochrane Cystic Fibrosis and Genetic Disorders Group's Coagulopathies Trials Register, a regularly updated database informed by trials identified within electronic databases including MEDLINE. Further defined searches were undertaken in PubMed, Embase, The Cochrane Library, ClinicalTrials.gov and WHO International Clinical Trials Registry Platform. Additional hand searching of relevant journals and books of conference proceedings was undertaken.Study selectionRandomised and quasi-randomised controlled trials in people of all ages with haemophilia or VWD undergoing oral or dental procedures using antifibrinolytic agents (tranexamic acid (TXA) or epsilon aminocaproic acid (EACA)) to prevent perioperative bleeding compared to no intervention with or without placebo...
March 2017: Evidence-based Dentistry
https://www.readbyqxmd.com/read/28335637/reversing-the-anticoagulation-effects-of-dabigatran
#2
William E Dager, Linda Banares
The standard of care for oral anticoagulation therapy has primarily been warfarin, which is limited by its indirect mechanism-of-action, variable kinetics, tolerability, and routine monitoring concerns. The direct-acting oral anticoagulants (DOACs) have predictable pharmacokinetics and pharmacodynamics, and improved safety and efficacy compared to warfarin for the prevention of stroke in patients with nonvalvular atrial fibrillation and prevention or management of venous thromboembolism. Consequential bleeding is a concern with all anticoagulants...
March 24, 2017: Hospital Practice (Minneapolis)
https://www.readbyqxmd.com/read/28335525/the-history-of-clotting-factor-concentrates-pharmacokinetics
#3
REVIEW
Massimo Morfini
Clotting factor concentrates (CFCs) underwent tremendous modifications during the last forty years. Plasma-derived concentrates made the replacement therapy feasible not only in the hospital but also at patients' home by on-demand or prophylactic regimen. Virucidal methods, implemented soon after hepatitis and AIDS outbreak, and purification by Mabs made the plasma-derived concentrates safer and purer. CFCs were considered equivalent to the other drugs and general rules and methods of pharmacokinetics (PK) were applied to their study...
March 20, 2017: Journal of Clinical Medicine
https://www.readbyqxmd.com/read/28331929/confirmation-of-longer-fix-activity-half-life-with-prolonged-sample-collection-after-single-doses-of-nonacog-alfa-in-patients-with-haemophilia-b
#4
Baolai Hua, Runhui Wu, FeiFei Sun, Binyu Luo, Christine Alvey, Robert Labadie, Peng Roger Qu, Joan M Korth-Bradley, Pablo Rendo
A multicentre, single-dose study enrolled 12 previously treated patients with moderately severe to severe (factor IX [FIX] levels ≤2 IU/dl) haemophilia B to assess FIX pharmacokinetics after nonacog alfa administration and to evaluate the impact of length of sampling time on half-life (t½). After refraining from FIX replacement for four days, patients received 50 IU/kg as an intravenous (IV) infusion over 10 minutes. Blood samples were collected predose and 0.25, 0.5, 1, 3, 6, 9, 24, 50, 72, and 96 h post dose...
March 23, 2017: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/28328588/extreme-plasma-dilution-decreases-heparin-and-protamine-cardiopulmonary-bypass-requirements-a-case-report-on-a-jehovah-s-witness-patient
#5
Emilie Chang, Jason W Gatling, Scott Bode, Paul C Herrmann, Brian S Bull, Richard L Applegate
The primary focus of cardiopulmonary bypass management in Jehovah's Witness patients is the need to conserve blood. A consequence of these strategies inevitably results in hemodilution that is frequently extreme enough to dilute clotting factors and potentially impair coagulation. The purpose of this case report is to demonstrate that a hemodiluted patient requires less heparin to sustain anticoagulation and less protamine to reverse heparin at cardiopulmonary bypass termination. Patient harm may ensue unless the effects of extreme hemodilution are recognized...
March 15, 2017: A & A Case Reports
https://www.readbyqxmd.com/read/28328243/factors-associated-with-bleeding-and-thrombosis-in-children-receiving-extracorporeal-membrane-oxygenation-ecmo
#6
Heidi J Dalton, Ron Reeder, Pamela Garcia-Filion, Richard Holubkov, Robert A Berg, Athena Zuppa, Frank W Moler, Thomas Shanley, Murray M Pollack, Christopher Newth, John Berger, David Wessel, Joseph Carcillo, Michael Bell, Sabrina Heidemann, Kathleen L Meert, Richard Harrison, Allan Doctor, Robert F Tamburro, J Michael Dean, Tammara Jenkins, Carol Nicholson
RATIONALE: Extracorporeal membrane oxygenation (ECMO) is employed for respiratory and cardiac failure in children but is complicated by bleeding and thrombosis. OBJECTIVES: (1) Measure the incidence of bleeding (blood loss requiring transfusion or intracranial hemorrhage) and thrombosis during ECMO support; (2) identify factors associated with these complications; and (3) determine the impact of these complications on patient outcome. METHODS: Prospective, observational cohort study in pediatric, cardiac, and neonatal intensive care units in eight hospitals from December 2012 to September 2014...
March 22, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28326488/is-lmwh-sufficient-for-anticoagulant-prophylaxis-in-bariatric-surgery-prospective-study
#7
Farraj Moaad, Bramnik Zakhar, Kvasha Anton, Merie Moner, Sbeit Wisam, Farraj Safy, Waksman Igor
BACKGROUND: The objective of this study was to evaluate the coagulation profile by thromboelastography in morbidly obese patients who undergo bariatric surgery. Morbid obesity entails increased risk for thromboembolic events. There is no clear protocol for thromboembolic prophylaxis, regarding timing and length of treatment, in bariatric surgery. Thromboelastography provides data on a coagulation process from creation of the clot until the fibrinolysis. METHODS: Ninety-three morbidly obese patients were prospectively recruited within a 2-year period...
March 22, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/28323357/characterisation-of-clotting-factors-anticoagulant-protein-activities-and-viscoelastic-analysis-in-healthy-donkeys
#8
A Perez-Ecija, F J Mendoza
BACKGROUND: Studies have demonstrated differences in commonly measured hemostatic parameters between donkeys and horses. Whether clotting factors, anticoagulant protein activities and thromboelastography parameters also differ between species is still unknown. OBJECTIVES: To characterize hemostatic parameters in healthy donkeys and compare them to those of horses. STUDY DESIGN: Cross-sectional study. METHODS: Clotting Factors (V, VII, VIII, IX, X, XI and XII), and antithrombin III, Protein C and Protein S activities were measured in 80 healthy Andalusian and crossbred donkeys and 40 healthy Andalusian crossbred horses with assays based on human deficient plasmas...
March 21, 2017: Equine Veterinary Journal
https://www.readbyqxmd.com/read/28321408/novel-sequential-screening-and-enhanced-production-of-fibrinolytic-enzyme-by-bacillus-sp-ind12-using-response-surface-methodology-in-solid-state-fermentation
#9
Ponnuswamy Vijayaraghavan, P Rajendran, Samuel Gnana Prakash Vincent, Arumugaperumal Arun, Naif Abdullah Al-Dhabi, Mariadhas Valan Arasu, Oh Young Kwon, Young Ock Kim
Fibrinolytic enzymes have wide applications in clinical and waste treatment. Bacterial isolates were screened for fibrinolytic enzyme producing ability by skimmed milk agar plate using bromocresol green dye, fibrin plate method, zymography analysis, and goat blood clot lysis. After these sequential screenings, Bacillus sp. IND12 was selected for fibrinolytic enzyme production. Bacillus sp. IND12 effectively used cow dung for its growth and enzyme production (687 ± 6.5 U/g substrate). Further, the optimum bioprocess parameters were found out for maximum fibrinolytic enzyme production using cow dung as a low cost substrate under solid-state fermentation...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28318109/agreement-between-factor-xiii-activity-and-antigen-assays-in-measurement-of-factor-xiii-a-french-multicenter-study-of-147-human-plasma-samples
#10
C Caron, R Meley, V Le Cam Duchez, M F Aillaud, C Lavenu-Bombled, F Dutrillaux, C Flaujac, A Ryman, C Ternisien, D Lasne, H Galinat, C Pouplard
INTRODUCTION: Factor XIII (FXIII) deficiency is a rare hemorrhagic disorder whose early diagnosis is crucial for appropriate treatment and prophylactic supplementation in cases of severe deficiency. International guidelines recommend a quantitative FXIII activity assay as first-line screening test. FXIII antigen measurement may be performed to establish the subtype of FXIII deficiency (FXIIID) when activity is decreased. METHODS: The aim of this multicenter study was to evaluate the analytical and diagnostic levels of performance of a new latex immunoassay, K-Assay(®) FXIII reagent from Stago, for first-line measurement of FXIII antigen...
March 20, 2017: International Journal of Laboratory Hematology
https://www.readbyqxmd.com/read/28316438/factors-affecting-the-quality-of-cryoprecipitate
#11
Rajeswari Subramaniyan, Neelam Marwaha, Ashish Jain, Jasmina Ahluwalia
BACKGROUND: Many variables affect the quality of cryoprecipitate (CRYO). We investigated the effect of freezing techniques and ABO blood groups on the quality of CRYO with respect to factor VIII: C and fibrinogen levels. MATERIALS AND METHODS: Ninety-six whole blood units each collected from in-house (Group I) and blood donation camps outside the hospital premises (Group II) were processed for CRYO preparation. Within each group, half the number of plasma units was frozen using blast freezer and another half using the conventional freezer...
January 2017: Asian Journal of Transfusion Science
https://www.readbyqxmd.com/read/28314985/the-role-of-new-oral-anticoagulants-in-orthopaedics-an-update-of-recent-evidence
#12
REVIEW
Dimitrios V Papadopoulos, Ioannis Kostas-Agnantis, Ioannis Gkiatas, Andreas G Tsantes, Panagiota Ziara, Anastasios V Korompilias
Rivaroxaban, dabigatran, apixaban and edoxaban are the four available new oral anticoagulants (NOAC) which are currently approved for venous thromboembolism prophylaxis after total hip and knee replacement. Large phase 3 and phase 4 studies comparing NOAC with low molecular weight heparins have shown similar results regarding the efficacy and safety of these two categories of anticoagulants. Management of bleeding complications is a matter of great significance. Three reversal agents have been developed: idarucizumab, andexanet alfa and ciraparantag...
March 17, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/28314697/demeanor-of-rivaroxaban-in-activated-inactivated-fxa
#13
Kaname Seki, Yosuke Mizuno, Toku Sakashita, Shintaro Nakano, Jun Tanno, Yasushi Okazaki, Toshihiro Muramatsu, Shigeyuki Nishimura, Takaaki Senbonmatsu
Activated factor X (FXa) plays an important role in thrombin generation and inflammation. Factor X is not converted constitutively to FXa, but only after intrinsic clotting factors are activated and/or cellular injury occurs. Although rivaroxaban is one of direct FXa inhibitors, its function in the inactivated coagulation cascade is unclear. In human umbilical vein endothelial cells that natively express protease-activated receptor-1 and -2, high dose rivaroxaban did not alter gene transcripts including pro-inflammatory genes in DNA microarray...
February 24, 2017: Journal of Pharmacological Sciences
https://www.readbyqxmd.com/read/28302625/silencing-of-anticoagulant-protein-c-evokes-low-incident-but-spontaneous-atherothrombosis-in-apolipoprotein-e-deficient-mice
#14
Amber B Ouweneel, Marco Heestermans, Robin A F Verwilligen, Marion J J Gijbels, Pieter H Reitsma, Miranda van Eck, Bart J M van Vlijmen
OBJECTIVE: Murine atherosclerosis models do not spontaneously develop atherothrombotic complications. We investigated whether disruption of natural anticoagulation allows preexisting atherosclerotic plaques to progress toward an atherothrombotic phenotype. APPROACH AND RESULTS: On lowering of plasma protein C levels with small interfering RNA (siProc) in 8-week Western-type diet-fed atherosclerotic apolipoprotein E-deficient mice, one out of 4 mice displayed a large, organized, and fibrin- and leukocyte-rich thrombus on top of an advanced atherosclerotic plaque located in the aortic root...
March 16, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28301909/thrombin-activatable-fibrinolysis-inhibitor-gene-polymorphism-tafi1040c-t-in-women-with-recurrent-spontaneous-abortion
#15
Nabil ElDanasori, Nelly Abulata, Iman A Shaheen, Alaa M ElGendy, Waleed El-Khayat
Recurrent spontaneous abortion (RSA) is defined as 3 or more consecutive pregnancy failures. Thrombin-activatable fibrinolysis inhibitor (TAFI) is a plasma zymogen that regulates both fibrinolysis and inflammation. The TAFI 1040C/T polymorphism could alter the circulating levels of TAFI with a reduced capacity to remove the fibrin clots from the circulation; therefore, it could be considered a molecular risk factor for RSA. The TAFI 1040C/T polymorphism was studied in 50 patients with RSA by polymerase chain reaction-restriction fragment length polymorphism technique and compared to 50 age- and gender-matched healthy volunteers as a control group to verify its possible association with RSA...
January 1, 2017: Clinical and Applied Thrombosis/hemostasis
https://www.readbyqxmd.com/read/28301052/decreased-blood-product-usage-during-extracorporeal-life-support-with-reduced-circuit-volumes
#16
Samuel D Addison, Marcia L Buck, Gary Y Fang, James J Gangemi, David A Kaufman
BACKGROUND: Activation and consumption of platelets (PLT) and clotting factors along with hemolysis occurs when blood contacts the extracorporeal life support (ECLS) circuit and its components. STUDY DESIGN AND METHODS: The objective was to examine the effects of reducing ECLS circuit volume by decreasing tubing length and changing components on blood product usage in neonatal and pediatric patients. Blood product administration was analyzed in 40 consecutive patients who required ECLS for respiratory or cardiac failure before (PRE) and after (POST) changes in circuit design and components...
March 16, 2017: Transfusion
https://www.readbyqxmd.com/read/28299993/a-new-perspective-on-the-risk-of-hypercoagulopathy-in-ovarian-hyperstimulation-syndrome-using-thromboelastography
#17
Eyal Zohav, Benny Almog, Aviad Cohen, Ishai Levin, Varda Deutsch, Ariel Many, Ami Amit, Yoni Cohen
Thromboelastography (TEG) provides real-time assessment of hemostasis by measuring the viscoelastic properties, coagulation factor, and platelet activity in whole blood samples. In this prospective case-control study, we wanted to investigate whether blood clot formation assessment, using TEG, can identify a hypercoagulable state in women with severe ovarian hyperstimulation syndrome (OHSS). Thirty-six women who were hospitalized with severe OHSS were allocated to the OHSS group and 32 women undergoing controlled ovarian hyperstimulation but who did not develop OHSS were allocated to the control group...
January 1, 2017: Reproductive Sciences
https://www.readbyqxmd.com/read/28297730/point-of-care-coagulation-monitoring-in-trauma-patients
#18
Philipp Stein, Alexander Kaserer, Gabriela H Spahn, Donat R Spahn
Trauma remains one of the major causes of death and disability all over the world. Uncontrolled blood loss and trauma-induced coagulopathy represent preventable causes of trauma-related morbidity and mortality. Treatment may consist of allogeneic blood product transfusion at a fixed ratio or in an individualized goal-directed way based on point-of-care (POC) and routine laboratory measurements. Viscoelastic POC measurement of the developing clot in whole blood and POC platelet function testing allow rapid and tailored coagulation and transfusion treatment based on goal-directed, factor concentrate-based algorithms...
March 15, 2017: Seminars in Thrombosis and Hemostasis
https://www.readbyqxmd.com/read/28294177/rational-design-of-protein-c-activators
#19
Sergio Barranco-Medina, Mary Murphy, Leslie Pelc, Zhiwei Chen, Enrico Di Cera, Nicola Pozzi
In addition to its procoagulant and proinflammatory functions mediated by cleavage of fibrinogen and PAR1, the trypsin-like protease thrombin activates the anticoagulant protein C in a reaction that requires the cofactor thrombomodulin and the endothelial protein C receptor. Once in the circulation, activated protein C functions as an anticoagulant, anti-inflammatory and regenerative factor. Hence, availability of a protein C activator would afford a therapeutic for patients suffering from thrombotic disorders and a diagnostic tool for monitoring the level of protein C in plasma...
March 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28293394/evaluation-of-the-expression-of-viii-factor-and-vegf-in-the-regeneration-of-non-vital-teeth-in-dogs-using-propolis
#20
Mina Zarei, Amir Hossein Jafarian, Azadeh Harandi, Maryam Javidi, Maryam Gharechahi
OBJECTIVES: The purpose of the present study was the immunohistochemical evaluation of VEGF and VII factors in dog's teeth pulp revascularized with MTA and propolis. MATERIALS AND METHODS: 144 mature and immature two rooted dog's premolar canals were selected. Pulp necrosis and infection were established after 2 weeks and the disinfection of the canals was done with copious NaOCl irrigation and triantibiotic mixture (ciprofloxacin, metronidazole, and minocycline) for 3 weeks...
February 2017: Iranian Journal of Basic Medical Sciences
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