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Warfarin reversal

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https://www.readbyqxmd.com/read/29117993/an-update-on-the-bleeding-risks-associated-with-doacs
#1
(no author information available yet)
The direct oral anticoagulants (DOACs), also referred to as novel (or non-vitamin K antagonist) oral anticoagulants (NOACs), represent a major development in anticoagulation therapy due to their rapid onset of action, predictable dose-response with fixed doses and limited interactions with food and drugs.(1,2) However, these agents have been in widespread clinical use for less than a decade and, compared with extensive experience with warfarin, there is uncertainty relating to optimal laboratory monitoring of anticoagulation, perioperative management and treatment of bleeding...
November 2017: Drug and Therapeutics Bulletin
https://www.readbyqxmd.com/read/29106685/a-retrospective-propensity-score-matched-early-thromboembolic-event-analysis-of-prothrombin-complex-concentrate-vs-fresh-frozen-plasma-for-warfarin-reversal-prior-to-emergency-neurosurgical-procedures
#2
Prateek Agarwal, Kalil G Abdullah, Ashwin G Ramayya, Nikhil R Nayak, Timothy H Lucas
BACKGROUND: Reversal of therapeutic anticoagulation prior to emergency neurosurgical procedures is required in the setting of intracranial hemorrhage. Multifactor prothrombin complex concentrate (PCC) promises rapid efficacy but may increase the probability of thrombotic complications compared to fresh frozen plasma (FFP). OBJECTIVE: To compare the rate of thrombotic complications in patients treated with PCC or FFP to reverse therapeutic anticoagulation prior to emergency neurosurgical procedures in the setting of intracranial hemorrhage at a level I trauma center...
June 29, 2017: Neurosurgery
https://www.readbyqxmd.com/read/29079069/spontaneous-spinal-epidural-hematoma-in-a-patient-on-rivaroxaban-case-report-and-literature-review
#3
Raed Ismail, Elie Zaghrini, Eveline Hitti
BACKGROUND: Spinal hematomas (SHs) are rare yet potentially debilitating causes of acute back pain. Although spontaneous SHs have been described in the setting of anticoagulation with warfarin or enoxaparin, few cases of spontaneous SH on direct oral anticoagulants (DOACs) have been reported. CASE REPORT: We report a case of spontaneous spinal epidural hematoma in a patient on rivaroxaban. A 72-year-old man on rivaroxaban and aspirin presented with a 4-day history of nontraumatic back pain...
October 2017: Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29077228/air-ambulance-delivery-and-administration-of-4-factor-prothrombin-complex-concentrate-is-feasible-and-decreases-time-to-anticoagulation-reversal
#4
Claire Vines, Stephanie J Tesseneer, Robert D Cox, Damon A Darsey, Kristin Carbrey, Michael A Puskarich
OBJECTIVES: To evaluate the feasibility, safety, and preliminary efficacy of four-factor prothrombin complex concentrate (4-factor PCC) administration by an air ambulance service prior to or during transfer of patients with warfarin-associated major hemorrhage to a tertiary care center for definitive management (interventional arm) compared to patients receiving 4-factor PCC following transfer by air ambulance or ground without 4-factor PCC treatment (conventional arm). METHODS: Retrospective chart review of patients presenting to a large academic medical center...
October 27, 2017: Academic Emergency Medicine: Official Journal of the Society for Academic Emergency Medicine
https://www.readbyqxmd.com/read/29071124/management-of-anticoagulation-in-hip-fractures-a-pragmatic-approach
#5
Rafik Yassa, Mahdi Yacine Khalfaoui, Ihab Hujazi, Hannah Sevenoaks, Paul Dunkow
Hip fractures are common and increasing with an ageing population. In the United Kingdom, the national guidelines recommend operative intervention within 36 hours of diagnosis. However, long-term anticoagulant treatment is frequently encountered in these patients which can delay surgical intervention. Despite this, there are no set national standards for management of drug-induced coagulopathy pre-operatively in the context of hip fractures.The aim of this study was to evaluate the management protocols available in the current literature for the commonly encountered coagulopathy-inducing agents...
September 2017: EFORT open reviews
https://www.readbyqxmd.com/read/28992736/case-report-reversal-of-warfarin-associated-life-threatening-bleed-with-an-attenuated-dose-of-4-factor-prothrombin-complex-concentrate
#6
Allyson H Wexler, Megan A Rech
No abstract text is available yet for this article.
October 1, 2017: Annals of Pharmacotherapy
https://www.readbyqxmd.com/read/28987395/abciximab-heparin-therapy-for-left-ventricular-assist-device-implantation-in-patients-with-heparin-induced-thrombocytopenia
#7
Chia-Ling Lee, Paolo C Colombo, Andrew Eisenberger, David Diuguid, Douglas L Jennings, Jiho Han, Michael P Salna, Koji Takeda, Paul A Kurlansky, Melana Yuzefpolskaya, Arthur R Garan, Yoshifumi Naka, Hiroo Takayama
BACKGROUND: Optimal anticoagulation strategy remains uncertain in patients with heparin-induced thrombocytopenia (HIT) and undergoing left ventricular assist device (LVAD) implantation. We describe our protocol of abciximab and heparin in these patients. METHODS: Our protocol is to administer abciximab, 0.25 mg/kg loading dose, followed by continuous infusion of 0.125 μg · kg(-1) · min(-1) throughout cardiopulmonary bypass. Full-dose heparin is then given with subsequent additional doses to maintain an activated clotting time of 400 seconds or longer...
October 4, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28981174/reversal-of-warfarin-era-thinking
#8
Joseph J Shatzel, Molly M Daughety, Vinay Prasad, Thomas G DeLoughery
Anticoagulation offers benefits in appropriately selected patients, however, all anticoagulants increase the risk of bleeding, which can be, at times, life threatening. For decades, vitamin K antagonists were the only oral anticoagulants available to physicians and their patients. In recent years, we have witnessed the approval of five direct oral anticoagulants (DOACs), which have shifted prior paradigms in anticoagulation such as omitting the need for routine therapeutic monitoring and lessening concerns about food and drug interactions...
October 5, 2017: Journal of Internal Medicine
https://www.readbyqxmd.com/read/28957948/reversal-agents-for-oral-anticoagulants
#9
Carrie L Griffiths, Mark L Vestal, Spencer J Livengood, Samantha Hicks
For more than half a century, warfarin, a vitamin K antagonist, has been the anticoagulant of choice. However, direct oral anticoagulants are rapidly gaining in popularity, which poses the need for efficacious reversal agents. This review article summarizes the strategies and agents used to reverse oral anticoagulants.
November 16, 2017: Nurse Practitioner
https://www.readbyqxmd.com/read/28945930/plasma-transfusions-prior-to-lumbar-punctures-and-epidural-catheters-for-people-with-abnormal-coagulation
#10
REVIEW
Lise J Estcourt, Michael J Desborough, Carolyn Doree, Sally Hopewell, Simon J Stanworth
BACKGROUND: The insertion of a lumbar puncture needle or epidural catheter may be associated with peri- and post-procedural bleeding. People who require this procedure may have disorders of coagulation as a result of their underlying illness, co-morbidities or the effects of treatment. Clinical practice in some institutions is to mitigate the risk of bleeding in these patients by prophylactically transfusing plasma in order to correct clotting factor deficiencies prior to the procedure...
September 25, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28901221/direct-oral-anticoagulant-reversal-how-when-and-issues-faced
#11
Mikhail S Dzeshka, Daniele Pastori, Gregory Y H Lip
The number of atrial fibrillation (AF) patients requiring thrombo-prophylaxis with oral anticoagulation is greatly increasing. The introduction of non-vitamin K oral anticoagulants (NOACs) in addition to standard therapy with dose-adjusted warfarin has increased the therapeutic options for AF patients. Despite a generally better safety profile of the NOACs, the risk of major bleedings still persists, and the management of serious bleeding is a clinical challenge. Areas covered: In the current review, risk of major bleeding in patients taking NOACs and general approaches to manage bleeding depending on severity, with a particular focus on specific reversal agents, are discussed...
November 2017: Expert Review of Hematology
https://www.readbyqxmd.com/read/28863196/impact-of-inr-monitoring-reversal-agent-use-heparin-bridging-and-anticoagulant-interruption-on-rebleeding-and-thromboembolism-in-acute-gastrointestinal-bleeding
#12
Naoyoshi Nagata, Toshiyuki Sakurai, Shiori Moriyasu, Takuro Shimbo, Hidetaka Okubo, Kazuhiro Watanabe, Chizu Yokoi, Mikio Yanase, Junichi Akiyama, Naomi Uemura
BACKGROUND: Anticoagulant management of acute gastrointestinal bleeding (GIB) during the pre-endoscopic period has not been fully addressed in American, European, or Asian guidelines. This study sought to evaluate the risks of rebleeding and thromboembolism in anticoagulated patients with acute GIB. METHODS: Baseline, endoscopy, and outcome data were reviewed for 314 patients with acute GIB: 157 anticoagulant users and 157 age-, sex-, and important risk-matched non-users...
2017: PloS One
https://www.readbyqxmd.com/read/28843518/management-of-factor-xa-inhibitor-associated-life-threatening-major-hemorrhage-a-retrospective-multi-center-analysis
#13
Truman J Milling, Carol L Clark, Charles Feronti, Shlee S Song, Sam S Torbati, Gregory J Fermann, Jeffrey Weiss, Dony Patel
BACKGROUND: Factor Xa (FXa) inhibitors, used for stroke prevention in atrial fibrillation and venous thromboembolism treatment and prevention, are the dominant non-Vitamin K oral anticoagulants on the market. While major bleeding may be less common with these agents compared to warfarin, it is always a risk, and little has been published on the most serious bleeding scenarios. This study describes a cohort of patients with FXa inhibitor-associated life-threatening bleeding events, their clinical characteristics, interventions and outcomes...
August 19, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28838728/perioperative-use-of-coagulation-factor-concentrates-in-patients-undergoing-cardiac-surgery
#14
REVIEW
Mark M Smith, Elena Ashikhmina, Nathan J Brinkman, David W Barbara
Coagulopathy and bleeding are common in patients undergoing cardiac surgery, with a perioperative transfusion rate in excess of 50%. The mechanism of coagulopathy associated with cardiac surgery using cardiopulmonary bypass is multifactorial. Historically, coagulation factor-mediated bleeding in such instances has been treated with allogeneic plasma transfusion. Coagulation factor concentrate use for treatment of hemophilia, congenital factor deficiencies and, more recently, emergency warfarin reversal is common...
October 2017: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/28833357/prothrombin-complex-concentrate-reduces-blood-product-utilization-in-heart-transplantation
#15
Daniel H Enter, Anthony L Zaki, Megan Marsh, Nikki Cool, Jane Kruse, Zhi Li, Adin-Cristian Andrei, Adam Iddriss, Patrick M McCarthy, S Chris Malaisrie, Allen Anderson, Jonathan D Rich, Duc Thinh Pham
BACKGROUND: Current practices for the reversal of warfarin prior to cardiac surgery include the use of vitamin K and fresh frozen plasma (FFP) to reduce the risk of bleeding. Although the 2010 International Society of Heart and Lung Transplantation guidelines acknowledge the use of PCC (Prothrombin Complex Concentrate), there is no clear consensus on its efficacy. The objective of this study was to assess the efficacy of 4-factor Prothrombin Complex Concentrate (4-F PCC) administration in patients requiring warfarin reversal prior to heart transplantation by determining blood product utilization perioperatively...
August 22, 2017: Pharmacotherapy
https://www.readbyqxmd.com/read/28768548/the-anticoagulated-trauma-patient-in-the-age-of-the-direct-oral-anticoagulants-a-canadian-perspective
#16
Brendan Wood, Barto Nascimento, Sandro Rizoli, Michelle Sholzberg, Amanda McFarlan, Andrea Phillips, Alun D Ackery
BACKGROUND: The anticoagulated trauma patient presents a particular challenge to the critical care physician. Our understanding of these patients is defined and extrapolated by experience with patients on warfarin pre-injury. Today, many patients who would have been on warfarin are now prescribed the Direct Oral Anticoagulants (DOACs) a class of anticoagulants with entirely different mechanisms of action, effects on routine coagulation assays and approach to reversal. METHODS: Trauma registry data from Toronto's (Ontario, Canada) two Level 1 trauma centres were used to identify patients on oral anticoagulation pre-injury from June 1, 2014 to June 1, 2015...
August 2, 2017: Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine
https://www.readbyqxmd.com/read/28763307/comparison-of-3-factor-versus-4-factor-prothrombin-complex-concentrate-with-regard-to-warfarin-reversal-blood-product-use-and-costs
#17
Jessica DeAngelo, Daniel Jarrell, Richard Cosgrove, James Camamo, Christopher Edwards, Asad E Patanwala
BACKGROUND: Prothrombin complex concentrates (PCCs) are drug products containing varying amounts of vitamin K-dependent coagulation factors II, VII, IX, and X. The evidence comparing 3-factor PCC (3-PCC) versus 4-factor PCC (4-PCC) for warfarin reversal is conflicting. It has been hypothesized that 3-PCC may be less effective than 4-PCC because of relatively lower factor VII content. STUDY QUESTION: The primary objective of this study was to compare international normalized ratio (INR) reversal between 3-PCC and 4-factor PCC (4-PCC) in warfarin-treated patients...
July 26, 2017: American Journal of Therapeutics
https://www.readbyqxmd.com/read/28707821/splenic-vein-thrombosis-following-pancreas-transplantation-identification-of-factors-that-support-conservative-management
#18
J W Harbell, T Morgan, V A Feldstein, G R Roll, A Posselt, S-M Kang, S Feng, R Hirose, C E Freise, P Stock
Prophylaxis for graft portal/splenic venous thrombosis following pancreas transplant varies between institutions. Similarly, treatment of venous thrombosis ranges from early re-exploration to conservative management with anticoagulation. We wished to determine the prevalence of graft splenic vein (SV) thrombosis, as well as the clinical significance of non-occlusive thrombus observed on routine imaging. Records of 112 pancreas transplant recipients over a 5-year period at a single center were reviewed. Venous thrombosis was defined as absence of flow or presence of thrombus identified in any part of the graft SV on ultrasound...
July 14, 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/28699743/development-and-validation-of-quantitative-ultraperformance-liquid-chromatography-tandem-mass-spectrometry-assay-for-anticoagulant-rodenticides-in-liver
#19
Lori L Smith, Boying Liang, Marcia C Booth, Michael S Filigenzi, Andriy Tkachenko, Cynthia L Gaskill
Anticoagulant rodenticides (ARs) are used to control rodent populations; however, exposure to nontarget animals occurs. A sensitive and rugged quantitative method was developed, optimized, and validated for eight ARs in liver. Target analytes comprised two chemical classes: hydroxycoumarins (warfarin, coumachlor, dicoumarol, bromadiolone, brodifacoum, and difethialone) and indanediones (diphacinone and chlorophacinone). In this method, liver extracts were cleaned using dispersive solid phase extraction (d-SPE) to remove matrix interferences and analyzed by reverse phase ultraperformance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS)...
August 9, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28679672/the-impact-of-the-hepatocyte-to-plasma-ph-gradient-on-the-prediction-of-hepatic-clearance-and-drug-drug-interactions-for-cyp2c9-and-cyp3a4-substrates
#20
Luc Raymond Albert Rougee, Michael A Mohutsky, David W Bedwell, Kenneth J Ruterbories, Stephen D Hall
Surrogate assays for drug metabolism and inhibition are traditionally performed in buffer systems at pH 7.4, despite evidence that hepatocyte intracellular pH is 7.0. This pH gradient can result in a pKa-dependent change in intracellular/extracellular concentrations for ionizable drugs that could affect predictions of clearance and P450 inhibition. The effect of microsomal incubation pH on in vitro enzyme kinetic parameters for CYP2C9 (diclofenac, (S)-warfarin) and CYP3A4 (midazolam, dextromethorphan, testosterone) substrates, enzyme specific reversible inhibitors (amiodarone, desethylamiodarone, clozapine, nicardipine, fluconazole, fluvoxamine, itraconazole) and a mechanism-based inhibitor (amiodarone) was investigated...
July 5, 2017: Drug Metabolism and Disposition: the Biological Fate of Chemicals
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