Tags Archives: heparin

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Combined Antithrombin and Heparin Supplementation to Blood for Restoring Heparin Responsiveness After Andexanet Alfa Exposure: An In Vitro Model

Abstract Background: Andexanet alfa, a Gla-domainless mutant factor Xa (GDXa), reverses oral FXa inhibitors but can cause severe heparin resistance during cardiopulmonary bypass (CPB). Antithrombin (AT) supplementation may mitigate this..

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Automated Thromboelastometry for Semiquantitative Assessment of High Heparin Concentrations: A Feasibility Study in Healthy Volunteers

Abstract Background and Aims To date, thromboelastometry has not been investigated as an assay to monitor profound heparin anticoagulation, such as is required for a safe cardiopulmonary bypass (CPB). The..

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Mortality and complications in low-dose vs standard-dose unfractionated heparin anticoagulation for extracorporeal membrane oxygenation: a systematic review and meta-analysis

Abstract Background Controversies exist in anticoagulation practices in extracorporeal membrane oxygenation (ECMO). It is uncertain whether the intensity of anticoagulation affects ECMO outcomes. Objectives To conduct a meta-analysis to determine..

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Heparin: Over 100 Years of Anticoagulation

Abstract This chapter provides an overview of heparin, including discovery, structure, mechanism of action, and principal use for anticoagulation. For over 100 years, heparin has a central role in prophylaxis..

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Detecting Heparin Contamination in Prolonged APTT with a Heparin-Resistant Solution

Abstract The activated partial thromboplastin time (APTT) assay is essential for evaluating coagulation. However, prolonged APTT may result from pathological conditions or contamination with unfractionated heparin (UFH), which can occur..

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Heparin Resistance in Cardiac Surgery with Cardiopulmonary Bypass: Mechanisms, Clinical Implications, and Evidence-Based Management

Abstract Background: Unfractionated heparin (UFH) is the standard anticoagulant during cardiopulmonary bypass (CPB). A clinically relevant subset develops heparin resistance (HR)—failure to reach adequate anticoagulation with usual UFH—raising thrombotic risk..

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Use of Andexanet Alfa to Reverse Heparin After Cardiopulmonary Bypass

Abstract Heparin is the primary anticoagulant used for cardiopulmonary bypass and requires reversal to prevent postoperative bleeding. Protamine sulfate is the only United States Food and Drug Administration–approved heparin reversal..

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Heparin Resistance in Cardiac Surgery with Cardiopulmonary Bypass: Mechanisms, Clinical Implications, and Evidence-Based Management

Abstract Background: Unfractionated heparin (UFH) is the standard anticoagulant during cardiopulmonary bypass (CPB). A clinically relevant subset develops heparin resistance (HR)—failure to reach adequate anticoagulation with usual UFH—raising thrombotic risk..

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A Comparative Analysis of Bivalirudin and Heparin for Extracorporeal Membrane Oxygenation in a Pediatric Cardiothoracic Intensive Care Unit

Abstract Unfractionated heparin has long been the conventional anticoagulant for pediatric mechanical circulatory support (MCS). As bivalirudin has gained traction in ventricular assist devices (VAD) management, its role in extracorporeal..

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Influence of High-Dose Heparin on CT EXTEM of ROTEM Sigma and ROTEM Delta During Cardiopulmonary Bypass

Abstract Transfusion management during cardiac surgery is commonly guided by algorithms using viscoelastic tests such as Rotational Thromboelastometry (ROTEM). Recently, the ROTEM Sigma, a new device developed as a fully..

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Uncovering digital overdiagnosis – Quantification and mitigation using clinical trajectories: Heparin-induced thrombocytopenia use case

Abstract Objective Overdiagnosis occurs when abnormalities meeting diagnostic criteria would remain asymptomatic if undiagnosed. Cases initially identified through digital diagnostic tools but later recognised as overdiagnosis are referred to as..

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The impact of antithrombin III supplementation on prognosis during extracorporeal membrane oxygenation: a systematic review and meta-analysis

Abstract Extracorporeal membrane oxygenation (ECMO) is a mechanical circulatory and respiratory support system that facilitates gas exchange and hemodynamic stabilization through an external circuit. ECMO has been increasingly utilized for..

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Residual Heparinization After Cardiac Surgery:A Prospective Observational Study

Abstract Objectives Residual heparinization is a preventable cause of coagulopathy following cardiac surgery. The aim of this work was to assess the proportion of patients with residual heparinization following cardiac..

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Comparison of Three Mathematical Models of the Pharmacokinetics of Heparin to Guide the Use of Protamine in a Large Simulated…

Abstract Background: In cardiac surgery, protamine is used to reverse the effects of heparin after separation from cardiopulmonary bypass (CPB). Excess of protamine has been demonstrated to cause platelet dysfunction and..

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Real-time prediction of heparin concentration in blood extracorporeal circulation by relaxation time distribution (RTD)

Abstract In blood extracorporeal circulations such as hemodialysis (HD) and extracorporeal membrane artificial lung (ECMO) during the surgical operation, the real-time and noninvasive prediction of heparin concentration c is necessary over the..

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Low-Range Heparin and Protamine Detection: A Single-Center Prospective Diagnostic Study

Abstract Objectives The detection of low-range heparin activity is important to correctly assess heparin reversal and rebound, especially after cardiopulmonary bypass. Current parameters are either not available at point-of-care (anti-Xa..

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Factors associated with activated clotting time following heparin administration in pediatric cardiopulmonary bypass: A retrospective study

Abstract Introduction The recently recommended activated clotting time (ACT) to be maintained at the initiation of and during cardiopulmonary bypass (CPB) is ≥480 s. However, the post-unfractionated heparin (UFH) administration ACT..

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A retrospective investigation of varied dose of heparin for cardiopulmonary bypass for repair of cardiac myxomas

Abstract Introduction There is no consensus on the dose of heparin to be used intraoperatively in cardiac myxomas, so the goal of this study was to look into the differences..

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Troubleshooting heparin resistance

Abstract The term heparin resistance is likely best defined as the failure of an appropriate dose of unfractionated heparin (UFH) to achieve a predetermined level of anticoagulation. Unfortunately, and despite..

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Prospective Randomized Pilot Study Comparing Bivalirudin Versus Heparin in Neonatal and Pediatric Extracorporeal Membrane Oxygenation

Abstract Objectives:  To test feasibility of a randomized controlled trial (RCT) with an endpoint of time at goal anticoagulation in children on extracorporeal membrane oxygenation (ECMO) randomized to receive bivalirudin..

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Protamine Dosing for Heparin Reversal after Cardiopulmonary Bypass: A Double-blinded Prospective Randomized Control Trial Comparing Two Strategies

Abstract Background Drug shortages are a frequent challenge in current clinical practice. Certain drugs (e.g., protamine) lack alternatives, and inadequate supplies can limit access to services. Conventional protamine dosing uses..

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Antithrombin Levels and Heparin Responsiveness during Venoarterial Extracorporeal Membrane Oxygenation: A Prospective Single-center Cohort Study

Abstract Background Unfractionated heparin, administered during venoarterial extracorporeal membrane oxygenation to prevent thromboembolic events, largely depends on plasma antithrombin for its antithrombotic effects. Decreased heparin responsiveness seems frequent on extracorporeal..

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Low Versus Standard Intensity Heparin Protocols in Adults Maintained on Extracorporeal Membrane Oxygenation: A Retrospective Cohort Study

Abstract Background:  Patients maintained on extracorporeal membrane oxygenation (ECMO) often require systemic anticoagulation to prevent circuit clotting and systemic thromboembolic complications. The optimal intensity of anticoagulation to balance the risk..

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Heparin treatment is associated with a delayed diagnosis of Alzheimer’s dementia in electronic health records from two large United States…

Abstract Recent studies suggest that heparan sulfate proteoglycans (HSPG) contribute to the predisposition to, protection from, and potential treatment and prevention of Alzheimer’s disease (AD). Here, we used electronic health..

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Uncommon and Unfavorable: Heparin-Induced Hyperkalemia

Abstract Case Report A 56-year-old male with a medical history significant for coronary artery disease complicated by non-ST segment elevation myocardial infarction in 2011 (at which time he received a..

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Interaction of heparin and protamine in presence of overdosage: in vitro study

Abstract Background Heparin is used for anticoagulation during cardiopulmonary bypass. After weaning from bypass, protamine is administered to neutralize the effects of heparin and thus reestablish hemostasis. Rotational thrombelastometry has..

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Consumptive coagulopathy: how low-dose unfractionated heparin can prevent bleeding complications during extracorporeal life support

Abstract Bleeding and thrombotic complications are major drivers in extracorporeal life support (ECLS) patients’ negative outcomes and are reported in up to 40% of the ECLS-runs [1, 2]. Consumptive coagulopathy..

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Heparin-induced DRESS syndrome in a paediatric patient and successful anaesthetic management in cardiovascular bypass surgery: case report

Abstract Background Drug Reaction with Eosinophilia and Systemic Symptoms (DRESS) Syndrome is a severe adverse drug reaction marked by delayed hypersensitivity reactions causing skin and systemic complications. DRESS diagnosis is..

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Normalizing Anti-Thrombin III for heparin management during routine cardiopulmonary bypass for congenital cardiothoracic surgery: A single institution practice review

Abstract Introduction Over the past decade, there has been an increase in the use of recombinant Anti-Thrombin III (AT-III) administration during neonatal and pediatric short- and long-term mechanical support for..

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Synthesis of bioengineered heparin chemically and biologically similar to porcine-derived products and convertible to low MW heparin

Abstract Heparins have been invaluable therapeutic anticoagulant polysaccharides for over a century, whether used as unfractionated heparin or as low molecular weight heparin (LMWH) derivatives. However, heparin production by extraction..

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