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Challenges and Possible Solutions to Direct-Acting Oral Anticoagulants (DOACs) Dosing in Patients with Extreme Bodyweight and Renal Impairment. Am J Cardiovasc Drugs 2023; 23:9-17. [PMID: 36515822 DOI: 10.1007/s40256-022-00560-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/04/2022] [Indexed: 12/15/2022]
Abstract
This article aims to highlight the dosing issues of direct oral anticoagulants (DOACs) in patients with renal impairment and/or obesity in an attempt to develop solutions employing advanced data-driven techniques. DOACs have become widely accepted by clinicians worldwide because of their superior clinical profiles, more predictable pharmacokinetics, and hence more convenient dosing relative to other anticoagulants. However, the optimal dosing of DOACs in extreme bodyweight patients and patients with renal impairment is difficult to achieve using the conventional dosing approach. The standard dosing approach (fixed-dose) is based on limited data from clinical studies. The existing formulae (models) for determining the appropriate doses for these patient groups leads to suboptimal dosing. This problem of mis-dosing is worsened by the lack of standardized laboratory parameters for monitoring the exposure to DOACs in renal failure and extreme bodyweight patients. Model-informed precision dosing (MIPD) encompasses a range of techniques like machine learning and pharmacometrics modelling, which could uncover key variables and relationships as well as shed more light on the pharmacokinetics and pharmacodynamics of DOACs in patients with extreme bodyweight or renal impairment. Ultimately, this individualized approach-if implemented in clinical practice-could optimise dosing for the DOACs for better safety and efficacy.
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2
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Kobalava ZD, Shavarov AA, Vatsik-Gorodetskaya MV. Direct Oral Anticoagulants in Patients with Atrial Fibrillation and Renal Dysfunction. RATIONAL PHARMACOTHERAPY IN CARDIOLOGY 2021. [DOI: 10.20996/1819-6446-2021-02-03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Atrial fibrillation and renal dysfunction often coexist, each disorder may predispose to the other and contribute to worsening prognosis. Both atrial fibrillation and chronic kidney disease are associated with increased risk of stroke and thromboembolic complications. Oral anticoagulation for stroke prevention is therefore recommended in patients with atrial fibrillation and decreased renal function. Each direct oral anticoagulant has unique pharmacologic properties of which clinician should be aware to optimally manage patients. The doses of direct oral anticoagulants require adjustment for renal function. There is debate regarding which equation, the Chronic Kidney Disease Epidemiology (CKD-EPI) equation vs. the Cockcroft-Gault equation, should be used to estimate glomerular filtration rate in patients with atrial fibrillation treated with direct oral anticoagulants. Our review tries to find arguments for benefit of direct oral anticoagulants in patients with renal dysfunction.
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Affiliation(s)
- Z. D. Kobalava
- Peoples Friendship University of Russia (RUDN University)
| | - A. A. Shavarov
- Peoples Friendship University of Russia (RUDN University)
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Simpson BH, Reith DM, Medlicott NJ, Smith AJ. Choice of Renal Function Estimator Influences Adverse Outcomes with Dabigatran Etexilate in Patients with Atrial Fibrillation. TH OPEN 2019; 2:e420-e427. [PMID: 31249970 PMCID: PMC6524914 DOI: 10.1055/s-0038-1676356] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Accepted: 10/15/2018] [Indexed: 12/12/2022] Open
Abstract
Background
Clinical significance of dosing dabigatran with different estimates of renal function for treatment of atrial fibrillation (AF) is unknown. Renal function is routinely estimated by the chronic kidney disease epidemiology initiative equation (CKD-EPI) and used to guide dosing. The aim of this study was to investigate the risk of adverse outcomes for patients with AF when different estimators of renal function are used.
Material and Methods
AF patient data were extracted from national administrative databases. Renal function was estimated using Cockcroft–Gault, CKD-EPI, and CKD-EPI adjusted for body surface area (CKD-EPI-BSA). Outcomes of cerebrovascular accident (CVA), systemic embolism (SE), and hemorrhage were extracted.
Results
In total, 2,425 patients were identified, of which there were hospitalizations for 138 (5.7%) hemorrhagic events, 45 (1.9%) CVA/SE, and 33 (1.4%) unspecified CVA. The level of agreement between Cockcroft–Gault with CKD-EPI and CKD-EPI-BSA yielded a weighted kappa statistic of 0.47 and 0.71, respectively. CKD-EPI and CKD-EPI-BSA significantly overestimated renal function in elderly patients resulting in higher recommended doses compared with Cockcroft–Gault. The hazard ratio for a hemorrhagic event was 2.32 (95% confidence interval, 1.22–4.42;
p
= 0.01) when a high dose was given compared with normal dose, based on Cockcroft–Gault.
Conclusion
Both CKD-EPI and CKD-EPI-BSA equations significantly overestimated renal function in the elderly population compared with the Cockcroft–Gault equation. This may lead to dose selection errors for dabigatran, particularly for those with severe impairment, increasing the risk of adverse outcome. Hence, CKD-EPI and CKD-EPI-BSA equations should not be substituted for the Cockcroft–Gault equation in the elderly for the purpose of renal dosage adjustments.
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Affiliation(s)
- Bryan H Simpson
- School of Pharmacy, University of Otago, Dunedin, New Zealand
| | - David M Reith
- Dunedin Medical School, University of Otago, Dunedin, New Zealand
| | | | - Alesha J Smith
- School of Pharmacy, University of Otago, Dunedin, New Zealand
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4
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Discrepancy Between Equations Estimating Kidney Function in Geriatric Care: A Study of Implications for Drug Prescription. Drugs Aging 2018; 36:155-163. [DOI: 10.1007/s40266-018-0618-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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5
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Houlind MB, Petersen KK, Palm H, Jørgensen LM, Aakjær M, Christrup LL, Petersen J, Andersen O, Treldal C. Creatinine-Based Renal Function Estimates and Dosage of Postoperative Pain Management for Elderly Acute Hip Fracture Patients. Pharmaceuticals (Basel) 2018; 11:E88. [PMID: 30231578 PMCID: PMC6160960 DOI: 10.3390/ph11030088] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 09/13/2018] [Accepted: 09/14/2018] [Indexed: 12/12/2022] Open
Abstract
Many analgesics and their metabolites are renally excreted. The widely used Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI)-estimated glomerular filtration rate (eGFR) equations are not developed for use in the elderly, while the recent Berlin Initiative Study (BIS), Full Age Spectrum (FAS), and Lund-Malmö revised (LMR) equations are. This observational study investigated differences between creatinine-based eGFR equations and how the choice of equation influences dosage of analgesics in elderly (≥70 years) patients admitted with acute hip fracture. eGFR was calculated by the CKD-EPI, BIS, Cockcroft-Gault (CG), FAS, LMR, and Modification of Diet in Renal Disease (MDRD) equations. Standard daily dose for postoperative pain medications ibuprofen, morphine and gabapentin was simulated for each equation according to dosage recommendations in Renbase®. For 118 patients, mean eGFR from the CKD-EPI, BIS, CG, FAS, LMR, and MDRD equations was 67.3 mL/min/1.73 m², 59.1 mL/min/1.73 m², 56.9 mL/min/1.73 m², 60.3 mL/min/1.73 m², 58.9 mL/min/1.73 m², and 79.1 mL/min/1.73 m², respectively (p < 0.0001). Mean difference to CKD-EPI was -10.4 mL/min/1.73 m² to 11.8 mL/min/1.73 m². Choice of eGFR equation significantly influenced the recommended dose (p < 0.0001). Shifting to BIS, FAS, or LMR equations led to a lower recommended dose in 20% to 31% of patients. Choice of eGFR equation significantly influenced dosing of ibuprofen, morphine, and gabapentin.
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Affiliation(s)
- Morten Baltzer Houlind
- Optimed, Clinical Research Centre, Copenhagen University Hospital Hvidovre, Kettegård Alle 30, Department 056, 2650 Hvidovre, Denmark.
- The Capital Region Pharmacy, Marielundvej 25, 2730 Herlev, Denmark.
- Section of Pharmacotherapy, Department of Drug Design and Pharmacology, University of Copenhagen, Universitetsparken 2, 2100 København Ø, Denmark.
| | - Kristian Kjær Petersen
- Center for Sensory-Motor Interaction (SMI), Department of Health Science and Technology, Faculty of Medicine, Aalborg University, Fredrik Bajers Vej 7, building A2-206, 9220 Aalborg Ø, Denmark.
| | - Henrik Palm
- Orthopedic Department, Copenhagen University Hospital Bispebjerg, Bispebjerg Bakke 23, 2400 København, Denmark.
| | - Lillian Mørch Jørgensen
- Optimed, Clinical Research Centre, Copenhagen University Hospital Hvidovre, Kettegård Alle 30, Department 056, 2650 Hvidovre, Denmark.
| | - Mia Aakjær
- Optimed, Clinical Research Centre, Copenhagen University Hospital Hvidovre, Kettegård Alle 30, Department 056, 2650 Hvidovre, Denmark.
- The Capital Region Pharmacy, Marielundvej 25, 2730 Herlev, Denmark.
- Section of Pharmacotherapy, Department of Drug Design and Pharmacology, University of Copenhagen, Universitetsparken 2, 2100 København Ø, Denmark.
| | - Lona Louring Christrup
- Section of Pharmacotherapy, Department of Drug Design and Pharmacology, University of Copenhagen, Universitetsparken 2, 2100 København Ø, Denmark.
| | - Janne Petersen
- Optimed, Clinical Research Centre, Copenhagen University Hospital Hvidovre, Kettegård Alle 30, Department 056, 2650 Hvidovre, Denmark.
- Section of Biostatistics, Department of Public Health, University of Copenhagen, Øster Farimagsgade 5, Enterance B, 2nd floor, 1014 København, Denmark.
| | - Ove Andersen
- Optimed, Clinical Research Centre, Copenhagen University Hospital Hvidovre, Kettegård Alle 30, Department 056, 2650 Hvidovre, Denmark.
- Emergency Department, Copenhagen University Hospital Hvidovre, Kettegård Alle 30, Department 436, 2650 Hvidovre, Denmark.
| | - Charlotte Treldal
- Optimed, Clinical Research Centre, Copenhagen University Hospital Hvidovre, Kettegård Alle 30, Department 056, 2650 Hvidovre, Denmark.
- The Capital Region Pharmacy, Marielundvej 25, 2730 Herlev, Denmark.
- Section of Pharmacotherapy, Department of Drug Design and Pharmacology, University of Copenhagen, Universitetsparken 2, 2100 København Ø, Denmark.
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Olivera P, Gabilondo M, Constans M, Tàssies D, Plensa E, Pons V, Las Heras G, Jiménez C, Campoy D, Bustins A, Oliver A, Marzo C, Canals T, Varela A, Sorigue M, Sánchez E, Ene G, Perea G, Vicente L, López M, Cerdá M, Johansson E, Aguinaco MR, Santos N, Mateo J, Reverter JC, Moya Á, Santamaría A. Tromboc@t Working Group recommendations for management in patients receiving direct oral anticoagulants. Med Clin (Barc) 2018; 151:210.e1-210.e13. [PMID: 29602444 DOI: 10.1016/j.medcli.2018.01.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Revised: 01/07/2018] [Accepted: 01/25/2018] [Indexed: 10/17/2022]
Abstract
BACKGROUND AND OBJECTIVES In recent years, direct oral anticoagulants (DOACs) have become an alternative to vitamin K antagonists (VKA) for the prevention of stroke and systemic embolism in patients with non-valvular atrial fibrillation (NVAF) as well as for prevention and treatment of deep venous thrombosis. Pivotal trials have demonstrated non-inferiority and potential superiority compared to warfarin, which increases the options of anticoagulant treatment. In our setting, the Anticoagulant Treatment Units (ATUs) and Primary Care Centres (PCCs) play an important role in the education, follow-up, adherence control and management in special situations of anticoagulated patients. These considerations have motivated us to elaborate the present consensus document that aims to establish clear recommendations that incorporate the findings of scientific research into clinical practice to improve the quality of care in the field of anticoagulation. MATERIAL AND METHODS A group of experts from the Catalan Thrombosis Group (TROMBOC@T) reviewed all published literature from 2009 to 2016, in order to provide recommendations based on clinical evidence. RESULTS As a result of the project, a set of practical recommendations have been established that will facilitate treatment, education, follow-up and management in special situations of anticoagulated patients with ACODs. CONCLUSIONS Progressive increase in the use of DOACs calls for measures to establish and homogenise clinical management guidelines for patients anticoagulated with DOACs in ATUs and PCCs.
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Affiliation(s)
- Pável Olivera
- Unidad de Trombosis y Hemostasia, Departamento de Hematología, Hospital Universitari Vall d' Hebron, Barcelona, España
| | - Miren Gabilondo
- Departamento de Hematología, Hospital Universitario Araba Txagorritxu, Vitoria, España
| | - Mireia Constans
- Unidad de Trombosis y Hemostasia, Departamento de Hematología, Hospital Universitari Vall d' Hebron, Barcelona, España
| | - Dolors Tàssies
- Unidad de Hemostasia y Trombosis, Departamento de Hemoterapia y Hemostasia (ICMHO), Hospital Clínic, Barcelona, España
| | - Esther Plensa
- Departamento de Hematología, Consorci Sanitari del Maresme, Mataró, España
| | - Verónica Pons
- Unidad de Trombosis y Hemostasia, Departamento de Hematología, Hospital Universitari Vall d' Hebron, Barcelona, España
| | - Germán Las Heras
- Departamento de Hematología, Parc Sanitari Sant Joan de Déu, Sant Boi de Llobregat, España
| | - Carmen Jiménez
- Departamento de Hematología, Hospital del Mar , Barcelona, España
| | - Desirée Campoy
- Departamento de Hematología, Hospital Universitari Sagrat Cor, Barcelona, España
| | - Anna Bustins
- Departamento de Hematología, Hospital Universitari Doctor Josep Trueta, Girona, España
| | - Artur Oliver
- Departamento de Hematología, Fundació Puigvert, Barcelona, España
| | - Cristina Marzo
- Departamento de Hematología, Hospital Universitari Arnau de Vilanova, Lleida, España
| | - Tania Canals
- Unidad de Trombosis y Hemostasia, Departamento de Hematología, Hospital Universitari Vall d' Hebron, Barcelona, España
| | - Anna Varela
- Unidad de Trombosis y Hemostasia, Departamento de Hematología, Hospital Universitari Vall d' Hebron, Barcelona, España
| | - Marc Sorigue
- Unidad de Trombosis y Hemostasia, Hospital Universitari Germans Trias i Pujol, Badalona, España
| | - Eva Sánchez
- Unidad de Trombosis y Hemostasia, Departamento de Hematología, Hospital Universitari Vall d' Hebron, Barcelona, España
| | - Gabriela Ene
- Departamento de Hematología, Hospital Sant Joan de Déu de Martorell , España
| | - Granada Perea
- Departemento de Hematología, Corporació Sanitaria Parc Taulí, Sabadell, España
| | - Laura Vicente
- Departamento de Hematología, Consorci Sanitari de Terrasa - Hospital de Terrasa, , España
| | - Meritxell López
- Departamento de Hematología, Hospital Universitario Mútua Terrassa, España
| | - María Cerdá
- Unidad de Trombosis y Hemostasia, Departamento de Hematología, Hospital Universitari Vall d' Hebron, Barcelona, España
| | - Erik Johansson
- Unidad de Trombosis y Hemostasia, Departamento de Hematología, Hospital Universitari Vall d' Hebron, Barcelona, España
| | - M Reyes Aguinaco
- Departamento de Hematología, Hospital Universitari Joan XXIII , Tarragona, España
| | - Nazly Santos
- Departamento de Hematología, Hospital Universitari Arnau de Vilanova, Lleida, España
| | - José Mateo
- Unidad de Trombosis y Hemostasia, Departamento de Hematología, Hospital de la Santa Creu i Sant Pau, Barcelona, España
| | | | - Ángel Moya
- Unidad de Arritmias, Departamento de Cardiología, Hospital Universitari Vall d' Hebron, Barcelona, España
| | - Amparo Santamaría
- Unidad de Trombosis y Hemostasia, Departamento de Hematología, Hospital Universitari Vall d' Hebron, Barcelona, España.
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7
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Abstract
The incidence of acute kidney injury in the elderly has grown over the past decade. One of the primary drivers is drug-induced nephrotoxicity, which is the result of a combination of the unique susceptibilities to kidney injury and the increased use of medications in the elderly population. Specific drug classes are associated with increased rates of kidney injury including agents that block the renin angiotensin system, antimicrobials, and chemotherapeutic agents. Mechanistically, injury may be due to hemodynamic effects, tubular or glomerular toxicity, and interstitial nephritis. Early recognition of nephrotoxicity is critical, as are preventative steps when applicable. Unfortunately, treatment for established drug-induced kidney injury is limited and supportive care is required. Limiting exposure to nephrotoxic drugs is critical in decreasing the incidence of acute kidney injury in the elderly patient.
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9
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Pérez Cabeza AI, Chinchurreta Capote PA, González Correa JA, Ruiz Mateas F, Rosas Cervantes G, Rivas Ruiz F, Valle Alberca A, Bravo Marqués R. Discrepancias entre el empleo de las ecuaciones MDRD-4 IDMS y CKD-EPI en vez de la de Cockcroft-Gault en la determinación de la posología de los anticoagulantes orales directos en pacientes con fibrilación auricular no valvular. Med Clin (Barc) 2018; 150:85-91. [DOI: 10.1016/j.medcli.2017.06.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Revised: 05/29/2017] [Accepted: 06/01/2017] [Indexed: 01/15/2023]
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10
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Delanaye P, Guerber F, Scheen A, Ellam T, Bouquegneau A, Guergour D, Mariat C, Pottel H. Discrepancies between the Cockcroft-Gault and Chronic Kidney Disease Epidemiology (CKD-EPI) Equations: Implications for Refining Drug Dosage Adjustment Strategies. Clin Pharmacokinet 2017; 56:193-205. [PMID: 27417226 DOI: 10.1007/s40262-016-0434-z] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
INTRODUCTION The dosages of many medications require adjustment for renal function. There is debate regarding which equation, the Chronic Kidney Disease Epidemiology (CKD-EPI) equation vs. the Cockcroft-Gault (CG) equation, should be recommended to estimate glomerular filtration rate. METHODS We used a mathematical simulation to determine how patient characteristics influence discrepancies between equations and analyzed clinical data to demonstrate the frequency of such discrepancies in clinical practice. In the simulation, the modifiable variables were sex, age, serum creatinine, and weight. We considered estimated glomerular filtration rate results in mL/min, deindexed for body surface area, because absolute excretory function (rather than per 1.73 m2 body surface area) determines the rate of filtration of a drug at a given plasma concentration. An absolute and relative difference of maximum (±) 10 mL/min and 10 %, respectively, were considered concordant. Clinical data for patients aged over 60 years (n = 9091) were available from one hospital and 25 private laboratories. RESULTS In the simulation, differences between the two equations were found to be influenced by each variable but age and weight had the biggest effect. Clinical sample data demonstrated concordance between CKD-EPI and CG results in 4080 patients (45 %). The majority of discordant results reflected a CG result lower than the CKD-EPI equation. With aging, the CG result became progressively lower than the CKD-EPI result. When weight increased, the opposite occurred. DISCUSSION The choice of equation for excretory function adjustment of drug dosage will have different implications for patients of different ages and body habitus. CONCLUSIONS The optimum equation for drug dosage adjustment should be defined with consideration of individual patient characteristics.
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Affiliation(s)
- Pierre Delanaye
- Division of Nephrology, Dialysis and Transplantation, CHU Sart Tilman, University of Liège (ULg-CHU), 4000, Liège, Belgium.
| | | | - André Scheen
- Division of Clinical Pharmacology, Center for Interdisciplinary Research on Medicines, University of Liège, Liège, Belgium
| | - Timothy Ellam
- Sheffield Kidney Institute, Northern General Hospital and Department of Infection, Immunity and Cardiovascular Science, University of Sheffield, Sheffield, UK
| | - Antoine Bouquegneau
- Division of Nephrology, Dialysis and Transplantation, CHU Sart Tilman, University of Liège (ULg-CHU), 4000, Liège, Belgium
| | - Dorra Guergour
- Biochemistry Laboratory, Grenoble University Hospital, Grenoble, France
| | - Christophe Mariat
- Division of Nephrology, Dialysis, Transplantation and Hypertension, CHU Hôpital Nord, University Jean Monnet, PRES Université de LYON, Saint-Etienne, France
| | - Hans Pottel
- Department of Public Health and Primary Care, KU, Leuven Kulak, Kortrijk, Belgium
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11
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Lutz J, Jurk K, Schinzel H. Direct oral anticoagulants in patients with chronic kidney disease: patient selection and special considerations. Int J Nephrol Renovasc Dis 2017; 10:135-143. [PMID: 28652799 PMCID: PMC5473496 DOI: 10.2147/ijnrd.s105771] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Many patients with chronic kidney disease (CKD) receive anticoagulation or antiplatelet therapy due to atrial fibrillation, coronary artery disease, thromboembolic disease, or peripheral artery disease. The treatment usually includes vitamin K antagonists (VKAs) and/or platelet aggregation inhibitors. The direct oral anticoagulants (DOAC) inhibiting factor Xa or thrombin represent an alternative for VKAs. In patients with acute and chronic kidney disease, caution is warranted, as DOACs can accumulate as they are partly eliminated by the kidneys. Thus, they can potentially increase the bleeding risk in patients with CKD. In patients with an estimated glomerular filtration rate (eGFR) above 60 mL/min, DOACs can be used safely with greater efficacy and safety as compared to VKAs. In patients with CKD 3, DOACs are as effective as VKAs with a lower bleeding rate. The more the renal function declines, the lower is the advantage of DOACs over VKAs. Thus, use of DOACs should be avoided in patients with an eGFR below 30 mL/min, particularly, the compounds with a high renal elimination. Available data suggest that DOACs can also be used safely in older patients. In this review, use of DOACs in comparison with VKAs, heparins, and heparinoids, together with special considerations in patients with impaired renal function will be discussed.
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Affiliation(s)
- Jens Lutz
- Nephrology Department, I. Medizinische Klinik und Poliklinik
| | - Kerstin Jurk
- Center for Thrombosis and Hemostasis, Universitätsmedizin Mainz
| | - Helmut Schinzel
- Cardiopraxis Mainz, Gerinnungsambulanz, MED Facharztzentrum, Mainz, Germany
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12
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Gessoni G, Valverde S, Gessoni F, Valle L, Bortolotti M, Lidestri V, Urso M, Valle R. Glomerular filtration rate assessed by using creatinine and cystatin in patients treated with dabigatran. ACTA ACUST UNITED AC 2016. [DOI: 10.1007/s13631-016-0136-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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13
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Cartet-Farnier E, Goutelle-Audibert L, Maire P, De la Gastine B, Goutelle S. Implications of using the MDRD or CKD-EPI equation instead of the Cockcroft-Gault equation for estimating renal function and drug dosage adjustment in elderly patients. Fundam Clin Pharmacol 2016; 31:110-119. [PMID: 27599753 DOI: 10.1111/fcp.12241] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Revised: 08/30/2016] [Accepted: 09/02/2016] [Indexed: 11/30/2022]
Abstract
The objectives of this study were to compare the estimations of renal function obtained with six equations, including the Cockcroft-Gault (CG), Modification of Diet in Renal Disease (MDRD), and Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equations and to evaluate the implication of using other equations for drug dosing in elderly patients in place of CG. An observational prospective study was conducted over 6 months in two geriatric hospitals with inclusions of all hospitalized inpatients. A list of 36 drugs for which recommendations of dosage adjustment for renal function were mentioned in the manufacturer dosing guidelines was used to compare the implications of using the various equations for drug dosing. A total of 249 patients with a mean age of 83.6 years were included. Mean estimates of renal function from the CG, MDRD, and CKD-EPI equations were 51.3 ± 23.5 mL/min, 72.2 ± 35.2, and 64.3 ± 22.5 mL/min/1.73 m2 , respectively (P < 0.001). Twenty percent of patients had at least one drug for which the dose was not appropriately adjusted to renal function. The use of the MDRD and CKD-EPI equations in place of the CG equation was associated with dosage discrepancy in 20-25% of patients and 15% of drug orders, resulting in potential overdosage in 95% of cases. Use of MDRD or CKD-EPI equations results in higher estimates of renal function and may have important implications for drug dosing decision and drug safety in elderly patients. The best way is to directly measure the drug effect or its concentration when it is possible to do so.
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Affiliation(s)
- Elodie Cartet-Farnier
- Groupement Hospitalier de Gériatrie, Service pharmaceutique, Hospices Civils de Lyon, 136 rue du Commandant Charcot, 69005, Lyon, France
| | - Laetitia Goutelle-Audibert
- Service pharmaceutique, Centre Hospitalier de Saint Laurent de Chamousset, Le Grand Jardin, Chemin du Grand Jardin, 69930, Saint-Laurent de Chamousset, France
| | - Pascal Maire
- Groupement Hospitalier de Gériatrie, Service pharmaceutique, Hospices Civils de Lyon, 136 rue du Commandant Charcot, 69005, Lyon, France.,UMR CNRS 5558, Laboratoire de Biométrie et Biologie Evolutive, Université Lyon 1, 43 bd du 11 novembre 1918, 69622, Villeurbanne, France
| | - Blandine De la Gastine
- Groupement Hospitalier de Gériatrie, Médecine Gériatrique, Hospices Civils de Lyon, Lyon, France
| | - Sylvain Goutelle
- Groupement Hospitalier de Gériatrie, Service pharmaceutique, Hospices Civils de Lyon, 136 rue du Commandant Charcot, 69005, Lyon, France.,UMR CNRS 5558, Laboratoire de Biométrie et Biologie Evolutive, Université Lyon 1, 43 bd du 11 novembre 1918, 69622, Villeurbanne, France.,Faculté de Pharmacie de Lyon, Université Lyon 1, 8 avenue Rockefeller, 69373, Lyon Cedex 08, France
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14
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Drug therapy management in patients with renal impairment: how to use creatinine-based formulas in clinical practice. Eur J Clin Pharmacol 2016; 72:1433-1439. [PMID: 27568310 PMCID: PMC5110609 DOI: 10.1007/s00228-016-2113-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Accepted: 07/27/2016] [Indexed: 01/26/2023]
Abstract
Purpose The use of estimated glomerular filtration rate (eGFR) in daily clinical practice. Methods eGFR is a key component in drug therapy management (DTM) in patients with renal impairment. eGFR is routinely reported by laboratories whenever a serum creatinine testing is ordered. In this paper, we will discuss how to use eGFR knowing the limitations of serum creatinine-based formulas. Results Before starting a renally excreted drug, an equally effective drug which can be used more safely in patients with renal impairment should be considered. If a renally excreted drug is needed, the reliability of the eGFR should be assessed and when needed, a 24-h urine creatinine clearance collection should be performed. After achieving the best approximation of the true GFR, we suggest a gradual drug dose adaptation according to the renal function. A different approach for drugs with a narrow therapeutic window (NTW) is recommended compared to drugs with a broad therapeutic window. For practical purposes, a therapeutic window of 5 or less was defined as a NTW and a list of NTW drugs is presented. Considerations about the drug dose may be different at the start of the therapy or during the therapy and depending on the indication. Monitoring effectiveness and adverse drug reactions are important, especially for NTW drugs. Dose adjustment should be based on an ongoing assessment of clinical status and risk versus the benefit of the used regimen. Conclusion When determining the most appropriate dosing regimen serum creatinine-based formulas should never be used naively but always in combination with clinical and pharmacological assessment of the individual patient. Electronic supplementary material The online version of this article (doi:10.1007/s00228-016-2113-2) contains supplementary material, which is available to authorized users.
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Brunetti L, Sanchez-Catanese B, Kagan L, Wen X, Liu M, Buckley B, Luyendyk JP, Aleksunes LM. Evaluation of the chromogenic anti-factor IIa assay to assess dabigatran exposure in geriatric patients with atrial fibrillation in an outpatient setting. Thromb J 2016; 14:10. [PMID: 27158246 PMCID: PMC4858862 DOI: 10.1186/s12959-016-0084-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Accepted: 04/22/2016] [Indexed: 01/08/2023] Open
Abstract
Background Dabigatran etexilate may be underutilized in geriatric patients because of inadequate clinical experience in individuals with severe renal impairment and post-marketing reports of bleeding events. Assessing the degree of anticoagulation may improve the risk:benefit ratio for dabigatran. The aim of this prospective study was to identify whether therapeutic drug monitoring of dabigatran anticoagulant activity using a chromogenic anti-factor IIa assay is a viable option for therapy individualization. Methods Plasma dabigatran concentration was assessed in nine patients with nonvalvular atrial fibrillation aged 75 years or older currently receiving dabigatran etexilate for prevention of stroke, using an anti-factor IIa chromogenic assay and HPLC-MS/MS. Trough concentrations were evaluated on two separate occasions to determine intrapatient variation. Results Blood was collected at 13.1 ± 2.3 h (mean ± SD) post dose from patients prescribed dabigatran etexilate 150 mg twice daily (5/9 patients) or dabigatran etexilate 75 mg twice daily (4/9 patients). Results from the anti-factor IIa chromogenic assay correlated with dabigatran concentrations as assessed by HPLC-MS/MS (r2 = 0.81, n = 16). There was no correlation between dabigatran trough values taken at separate visits (r2 = 0.002, n = 7). Furthermore, there was no correlation found between the drug concentrations and patients’ renal function determined by both creatinine and cystatin-C based equations. None of the patients enrolled in the study were in the proposed on-therapy trough range during at least one visit. Conclusion The chromogenic anti-factor IIa assay demonstrated similar performance in quantifying dabigatran plasma trough concentrations to HPLC-MS/MS. Single measurement of dabigatran concentration by either of two methods during routine visits may not be reliable in identifying patients at consistently low or high dabigatran concentrations. Electronic supplementary material The online version of this article (doi:10.1186/s12959-016-0084-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Luigi Brunetti
- Department of Pharmacy Practice and Administration, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, USA
| | - Betty Sanchez-Catanese
- Department of Medicine, Robert Wood Johnson University Hospital-Somerset, Somerville, USA
| | - Leonid Kagan
- Department of Pharmaceutics, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, USA
| | - Xia Wen
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, USA
| | - Min Liu
- Chemical Analytical Core Laboratory, Environmental and Occupational Health Sciences Institute, Rutgers, The State University of New Jersey, Piscataway, USA
| | - Brian Buckley
- Chemical Analytical Core Laboratory, Environmental and Occupational Health Sciences Institute, Rutgers, The State University of New Jersey, Piscataway, USA
| | - James P Luyendyk
- Pathology and Diagnostic Inv., Michigan State University, East Lansing, USA
| | - Lauren M Aleksunes
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, USA
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Otsui K, Gorog DA, Yamamoto J, Yoshioka T, Iwata S, Suzuki A, Ozawa T, Takei A, Inoue N. Global Thrombosis Test - a possible monitoring system for the effects and safety of dabigatran. Thromb J 2015; 13:39. [PMID: 26648789 PMCID: PMC4672538 DOI: 10.1186/s12959-015-0069-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2015] [Accepted: 09/08/2015] [Indexed: 01/17/2023] Open
Abstract
Background Dabigatran is an alternative to warfarin (WF) for the thromboprophylaxis of stroke in patients with non-valvular atrial fibrillation (NVAF). The advantage of dabigatran over WF is that monitoring is not required; however, a method to monitor the effect and the safety of dabigatran is not currently available. The Global Thrombosis Test (GTT) is a novel method to assess both clot formation and lysis activities under physiological conditions. Objective The aim of this study was to evaluate whether treatment with dabigatran might affect shear-induced thrombi (occlusion time [OT], sec) by the GTT, and to investigate the possibility that the GTT could be useful as a monitoring system for dabigatran. Patients/Methods The study population consisted of 50 volunteers and 43 NVAF patients on WF therapy, who were subsequently switched to dabigatran. Using the GTT, the thrombotic status was assessed one day before and 1 month after switching anticoagulation from WF to dabigatran. Results The OT was 524.9 ± 17.0 sec in volunteers whereas that of NVAF patients on WF therapy was 581.7 ± 26.3 sec. The switch from WF to dabigatran significantly prolonged OT (784.5 ± 19.3 sec). One patient on WF therapy and 12 patients on dabigatran therapy were shown to have OT > 900 sec. Conclusion The GTT could be used to assess the risk of dabigatran-related bleeding complications.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Nobutaka Inoue
- Kobe Rosai Hospital, Kobe, Japan ; Department of Cardiovascular Medicine, Kobe Rosai Hospital, 4-1-23, Kagoike Touri, Chuo-Ku, Kobe, 651-0053 Japan
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Delanaye P, Flamant M, Cavalier É, Guerber F, Vallotton T, Moranne O, Pottel H, Boffa JJ, Mariat C. [Dosing adjustment and renal function: Which equation(s)?]. Nephrol Ther 2015; 12:18-31. [PMID: 26602880 DOI: 10.1016/j.nephro.2015.07.472] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 07/28/2015] [Accepted: 07/29/2015] [Indexed: 12/18/2022]
Abstract
While the CKD-EPI (for Chronic Kidney Disease Epidemiology) equation is now implemented worldwide, utilization of the Cockcroft formula is still advocated by some physicians for drug dosage adjustment. Justifications for this recommendation are that the Cockcroft formula was preferentially used to determine dose adjustments according to renal function during the development of many drugs, better predicts drugs-related adverse events and decreases the risk of drug overexposure in the elderly. In this opinion paper, we discuss the weaknesses of the rationale supporting the Cockcroft formula and endorse the French HAS (Haute Autorité de santé) recommendation regarding the preferential use of the CKD-EPI equation. When glomerular filtration rate (GFR) is estimated in order to adjust drug dosage, the CKD-EPI value should be re-expressed for the individual body surface area (BSA). Given the difficulty to accurately estimate GFR in the elderly and in individuals with extra-normal BSA, we recommend to prescribe in priority monitorable drugs in those populations or to determine their "true" GFR using a direct measurement method.
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Affiliation(s)
- Pierre Delanaye
- Service de néphrologie, dialyse et transplantation, CHU Sart-Tilman, université de Liège, 4000 Liège, Belgique
| | - Martin Flamant
- Service d'explorations fonctionnelles, hôpital Bichat, AP-HP, université Paris Diderot, Paris, France
| | - Étienne Cavalier
- Service de chimie clinique, CHU Sart-Tilman, université de Liège, 4000 Liège, Belgique
| | - Fabrice Guerber
- Laboratoire Oriade-Vizille, 75, chemin de la Terrasse, 38220 Vizille, France
| | - Thomas Vallotton
- Laboratoire Vialle, Bastia et Syndicat des jeunes biologistes médicaux, 20600 BastiaFrance
| | - Olivier Moranne
- EA 2415, biostatistique, épidémiologie et santé publique, institut universitaire de recherche clinique, université de Montpellier, 34093 Montpellier, France
| | - Hans Pottel
- Department of Primary Care and Public Health at Kulak, KU Leuven Kulak, 8500 Kortrijk, Belgique
| | - Jean-Jacques Boffa
- Inserm 1155, service de néphrologie et dialyse, hôpital Tenon, AP-HP, université Pierre-et-Marie-Curie, 75020 Paris, France
| | - Christophe Mariat
- Service de néphrologie, dialyse et transplantation, hôpital Nord, CHU de Saint-Étienne, université Jean-Monnet, 42055 Saint-Étienne, France.
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Eppenga WL, Wester WN, Derijks HJ, Hoedemakers RMJ, Wensing M, De Smet PAGM, Van Marum RJ. Fluctuation of the renal function after discharge from hospital and its effects on drug dosing in elderly patients--study protocol. BMC Nephrol 2015; 16:95. [PMID: 26149449 PMCID: PMC4492070 DOI: 10.1186/s12882-015-0095-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Accepted: 06/25/2015] [Indexed: 11/10/2022] Open
Abstract
Background Chronic kidney disease (CKD) is associated with an increased mortality rate, risk of cardiovascular events and morbidity. Impaired renal function is common in elderly patients, and their glomerular filtration rate (GFR) should be taken into account when prescribing renally excreted drugs. In a hospital care setting the GFR may fluctuate substantially, so that the renal function group and therefore the recommended dose, can change within a few days. The magnitude and prevalence of the fluctuation of renal function in daily clinical practice and its potential effects on appropriateness of drug prescriptions after discharge from the hospital is unknown. Methods/design This is a prospective observational study. Patients ≥ 70 years with renal impairment (eGFR <60 ml/min/1.73 m2) admitted to a geriatric ward are eligible to participate. Participants undergo blood sample collection to measure serum creatinine level at three time points: at discharge from hospital, 14 days, and 2 months after discharge. At these time points the actual medication of the participants is assessed and the number of incorrect prescriptions according to the Dutch guidelines in relation to their estimated renal function is measured. In addition, for a hypothetical selection of drugs, the need for drug dose adaptation in relation to renal function is measured. The outcome of interest is the percentage of patients that changes from renal function group after discharge from hospital compared to the renal function at discharge. In addition, the percentages of patients whose actual medications are incorrectly prescribed and for the hypothetical selection of drugs that would have required dose adaptation will be determined at discharge, 14 days and 2 months after discharge. For each outcome, risk factors which may lead to increased risk for fluctuation of renal function and/or incorrect drug prescribing will also be identified and analysed. Discussion This study will provide data on changes in renal function in elderly patients after discharge from the hospital with a focus on the medications used. The benefits for healthcare professionals comprise of the creation, adjustment or confirmation of recommendations for the monitoring of the renal function after discharge from hospital of elderly patients.
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Affiliation(s)
- Willemijn L Eppenga
- Radboud University Medical Center, Radboud Institute for Health Sciences, IQ healthcare, Postbus 9101, 114, 6500 HB, Nijmegen, The Netherlands.
| | - Wietske N Wester
- Department of Geriatric Medicine, Jeroen Bosch Hospital, 's-Hertogenbosch, The Netherlands.
| | - Hieronymus J Derijks
- ZANOB, 's-Hertogenbosch, The Netherlands. .,Division of Pharmacoepidemiology and Clinical Pharmacology, Utrecht Institute of Pharmaceutical Sciences, Utrecht, The Netherlands.
| | - Rein M J Hoedemakers
- Laboratory of Clinical Chemistry and Haematology, Jeroen Bosch Hospital, 's-Hertogenbosch, The Netherlands.
| | - Michel Wensing
- Radboud University Medical Center, Radboud Institute for Health Sciences, IQ healthcare, Postbus 9101, 114, 6500 HB, Nijmegen, The Netherlands.
| | - Peter A G M De Smet
- Radboud University Medical Center, Radboud Institute for Health Sciences, IQ healthcare, Postbus 9101, 114, 6500 HB, Nijmegen, The Netherlands. .,Radboud University Medical Center, Department of Pharmacy, Nijmegen, The Netherlands.
| | - Rob J Van Marum
- Department of Geriatric Medicine, Jeroen Bosch Hospital, 's-Hertogenbosch, The Netherlands. .,Department of General Practice and Elderly Care Medicine, VU University Medical Center Amsterdam, Amsterdam, The Netherlands.
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Helldén A, Al-Aieshy F, Bastholm-Rahmner P, Bergman U, Gustafsson LL, Höök H, Sjöviker S, Söderström A, Odar-Cederlöf I. Development of a computerised decisions support system for renal risk drugs targeting primary healthcare. BMJ Open 2015; 5:e006775. [PMID: 26150141 PMCID: PMC4499680 DOI: 10.1136/bmjopen-2014-006775] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
OBJECTIVES To assess general practitioners (GPs) experience from the implementation and use of a renal computerised decision support system (CDSS) for drug dosing, developed for primary healthcare, integrated into the patient's electronic health record (EHR), and building on estimation of the patient's creatinine clearance (ClCG). DESIGN Qualitative research design by a questionnaire and a focus group discussion. SETTING AND PARTICIPANTS Eight GPs at two primary healthcare centres (PHCs). INTERVENTIONS The GP at PHC 1, and the project group, developed and tested the technical solution of the CDSS. Proof-of-concept was tested by seven GPs at PHC 2. They also participated in a group discussion and answered a questionnaire. A web window in the EHR gave drug and dosage in relation to ClCG. Each advice was according to three principles: If? Why? Because. OUTCOME MEASURES (1) The GPs' experience of 'easiness to use' and 'perceived usefulness' at PHC 2, based on loggings of use, answers from a questionnaire using a 5-point Likert scale, and answers from a focus group discussion. (2) The number of patients aged 65 years and older with an estimation of ClCG before and after the implementation of the CDSS. RESULTS The GPs found the CDSS fast, simple and easy to use. They appreciated the automatic presentation of the CICG status on opening the medication list, and the ability to actively look up specific drug recommendations in two steps. The CDSS scored high on the Likert scale. All GPs wanted to continue the use of the CDSS and to recommend it to others. The number of patients with an estimated ClCG increased 1.6-fold. CONCLUSIONS Acceptance of the simple graphical interface of this push and pull renal CDSS was high among the primary care physicians evaluating this proof of concept. The graphical model should be useful for further development of renal decision support systems.
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Affiliation(s)
- Anders Helldén
- Department of Clinical Pharmacology, Karolinska University Hospital, Stockholm, Sweden
- Division of Clinical Pharmacology, Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Fadiea Al-Aieshy
- Department of Clinical Pharmacology, Karolinska University Hospital, Stockholm, Sweden
| | - Pia Bastholm-Rahmner
- Division of Clinical Pharmacology, Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden
- Department of Healthcare Development, Public Healthcare Administration, Stockholm County Council, Stockholm, Sweden
| | - Ulf Bergman
- Department of Clinical Pharmacology, Karolinska University Hospital, Stockholm, Sweden
- Division of Clinical Pharmacology, Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Lars L Gustafsson
- Department of Clinical Pharmacology, Karolinska University Hospital, Stockholm, Sweden
- Division of Clinical Pharmacology, Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Hans Höök
- Department of Healthcare Development, Public Healthcare Administration, Stockholm County Council, Stockholm, Sweden
| | - Susanne Sjöviker
- Department of Healthcare Development, Public Healthcare Administration, Stockholm County Council, Stockholm, Sweden
| | | | - Ingegerd Odar-Cederlöf
- Department of Clinical Pharmacology, Karolinska University Hospital, Stockholm, Sweden
- Division of Clinical Pharmacology, Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden
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Chin PKL, Wright DFB, Zhang M, Wallace MC, Roberts RL, Patterson DM, Jensen BP, Barclay ML, Begg EJ. Correlation between trough plasma dabigatran concentrations and estimates of glomerular filtration rate based on creatinine and cystatin C. Drugs R D 2015; 14:113-23. [PMID: 24797400 PMCID: PMC4070467 DOI: 10.1007/s40268-014-0045-9] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
AIMS Dabigatran is largely cleared by renal excretion. Renal function is thus a major determinant of trough dabigatran concentrations, which correlate with the risk of thromboembolic and haemorrhagic outcomes. Current dabigatran dosing guidelines use the Cockcroft-Gault (CG) equation to gauge renal function, instead of contemporary equations including the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equations employing creatinine (CKD-EPI_Cr), cystatin C (CKD-EPI_Cys) and both renal biomarkers (CKD-EPI_CrCys). METHODS A linear regression model including the dabigatran etexilate maintenance dose rate, relevant interacting drugs and genetic polymorphisms (including CES1), was used to analyse the relationship between the values from each renal function equation and trough steady-state plasma dabigatran concentrations. RESULTS The median dose-corrected trough steady-state plasma dabigatran concentration in 52 patients (38-94 years) taking dabigatran etexilate was 60 µg/L (range 9-279). The dose-corrected trough concentration in a patient on phenytoin and phenobarbitone was >3 standard deviations below the cohort mean. The CG, CKD-EPI_Cr, CKD-EPI_Cys and CKD-EPI_CrCys equations explained (R (2), 95 % CI) 32 % (9-55), 37 % (12-60), 41 % (16-64) and 47 % (20-69) of the variability in dabigatran concentrations between patients, respectively. One-way analysis of variance (ANOVA) comparing the R (2) values for each equation was not statistically significant (p = 0.74). DISCUSSION Estimates of renal function using the four equations accounted for 32-47 % of the variability in dabigatran concentrations between patients. We are the first to provide evidence that co-administration of phenytoin/phenobarbitone with dabigatran etexilate is associated with significantly reduced dabigatran exposure.
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Affiliation(s)
- Paul K L Chin
- Department of Clinical Pharmacology, Christchurch Hospital, 2 Riccarton Avenue, Christchurch, 8011, New Zealand,
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Influence of renal function estimation on pharmacokinetic modeling of vancomycin in elderly patients. Antimicrob Agents Chemother 2015; 59:2986-94. [PMID: 25753640 DOI: 10.1128/aac.04132-14] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Accepted: 03/01/2015] [Indexed: 01/26/2023] Open
Abstract
Vancomycin is a renally excreted drug, and its body clearance correlates with creatinine clearance. However, the renal function estimation equation that best predicts vancomycin clearance has not been established yet. The objective of this study was to compare the abilities of different renal function estimation equations to describe vancomycin pharmacokinetics in elderly patients. The NPAG algorithm was used to perform population pharmacokinetic analysis of vancomycin concentrations in 78 elderly patients. Six pharmacokinetic models of vancomycin clearance were built, based on the following equations: Cockcroft-Gault (CG), Jelliffe (JEL), Modification of Diet in Renal Disease (MDRD), Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) (both in milliliters per minute per 1.73 m(2)), and modified MDRD and CKD-EPI equations (both in milliliters per minute). Goodness-of-fit and predictive performances of the six PK models were compared in a learning set (58 subjects) and a validation set (20 patients). Final analysis was performed to estimate population parameters in the entire population. In the learning step, the MDRD-based model best described the data, but the CG- and JEL-based models were the least biased. The mean weighted errors of prediction were significantly different between the six models (P = 0.0071). In the validation group, predictive performances were not significantly different. However, the use of a renal function estimation equation different from that used in the model building could significantly alter predictive performance. The final analysis showed important differences in parameter distributions and AUC estimation across the six models. This study shows that methods used to estimate renal function should not be considered interchangeable for pharmacokinetic modeling and model-based estimation of vancomycin concentrations in elderly patients.
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Hudson JQ, Bean JR, Burger CF, Stephens AK, McFarland MS. Estimated glomerular filtration rate leads to higher drug dose recommendations in the elderly compared with creatinine clearance. Int J Clin Pract 2015; 69:313-20. [PMID: 25648558 DOI: 10.1111/ijcp.12532] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Accepted: 07/30/2014] [Indexed: 11/30/2022] Open
Abstract
PURPOSE The elderly are at risk for adverse drug events because of inappropriate dosing of renally eliminated medications. The purpose of this study was to evaluate differences in estimates of kidney function and recommended doses of select medications in the elderly using the Modification of Diet in Renal Disease (MDRD) or the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equations compared with the Cockcroft-Gault (CG) equation. METHODS Patients 65 years of age and older were included in this retrospective, observational analysis. Kidney function was estimated by CG, MDRD and CKD-EPI equations for all patients and by age category (65-69, 70-79, 80-89 and 90-100 years). Differences in estimates and dosing of allopurinol, enoxaparin, gabapentin, piperacillin/tazobactam and sulfamethoxazole/trimethoprim using the MDRD and CKD-EPI compared with the CG were assessed. RESULTS In the 4160 patients (98% male, mean age 74 ± 7 years), the MDRD and CKD-EPI estimates were significantly higher than CG estimates for all patients and by age category (p < 0.001). Dosing discordance was predominantly because of a higher dose recommended by MDRD and CKD-EPI estimates compared with CG. Discordance was highest with gabapentin (27%), the medication with the greatest number of dosing stratifications by estimated kidney function, and increased by 66% from the youngest to the oldest age category. CONCLUSIONS Until newer equations are used uniformly to develop dosing nomograms, it is prudent to adopt a process for drug dosing in the elderly that is more conservative than eGFR based dosing, but that considers the potential for underestimating kidney function with the CG equation.
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Affiliation(s)
- J Q Hudson
- The University of Tennessee College of Pharmacy, Memphis, TN, USA
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Management of non-vitamin K antagonist oral anticoagulants in the perioperative setting. BIOMED RESEARCH INTERNATIONAL 2014; 2014:385014. [PMID: 25276784 PMCID: PMC4168027 DOI: 10.1155/2014/385014] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Accepted: 08/05/2014] [Indexed: 12/29/2022]
Abstract
The field of oral anticoagulation has evolved with the arrival of non-vitamin K antagonist oral anticoagulants (NOACs) including an anti-IIa agent (dabigatran etexilate) and anti-Xa agents (rivaroxaban and apixaban). The main specificities of these drugs are predictable pharmacokinetics and pharmacodynamics but special attention should be paid in the elderly, in case of renal dysfunction and in case of emergency. In addition, their perioperative management is challenging, especially with the absence of specific antidotes. Effectively, periods of interruption before surgery or invasive procedures depend on half-life and keeping a permanent balance between bleeding and thromboembolic risks. In addition, few data regarding the link between plasma concentrations and their effects are provided. Routine laboratory tests are altered by NOACs and quantitative measurements are not widely performed. This paper provides a review on the management of NOACs in the perioperative setting, including the estimation of the bleeding and thrombotic risk, the periods of interruption, the indication of heparin bridging, the usefulness of laboratory tests before surgery or invasive procedure, and the time of resuming. Most data are based on expert's opinions.
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Preventive strategies against bleeding due to nonvitamin K antagonist oral anticoagulants. BIOMED RESEARCH INTERNATIONAL 2014; 2014:616405. [PMID: 25032218 PMCID: PMC4084591 DOI: 10.1155/2014/616405] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Accepted: 04/14/2014] [Indexed: 01/20/2023]
Abstract
Dabigatran etexilate (DE), rivaroxaban, and apixaban are nonvitamin K antagonist oral anticoagulants (NOACs) that have been compared in clinical trials with existing anticoagulants (warfarin and enoxaparin) in several indications for the prevention and treatment of thrombotic events. All NOACs presented bleeding events despite a careful selection and control of patients. Compared with warfarin, NOACs had a decreased risk of intracranial hemorrhage, and apixaban and DE (110 mg BID) had a decreased risk of major bleeding from any site. Rivaroxaban and DE showed an increased risk of major gastrointestinal bleeding compared with warfarin. Developing strategies to minimize the risk of bleeding is essential, as major bleedings are reported in clinical practice and specific antidotes are currently not available. In this paper, the following preventive approaches are reviewed: improvement of appropriate prescription, identification of modifiable bleeding risk factors, tailoring NOAC's dose, dealing with a missed dose as well as adhesion to switching, bridging and anesthetic procedures.
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25
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Kallner A. Estimated GFR. Comparison of five algorithms:implications for drug dosing. J Clin Pathol 2014; 67:609-13. [DOI: 10.1136/jclinpath-2014-202245] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Neuman G, Nulman I, Adeli K, Koren G, Colantonio DA, Helldén A. Implications of serum creatinine measurements on GFR estimation and vancomycin dosing in children. J Clin Pharmacol 2014; 54:785-91. [PMID: 24596064 DOI: 10.1002/jcph.281] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2013] [Accepted: 02/14/2014] [Indexed: 11/08/2022]
Abstract
BACKGROUND Different serum creatinine (sCr) assays may obtain different values in the same patient, causing discrepancies in estimated glomerular filtration rate (eGFR) and sCr-based vancomycin dosing calculations. OBJECTIVE To identify potential discrepancies in sCr concentrations obtained by different assays, the compensated Jaffe (sCr-Jaffe) and the enzymatic (sCr-enz), and to compare between the eGFR and vancomycin daily dose, based on these sCr values. METHOD sCr-Jaffe and, sCr-enz concentrations of 890 healthy children, aged 1-18 years, were available from the Canadian Laboratory Initiative in Pediatric Reference Intervals study in Ontario. For each subject, eGFR (eGFR-Jaffe, eGFR-enz) was calculated using the revised Schwartz equation, and vancomycin daily dose (Vdose-Jaffe, Vdose-enz) was calculated using a sCr-based pharmacokinetic model. RESULT Significant, age-related differences were found in sCr concentrations, and in subsequent eGFR and Vdose, between the two assays. In children aged 1-5 years, mean sCr-Jaffe was higher than sCr-enz (44.0 ± 5.0 vs. 27.7 ± 7.3 μmol/L, P < 0.001), leading to lower eGFR-Jaffe (83.2 ± 9.0 vs. 137.9 ± 27.1 mL/min/1.73m2, P < 0.001) and lower Vdose-Jaffe (44.7 ± 2.5 vs. 53.5 ± 5.1 mg/kg/24 h, P < 0.001). CONCLUSION Based on these findings, young children may be at risk for vancomycin under-treatment. Further research is needed to define the more accurate sCr assay in young children treated with renally excreted drugs.
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Affiliation(s)
- Gal Neuman
- Division of Clinical Pharmacology & Toxicology, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
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Abstract
During recent years, three new anticoagulants (dabigatran, rivaroxaban and apixaban) have been introduced to the market, probably with one more anticoagulant (edoxaban) in the next 2 years. This review is not intended to compare the efficacy and risks of these new agents, but rather to detail the advantages and limitations. The pharmacokinetic characteristics of these drugs have few drug and food interactions, predictable dose responses, and rapid onset and offset, thus resulting in simplified management of the patient requiring anticoagulant therapy. No routine laboratory monitoring is required. A somewhat unexpected, but exciting observation involving the new anticoagulants, is the uniform reduction in intracranial bleeding by one-half compared with warfarin. The potential limitations of the new anticoagulants include uncertainty regarding assessment of drug levels, safe drug levels for major surgery, management of major bleeding, renal dependence, multiple dose regimens, adherence in the absence of frequent monitoring and unknown, rare side effects that were not captured in the trials. This review should clarify some of these concerns.
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Affiliation(s)
- S Schulman
- Department of Medicine, McMaster University and Thrombosis and Atherosclerosis Research Institute, Hamilton, ON, Canada; Karolinska Institutet, Stockholm, Sweden
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Majeed A, Hwang HG, Connolly SJ, Eikelboom JW, Ezekowitz MD, Wallentin L, Brueckmann M, Fraessdorf M, Yusuf S, Schulman S. Management and outcomes of major bleeding during treatment with dabigatran or warfarin. Circulation 2013; 128:2325-32. [PMID: 24081972 DOI: 10.1161/circulationaha.113.002332] [Citation(s) in RCA: 218] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
BACKGROUND The aim of this study was to compare the management and prognosis of major bleeding in patients treated with dabigatran or warfarin. METHODS AND RESULTS Two independent investigators reviewed bleeding reports from 1034 individuals with 1121 major bleeds enrolled in 5 phase III trials comparing dabigatran with warfarin in 27 419 patients treated for 6 to 36 months. Patients with major bleeds on dabigatran (n=627 of 16 755) were older, had lower creatinine clearance, and more frequently used aspirin or non-steroid anti-inflammatory agents than those on warfarin (n=407 of 10 002). The 30-day mortality after the first major bleed tended to be lower in the dabigatran group (9.1%) than in the warfarin group (13.0%; pooled odds ratio, 0.68; 95% confidence interval, 0.46-1.01; P=0.057). After adjustment for sex, age, weight, renal function, and concomitant antithrombotic therapy, the pooled odds ratio for 30-day mortality with dabigatran versus warfarin was 0.66 (95% confidence interval, 0.44-1.00; P=0.051). Major bleeds in dabigatran patients were more frequently treated with blood transfusions (423/696, 61%) than bleeds in warfarin patients (175/425, 42%; P<0.001) but less frequently with plasma (dabigatran, 19.8%; warfarin, 30.2%; P<0.001). Patients who experienced a bleed had shorter stays in the intensive care unit if they had previously received dabigatran (mean 1.6 nights) compared with those who had received warfarin (mean 2.7 nights; P=0.01). CONCLUSIONS Patients who experienced major bleeding on dabigatran required more red cell transfusions but received less plasma, required a shorter stay in intensive care, and had a trend to lower mortality compared with those who had major bleeding on warfarin. CLINICAL TRIAL REGISTRATION URL http://www.ClinicalTrials.gov. Unique identifiers: NCT00262600, NCT00291330, NCT00680186, NCT00329238 and NCT00558259.
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Affiliation(s)
- Ammar Majeed
- Coagulation Unit, Hematology Center, Karolinska University Hospital and Karolinska Institute, Stockholm, Sweden (A.M., S.S.); the Department of Medicine, Soonchunhyang University Gumi's Hospital, North Kyungsang Province, South Korea (H.-G-H.); McMaster University, Population Health Research Institute, Hamilton, ON, Canada (S.J.C., J.W.E., S.Y.); Lankenau Medical Center, Thomas Jefferson Medical College, Wynnewood, PA (M.D.E.); Uppsala Clinical Research Center and Department of Medical Sciences, Uppsala University, Uppsala, Sweden (L.W.); Boehringer Ingelheim Pharma GmbH & Co KG, Ingelheim, Germany (M.B., M.F.); Faculty of Medicine Mannheim, University of Heidelberg, Mannheim, Germany (M.B.); and the Department of Medicine, McMaster University and Thrombosis and Atherosclerosis Research Institute, Hamilton, ON, Canada (S.S.)
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Maccallum PK, Mathur R, Hull SA, Saja K, Green L, Morris JK, Ashman N. Patient safety and estimation of renal function in patients prescribed new oral anticoagulants for stroke prevention in atrial fibrillation: a cross-sectional study. BMJ Open 2013; 3:e003343. [PMID: 24078751 PMCID: PMC3787476 DOI: 10.1136/bmjopen-2013-003343] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2013] [Revised: 08/08/2013] [Accepted: 08/09/2013] [Indexed: 02/04/2023] Open
Abstract
OBJECTIVE In clinical trials of dabigatran and rivaroxaban for stroke prevention in atrial fibrillation (AF), drug eligibility and dosing were determined using the Cockcroft-Gault equation to estimate creatine clearance as a measure of renal function. This cross-sectional study aimed to compare whether using estimated glomerular filtration rate (eGFR) by the widely available and widely used Modified Diet in Renal Disease (MDRD) equation would alter prescribing or dosing of the renally excreted new oral anticoagulants. PARTICIPANTS Of 4712 patients with known AF within a general practitioner-registered population of 930 079 in east London, data were available enabling renal function to be calculated by both Cockcroft-Gault and MDRD methods in 4120 (87.4%). RESULTS Of 4120 patients, 2706 were <80 years and 1414 were ≥80 years of age. Among those ≥80 years, 14.9% were ineligible for dabigatran according to Cockcroft-Gault equation but would have been judged eligible applying MDRD method. For those <80 years, 0.8% would have been incorrectly judged eligible for dabigatran and 5.3% would have received too high a dose. For rivaroxaban, 0.3% would have been incorrectly judged eligible for treatment and 13.5% would have received too high a dose. CONCLUSIONS Were the MDRD-derived eGFR to be used instead of Cockcroft-Gault in prescribing these new agents, many elderly patients with AF would either incorrectly become eligible for them or would receive too high a dose. Safety has not been established using the MDRD equation, a concern since the risk of major bleeding would be increased in patients with unsuspected renal impairment. Given the potentially widespread use of these agents, particularly in primary care, regulatory authorities and drug companies should alert UK doctors of the need to use the Cockcroft-Gault formula to calculate eligibility for and dosing of the new oral anticoagulants in elderly patients with AF and not rely on the MDRD-derived eGFR.
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Affiliation(s)
- Peter K Maccallum
- Wolfson Institute of Preventive Medicine, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
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Thürmann P. In reply. DEUTSCHES ARZTEBLATT INTERNATIONAL 2013; 110:541-542. [PMID: 24069077 PMCID: PMC3782023 DOI: 10.3238/arztebl.2013.0541c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Affiliation(s)
- Petra Thürmann
- *Philipp Klee-Institut für Klinische Pharmakologie, Helios Klinikum Wuppertal, Lehrstuhl für Klinische Pharmakologie, Universität Witten/Herdecke,
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Mikuni M, Fujii S, Yaoeda H. [Stereophotography of the ocular fundus. 2. Observation method]. Thromb J 1969; 12:24. [PMID: 25750588 PMCID: PMC4351835 DOI: 10.1186/1477-9560-12-24] [Citation(s) in RCA: 38] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Accepted: 10/06/2014] [Indexed: 01/09/2023] Open
Abstract
Traditional anticoagulant agents such as vitamin K antagonists (VKAs), unfractionated heparin (UFH), low molecular weight heparins (LMWHs) and fondaparinux have been widely used in the prevention and treatment of thromboembolic diseases. However, these agents are associated with limitations, such as the need for regular coagulation monitoring (VKAs and UFH) or a parenteral route of administration (UFH, LMWHs and fondaparinux). Several non-VKA oral anticoagulants (NOACs) are now widely used in the prevention and treatment of thromboembolic diseases and in stroke prevention in non-valvular atrial fibrillation. Unlike VKAs, NOACs exhibit predictable pharmacokinetics and pharmacodynamics. They are therefore usually given at fixed doses without routine coagulation monitoring. However, in certain patient populations or special clinical circumstances, measurement of drug exposure may be useful, such as in suspected overdose, in patients experiencing a hemorrhagic or thromboembolic event during the treatment’s period, in those with acute renal failure, in patients who require urgent surgery or in case of an invasive procedure. This article aims at providing guidance on laboratory testing of classic anticoagulants and NOACs.
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