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Gosselin RC, Cuker A. Assessing Direct Oral Anticoagulants in the Clinical Laboratory. Clin Lab Med 2024; 44:551-562. [PMID: 39089758 DOI: 10.1016/j.cll.2024.04.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/04/2024]
Abstract
Direct oral anticoagulants (DOACs) have significant advantages over vitamin K antagonists including lack of need for routine laboratory monitoring. However, assessment of DOAC effect and concentration may be important to guide clinical management including need for DOAC reversal, particularly in acute or emergent situations. In this manuscript, the authors describe tests to screen for DOAC presence and tests that have demonstrated equivalence to gold standard testing for quantifying DOAC exposure. They also discuss the effect of DOACs on other coagulation assays and strategies for monitoring unfractionated heparin in patients with concomitant DOAC exposure.
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Affiliation(s)
- Robert C Gosselin
- Thrombosis and Hemostasis Center, University of California, Davis Health System, Sacramento, CA 95817, USA.
| | - Adam Cuker
- Department of Medicine and Department of Pathology & Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania Hospital of the University of Pennsylvania, Philadelphia, PA 19104, USA
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De Simone B, Chouillard E, Podda M, Pararas N, de Carvalho Duarte G, Fugazzola P, Birindelli A, Coccolini F, Polistena A, Sibilla MG, Kruger V, Fraga GP, Montori G, Russo E, Pintar T, Ansaloni L, Avenia N, Di Saverio S, Leppäniemi A, Lauretta A, Sartelli M, Puzziello A, Carcoforo P, Agnoletti V, Bissoni L, Isik A, Kluger Y, Moore EE, Romeo OM, Abu-Zidan FM, Beka SG, Weber DG, Tan ECTH, Paolillo C, Cui Y, Kim F, Picetti E, Di Carlo I, Toro A, Sganga G, Sganga F, Testini M, Di Meo G, Kirkpatrick AW, Marzi I, déAngelis N, Kelly MD, Wani I, Sakakushev B, Bala M, Bonavina L, Galante JM, Shelat VG, Cobianchi L, Mas FD, Pikoulis M, Damaskos D, Coimbra R, Dhesi J, Hoffman MR, Stahel PF, Maier RV, Litvin A, Latifi R, Biffl WL, Catena F. The 2023 WSES guidelines on the management of trauma in elderly and frail patients. World J Emerg Surg 2024; 19:18. [PMID: 38816766 PMCID: PMC11140935 DOI: 10.1186/s13017-024-00537-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Accepted: 02/26/2024] [Indexed: 06/01/2024] Open
Abstract
BACKGROUND The trauma mortality rate is higher in the elderly compared with younger patients. Ageing is associated with physiological changes in multiple systems and correlated with frailty. Frailty is a risk factor for mortality in elderly trauma patients. We aim to provide evidence-based guidelines for the management of geriatric trauma patients to improve it and reduce futile procedures. METHODS Six working groups of expert acute care and trauma surgeons reviewed extensively the literature according to the topic and the PICO question assigned. Statements and recommendations were assessed according to the GRADE methodology and approved by a consensus of experts in the field at the 10th international congress of the WSES in 2023. RESULTS The management of elderly trauma patients requires knowledge of ageing physiology, a focused triage, including drug history, frailty assessment, nutritional status, and early activation of trauma protocol to improve outcomes. Acute trauma pain in the elderly has to be managed in a multimodal analgesic approach, to avoid side effects of opioid use. Antibiotic prophylaxis is recommended in penetrating (abdominal, thoracic) trauma, in severely burned and in open fractures elderly patients to decrease septic complications. Antibiotics are not recommended in blunt trauma in the absence of signs of sepsis and septic shock. Venous thromboembolism prophylaxis with LMWH or UFH should be administrated as soon as possible in high and moderate-risk elderly trauma patients according to the renal function, weight of the patient and bleeding risk. A palliative care team should be involved as soon as possible to discuss the end of life in a multidisciplinary approach considering the patient's directives, family feelings and representatives' desires, and all decisions should be shared. CONCLUSIONS The management of elderly trauma patients requires knowledge of ageing physiology, a focused triage based on assessing frailty and early activation of trauma protocol to improve outcomes. Geriatric Intensive Care Units are needed to care for elderly and frail trauma patients in a multidisciplinary approach to decrease mortality and improve outcomes.
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Affiliation(s)
- Belinda De Simone
- Department of Emergency Minimally Invasive Surgery, Academic Hospital of Villeneuve St Georges, Villeneuve St Georges, France.
- Department of General Minimally Invasive Surgery, Infermi Hospital, AUSL Romagna, Rimini, Italy.
- General Surgery Department, American Hospital of Paris, Paris, France.
| | - Elie Chouillard
- General Surgery Department, American Hospital of Paris, Paris, France
| | - Mauro Podda
- Department of Surgical Science, Unit of Emergency Surgery, University of Cagliari, Cagliari, Italy
| | - Nikolaos Pararas
- 3rd Department of Surgery, Attikon General Hospital, National and Kapodistrian University of Athens (NKUA), Athens, Greece
| | | | - Paola Fugazzola
- Unit of General Surgery I, IRCCS San Matteo Hospital of Pavia, University of Pavia, Pavia, Italy
| | | | | | - Andrea Polistena
- Department of Surgery, Policlinico Umberto I Roma, Sapienza University, Rome, Italy
| | - Maria Grazia Sibilla
- Department of Surgery, Unit of General Surgery, University Hospital of Ferrara and University of Ferrara, Ferrara, Italy
| | - Vitor Kruger
- Division of Trauma Surgery, School of Medical Sciences, University of Campinas, Campinas, Brazil
| | - Gustavo P Fraga
- Division of Trauma Surgery, School of Medical Sciences, University of Campinas, Campinas, Brazil
| | - Giulia Montori
- Unit of General and Emergency Surgery, Vittorio Veneto Hospital, Via C. Forlanini 71, 31029, Vittorio Veneto, TV, Italy
| | - Emanuele Russo
- Department of Anesthesia, Level I, Trauma Center, Bufalini Hospital, Cesena, Italy
| | - Tadeja Pintar
- UMC Ljubljana and Medical Faculty Ljubljana, Ljubljana, Slovenia
| | - Luca Ansaloni
- New Zealand Blood Service, Christchurch, New Zealand
| | - Nicola Avenia
- Endocrine Surgical Unit - University of Perugia, Terni, Italy
| | - Salomone Di Saverio
- General Surgery Unit, Madonna del Soccorso Hospital, AST Ascoli Piceno, San Benedetto del Tronto, Italy
| | - Ari Leppäniemi
- Division of Emergency Surgery, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
| | - Andrea Lauretta
- Department of Surgical Oncology, Centro Di Riferimento Oncologico Di Aviano IRCCS, Aviano, Italy
| | - Massimo Sartelli
- Department of General Surgery, Macerata Hospital, Macerata, Italy
| | - Alessandro Puzziello
- Dipartimento di Medicina, Chirurgia e Odontoiatria, Campus Universitario di Baronissi (SA) - Università di Salerno, AOU San Giovanni di Dio e Ruggi di Aragona, Salerno, Italy
| | - Paolo Carcoforo
- Department of Surgery, Unit of General Surgery, University Hospital of Ferrara and University of Ferrara, Ferrara, Italy
| | - Vanni Agnoletti
- Department of Anesthesia, Level I, Trauma Center, Bufalini Hospital, Cesena, Italy
| | - Luca Bissoni
- Department of Anesthesia, Level I, Trauma Center, Bufalini Hospital, Cesena, Italy
| | - Arda Isik
- Istanbul Medeniyet University, Istanbul, Turkey
| | - Yoram Kluger
- Department of General Surgery, Rambam Health Care Campus, Haifa, Israel
| | - Ernest E Moore
- Ernest E Moore Shock Trauma Center at Denver Health, University of Colorado, Denver, CO, USA
| | - Oreste Marco Romeo
- Bronson Methodist Hospital/Western Michigan University, Kalamazoo, MI, USA
| | - Fikri M Abu-Zidan
- Department of Surgery, College of Medicine and Health Sciences, United Arab Emirates University, Al‑Ain, United Arab Emirates
| | | | - Dieter G Weber
- Department of General Surgery, Royal Perth Hospital and The University of Western Australia, Perth, Australia
| | - Edward C T H Tan
- Department of Surgery, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Ciro Paolillo
- Emergency Department, Ospedale Civile Maggiore, Verona, Italy
| | - Yunfeng Cui
- Department of Surgery, Tianjin Nankai Hospital, Nankai Clinical School of Medicine, Tianjin Medical University, Tianjin, China
| | - Fernando Kim
- University of Colorado Anschutz Medical Campus, Denver, CO, 80246, USA
| | - Edoardo Picetti
- Department of Anesthesia and Intensive Care, Parma University Hospital, Parma, Italy
| | - Isidoro Di Carlo
- Department of Surgical Sciences and Advanced Technologies, General Surgery Cannizzaro Hospital, University of Catania, Catania, Italy
| | - Adriana Toro
- Department of Surgical Sciences and Advanced Technologies, General Surgery Cannizzaro Hospital, University of Catania, Catania, Italy
| | - Gabriele Sganga
- Fondazione Policlinico Universitario A. Gemelli IRCCS, Catholic University, Rome, Italy
| | - Federica Sganga
- Department of Geriatrics, Ospedale Sant'Anna, Ferrara, Italy
| | - Mario Testini
- Department of Precision and Regenerative Medicine and Ionian Area, Unit of Academic General Surgery, University of Bari "A. Moro", Bari, Italy
| | - Giovanna Di Meo
- Department of Precision and Regenerative Medicine and Ionian Area, Unit of Academic General Surgery, University of Bari "A. Moro", Bari, Italy
| | - Andrew W Kirkpatrick
- Departments of Surgery and Critical Care Medicine, University of Calgary, Foothills Medical Centre, Calgary, AB, Canada
| | - Ingo Marzi
- Department of Trauma, Hand and Reconstructive Surgery, University Hospital Frankfurt, Frankfurt, Germany
| | - Nicola déAngelis
- Unit of Colorectal and Digestive Surgery, DIGEST Department, Beaujon University Hospital, AP-HP, University of Paris Cité, Clichy, France
| | | | - Imtiaz Wani
- Department of Surgery, Government Gousia Hospital, DHS, Srinagar, India
| | - Boris Sakakushev
- General Surgery Department, Medical University, University Hospital St George, Plovdiv, Bulgaria
| | - Miklosh Bala
- Hadassah Medical Center and Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel
| | - Luigi Bonavina
- Division of General Surgery, IRCCS Policlinico San Donato, University of Milan, Milan, Italy
| | - Joseph M Galante
- Division of Trauma and Acute Care Surgery, Department of Surgery, University of California Davis, Sacramento, CA, USA
| | - Vishal G Shelat
- Department of General Surgery, Tan Tock Seng Hospital, Novena, Singapore
| | - Lorenzo Cobianchi
- Unit of General Surgery I, IRCCS San Matteo Hospital of Pavia, University of Pavia, Pavia, Italy
- Collegium Medicum, University of Social Sciences, Łodz, Poland
| | - Francesca Dal Mas
- Department of Management, Ca' Foscari University of Venice, Venice, Italy
- Collegium Medicum, University of Social Sciences, Łodz, Poland
| | - Manos Pikoulis
- Department of Surgical Science, Unit of Emergency Surgery, University of Cagliari, Cagliari, Italy
| | | | - Raul Coimbra
- Riverside University Health System Medical Center, Riverside, CA, USA
| | - Jugdeep Dhesi
- Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Melissa Red Hoffman
- Department of Surgery, University of North Carolina, Surgical Palliative Care Society, Asheville, NC, USA
| | - Philip F Stahel
- Department of Surgery, Brody School of Medicine, East Carolina University, Greenville, NC, USA
| | - Ronald V Maier
- Harborview Medical Center, University of Washington, Seattle, WA, USA
| | - Andrey Litvin
- Department of Surgical Diseases No. 3, Gomel State Medical University, University Clinic, Gomel, Belarus
| | - Rifat Latifi
- University of Arizona, Tucson, AZ, USA
- Abrazo Health West Campus, Goodyear, Tucson, AZ, USA
| | - Walter L Biffl
- Division of Trauma/Acute Care Surgery, Scripps Clinic Medical Group, La Jolla, CA, USA
| | - Fausto Catena
- Department of General and Emergency Surgery, Bufalini Hospital-Level 1 Trauma Center, AUSL Romagna, Cesena, Italy
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Kumano O, Suzuki S, Yamazaki M, An Y, Yasaka M, Ieko M. Age-related variation in coagulation factors in non-valvular atrial fibrillation patients receiving direct oral anticoagulants. Int J Hematol 2024; 119:407-415. [PMID: 38334914 DOI: 10.1007/s12185-024-03712-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Revised: 01/07/2024] [Accepted: 01/11/2024] [Indexed: 02/10/2024]
Abstract
Age is a significant risk factor for ischemic stroke. However, the influence of aging on coagulation parameters in non-valvular atrial fibrillation (NVAF) patients treated with direct oral anticoagulants (DOACs) remains unclear. A total of 775 samples were collected from 224 NVAF patients receiving apixaban, edoxaban or rivaroxaban. The samples were categorized into three age groups: (i) ≤ 64 years, (ii) 65-74 years, and (iii) ≥ 75 years (apixaban: N = 48, 108, 119; edoxaban: N = 63, 68, 126; rivaroxaban: N = 115, 90, 38, respectively). Coagulation parameters including fibrinogen (Fbg), factor II, factor V, factor VII, factor X, and D-dimer, were compared between the three age groups for each drug. The slopes in the correlation between drug concentrations and modified diluted prothrombin time (mdPT) were also assessed. Fbg and factor V increased with age, while factor II and factor X decreased. Factor VII and D-dimer showed no significant differences across age categories. The slope in response to drug concentrations was similar between the age groups. In NVAF patients treated with apixaban, edoxaban and rivaroxaban, some coagulation parameters exhibited age-related variation. However, the response of mdPT to drug concentration was consistent across age categories.
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Affiliation(s)
- Osamu Kumano
- Sysmex Corporation, Kobe, Japan
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Takamatsu, Japan
| | - Shinya Suzuki
- Department of Cardiovascular Medicine, The Cardiovascular Institute, Tokyo, Japan
| | - Masako Yamazaki
- Department of Neurology, Tokyo Women's Medical University, Tokyo, Japan
- Department of Artificial Intelligence Medicine, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Yoshimori An
- Department of Cardiology, National Hospital Organization Kyoto Medical Center, Kyoto, Japan
- Department of Cardiology, Saiseikai Noe Hospital, Osaka, Japan
| | - Masahiro Yasaka
- Department of Cerebrovascular Medicine and Neurology, Clinical Research Institute, National Hospital Organization Kyushu Medical Center, Fukuoka, Japan
- Fukuoka Neurosurgical Hospital, Fukuoka, Japan
| | - Masahiro Ieko
- Department of Internal Medicine, School of Dentistry, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Japan.
- Department of Nursing, Sapporo University of Health Sciences, 1-15, Nakanuma Nishi-4-2, Higashi-ku, Sapporo, Hokkaido, 007-0894, Japan.
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Exner T, Dangol M, Favaloro EJ. Simplified Method for Removing Direct Oral Anticoagulant Interference in Mechanical Coagulation Test Systems-A Proof of Concept. J Clin Med 2024; 13:1042. [PMID: 38398355 PMCID: PMC10889288 DOI: 10.3390/jcm13041042] [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: 12/26/2023] [Revised: 02/04/2024] [Accepted: 02/07/2024] [Indexed: 02/25/2024] Open
Abstract
BACKGROUND Direct oral anticoagulants (DOACs) cause unwanted interference in various hemostasis assays, including lupus anticoagulant (LA) testing, where false positive and false negative identification may occur. DOAC Stop (DS) is an activated charcoal (AC) product used to specifically and effectively adsorb DOACs from test plasma. This process normally requires plasma treatment, centrifugation and plasma separation prior to tests, but inexperienced operators may also inadvertently transfer residual AC particles, thereby potentially adversely affecting clot detection. METHODS We hypothesized that residual DS might not be problematic for mechanical clot detection. We therefore investigated the potential impact of DS and a new DS liquid (DS-L) product on clotting tests using a mechanical clot detection system. Varying concentrations of DS were added to normal and abnormal plasmas with and without DOAC presence. Clotting tests including PT, APTT and dRVVT were performed directly in the analyzer without plasma/DS centrifugation. RESULTS DS up to double the recommended treatment level had only minor effects on all test results, despite completely obscuring visibility in the plasma/reagent mix. This confirms that the centrifugation step may be able to be omitted when using mechanical detection systems. CONCLUSIONS Should DS carryover into treated plasmas occur, this should not cause issues with testing performed on mechanical clot-sensing devices. Moreover, we hypothesize that DS can be used directly in these systems, without the need for centrifugation, thereby simplifying its many potential applications.
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Affiliation(s)
- Thomas Exner
- Haematex Research Pty Ltd., Sydney, NSW 2077, Australia; (T.E.); (M.D.)
| | - Manita Dangol
- Haematex Research Pty Ltd., Sydney, NSW 2077, Australia; (T.E.); (M.D.)
| | - Emmanuel J. Favaloro
- Haematology Department, Institute of Clinical Pathology and Medical Research (ICPMR), Sydney Centres for Thrombosis and Haemostasis, Westmead Hospital, Sydney, NSW 2145, Australia
- School of Dentistry and Medical Sciences, Faculty of Science and Health, Charles Sturt University, Wagga, NSW 2650, Australia
- School of Medical Sciences, Faculty of Medicine and Health, University of Sydney, Westmead Hospital, Westmead, NSW 2145, Australia
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5
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Barnes JL, Pabian IE, Bonjour AK, Mosbacher KA, Mortrude GC, Beasley KA. Cefazolin-Associated INR Elevation: A Case Report. J Pharm Pract 2024; 37:234-238. [PMID: 36206055 DOI: 10.1177/08971900221132680] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Purpose: To describe a case of significantly elevated international normalized ratio (INR) in a patient on apixaban receiving treatment with intravenous cefazolin in the setting of coronavirus disease 2019 (COVID-19) infection and malnutrition. Summary: A 74-year-old male patient on apixaban receiving cefazolin for osteomyelitis in the setting of COVID-19 and poor nutritional intake presented with internal jugular tunneled catheter site bleeding and an INR of greater than 22.5. Laboratory abnormalities and bleeding concerns were successfully managed with vitamin K and changing antimicrobial therapy from cefazolin to daptomycin. Follow-up labs one week later demonstrated a sustained improvement in coagulopathy. Conclusion: INR prolongation believed to be secondary to cefazolin can be effectively managed with administration of vitamin K and conversion of antimicrobial therapy to an alternative agent.
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Affiliation(s)
- Jeremiah L Barnes
- Clement J. Zablocki Veterans Affairs Medical Center, Milwaukee, Wisconsin, USA
| | - Inez E Pabian
- Clement J. Zablocki Veterans Affairs Medical Center, Milwaukee, Wisconsin, USA
| | - Abigail K Bonjour
- Clement J. Zablocki Veterans Affairs Medical Center, Milwaukee, Wisconsin, USA
| | - Karolyn A Mosbacher
- Clement J. Zablocki Veterans Affairs Medical Center, Milwaukee, Wisconsin, USA
| | - Grace C Mortrude
- Clement J. Zablocki Veterans Affairs Medical Center, Milwaukee, Wisconsin, USA
| | - Kyle A Beasley
- Clement J. Zablocki Veterans Affairs Medical Center, Milwaukee, Wisconsin, USA
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Buckley GT, Murphy B, Fleming N, Crowley MP, Harte JV. Removing direct oral factor Xa inhibitor interferences from routine and specialised coagulation assays using a raw activated charcoal product. Clin Chim Acta 2023; 550:117565. [PMID: 37769932 DOI: 10.1016/j.cca.2023.117565] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 09/19/2023] [Accepted: 09/21/2023] [Indexed: 10/03/2023]
Abstract
BACKGROUND Direct oral anticoagulants (DOACs) are increasingly prescribed for the prevention and treatment of thrombosis. However, DOACs are associated with extensive interference in coagulation assays. Herein, we evaluate raw activated charcoal (AC) as an adsorbent material, to minimise DOAC-associated interferences in routine and specialised coagulation parameters on CS-series analysers (Sysmex, Kobe, Japan). METHODS Commercial human-derived non-anticoagulated plasma materials, with or without increasing concentrations of anticoagulant, were assayed for routine and specialised coagulation parameters before and after treatment with AC. RESULTS Treatment of non-anticoagulated plasma with raw AC had minimal impact on routine and specialised coagulation parameters available on the CS-series; however, clinically relevant prolongations of certain activated partial thromboplastin time (APTT)-based assays were observed after treatment. Furthermore, in apixaban- and rivaroxaban-containing plasma material, AC efficiently adsorbed therapeutic and supratherapeutic DOAC concentrations; and, treatment with raw AC resolved DOAC-associated interferences on all affected routine and specialised coagulation parameters. CONCLUSIONS Overall, raw AC efficiently adsorbed apixaban and rivaroxaban from human-derived plasma, without significantly affecting the majority of underlying routine and specialised coagulation parameters available on CS-series analysers.
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Affiliation(s)
- Gavin T Buckley
- Department of Haematology, Cork University Hospital, Wilton, Cork, Ireland; EOLAS Research Group, Cork University Hospital, Wilton, Cork, Ireland
| | - Ber Murphy
- Department of Haematology, Cork University Hospital, Wilton, Cork, Ireland
| | - Niamh Fleming
- Department of Haematology, Cork University Hospital, Wilton, Cork, Ireland
| | - Maeve P Crowley
- Department of Haematology, Cork University Hospital, Wilton, Cork, Ireland; EOLAS Research Group, Cork University Hospital, Wilton, Cork, Ireland; Irish Network for Venous Thromboembolism Research (INViTE), Ireland
| | - James V Harte
- Department of Haematology, Cork University Hospital, Wilton, Cork, Ireland; EOLAS Research Group, Cork University Hospital, Wilton, Cork, Ireland.
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Gackowski M, Madriwala B, Studzińska R, Koba M. Novel Isosteviol-Based FXa Inhibitors: Molecular Modeling, In Silico Design and Docking Simulation. Molecules 2023; 28:4977. [PMID: 37446638 DOI: 10.3390/molecules28134977] [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: 05/12/2023] [Revised: 06/20/2023] [Accepted: 06/23/2023] [Indexed: 07/15/2023] Open
Abstract
Direct oral anticoagulants are an important and relatively new class of synthetic anticoagulant drugs commonly used for the pharmacotherapy of thromboembolic disorders. However, they still have some limitations and serious side effects, which continuously encourage medicinal chemists to search for new active compounds acting as human-activated coagulation factor X (FXa) inhibitors. Isosteviol is a nontoxic hydrolysis product of naturally occurring stevioside and possesses a wide range of therapeutic properties, including anticoagulant activity. The present contribution describes the in silico design of novel oxime ether isosteviol derivatives as well as a molecular modeling approach based on QSAR analysis and a docking simulation for searching for novel isosteviol-based compounds as potential FXa inhibitors. The elaborated ANN model, encompassing topological and geometrical information, exhibited a significant correlation with FXa-inhibitory activity. Moreover, the docking simulation indicated six of the most promising isosteviol-like compounds for further investigation. Analysis showed that the most promising derivatives contain heterocyclic, aromatic, five-membered moieties, with substituents containing chlorine or fluorine atoms. It is anticipated that the findings reported in the present work may provide useful information for designing effective FXa inhibitors as anticoagulant agents.
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Affiliation(s)
- Marcin Gackowski
- Department of Toxicology and Bromatology, Faculty of Pharmacy, L. Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun, A. Jurasza 2 Street, 85089 Bydgoszcz, Poland
| | - Burhanuddin Madriwala
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Nitte College of Pharmaceutical Sciences, Yelahanka, Bengaluru 560064, Karnataka, India
| | - Renata Studzińska
- Department of Organic Chemistry, Faculty of Pharmacy, L. Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun, A. Jurasza 2 Street, 85089 Bydgoszcz, Poland
| | - Marcin Koba
- Department of Toxicology and Bromatology, Faculty of Pharmacy, L. Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun, A. Jurasza 2 Street, 85089 Bydgoszcz, Poland
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Douketis JD, Spyropoulos AC. Perioperative Management of Anticoagulant and Antiplatelet Therapy. NEJM EVIDENCE 2023; 2:EVIDra2200322. [PMID: 38320132 DOI: 10.1056/evidra2200322] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2024]
Abstract
Anticoagulant and Antiplatelet Drug ManagementManagement of patients on an anticoagulant or antiplatelet drug who require surgery or an invasive procedure is a common clinical problem. Douketis and Spyropoulos provide an evidence-based but practical approach to managing anticoagulants and antiplatelet drugs in the perioperative setting.
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Affiliation(s)
- James D Douketis
- Department of Medicine, St. Joseph's Healthcare Hamilton and McMaster University, Hamilton, ON, Canada
| | - Alex C Spyropoulos
- Department of Medicine, Anticoagulation and Clinical Thrombosis Service, Northwell Health at Lenox Hill Hospital, New York
- Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Hempstead, New York
- Institute of Health Systems Science at The Feinstein Institutes for Medical Research, Manhasset, New York
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9
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Guy S, Shepherd MF, Bowyer AE, Kitchen S. How to assess parallelism in factor assays: coefficient of variation of results with different dilutions or slope ratio? Int J Lab Hematol 2023; 45:229-240. [PMID: 36484119 DOI: 10.1111/ijlh.14002] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Accepted: 11/21/2022] [Indexed: 12/14/2022]
Abstract
INTRODUCTION Non-parallelism in factor assays can lead to incorrect factor activities. Parallelism can be assessed by calculating the coefficient of variation (CV) of results obtained on 3 dilutions of the same sample. Some authors have proposed that if there is <15% then the average activity is reportable. Some analysers use a slope ratio (SR) to calculate parallelism, with an acceptance range of approximately 0.9-1.1. METHODS We evaluated CV and SR in one stage FII-FXII assays on Sysmex CS5100i using Innovin or Actin FS. Frozen normal and pathological plasmas, plasmas containing Direct Oral Anticoagulants, Direct Thrombin Inhibitors or Lupus Anticoagulant were analysed to assess possible non-parallelism. RESULTS In plasmas with factor levels >25 IU/dl (plus no interfering substances) all CVs were < 15%. One sample (low factor activities 10-15 IU/dl), had CVs > 15% in FII, FVII and FXII assays only. SR outside of 0.9-1.1 were seen in FII and FXII assays at different levels of clotting factor including some within the normal range. Non-parallelism was detected more frequently with SR than CV for those with interfering substances. CONCLUSIONS SR outside of 0.9-1.1 were seen in different levels of clotting factors, including samples which did not contain interfering substances. The target of 15% CV was a better discriminator than a SR for acceptance. When factor levels were reduced to around 10-15 IU/dl, a target 20 %CV was more appropriate than 15%. It might be appropriate for laboratories to assess locally whether their acceptance criteria need to be wider at low levels of clotting factors.
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Affiliation(s)
- Susan Guy
- Sheffield Haemophilia and Thrombosis Centre, Royal Hallamshire Hospital, Sheffield, UK
| | - M Fiona Shepherd
- Sheffield Haemophilia and Thrombosis Centre, Royal Hallamshire Hospital, Sheffield, UK
| | - Annette E Bowyer
- Sheffield Haemophilia and Thrombosis Centre, Royal Hallamshire Hospital, Sheffield, UK
| | - Steve Kitchen
- Sheffield Haemophilia and Thrombosis Centre, Royal Hallamshire Hospital, Sheffield, UK
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10
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Apixaban and Rivaroxaban Anti-Xa Concentration Utilization in Clinical Practice. J Cardiovasc Pharmacol 2023; 81:165-170. [PMID: 36607730 DOI: 10.1097/fjc.0000000000001383] [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] [Received: 06/15/2022] [Accepted: 10/15/2022] [Indexed: 01/07/2023]
Abstract
ABSTRACT Drug-specific anti-Xa concentrations can be used to assess the presence of drug effects; however, there is inadequate guidance for clinicians on the interpretation and clinical application of these results. The purpose of this study is to review patients' first apixaban and rivaroxaban anti-Xa concentrations to identify indications for monitoring and common therapeutic interventions made based on the results. In addition, we compared bleeding and thrombotic outcomes between the obesity group body mass index ≥40 kg/m 2 and the standard group body mass index 25-39.9 kg/m 2 . A retrospective analysis was conducted at a large academic medical center from January 1, 2020, to December 31, 2020. Primary outcomes were indications for anti-Xa concentrations and interventions on results. A total of 180 patients were included in the analysis, with 119 patients (66%) in the apixaban group and 61 patients (34%) in the rivaroxaban group. The most common indications for anti-Xa concentrations were extreme body weight (23%) and concern for bleeding (22%). About half of the anti-Xa concentrations resulted in therapy changes including holding for procedure, switching to heparin or enoxaparin, holding for an elevated anti-Xa concentration or concern for bleeding, adjusting direct-acting oral anticoagulant dose, or switching to an alternative oral anticoagulant. There were no differences in bleeding complications (5% [2] vs. 16% [14], P = 0.11) or thrombotic complications (8% [3] vs. 9% [8], P = 0.85) between the obesity group and the standard group. Despite the lack of validation of therapeutic ranges for anti-Xa concentrations, this study showed clinical situations where anti-Xa concentration monitoring can be of value.
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11
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Gosselin RC. Preanalytical Variables in Hemostasis Testing. Methods Mol Biol 2023; 2663:39-50. [PMID: 37204702 DOI: 10.1007/978-1-0716-3175-1_2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Hemostasis testing performed in clinical laboratories are critical for assessing hemorrhagic and thrombotic disorders. The assays performed can be used to provide the information required for diagnosis, risk assessment, efficacy of therapy, and therapeutic monitoring. As such, hemostasis tests should be performed to the highest level of quality, including the standardization, implementation, and monitoring of all phases of the testing, which include the preanalytical, analytical, and post-analytical phases. It is well established that the preanalytical phase is the most critical component of the testing process, being the hands-on activities, including patient preparation for blood collection, as well as the actual blood collection, including sample identification and the post-collection handling to include sample transportation, processing, and storage of samples when testing is not performed immediately. The purpose of this article is to provide an update to the previous edition of coagulation testing-related preanalytical variables (PAV) and, when properly addressed and performed, can reduce the most common causes of errors in the hemostasis laboratory.
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Affiliation(s)
- Robert C Gosselin
- Hemostasis & Thrombosis Center, University of California, Davis Health System, Sacramento, CA, USA
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12
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Mehrotra S, Hoppensteadt D, Jeske W, Siddiqui F, Iqbal O, Tafur A, Lewis B, Jaradeh M, Kantarcioglu B, Fareed J. Differential Neutralization of Apixaban, Betrixaban, Edoxaban, and Rivaroxaban by Andexanet Alfa as Measured by Whole Blood Thromboelastographic Analysis. Clin Appl Thromb Hemost 2022; 28:10760296221138297. [PMID: 36476125 PMCID: PMC9742582 DOI: 10.1177/10760296221138297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
INTRODUCTION The available oral anti-Xa agents are routinely used for the management of thrombotic disorders. A molecularly modified recombinant coagulation FXa, also known as Andexanet Alfa (AA), that has been developed as an antidote to neutralize the bleeding effects of oral FXa inhibitors, such as Apixaban and Rivaroxaban. MATERIALS AND METHODS This study utilized thromboelastography (TEG 5000 Hemostasis System), to investigate the neutralizing effects of AA at different concentrations of oral FXa inhibitors measuring such parameters as R-Time, K-Time, Angle, and Max Amplitude (MA). Apixaban, Betrixaban, Edoxaban, and Rivaroxaban were obtained commercially in powdered form. Each of these drugs was supplemented with freshly drawn whole citrated blood at a concentration of 1 μg/mL. And subsequently mixed with AA at 50 or 100 μg/mL. RESULTS At a concentration of 1 μg/mL, all FXa inhibitors produced variable anticoagulant effects in the order of Edoxaban > Betrixaban > Rivaroxaban > Apixaban. AA at 100 μg/mL produced a complete neutralization of these inhibitors whereas at 50 μg/mL relatively weaker neutralization as measured by various parameters. CONCLUSION These results suggest that regardless of the variable anticoagulant effects exhibited by the FXa Inhibitors, AA at FC = 100 μg/mL fully neutralized these agents as measured by the TEG parameters. AA was shown to be more effective in neutralizing Betrixaban and least effective in Apixaban. The neutralization of various FXa inhibitors was dose and donor-dependent warranting dosage adjustment for optimal outcomes.
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Affiliation(s)
- Siddharth Mehrotra
- Department of Molecular Pharmacology & Neuroscience, Cardiovascular Research Institute, Loyola University Chicago, Health Sciences Division, Maywood, IL, USA
| | - Debra Hoppensteadt
- Department of Molecular Pharmacology & Neuroscience, Cardiovascular Research Institute, Loyola University Chicago, Health Sciences Division, Maywood, IL, USA,Department of Pathology and Laboratory Medicine, Cardiovascular Research Institute, Loyola University Chicago, Health Sciences Division, Maywood, IL, USA
| | - Walter Jeske
- Department of Molecular Pharmacology & Neuroscience, Cardiovascular Research Institute, Loyola University Chicago, Health Sciences Division, Maywood, IL, USA,Department of Pathology and Laboratory Medicine, Cardiovascular Research Institute, Loyola University Chicago, Health Sciences Division, Maywood, IL, USA
| | - Fakiha Siddiqui
- Department of Pathology and Laboratory Medicine, Cardiovascular Research Institute, Loyola University Chicago, Health Sciences Division, Maywood, IL, USA,Program in Health Sciences, UCAM - Universidad Católica San Antonio de Murcia, Murcia, Spain
| | - Omer Iqbal
- Department of Molecular Pharmacology & Neuroscience, Cardiovascular Research Institute, Loyola University Chicago, Health Sciences Division, Maywood, IL, USA
| | - Alfonso Tafur
- Department of Vascular Medicine, Northshore Cardiovascular Institute, NorthShore University Health Systems, Skokie, IL, USA,Department of Internal Medicine, Division of Cardiology, Loyola University Medical Center, Maywood, IL, USA
| | - Bruce Lewis
- Department of Internal Medicine, Division of Cardiology, Loyola University Medical Center, Maywood, IL, USA
| | - Mark Jaradeh
- Department of Molecular Pharmacology & Neuroscience, Cardiovascular Research Institute, Loyola University Chicago, Health Sciences Division, Maywood, IL, USA
| | - Bulent Kantarcioglu
- Department of Molecular Pharmacology & Neuroscience, Cardiovascular Research Institute, Loyola University Chicago, Health Sciences Division, Maywood, IL, USA
| | - Jawed Fareed
- Department of Molecular Pharmacology & Neuroscience, Cardiovascular Research Institute, Loyola University Chicago, Health Sciences Division, Maywood, IL, USA,Department of Pathology and Laboratory Medicine, Cardiovascular Research Institute, Loyola University Chicago, Health Sciences Division, Maywood, IL, USA,Jawed Fareed, Department of Molecular Pharmacology & Neuroscience, Loyola University Health System, 2160 S First Avenue Bldg 115, Rm 432 Maywood, IL 60153, USA.
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13
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Sahli SD, Castellucci C, Roche TR, Rössler J, Spahn DR, Kaserer A. The impact of direct oral anticoagulants on viscoelastic testing - A systematic review. Front Cardiovasc Med 2022; 9:991675. [PMID: 36419490 PMCID: PMC9676657 DOI: 10.3389/fcvm.2022.991675] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 10/03/2022] [Indexed: 09/12/2023] Open
Abstract
BACKGROUND In case of bleeding patients and in acute care, the assessment of residual direct oral anticoagulant (DOAC) activity is essential for evaluating the potential impact on hemostasis, especially when a timely decision on urgent surgery or intervention is required. Viscoelastic tests are crucial in a modern goal-directed coagulation management to assess patients' coagulation status. However, the role of viscoelastic test to detect and quantify residual DOAC plasma levels is controversially discussed. The aim of this review was to systematically summarize the evidence of viscoelastic tests for the assessment of residual DOAC activity. METHOD PubMed, Embase, Scopus, and the Cochrane Library were searched for original articles investigating the effect of rivaroxaban, apixaban, edoxaban, or dabigatran plasma levels on different viscoelastic tests of the adult population from database inception to December 31, 2021. RESULTS We included 53 studies from which 31 assessed rivaroxaban, 22 apixaban, six edoxaban, and 29 dabigatran. The performance of viscoelastic tests varied across DOACs and assays. DOAC specific assays are more sensitive than unspecific assays. The plasma concentration of rivaroxaban and dabigatran correlates strongly with the ROTEM EXTEM, ClotPro RVV-test or ECA-test clotting time (CT) and TEG 6s anti-factor Xa (AFXa) or direct thrombin inhibitor (DTI) channel reaction time (R). Results of clotting time (CT) and reaction time (R) within the normal range do not reliable exclude relevant residual DOAC plasma levels limiting the clinical utility of viscoelastic assays in this context. CONCLUSION Viscoelastic test assays can provide fast and essential point-of-care information regarding DOAC activity, especially DOAC specific assays. The identification and quantification of residual DOAC plasma concentration with DOAC unspecific viscoelastic assays are not sensitive enough, compared to recommended anti-Xa activity laboratory measurements. SYSTEMATIC REVIEW REGISTRATION [https://www.crd.york.ac.uk/prospero/display_record.php?RecordID=320629], identifier [CRD42022320629].
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Affiliation(s)
- Sebastian D. Sahli
- Institute of Anesthesiology, University and University Hospital Zurich, Zurich, Switzerland
| | - Clara Castellucci
- Institute of Anesthesiology, University and University Hospital Zurich, Zurich, Switzerland
| | - Tadzio R. Roche
- Institute of Anesthesiology, University and University Hospital Zurich, Zurich, Switzerland
| | - Julian Rössler
- Department of Outcomes Research, Anesthesiology Institute, Cleveland Clinic, Cleveland, OH, United States
| | - Donat R. Spahn
- Institute of Anesthesiology, University and University Hospital Zurich, Zurich, Switzerland
| | - Alexander Kaserer
- Institute of Anesthesiology, University and University Hospital Zurich, Zurich, Switzerland
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14
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Gosselin RC, Favaloro EJ, Douxfils J. The myths behind DOAC measurement: Analyses of prescribing information from different regulatory bodies and a call for harmonization. J Thromb Haemost 2022; 20:2494-2506. [PMID: 36111493 PMCID: PMC9828176 DOI: 10.1111/jth.15884] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 09/15/2022] [Accepted: 09/15/2022] [Indexed: 01/12/2023]
Abstract
For more than a decade, US laboratories have failed to implement solutions to help their clinicians in managing complex situations or patients on direct oral anticoagulants (DOACs). The problem may find different origins, among which is the position of the Food and Drug Administration, which categorized these drugs as monitoring- and measurement-free, whereas other regulatory bodies like the European Medicines Agency or the Therapeutic Goods Administration in Australia were more conservative on the principle that the absence of proof (of monitoring/measurement benefits) is not proof of an absence (of monitoring/measurement needs). Pivotal clinical studies that led to the approval of DOACs were presented as devoid of such testing, although some companies considered monitoring as a solution to improve their benefit/risk ratio. In this JTH In Clinics issue, we report more than a decade of development that has permitted the activation of smart laboratory solutions to qualify or quantify DOACs and discuss myths and misconceptions around technical and regulatory requirements that support the current reluctance of implementing these technologies in most US laboratories. Use of DOACs is ever expanding, with DOAC prescriptions now exceeding those of other anticoagulants, including vitamin K antagonists, in some geographies. As this use increases, the likely need to measure DOAC exposure will also increase. Measurement of DOACs does not represent any technical difficulty. That these laboratory tests are not available in some locations suggests disparities in patient care, and we suggest it is time to address such inequalities.
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Affiliation(s)
- Robert C. Gosselin
- Davis Health System, Hemostasis and Thrombosis CenterUniversity of CaliforniaSacramentoCaliforniaUSA
| | - Emmanuel J. Favaloro
- Department of Haematology, Institute of Clinical Pathology and Medical Research (ICPMR), Sydney Centres for Thrombosis and Haemostasis, NSW Health PathologyWestmead HospitalWestmeadNew South WalesAustralia
- School of Medical Sciences, Faculty of Medicine and HealthUniversity of SydneyWestmeadNew South WalesAustralia
- School of Dentistry and Medical Sciences, Faculty of Science and HealthCharles Sturt UniversityWagga WaggaNew South WalesAustralia
| | - Jonathan Douxfils
- University of Namur, Faculty of Medicine, Department of Pharmacy,Namur Research Institute for Life Sciences, Namur Thrombosis and Hemostasis CenterNamurBelgium
- QUALIblood s.a.Research and Development DepartmentNamurBelgium
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15
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Douketis JD, Spyropoulos AC, Murad MH, Arcelus JI, Dager WE, Dunn AS, Fargo RA, Levy JH, Samama CM, Shah SH, Sherwood MW, Tafur AJ, Tang LV, Moores LK. Perioperative Management of Antithrombotic Therapy: An American College of Chest Physicians Clinical Practice Guideline. Chest 2022; 162:e207-e243. [PMID: 35964704 DOI: 10.1016/j.chest.2022.07.025] [Citation(s) in RCA: 78] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/10/2022] [Accepted: 07/11/2022] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND The American College of Chest Physicians Clinical Practice Guideline on the Perioperative Management of Antithrombotic Therapy addresses 43 Patients-Interventions-Comparators-Outcomes (PICO) questions related to the perioperative management of patients who are receiving long-term oral anticoagulant or antiplatelet therapy and require an elective surgery/procedure. This guideline is separated into four broad categories, encompassing the management of patients who are receiving: (1) a vitamin K antagonist (VKA), mainly warfarin; (2) if receiving a VKA, the use of perioperative heparin bridging, typically with a low-molecular-weight heparin; (3) a direct oral anticoagulant (DOAC); and (4) an antiplatelet drug. METHODS Strong or conditional practice recommendations are generated based on high, moderate, low, and very low certainty of evidence using the Grading of Recommendations, Assessment, Development, and Evaluation (GRADE) methodology for clinical practice guidelines. RESULTS A multidisciplinary panel generated 44 guideline recommendations for the perioperative management of VKAs, heparin bridging, DOACs, and antiplatelet drugs, of which two are strong recommendations: (1) against the use of heparin bridging in patients with atrial fibrillation; and (2) continuation of VKA therapy in patients having a pacemaker or internal cardiac defibrillator implantation. There are separate recommendations on the perioperative management of patients who are undergoing minor procedures, comprising dental, dermatologic, ophthalmologic, pacemaker/internal cardiac defibrillator implantation, and GI (endoscopic) procedures. CONCLUSIONS Substantial new evidence has emerged since the 2012 iteration of these guidelines, especially to inform best practices for the perioperative management of patients who are receiving a VKA and may require heparin bridging, for the perioperative management of patients who are receiving a DOAC, and for patients who are receiving one or more antiplatelet drugs. Despite this new knowledge, uncertainty remains as to best practices for the majority of perioperative management questions.
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Affiliation(s)
- James D Douketis
- Department of Medicine, St. Joseph's Healthcare Hamilton and McMaster University, Hamilton, ON, Canada.
| | - Alex C Spyropoulos
- Department of Medicine, Northwell Health at Lenox Hill Hospital, New York, NY; Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Hempstead, NY; Institute of Health Systems Science at The Feinstein Institutes for Medical Research, Manhasset, NY
| | - M Hassan Murad
- Mayo Clinic Evidence-Based Practice Center, Rochester, MN
| | - Juan I Arcelus
- Department of Surgery, Facultad de Medicina, University of Granada, Granada, Spain
| | - William E Dager
- Department of Pharmacy, University of California-Davis, Sacramento, CA
| | - Andrew S Dunn
- Division of Hospital Medicine, Department of Medicine, Mt. Sinai Health System, New York, NY
| | - Ramiz A Fargo
- Department of Internal Medicine, Loma Linda University Medical Center, Loma Linda, CA; Department of Internal Medicine, Riverside University Health System Medical Center, Moreno Valley, CA
| | - Jerrold H Levy
- Department of Anesthesiology, Critical Care, and Surgery (Cardiothoracic), Duke University School of Medicine, Durham, NC
| | - C Marc Samama
- Department of Anaesthesia, Intensive Care and Perioperative Medicine, GHU AP-HP, Centre-Université Paris-Cité-Cochin Hospital, Paris, France
| | - Sahrish H Shah
- Mayo Clinic Evidence-Based Practice Center, Rochester, MN
| | | | - Alfonso J Tafur
- Department of Medicine, Cardiovascular, NorthShore University HealthSystem, Evanston, IL
| | - Liang V Tang
- Institute of Hematology, Union Hospital, Tongji Medical College, Huazhong, University of Science and Technology, Wuhan, China
| | - Lisa K Moores
- F. Edward Hébert School of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD
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16
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Evrard J, Siriez R, Bouvy C, Favresse J, Yildiz H, Hainaut P, Mullier F, Dogné J, Douxfils J. Comparison of analytical performances between clot waveform analysis and
FibWave
in edoxaban‐treated patients and healthy controls. Res Pract Thromb Haemost 2022; 6:e12804. [PMID: 36349263 PMCID: PMC9634266 DOI: 10.1002/rth2.12804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 08/10/2022] [Accepted: 08/18/2022] [Indexed: 11/06/2022] Open
Abstract
Introduction The activated partial thromboplastin time (aPTT) and the prothrombin time (PT) are widely available coagulation parameters which are however poor predictors of the anticoagulant effect of direct oral anticoagulants (DOACs). Some coagulometers use the clot waveform analysis (CWA) to assess the clotting time but mainly based on a unique parameter. The improvement of these methodologies and the evaluation of the other waveform parameters may increase the sensitivity to DOACs. Objectives To assess the performance of an improved clot waveform an method (i.e. FibWave) to detect the impact of edoxaban on the coagulation and the fibrinolytic systems. Methods Seventy‐one samples from patients treated with edoxaban collected at minimum concentration (CTROUGH) and/or maximum concentration (CMAX), and 45 control samples were included. The aPTT‐ and PT‐based CWA as well as the FibIn, FibEx, and FibLysis methodologies of the FibWave were implemented and performed on an ACL‐TOP 700. Results PT and FibEx clotting time were strongly correlated to edoxaban concentration (Pearson r = 0.80 and 0.89, respectively). The FibEx clotting time allowed a better discrimination for samples with 30 and 50 ng/ml of edoxaban compared to PT (cutoffs of 96.5 and 114.2 s for the FibEx versus a unique cutoff of 13.1 s for the PT). The fibrinolytic process was impaired in the presence of edoxaban in a dose‐dependent manner. Conclusion FibEx is more sensitive than aPTT‐ and PT‐based CWA for the detection of the clinically relevant anticoagulant level of edoxaban.
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Affiliation(s)
- Jonathan Evrard
- Department of PharmacyUniversité de Namur, Namur Thrombosis and Hemostasis Center (NTHC), Namur Research Institute for Life Sciences (NARILIS)NamurBelgium
| | - Romain Siriez
- Department of PharmacyUniversité de Namur, Namur Thrombosis and Hemostasis Center (NTHC), Namur Research Institute for Life Sciences (NARILIS)NamurBelgium
| | | | - Julien Favresse
- Department of PharmacyUniversité de Namur, Namur Thrombosis and Hemostasis Center (NTHC), Namur Research Institute for Life Sciences (NARILIS)NamurBelgium
- Department of Laboratory MedicineClinique Saint‐Luc BougeNamurBelgium
| | - Halil Yildiz
- Department of Internal Medicine and Infectious Diseases, Cliniques Universitaires Saint‐LucUniversité Catholique de LouvainBrusselsBelgium
| | - Philippe Hainaut
- Department of Internal Medicine and Infectious Diseases, Cliniques Universitaires Saint‐LucUniversité Catholique de LouvainBrusselsBelgium
| | - François Mullier
- Hematology LaboratoryUniversité Catholique de Louvain, CHU UCL Namur, Namur Thrombosis and Hemostasis Center (NTHC), Namur Research Institute for Life Sciences (NARILIS)YvoirBelgium
| | - Jean‐Michel Dogné
- Department of PharmacyUniversité de Namur, Namur Thrombosis and Hemostasis Center (NTHC), Namur Research Institute for Life Sciences (NARILIS)NamurBelgium
| | - Jonathan Douxfils
- Department of PharmacyUniversité de Namur, Namur Thrombosis and Hemostasis Center (NTHC), Namur Research Institute for Life Sciences (NARILIS)NamurBelgium
- Qualiblood s.a.NamurBelgium
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Do Apixaban Plasma Levels Relate to Bleeding? The Clinical Outcomes and Predictive Factors for Bleeding in Patients with Non-Valvular Atrial Fibrillation. Biomedicines 2022; 10:biomedicines10082001. [PMID: 36009548 PMCID: PMC9406092 DOI: 10.3390/biomedicines10082001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 08/11/2022] [Accepted: 08/14/2022] [Indexed: 12/28/2022] Open
Abstract
Apixaban can significantly prevent stroke events in patients with non-valvular atrial fibrillation (NVAF), as can be observed from the large, randomized, controlled trial conducted in the present study. However, the real-world evidence of bleeding events related to the apixaban plasma levels in Asian populations is limited. This study aimed to investigate the apixaban plasma levels and clinical outcomes among NVAF patients receiving apixaban, including determining the risk factors associated with bleeding during routine care. Seventy-one patients were included in the study. The median values were 112.79 (5–95th percentiles: 68.69–207.8) μg/L and 185.62 (5–95th percentiles: 124.06–384.34) μg/L for the apixaban trough (Ctrough) and apixaban peak plasma levels (Cpeak), respectively. Stroke and bleeding were found in 8 (11.27%) and 14 patients (19.72%), respectively. There was no statistical significance for Ctrough and Cpeak in the stroke and non-stroke groups, respectively. The median of Ctrough (139.15 μg/L) in patients with bleeding was higher than that in the non-bleeding group (108.14 μg/L), but there was no statistical significance. However, multivariate analyses showed that bleeding history (odds ratio (OR): 17.62; 95% confidence interval (CI): 3.54–176.64; and p-value = 0.002) and Ctrough (OR: 1.01; 95%: CI 1.00–1.03; and p-value = 0.038) were related to bleeding events. Almost all of the patients presented apixaban plasma levels within the expected range. Interestingly, bleeding events were associated with the troughs of the apixaban plasma levels and bleeding history.
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18
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Modified thromboelastometric tests provide improved sensitivity and specificity to direct oral anticoagulants compared to standard thromboelastometric tests in-vitro. Thromb J 2022; 20:40. [PMID: 35864490 PMCID: PMC9306144 DOI: 10.1186/s12959-022-00400-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 07/05/2022] [Indexed: 11/21/2022] Open
Abstract
Background The detection of direct oral anticoagulants (DOACs) is still challenging but important in emergency patients. We recently demonstrated that modified thromboelastometry can detect rivaroxaban and dabigatran. Data on the detection rates of modified compared to standard thromboelastometric tests of apixaban and edoxaban, are missing. The aim of this in-vitro dose-effect-study was to add data on these DOACs and to evaluate thromboelastometric tests in-vitro using data of both studies. Methods The study was approved by the Ludwig-Maximilians-University ethics committee (No 17-525-2). Written informed consent was obtained from all individuals. Blood samples of healthy volunteers and samples of 10 volunteers for each DOAC were used. Blood samples were spiked with six different concentrations of edoxaban and apixaban (0ng/ml; 31.25ng/ml; 62.5ng/ml; 125ng/ml; 250 ng/ml; 500ng/ml). Modified tests (low-tissue-factor test TFTEM and ecarin-based test ECATEM) as well as standard tests (e.g. FIBTEM) analyzing extrinsic pathway of coagulation were used. Receiver operating characteristics analyzes were performed as well as regression analyzes. Results TFTEM CT correlated well with anti-Xa levels of apixaban and edoxaban (apixaban: r2 = 0.8064 p < 0.0001; edoxaban: r2 = 0.8603; p < 0.0001). The detection of direct FXa inhibitors (> 30 ng/mL) was successful with FIBTEM CT with a sensitivity and specificity of 81% and 90%, respectively. As expected, ECATEM CT was not prolonged by direct FXa-inhibitors due to its specificity for direct thrombin inhibitors. Again, TFTEM CT provided the highest sensitivity and specificity for the detection of direct FXa inhibitors with 96% and 95%, respectively. ECATEM test showed 100% sensitivity and 100% specificity for the detection of dabigatran. Conclusions Our study presents modified thromboelastometric tests with improved detection of even low DOAC concentrations > 30 ng/mL, including apixaban in-vitro. The study thus complements the previously published data on dabigatran and rivaroxaban. Validation studies must confirm the results due to the explanatory design of this study. Supplementary Information The online version contains supplementary material available at 10.1186/s12959-022-00400-3.
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Taune V, Skeppholm M, Ågren A, Wikman A, Hillarp A, Wallén H. Rapid Detection of Apixaban by a ROTEM-Based Approach and Reversibility with Andexanet Alfa or DOAC-Stop. TH OPEN 2022; 6:e238-e247. [PMID: 36046206 PMCID: PMC9423941 DOI: 10.1055/s-0042-1751072] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Accepted: 05/09/2022] [Indexed: 11/04/2022] Open
Abstract
Background
A rapid test to detect apixaban treatment would be useful in acute situations such as major bleeding, urgent surgery, or in acute thrombosis.
Objective
This article aims to study if the viscoelastic test rotational thromboelastometry (ROTEM) can rapidly detect apixaban in whole blood using modified triggers based on factor Xa (FXa) or Russell viper venom (RVV).
Method
ROTEM clotting time (CT) was measured in samples from 40 patients on apixaban treatment, and in vitro in samples spiked with apixaban (20–500 ng/mL). Commercially available trigger Ex-tem was compared with modified triggers based on FXa or RVV. Reversibility of apixaban in the samples was studied; CT was measured with and without addition of DOAC-Stop or andexanet alfa, respectively, and the difference in CT was calculated (CT
diff
).
Results
Using FXa as trigger, we detected apixaban concentrations at 20 ng/mL and above with 100% sensitivity and 100% specificity in patient samples and in vitro. Corresponding data for Ex-tem were 92% sensitivity and 100% specificity in patients, and 94% sensitivity and 100% specificity in vitro, and for RVV 97% sensitivity and 94% specificity in patients, and 97% sensitivity and 100% specificity in vitro, respectively. CT
diff
data were similar. Patient sample data were obtained within 20 minutes from sampling.
Conclusion
Apixaban at low therapeutic concentrations was detected within 20 minutes, and with high sensitivity and specificity. A trigger based on FXa outperformed the commercial trigger Ex-tem and a trigger based on RVV. ROTEM with a FXa-based trigger is a promising method to detect apixaban bedside in acute settings.
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Affiliation(s)
- Viktor Taune
- Department of Clinical Sciences, Danderyd Hospital, Division of Cardiovascular Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Mika Skeppholm
- Department of Clinical Sciences, Danderyd Hospital, Division of Cardiovascular Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Anna Ågren
- Department of Clinical Sciences, Danderyd Hospital, Division of Cardiovascular Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Agneta Wikman
- Division of Clinical Immunology and Transfusion Medicine, Department of Laboratory Medicine, Karolinska University Hospital, Stockholm, Sweden; Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Andreas Hillarp
- Department of Translational Medicine, Clinical Chemistry Malmö, Lund University, Malmö, Sweden
- Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway
| | - Håkan Wallén
- Department of Clinical Sciences, Danderyd Hospital, Division of Cardiovascular Medicine, Karolinska Institutet, Stockholm, Sweden
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A Review of Direct-acting Oral Anticoagulants and Their Use in Solid Organ Transplantation. Transplantation 2022; 106:2143-2154. [PMID: 35642975 DOI: 10.1097/tp.0000000000004195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Direct-acting oral anticoagulant (DOAC) use has increased dramatically since their introduction because of the growing evidence of proven efficacy and enhanced safety compared with warfarin and the low-molecular-weight heparins in the general population. Unfortunately, there is a dearth of quality data regarding the safety and efficacy of the DOACs in patients awaiting organ transplant and those who received a solid organ transplant. This review aims to evaluate the available literature and considerations regarding anticoagulation use in transplant recipients, focusing on preoperative, perioperative, and postoperative DOAC use.
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21
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Siriez R, Yildiz H, Bouvy C, Haguet H, Maloteau V, Hardy M, Mullier F, Dogné J, Hainaut P, Douxfils J. The edoxaban‐M4 metabolite and measurement of edoxaban by chromogenic assays in human plasma. Res Pract Thromb Haemost 2022; 6:e12680. [PMID: 35434470 PMCID: PMC9001858 DOI: 10.1002/rth2.12680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 01/13/2022] [Accepted: 01/26/2022] [Indexed: 11/08/2022] Open
Abstract
Introduction Edoxaban is the only anti-Xa inhibitor metabolized in pharmacologically active moiety that could interfere with chromogenic anti-Xa assays, especially in case of drug-drug interactions or physiological disorders. Materials and methods We evaluated the contribution of the main metabolite of edoxaban, edoxaban-M4 (M4), in 79 plasma samples from patients taking edoxaban. The total anti-Xa activity was evaluated on three different chromogenic factor Xa-based assays. Results were compared with a validated ultra-high-performance liquid chromatography coupled with a tandem mass spectrometry measurement. Edoxaban and its active M4 metabolite have also been spiked separately in normal pooled plasma to assess the sensitivity of chromogenic anti-Xa assays to both molecules individually. Results Spiked edoxaban or M4 provided different slopes of linear regression models between chromogenic and chromatographic measurement (from 0.97 for STA Liquid Anti-Xa to 1.10 for Biophen Heparin LRT Low with edoxaban and from 0.70 for Biophen DiXaI High to 0.83 for Biophen Heparin LRT High, respectively). A positive correlation is observed between the increase of the ratio M4/edoxaban with the difference between chromogenic and chromatographic measurements. Conclusion Edoxaban and M4 do not similarly impact chromogenic assays, leading to biased chromogenic estimations of ponderal concentrations. In patient samples, this impact is even more important at low concentrations or in the case of an increase in the M4/edoxaban ratio because of hepatic or renal impairments or in case of drug interactions. This study highlights the limitations and risks of error of expressing results in ponderal concentrations instead of global activity anti-Xa.
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Affiliation(s)
- Romain Siriez
- Department of Pharmacy Namur Thrombosis and Hemostasis Center (NTHC) Namur Research Institute for LIfe Sciences (NARILIS) University of Namur Namur Belgium
| | - Halil Yildiz
- Departement of Internal Medicine and Infectious Diseases Cliniques Universitaires Saint‐Luc Université Catholique de Louvain Brussels Belgium
| | | | - Hélène Haguet
- Department of Pharmacy Namur Thrombosis and Hemostasis Center (NTHC) Namur Research Institute for LIfe Sciences (NARILIS) University of Namur Namur Belgium
- Qualiblood s.a. Namur Belgium
| | - Vincent Maloteau
- Department of Pharmacy Namur Thrombosis and Hemostasis Center (NTHC) Namur Research Institute for LIfe Sciences (NARILIS) University of Namur Namur Belgium
| | - Michaël Hardy
- Université catholique de Louvain CHU UCL Namur Hematology Laboratory Namur Thrombosis and Hemostasis Center (NTHC) Namur Research Institute for Life Sciences (NARILIS) Yvoir Belgium
- Department of Anesthesiology Namur Thrombosis and Hemostasis Center (NTHC) Université catholique de Louvain CHU UCL Namur Yvoir Belgium
| | - François Mullier
- Université catholique de Louvain CHU UCL Namur Hematology Laboratory Namur Thrombosis and Hemostasis Center (NTHC) Namur Research Institute for Life Sciences (NARILIS) Yvoir Belgium
| | - Jean‐Michel Dogné
- Department of Pharmacy Namur Thrombosis and Hemostasis Center (NTHC) Namur Research Institute for LIfe Sciences (NARILIS) University of Namur Namur Belgium
| | - Philippe Hainaut
- Departement of Internal Medicine and Infectious Diseases Cliniques Universitaires Saint‐Luc Université Catholique de Louvain Brussels Belgium
| | - Jonathan Douxfils
- Department of Pharmacy Namur Thrombosis and Hemostasis Center (NTHC) Namur Research Institute for LIfe Sciences (NARILIS) University of Namur Namur Belgium
- Qualiblood s.a. Namur Belgium
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22
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Linskens EA, De Kesel P, Devreese KMJ. Direct Oral Anticoagulant removal by a DOAC filter: Impact on lupus anticoagulant testing – Evaluation on spiked and patient samples. Res Pract Thromb Haemost 2022; 6:e12633. [PMID: 35341071 PMCID: PMC8935533 DOI: 10.1002/rth2.12633] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 10/01/2021] [Accepted: 10/19/2021] [Indexed: 12/13/2022] Open
Abstract
Background DOAC Filter (DF) is a new device to overcome interference in lupus anticoagulant (LAC) testing by direct oral anticoagulants (DOACs). Objectives We evaluated DOAC removal from plasma and elimination of DOAC interference in LAC testing by DF, and impact of DF on LAC assays in a representative patient cohort, including a comparison with DOAC‐Stop (DS). Methods Normal pooled plasma (NPP) was spiked with increasing concentrations of apixaban, rivaroxaban, edoxaban, and dabigatran. DOAC and LAC was measured on untreated, DF‐treated, and DS‐treated spiked samples. Coagulation parameters and thrombin generation were measured on patient samples (n = 20) before and after DF. Patients treated with DOAC, vitamin K antagonist, or heparin and nonanticoagulated patient samples (n = 139) were tested for LAC before and after DF. Results In spiked NPP, levels were below the lower limit of quantification (LLoQ) after DF/DS treatment for all DOAC concentrations. Following DF, levels were below LLoQ for 53 of 56 DOAC‐containing patient samples. Twenty‐eight of 33 LAC‐positive DOAC‐containing samples became negative after filtration, whereas 5 remained LAC‐positive (1/5 from a patient with antiphospholipid syndrome [APS]). Four LAC‐positive DOAC‐containing samples (from patients without APS), became negative after filtration, whereas they remained LAC positive after DS. In the non‐DOAC patient groups following DF, LAC changed from positive to negative in 8 (due to a procoagulant effect) and vice versa in 2 cases. Conclusion DF reduces DOAC interference in LAC testing. As incomplete DOAC removal may occur, DOAC measurements should be performed after filtration. A procoagulant effect after filtration may lead to erroneous LAC results in non–DOAC‐containing samples. Therefore, using DF should be restricted to DOAC‐containing samples.
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Affiliation(s)
- Eleni A. Linskens
- Coagulation Laboratory Department of Laboratory Medicine Ghent University Hospital Ghent Belgium
| | - Pieter De Kesel
- Coagulation Laboratory Department of Laboratory Medicine Ghent University Hospital Ghent Belgium
| | - Katrien M. J. Devreese
- Coagulation Laboratory Department of Laboratory Medicine Ghent University Hospital Ghent Belgium
- Department of Diagnostic Sciences Ghent University Ghent Belgium
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23
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Viscoelastic Hemostatic Assays: A Primer on Legacy and New Generation Devices. J Clin Med 2022; 11:jcm11030860. [PMID: 35160311 PMCID: PMC8836477 DOI: 10.3390/jcm11030860] [Citation(s) in RCA: 41] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 01/28/2022] [Accepted: 02/02/2022] [Indexed: 02/06/2023] Open
Abstract
Viscoelastic hemostatic assay (VHAs) are whole blood point-of-care tests that have become an essential method for assaying hemostatic competence in liver transplantation, cardiac surgery, and most recently, trauma surgery involving hemorrhagic shock. It has taken more than three-quarters of a century of research and clinical application for this technology to become mainstream in these three clinical areas. Within the last decade, the cup and pin legacy devices, such as thromboelastography (TEG® 5000) and rotational thromboelastometry (ROTEM® delta), have been supplanted not only by cartridge systems (TEG® 6S and ROTEM® sigma), but also by more portable point-of-care bedside testing iterations of these legacy devices (e.g., Sonoclot®, Quantra®, and ClotPro®). Here, the legacy and new generation VHAs are compared on the basis of their unique hemostatic parameters that define contributions of coagulation factors, fibrinogen/fibrin, platelets, and clot lysis as related to the lifespan of a clot. In conclusion, we offer a brief discussion on the meteoric adoption of VHAs across the medical and surgical specialties to address COVID-19-associated coagulopathy.
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24
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Milner E, Ainsworth M, Gleaton M, Bookstaver D. Assessment of Anti-Xa activity in patients receiving concomitant apixaban with strong p-glycoprotein inhibitors and statins. J Clin Pharm Ther 2022; 47:668-675. [PMID: 35032137 PMCID: PMC9305439 DOI: 10.1111/jcpt.13596] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 12/14/2021] [Accepted: 12/15/2021] [Indexed: 12/27/2022]
Abstract
WHAT IS KNOWN AND OBJECTIVES Although the apixaban Food and Drug Administration (FDA) package insert recommends dose reduction in patients administered dual strong inhibitors of p-glycoprotein (P-gp) and cytochrome P-450 (CYP) 3A4, there are limited published data regarding potential drug-drug interactions between apixaban (Eliquis) and common p-glycoprotein (P-gp) and CYP3A4 inhibitors co-administered with statins. The aim of this study was to investigate the degree of elevation relative to apixaban serum peak and trough concentration after the co-administration of amiodarone, diltiazem and statins (atorvastatin, rosuvastatin and simvastatin). METHODS Patients prescribed apixaban 5mg twice daily for at least one week were identified from the anticoagulation clinic database and contacted for potential enrolment. A total of 117 volunteers were enrolled with eight excluded due to discontinued use, resulting in 109 volunteers (44 females and 65 males delineated into age groups 40-64 and ≥65 years old) completing the observational study. Fifty-five volunteers were administered apixaban without the P-gp inhibitors amiodarone or diltiazem, with or without statins (atorvastatin, rosuvastatin and simvastatin). Fifty-four volunteers were administered apixaban with either amiodarone or diltiazem, with or without statins (atorvastatin, rosuvastatin or simvastatin). Peak and trough concentrations were assessed for each patient utilizing an apixaban anti-Xa assay. RESULTS Of the combinations studied, the mean apixaban trough concentration upon co-administration of amiodarone without a statin was elevated compared to apixaban alone (experimental 156.83 +/- 79.59 ng/ml vs. control 104.09 +/- 44.56 ng/ml; p = 0.04). The co-administration of diltiazem and rosuvastatin, and the administration of amiodarone without a statin led to greater than 1.5-fold increase in apixaban concentrations (peak experimental 315.19 +/- 157.53 ng/ml vs control 207.6 +/- 83.38 ng/ml; p = 0.08 and trough experimental 182.03 +/- 95.93 ng/ml vs control 112.32 +/- 37.78 ng/ml; p = 0.17) suggesting the need to assess dose adjustment for patients per the FDA package insert. In addition, the aggregated mean peak (p = 0.0056) and trough (p = 0.0089) elevation of CYP3A4 experimental groups (atorvastatin and simvastatin) co-administered apixaban and diltiazem were statistically significant compared with the aggregated non-CYP3A4 control groups (no statin and rosuvastatin). WHAT IS NEW AND CONCLUSION Herein, we report novel data regarding peak and trough apixaban concentrations after concomitant administration of P-gp and CYP3A4 inhibitors (amiodarone or diltiazem) co-administered with statins (atorvastatin, rosuvastatin or simvastatin). Providers should consider utilizing the apixaban anti-Xa assay or comparative heparin anti-Xa assay to determine if patients require dose reduction to decrease adverse events in high-risk patients prescribed apixaban and concomitant p-glycoprotein and CYP3A4 inhibitors amiodarone or diltiazem with and without a CYP3A4 or non-3A4 statin.
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Affiliation(s)
- Erin Milner
- Dwight D. Eisenhower Army Medical Center, Ft Gordon, Georgia, USA.,Department of Chemistry and Life Science, United States Military Academy, West Point, New York, USA.,Department of Medicine, Uniformed Services University, Bethesda, Maryland, USA
| | - Michael Ainsworth
- Department of Chemistry and Life Science, United States Military Academy, West Point, New York, USA
| | - Melinda Gleaton
- Dwight D. Eisenhower Army Medical Center, Ft Gordon, Georgia, USA
| | - David Bookstaver
- Dwight D. Eisenhower Army Medical Center, Ft Gordon, Georgia, USA
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25
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Örd L, Marandi T, Märk M, Raidjuk L, Kostjuk J, Banys V, Krause K, Pikta M. Evaluation of DOAC Dipstick Test for Detecting Direct Oral Anticoagulants in Urine Compared with a Clinically Relevant Plasma Threshold Concentration. Clin Appl Thromb Hemost 2022; 28:10760296221084307. [PMID: 35249379 PMCID: PMC8905053 DOI: 10.1177/10760296221084307] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Measuring direct oral anticoagulant (DOAC) concentrations might be necessary in certain clinical situations but is not routinely performed. The DOAC Dipstick is a new rapid test for detecting DOACs in urine. The aim of this study was to evaluate the possible uses and limitations of the DOAC Dipstick and to compare visual analysis and DOASENSE Reader analysis of DOAC Dipstick pads. Plasma and urine samples were collected from 23 patients taking DOACs. DOAC concentrations in plasma and urine were measured by chromogenic substrate assays and in urine also by the DOAC Dipstick. Plasma concentrations were dichotomized at a threshold of ≥30 ng/mL. Patient samples were compared with samples from control individuals not using anticoagulants (n = 10) and with DOASENSE control urines. The Combur-10 test was used to measure parameters that may affect urine color and hence the interpretation of the DOAC Dipstick result. DOAC Dipstick test results were positive in 21/23 patient urine samples at a plasma DOAC concentration of ≥30 ng/mL and in 2/23 patient urine samples at a plasma DOAC concentration of <30 ng/mL. Inter-observer agreement was above 90% for visual analysis of patient urine samples and was 100% for DOASENSE Reader analysis of patient urines and for analysis of control group urines and DOASENSE control urines. Abnormalities in urine color detected by the Combur-10 test did not affect the DOAC Dipstick results. DOAC Dipstick detects DOACs in urine at a plasma threshold of ≥30 ng/mL. Positive DOAC Dipstick results should be confirmed by measuring DOAC plasma concentration.
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Affiliation(s)
- Lenna Örd
- Department of Emergency Medicine, 91887North Estonia Medical Centre, Tallinn, Estonia.,Institute of Clinical Medicine, Faculty of Medicine, 37546University of Tartu, Tartu, Estonia
| | - Toomas Marandi
- Centre of Cardiology, 91887North Estonia Medical Centre, Tallinn, Estonia.,Department of Cardiology, 37546University of Tartu, Tartu, Estonia
| | - Marit Märk
- Department of Internal Medicine, 91887North Estonia Medical Centre, Tallinn, Estonia
| | - Leonid Raidjuk
- Department of Internal Medicine, 91887North Estonia Medical Centre, Tallinn, Estonia
| | - Jelena Kostjuk
- Department of Internal Medicine, 91887North Estonia Medical Centre, Tallinn, Estonia
| | - Valdas Banys
- Department of Physiology, Biochemistry, Microbiology and Laboratory Medicine, Institute of Biomedical Sciences, Faculty of Medicine, 54694Vilnius University, Vilnius, Lithuania
| | | | - Marika Pikta
- Department of Laboratory Medicine, 91887North Estonia Medical Centre, Tallinn, Estonia.,Department of Health Technologies, 54561Tallinn University of Technology, Tallinn, Estonia
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26
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Perifanis V, Neokleous N, Tsakiris DA. Update on laboratory testing and hemostasis assessment in patients receiving direct oral anticoagulants (DOACs). THROMBOSIS UPDATE 2021. [DOI: 10.1016/j.tru.2021.100084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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27
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Systemic Anticoagulation and Reversal. Surg Clin North Am 2021; 102:53-63. [PMID: 34800389 DOI: 10.1016/j.suc.2021.09.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
An increasing number of patients are on anticoagulation for a variety of indications. Patients on anticoagulation who present to the hospital with life-threatening hemorrhage, whether trauma related or not, must be assessed for the reversal of anticoagulation. Identification of the type of anticoagulation, the timing of the most recent usage of anticoagulation, and the efficacy of the anticoagulation all have an impact on whether reversal agents should be used. There are a variety of reversal agents, both nonspecific and specific, that could be used for reversal; however, not all reversal agents work for all anticoagulation medication. As more anticoagulation medications are used and indications expand, providers must be aware of the reversal agents available and the efficacy and indications for these reversal agents.
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28
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Abstract
From preoperative medications to intraoperative needs to postoperative thromboprophylaxis, anticoagulants are encountered throughout the perioperative period. This review focuses on coagulation testing clinicians utilize to monitor the effects of these medications.
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29
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Lucas F, Stecker MS, Pozdnyakova O, Connors JM, Battinelli EM. Rivaroxaban-calibrated chromogenic anti-Xa assay in cirrhosis: Use to rule out disseminated intravascular coagulation. Res Pract Thromb Haemost 2021; 5:e12594. [PMID: 34646974 PMCID: PMC8500831 DOI: 10.1002/rth2.12594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 08/08/2021] [Accepted: 08/11/2021] [Indexed: 11/13/2022] Open
Abstract
Peritoneovenous shunts (PVSs) are used to relieve ascites in cirrhosis. Disseminated intervascular coagulation (DIC) is a complication of PVSs requiring immediate PVS removal. We report a patient who developed new elevations of prothrombin time (PT) and activated partial thromboplastin time (aPTT) 6 hours after PVS placement, concerning for new-onset DIC. We address the key clinical question of distinguishing DIC from rivaroxaban effect on labs. The patient took rivaroxaban 3 hours after PVS placement, suggesting rivaroxaban effect. Rivaroxaban-calibrated anti-Xa level was in the expected treatment range. Over 12 hours, coagulation labs and rivaroxaban levels declined, with no evidence of DIC. The sudden PT/aPTT increase was attributed to rivaroxaban, however, the distinction between DIC and rivaroxaban effect was possible only with the rapid availability of rivaroxaban levels. While there are no US Food and Drug Administration-approved tests for rivaroxaban levels in the United States, this case demonstrates they can have significant clinical impact, encouraging more widespread adaptation of these assays.
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Affiliation(s)
- Fabienne Lucas
- Department of PathologyBrigham and Women’s HospitalHarvard Medical SchoolBostonMassachusettsUSA
| | - Michael S. Stecker
- Division of Angiography and Interventional RadiologyDepartment of RadiologyBrigham and Women’s HospitalHarvard Medical SchoolBostonMassachusettsUSA
| | - Olga Pozdnyakova
- Department of PathologyBrigham and Women’s HospitalHarvard Medical SchoolBostonMassachusettsUSA
| | - Jean M. Connors
- Division of HematologyDepartment of MedicineBrigham and Women’s HospitalHarvard Medical SchoolBostonMassachusettsUSA
| | - Elisabeth M. Battinelli
- Division of HematologyDepartment of MedicineBrigham and Women’s HospitalHarvard Medical SchoolBostonMassachusettsUSA
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30
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May JE, Siniard RC, Taylor LJ, Marques MB, Gangaraju R. From Activated Partial Thromboplastin Time to Antifactor Xa and Back Again. Am J Clin Pathol 2021; 157:321-327. [PMID: 34562001 PMCID: PMC8891818 DOI: 10.1093/ajcp/aqab135] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 07/14/2021] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVES Monitoring is essential to safe anticoagulation prescribing and requires close collaboration among pathologists, clinicians, and pharmacists. METHODS We describe our experience in the evolving strategy for laboratory testing of unfractionated heparin (UFH). RESULTS An intrainstitutional investigation revealed significant discordance between activated partial thromboplastin time (aPTT) and antifactor Xa (anti-Xa) assays, prompting a transition from the former to the latter in 2013. With the increasing use of oral factor Xa inhibitors (eg, apixaban, rivaroxaban, edoxaban, betrixaban), which interfere with the anti-Xa assay, we adapted our protocol again to incorporate aPTT in patients admitted on oral Xa inhibitors who require transition to UFH. CONCLUSIONS Our experience demonstrates key challenges in anticoagulation and highlights the importance of clinical pathologists in helping health systems adapt to the changing anticoagulation landscape.
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Affiliation(s)
- Jori E May
- Division of Hematology and Oncology, Department of Medicine, University of Alabama at Birmingham, Birmingham, USA,Corresponding author: Jori E. May, MD;
| | - Rance Chad Siniard
- Division of Laboratory Medicine, Department of Pathology, School of Medicine, University of Alabama at Birmingham, Birmingham, USA
| | - Laura J Taylor
- UAB Coagulation Service, School of Medicine, University of Alabama at Birmingham, Birmingham, USA
| | - Marisa B Marques
- Division of Laboratory Medicine, Department of Pathology, School of Medicine, University of Alabama at Birmingham, Birmingham, USA
| | - Radhika Gangaraju
- Division of Hematology and Oncology, Department of Medicine, University of Alabama at Birmingham, Birmingham, USA,Institute for Cancer Outcomes and Survivorship, School of Medicine, University of Alabama at Birmingham, Birmingham, USA
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31
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Gosselin RC. Review of coagulation preanalytical variables with update on the effect of direct oral anticoagulants. Int J Lab Hematol 2021; 43 Suppl 1:109-116. [PMID: 34288452 DOI: 10.1111/ijlh.13585] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 04/02/2021] [Accepted: 04/28/2021] [Indexed: 12/18/2022]
Abstract
There are many preanalytical variables (PAV) that are known to affect coagulation testing. The more commonly acknowledged PAV addressed by the clinical laboratory tend to start with their influence on blood collection, but realistically coagulation PAV starts with the patient, where the laboratory has less influence or control. Patient selection and appropriate timing for blood collection may be integral for assuring proper diagnosis and management. Laboratory control and assurance for ideal phlebotomy practice would mitigate most PAVs related to blood collection to minimize suboptimal sample collection. Laboratory oversight of sample transportation, processing and storage will assure sample integrity until testing can be facilitated. The purpose of this document is to review common PAV that should be taken into consideration when ordering, performing and interpreting a coagulation test result, with additional attention to the effect of direct oral anticoagulants (DOACs).
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Affiliation(s)
- Robert C Gosselin
- Hemostasis & Thrombosis Center, Davis Health System, University of California, Sacramento, CA, USA
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32
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Volod O, Rollins-Raval M, Goodwin AJ, Higgins RA, Long T, Chandler WL, Harris NS, Pham HP, Isom JA, Moser K, Olson JD, Smock KJ, VanSandt A, Wool G, Chen D. The Interlaboratory Performance in Measurement of Dabigatran and Rivaroxaban: Results of the College of American Pathologists External Quality Assessment Program. Arch Pathol Lab Med 2021; 146:145-153. [PMID: 34133726 DOI: 10.5858/arpa.2020-0633-cp] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/22/2021] [Indexed: 11/06/2022]
Abstract
CONTEXT.— Assessing direct oral anticoagulant (DOAC) drug levels by reliable laboratory assays is necessary in a number of clinical scenarios. OBJECTIVE.— To evaluate the performance of DOAC-specific assays for various concentrations of dabigatran and rivaroxaban, assess the interlaboratory variability in measurement of these DOACs, and investigate the responsiveness of the routine clotting assays to various concentrations of these oral anticoagulants. DESIGN.— College of American Pathologists proficiency testing survey data from 2013 to 2016 were summarized and analyzed. RESULTS.— For dabigatran, the interlaboratory coefficient of variation (CV) of ecarin chromogenic assay was broad (ranging from 7.5% to 29.1%, 6.3% to 15.5%, and 6.8% to 9.0% for 100-ng/mL, 200-ng/mL, and 400-ng/mL targeted drug concentrations, respectively). The CV for diluted thrombin time for dabigatran was better overall (ranging from 11.6% to 17.2%, 9.3% to 12.3, and 7.1% to 11.2% for 100 ng/mL, 200 ng/mL, and 400 ng/mL, respectively). The rivaroxaban-calibrated anti-Xa assay CVs also showed variability (ranging from 11.5% to 22.2%, 7.2% to 10.9%, and 6.4% to 8.1% for 50-ng/mL, 200-ng/mL, and 400-ng/mL targeted drug concentrations, respectively). The prothrombin time (PT) and activated partial thromboplastin time (aPTT) showed variable dose and reagent-dependent responsiveness to DOACs: PT was more responsive to rivaroxaban and aPTT to dabigatran. The undiluted thrombin time showed maximum prolongation across all 3 dabigatran concentrations, making it too sensitive for drug-level monitoring, but supporting its use as a qualitative screening assay. CONCLUSIONS.— DOAC-specific assays performed reasonably well. While PT and aPTT cannot be used safely to determine DOAC degree of anticoagulation, a normal thrombin time excludes the presence of dabigatran.
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Affiliation(s)
- Oksana Volod
- From the Department of Pathology, Cedars-Sinai Medical Center, Los Angeles, California (Volod)
| | - Marian Rollins-Raval
- The Department of Pathology, The University of New Mexico, Albuquerque (Rollins-Raval)
| | - Andrew J Goodwin
- The Department of Pathology, University of Vermont Medical Center, Burlington (Goodwin IV)
| | - Russell A Higgins
- The Department of Pathology and Laboratory Medicine, University of Texas Health, San Antonio (Higgins, Olson)
| | - Thomas Long
- Biostatistics, College of American Pathologists, Northfield, Illinois (Long)
| | - Wayne L Chandler
- The Department of Pathology and Laboratory Medicine, Seattle Children's Hospital, Seattle, Washington (Chandler)
| | - Neil S Harris
- The Department of Pathology, University of Florida Health, Gainesville (Harris)
| | - Huy P Pham
- National Marrow Donor Program, Seattle Collection Center, Seattle, Washington (Pham)
| | - James Alexander Isom
- The Department of Pathology, University of South Florida Moffitt Cancer Center, Tampa (Isom)
| | - Karen Moser
- The Department of Pathology, University of Utah, Salt Lake City (Moser, Smock)
| | - John D Olson
- The Department of Pathology and Laboratory Medicine, University of Texas Health, San Antonio (Higgins, Olson)
| | - Kristi J Smock
- The Department of Pathology, University of Utah, Salt Lake City (Moser, Smock)
| | - Amanda VanSandt
- The Department of Pathology Oregon Health & Science University, Portland (VanSandt)
| | - Geoffrey Wool
- The Department of Pathology and Laboratory Medicine, University of Chicago, Chicago, Illinois (Wool)
| | - Dong Chen
- The Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, Minnesota (Chen)
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33
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Zhuang Y, Dai LF, Chen MQ. Efficacy and safety of non-vitamin K antagonist oral anticoagulants for venous thromboembolism: a meta-analysis. JRSM Open 2021; 12:20542704211010686. [PMID: 34178359 PMCID: PMC8207293 DOI: 10.1177/20542704211010686] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Objective Several trials had compared the efficacy and safety between non-vitamin K antagonist oral anticoagulants and warfarin for acute venous thromboembolism, but the results were incomplete. This updated review comprehensively assessed the efficacy and safety of non-vitamin K antagonist oral anticoagulants for venous thromboembolism. Design Meta-analysis of randomised control trials. Six databases were searched from January 2000 to December 2018. Setting Adult patients had got non-vitamin K antagonist oral anticoagulants or warfarin for venous thromboembolism. Participants Randomised control trials that compared the efficacy and safety between non-vitamin K antagonist oral anticoagulants and warfarin. Main outcome measures The efficacy and safety of non-vitamin K antagonist oral anticoagulants . Results Seven studies involving 29,879 cases were included, among which 14,943 cases were assigned to non-vitamin K antagonist oral anticoagulants group and 14,936 cases to warfarin group. Meta-analysis showed that compared with warfarin, recurrent venous thromboembolism (odds ratio 0.94 [95% confidence interval 0.81 to 1.11]), death related to venous thromboembolism or fatal pulmonary embolism (odds ratio 1.00 [95% confidence interval 0.63 to 1.60]), symptomatic deep-vein thrombosis (odds ratio 0.88 [95% confidence interval 0.72 to 1.09]), symptomatic nonfatal pulmonary embolism (odds ratio 1.03 [(95% confidence interval 0.82 to 1.30]) and all deaths (odds ratio 0.92 [95% confidence interval 0.76 to 1.12]) are similar in non-vitamin K antagonist oral anticoagulants group, but major bleeding event (odds ratio 0.61 [95% confidence interval 0.50 to 0.75]) and clinically relevant non-major bleeding event (odds ratio [95% confidence interval 0.53 to 0.85]) are less in non-vitamin K antagonist oral anticoagulants group. . Conclusions For the treatment of venous thromboembolism, non-vitamin K antagonist oral anticoagulants is as effective as warfarin, and has a better safety profile than warfarin.
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Affiliation(s)
- Yan Zhuang
- Department of Critical Care Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Jiangsu Province Hospital of Chinese Medicine, Nanjing 210029 China
| | - Lin-Feng Dai
- Department of Critical Care Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Jiangsu Province Hospital of Chinese Medicine, Nanjing 210029 China
| | - Ming-Qi Chen
- Department of Critical Care Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Jiangsu Province Hospital of Chinese Medicine, Nanjing 210029 China
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Hafer A, McCann L. Direct oral anticoagulant reversal: An update. Nursing 2021; 51:54-64. [PMID: 34014879 DOI: 10.1097/01.nurse.0000743104.69943.67] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
ABSTRACT The rise in direct oral anticoagulant (DOAC) use means nurses must understand the reversal of these agents in case of bleeding. Depending on bleed severity, as well as other criteria, pharmacologic reversal can be considered in place of supportive care alone. Knowledge of literature surrounding DOAC reversal is crucial.
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Affiliation(s)
- Andrea Hafer
- Andrea Hafer is a critical care clinical pharmacist at Riddle Hospital in Media, Pa., and Lindsay McCann is a critical care clinical pharmacy specialist at Bryn Mawr Hospital in Bryn Mawr, Pa
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Sukumar S, Cabero M, Tiu S, Fang MC, Kogan SC, Schwartz JB. Anti-factor Xa activity assays of direct-acting oral anticoagulants during clinical care: An observational study. Res Pract Thromb Haemost 2021; 5:e12528. [PMID: 34013157 PMCID: PMC8114026 DOI: 10.1002/rth2.12528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 04/09/2021] [Accepted: 04/14/2021] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Direct-acting oral anticoagulants (DOACs) are increasingly used to prevent and treat thromboembolism. Although measurement of DOAC concentrations is not currently recommended as part of routine patient care, measurement of DOAC concentrations with anti-factor Xa activity assays have recently become clinically available. OBJECTIVES Our goal was to determine the clinical conditions under which DOAC concentration measurements are requested. MATERIALS AND METHODS Retrospective electronic medical record analysis of indications for DOAC concentration measurements by anti-factor Xa activity assay at a single academic medical center from July 2015 through April 2020. RESULTS AND CONCLUSIONS Ninety-one DOAC concentration measurements were made in 69 patients: 28 received apixaban and 41 received rivaroxaban. The most frequent indication for concentration measurement was drug exposure assessment (38/69; 55%) in patients with potentially altered pharmacokinetics (altered absorption or clearance), recurrent thromboembolic events, or possible medication nonadherence. Fourteen of 69 patients had repeated measurements during preoperative evaluation before emergent surgery; one-third of those with detectable levels upon presentation had repeated measurements until concentrations were undetectable. Levels were undetectable in 4 of 4 patients scheduled for elective surgery. Eleven of 69 patients had DOAC measurements in the setting of major bleeding; 5 of these 11 received a specific DOAC reversal agent. While most of the observed indications appear in clinical guidelines, altered absorption does not. Overall, clinicians are requesting DOAC concentration measurements to evaluate drug exposure in patients with conditions that might alter the absorption or clearance of the DOAC, to evaluate surgical bleeding risk, and in the setting of major bleeding.
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Affiliation(s)
- Smrithi Sukumar
- School of MedicineUniversity of CaliforniaSan FranciscoCAUSA
| | - Melissa Cabero
- Clinical Laboratory of UCSF Medical CenterSan FranciscoCAUSA
| | - Sharon Tiu
- Clinical Laboratory of UCSF Medical CenterSan FranciscoCAUSA
| | - Margaret C. Fang
- Department of MedicineUniversity of CaliforniaSan FranciscoCAUSA
| | - Scott C. Kogan
- Laboratory MedicineUniversity of CaliforniaSan FranciscoCAUSA
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36
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Cohen H, Efthymiou M, Devreese KMJ. Monitoring of anticoagulation in thrombotic antiphospholipid syndrome. J Thromb Haemost 2021; 19:892-908. [PMID: 33325604 DOI: 10.1111/jth.15217] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 12/07/2020] [Accepted: 12/09/2020] [Indexed: 12/23/2022]
Abstract
Anticoagulation is central to the management of thrombotic antiphospholipid syndrome (APS). The standard anticoagulant treatment for thrombotic APS is life-long warfarin or an alternative vitamin K antagonist. The role of direct oral anticoagulants for thrombotic APS is not established due to the lack of definitive evidence and has recently been addressed in international guidance. Other anticoagulant options include low molecular weight heparin, unfractionated heparin, and fondaparinux. In APS patients, lupus anticoagulant can affect phospholipid-dependent coagulation monitoring tests, so that they may not reflect true anticoagulation intensity. Accurate assessment of anticoagulation intensity is essential, to optimize anticoagulant dosing and facilitate thrombus resolution; minimize the risk of recurrent thrombosis or bleeding; inform assessment of whether recurrent thrombosis is related to breakthrough thrombosis while on therapeutic anticoagulation, subtherapeutic anticoagulation, non-adherence, or spurious results; and guide the management of bleeding. Knowledge of anticoagulant intensity also informs assessment and comparison of anticoagulation regimens in clinical studies. Considerations regarding anticoagulation dosing and/or monitoring of thrombotic APS patients underpin appropriate management in special situations, notably APS-related severe renal impairment, which can occur in APS or APS/systemic lupus erythematosus-related nephropathy or catastrophic APS; and APS-related thrombocytopenia. Anticoagulant dosing and monitoring in thrombotic APS patients also require consideration in anticoagulant-refractory APS and during pregnancy. In this review, we summarize the tests generally used in monitoring anticoagulant therapy, use of the main anticoagulants considered for thrombotic APS, lupus anticoagulant effects on anticoagulation monitoring tests, and strategies for appropriate anticoagulant monitoring in thrombotic APS.
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Affiliation(s)
- Hannah Cohen
- Haemostasis Research Unit, Department of Haematology, University College London, London, UK
- Department of Haematology, University College London Hospitals NHS Foundation Trust, London, UK
| | - Maria Efthymiou
- Haemostasis Research Unit, Department of Haematology, University College London, London, UK
| | - Katrien M J Devreese
- Coagulation Laboratory, Department of Laboratory Medicine, Department of Diagnostic Sciences, Ghent University Hospital, Ghent University, Ghent, Belgium
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Groene P, Wagner D, Kammerer T, Kellert L, Giebl A, Massberg S, Schäfer ST. Viscoelastometry for detecting oral anticoagulants. Thromb J 2021; 19:18. [PMID: 33726769 PMCID: PMC7962229 DOI: 10.1186/s12959-021-00267-w] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 03/01/2021] [Indexed: 12/26/2022] Open
Abstract
Background Determination of anticoagulant therapy is of pronounced interest in emergency situations. However, routine tests do not provide sufficient insight. This study was performed to investigate the impact of anticoagulants on the results of viscoelastometric assays using the ClotPro device. Methods This prospective, observational study was conducted in patients receiving dabigatran, factor Xa (FXa)-inhibitors, phenprocoumon, low molecular weight heparin (LMWH) or unfractionated heparin (UFH) (local ethics committee approval number: 17–525-4). Healthy volunteers served as controls. Viscoelastometric assays were performed, including the extrinsic test (EX-test), intrinsic test (IN-test) Russel’s viper venom test (RVV-test), ecarin test (ECA-test), and the tissue plasminogen activator test (TPA-test). Results 70 patients and 10 healthy volunteers were recruited. Clotting time in the EX-test (CTEX-test) was significantly prolonged versus controls by dabigatran, FXa inhibitors and phenprocoumon. CTIN-test was prolonged by dabigatran, FXa inhibitors and UFH. Dabigatran, FXa inhibitors and UFH significantly prolonged CTRVV-test in comparison with controls (median 200, 207 and 289 vs 63 s, respectively; all p < 0.0005). Only dabigatran elicited a significant increase in CTECA-test compared to controls (median 307 vs 73 s; p < 0.0001). CTECA-test correlated strongly with dabigatran plasma concentration (measured by anti-IIa activity; r = 0.9970; p < 0.0001) and provided 100% sensitivity and 100% specificity for detecting dabigatran. Plasma concentrations (anti-XA activity) of FXa inhibitors correlated with CTRVV-test (r = 0.7998; p < 0.0001), and CTRVV-test provided 83% sensitivity and 64% specificity for detecting FXa inhibitors. Conclusions In emergency situations, ClotPro viscoelastometric assessment of whole-blood samples may help towards determining the presence and type of anticoagulant class that a patient is taking. Trial registration German clinical trials database ID: DRKS00015302. Supplementary Information The online version contains supplementary material available at 10.1186/s12959-021-00267-w.
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Affiliation(s)
- Philipp Groene
- Department of Anaesthesiology, University Hospital Munich, LMU Munich, Marchioninistraße 15, 81377, Munich, Germany.
| | - Daniela Wagner
- Department of Anaesthesiology, University Hospital Munich, LMU Munich, Marchioninistraße 15, 81377, Munich, Germany
| | - Tobias Kammerer
- Department of Anaesthesiology, University Hospital Munich, LMU Munich, Marchioninistraße 15, 81377, Munich, Germany.,Department of Anaesthesiology and Intensive Care Medicine, University Hospital of Cologne, Cologne, Germany
| | - Lars Kellert
- Department of Neurology, University Hospital Munich, LMU Munich, Munich, Germany
| | - Andreas Giebl
- Department of Transfusion Medicine and Hemostaseology, University Hospital Augsburg, Augsburg, Germany
| | - Steffen Massberg
- Department of Internal Medicine I - Cardiology, University Hospital Munich, LMU Munich, Munich, Germany
| | - Simon Thomas Schäfer
- Department of Anaesthesiology, University Hospital Munich, LMU Munich, Marchioninistraße 15, 81377, Munich, Germany
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McRae HL, Militello L, Refaai MA. Updates in Anticoagulation Therapy Monitoring. Biomedicines 2021; 9:262. [PMID: 33800804 PMCID: PMC8001784 DOI: 10.3390/biomedicines9030262] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 02/27/2021] [Accepted: 03/03/2021] [Indexed: 11/29/2022] Open
Abstract
In the past six decades, heparin and warfarin were the primary anticoagulants prescribed for treatment and prophylaxis of venous thromboembolism worldwide. This has been accompanied by extensive clinical knowledge regarding dosing, monitoring, and reversal of these anticoagulants, and the resources required to do so have largely been readily available at small and large centers alike. However, with the advent of newer oral and parenteral anticoagulants such as low molecular weight heparins, factor Xa inhibitors, and direct thrombin inhibitors in recent years, new corresponding practice guidelines have also emerged. A notable shift in the need for monitoring and reversal agents has evolved as well. While this has perhaps streamlined the process for physicians and is often desirable for patients, it has also left a knowledge and resource gap in clinical scenarios for which urgent reversal and monitoring is necessary. An overview of the currently available anticoagulants with a focus on the guidelines and available tests for anticoagulant monitoring will be discussed in this article.
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Affiliation(s)
| | | | - Majed A. Refaai
- Department of Pathology and Laboratory Medicine, Transfusion Medicine Division, Hemostasis and Thrombosis Unit, University of Rochester Medical Center, Rochester, NY 14642, USA; (H.L.M.); (L.M.)
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Jilma-Stohlawetz P, Lysy K, Sunder-Plassmann R, Belik S, Jilma B, Pabinger I, Quehenberger P. Limitations of a calibrated, quantitative APC-R assay under routine conditions. Int J Lab Hematol 2020; 43:318-323. [PMID: 33131213 DOI: 10.1111/ijlh.13378] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 09/10/2020] [Accepted: 10/03/2020] [Indexed: 11/28/2022]
Abstract
INTRODUCTION The aim of this study was to evaluate the Hemoclot Quanti. V-L assay in various clinical conditions. METHODS We compared the Hemoclot Quanti.V-L assay with DNA testing and with the Pefakit assay in 60 normal (no mutation) vs carriers of the factor V (FV) Leiden mutation (56 heterozygous and three homozygous). We further investigated the interference of lupus anticoagulant on test results in normal and heterozygous individuals and of direct oral anticoagulants (DOACs) at trough and peak levels. Additionally, DOAC-Remove was tested in samples containing DOACs at peak levels. We further evaluated the influence of FV deficiency on this quantitative assay. RESULTS There was a 100% agreement between the Quant. V-L assay and DNA testing in 60 normal individuals. However, 1.85% of heterozygous and 33% of homozygous samples were falsely classified with the quantitative assay, and no misclassification was observed with the Pefakit assay. Lupus anticoagulant did not influence the test results of the quantitative assay. DOACs also interfered with test results in heterozygous patients, but this effect was prevented with the DOAC-Remove procedure. Even mild FV deficiency affected the test results of the quantitative assay in heterozygous patients leading either to misclassification or the need for subsequent PCR testing. CONCLUSION The quantitative FV-L assay has several limitations, especially FV deficiency and the presence of DOACs have to be ruled out before running this quantitative assay.
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Affiliation(s)
| | - Katharina Lysy
- Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria
| | | | - Sabine Belik
- Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria
| | - Bernd Jilma
- Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Ingrid Pabinger
- Division of Haematology and Haemostaseology, Department of Medicine I, Medical University of Vienna, Vienna, Austria
| | - Peter Quehenberger
- Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria
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40
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Evrard J, Hardy M, Dogné JM, Lessire S, Maloteau V, Mullier F, Douxfils J. Are the DOAC plasma level thresholds appropriate for clinical decision-making? A reappraisal using thrombin generation testing. Int J Lab Hematol 2020; 43:e48-e51. [PMID: 33037773 DOI: 10.1111/ijlh.13356] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 09/04/2020] [Accepted: 09/05/2020] [Indexed: 11/30/2022]
Affiliation(s)
- Jonathan Evrard
- Department of Pharmacy, Namur Thrombosis and Hemostasis Center (NTHC), Namur Research Institute for Life Sciences (NARILIS), University of Namur, Namur, Belgium
| | - Michaël Hardy
- Department of Anesthesiology, CHU UCL Namur, Namur Thrombosis and Hemostasis Center (NTHC), Namur Research Institute for Life Sciences (NARILIS), Université catholique de Louvain, Yvoir, Belgium.,Hematology Laboratory, CHU UCL Namur, Namur Thrombosis and Hemostasis Center (NTHC), Namur Research Institute for Life Sciences (NARILIS), Université catholique de Louvain, Yvoir, Belgium
| | - Jean-Michel Dogné
- Department of Pharmacy, Namur Thrombosis and Hemostasis Center (NTHC), Namur Research Institute for Life Sciences (NARILIS), University of Namur, Namur, Belgium.,Namur Biobank-eXchange (NAB-X), University of Namur, Namur, Belgium
| | - Sarah Lessire
- Department of Anesthesiology, CHU UCL Namur, Namur Thrombosis and Hemostasis Center (NTHC), Namur Research Institute for Life Sciences (NARILIS), Université catholique de Louvain, Yvoir, Belgium
| | - Vincent Maloteau
- Department of Pharmacy, Namur Thrombosis and Hemostasis Center (NTHC), Namur Research Institute for Life Sciences (NARILIS), University of Namur, Namur, Belgium
| | - François Mullier
- Hematology Laboratory, CHU UCL Namur, Namur Thrombosis and Hemostasis Center (NTHC), Namur Research Institute for Life Sciences (NARILIS), Université catholique de Louvain, Yvoir, Belgium
| | - Jonathan Douxfils
- Department of Pharmacy, Namur Thrombosis and Hemostasis Center (NTHC), Namur Research Institute for Life Sciences (NARILIS), University of Namur, Namur, Belgium.,Qualiblood s.a, Namur, Belgium
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41
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Siriez R, Dogné JM, Gosselin R, Laloy J, Mullier F, Douxfils J. Comprehensive review of the impact of direct oral anticoagulants on thrombophilia diagnostic tests: Practical recommendations for the laboratory. Int J Lab Hematol 2020; 43:7-20. [PMID: 32946681 DOI: 10.1111/ijlh.13342] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 08/24/2020] [Accepted: 08/26/2020] [Indexed: 12/28/2022]
Abstract
There is a laboratory and clinical need to know the impact of direct oral anticoagulants (DOACs) on diagnostic tests to avoid misinterpretation of results. Although the regulatory labelling documents provide some information about the influences of each DOAC on diagnostic tests, these are usually limited to some of the most common tests and no head to head comparison is available. In this paper, we report the impact of DOACs on several thrombophilia tests, including assessment of antithrombin, protein S and protein C activity assays, detection of activated protein C resistance and assays used for lupus anticoagulant. Results are compared and discussed with data obtained from literature. The final goal of this comprehensive review is to provide practical recommendations for laboratories to avoid misdiagnosis due to oral direct factor Xa (FXa) or IIa (FIIa) inhibitors. Overall, oral direct FXa (apixaban, betrixaban, edoxaban and rivaroxaban) and FIIa (dabigatran) antagonists may affect clot-based thrombophilia diagnostic tests resulting in false-positive or false-negative results. An effect on FIIa-based thrombophilia diagnostic tests is observed with dabigatran but not with anti-FXa DOACs and conversely for FXa-based thrombophilia diagnostic tests. No impact was observed with antigenic/chromogenic methods for the assessment of protein S and C activity. In conclusion, interpretation of thrombophilia diagnostic tests results should be done with caution in patients on DOACs. The use of a device/chemical compound able to remove or antagonize the effect of DOACs or the development of new diagnostic tests insensitive to DOACs should be considered to minimize the risk of false results.
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Affiliation(s)
- Romain Siriez
- Department of Pharmacy, Namur Thrombosis and Hemostasis Center (NTHC), Namur Research Institute for LIfe Sciences (NARILIS), University of Namur, Namur, Belgium
| | - Jean-Michel Dogné
- Department of Pharmacy, Namur Thrombosis and Hemostasis Center (NTHC), Namur Research Institute for LIfe Sciences (NARILIS), University of Namur, Namur, Belgium
| | - Robert Gosselin
- Thrombosis and Hemostasis Center, Davis Health System, University of California, Sacramento, California
| | - Julie Laloy
- Department of Pharmacy, Namur Nanosafety Center (NNC),, Namur Research Institute for Life Sciences (NARILIS), University of Namur, Namur, Belgium
| | - François Mullier
- Laboratory Hematology, Namur Thrombosis and Hemostasis Center (NTHC), Namur Research Institute for LIfe Sciences (NARILIS), CHU UCL Namur, Université catholique de Louvain, Namur, Belgium
| | - Jonathan Douxfils
- Department of Pharmacy, Namur Thrombosis and Hemostasis Center (NTHC), Namur Research Institute for LIfe Sciences (NARILIS), University of Namur, Namur, Belgium.,Qualiblood s.a, Namur, Belgium
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42
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Speed V, Green B, Roberts LN, Woolcombe S, Bartoli-Abdou J, Barsam S, Byrne R, Gee E, Czuprynska J, Brown A, Duffy S, Vadher B, Patel R, Scott V, Gazes A, Patel RK, Arya R, Patel JP. Fixed dose rivaroxaban can be used in extremes of bodyweight: A population pharmacokinetic analysis. J Thromb Haemost 2020; 18:2296-2307. [PMID: 32511863 DOI: 10.1111/jth.14948] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 04/28/2020] [Accepted: 05/26/2020] [Indexed: 12/12/2022]
Abstract
BACKGROUND Emerging safety and efficacy data for rivaroxaban suggest traditional therapy and rivaroxaban are comparable in the morbidly obese. However, real-world data that indicate pharmacokinetic (PK) parameters are comparable at the extremes of body size are lacking. The International Society of Thrombosis and Haemostasis Scientific and Standardisation Committee (ISTH SSC) suggests avoiding the use of direct oral anticoagulants (DOACs) in patients weighing >120 kg or with a body mass index >40 kg/m2 and gives no recommendation on the use of DOACs in those <50 kg. OBJECTIVES To generate a population PK model to understand the influence of bodyweight on rivaroxaban exposure from clinical practice data. METHOD Rivaroxaban plasma concentrations and patient characteristics were collated between 2013 and 2018 at King's College Hospital anticoagulation clinic. A population PK model was developed using a nonlinear mixed effects approach and then used to simulate rivaroxaban concentrations at the extremes of bodyweight. RESULTS A robust population PK model derived from 913 patients weighing between 39 kg and 172 kg was developed. The model included data from n = 86 >120 kg, n = 74 BMI >40 kg/m2 , and n = 30 <50 kg. A one-compartment model with between-subject variability on clearance and a proportional error model best described the data. Creatinine clearance calculated by Cockcroft-Gault, with lean bodyweight as the weight descriptor in this equation, was the most significant covariate influencing rivaroxaban exposure. CONCLUSIONS Our work demonstrates rivaroxaban can be used at extremes of bodyweight provided renal function is satisfactory. We recommend that the ISTH SSC revises the current guidance with respect to rivaroxaban at extremes of body size.
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Affiliation(s)
- Victoria Speed
- King's Thrombosis Centre, Department of Haematological Medicine, King's College Hospital NHS Foundation Trust, London, UK
- Institute of Pharmaceutical Science, King's College London, London, UK
| | | | - Lara N Roberts
- King's Thrombosis Centre, Department of Haematological Medicine, King's College Hospital NHS Foundation Trust, London, UK
| | - Sarah Woolcombe
- Department of Oral Surgery, King's College Hospital NHS Foundation Trust, London, UK
| | - John Bartoli-Abdou
- King's Thrombosis Centre, Department of Haematological Medicine, King's College Hospital NHS Foundation Trust, London, UK
| | - Sarah Barsam
- King's Thrombosis Centre, Department of Haematological Medicine, King's College Hospital NHS Foundation Trust, London, UK
| | - Rosalind Byrne
- King's Thrombosis Centre, Department of Haematological Medicine, King's College Hospital NHS Foundation Trust, London, UK
| | - Emma Gee
- King's Thrombosis Centre, Department of Haematological Medicine, King's College Hospital NHS Foundation Trust, London, UK
| | - Julia Czuprynska
- King's Thrombosis Centre, Department of Haematological Medicine, King's College Hospital NHS Foundation Trust, London, UK
| | - Alison Brown
- King's Thrombosis Centre, Department of Haematological Medicine, King's College Hospital NHS Foundation Trust, London, UK
| | - Sinead Duffy
- King's Thrombosis Centre, Department of Haematological Medicine, King's College Hospital NHS Foundation Trust, London, UK
| | - Bipin Vadher
- King's Thrombosis Centre, Department of Haematological Medicine, King's College Hospital NHS Foundation Trust, London, UK
| | - Rachna Patel
- King's Thrombosis Centre, Department of Haematological Medicine, King's College Hospital NHS Foundation Trust, London, UK
| | - Valerie Scott
- King's Thrombosis Centre, Department of Haematological Medicine, King's College Hospital NHS Foundation Trust, London, UK
| | - Anna Gazes
- King's Thrombosis Centre, Department of Haematological Medicine, King's College Hospital NHS Foundation Trust, London, UK
| | - Raj K Patel
- King's Thrombosis Centre, Department of Haematological Medicine, King's College Hospital NHS Foundation Trust, London, UK
| | - Roopen Arya
- King's Thrombosis Centre, Department of Haematological Medicine, King's College Hospital NHS Foundation Trust, London, UK
| | - Jignesh P Patel
- King's Thrombosis Centre, Department of Haematological Medicine, King's College Hospital NHS Foundation Trust, London, UK
- Institute of Pharmaceutical Science, King's College London, London, UK
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43
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De Kesel PM, Devreese KMJ. Direct oral anticoagulant adsorption: Impact on lupus anticoagulant testing-Review of the literature and evaluation on spiked and patient samples. J Thromb Haemost 2020; 18:2003-2017. [PMID: 32400112 DOI: 10.1111/jth.14894] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 05/01/2020] [Accepted: 05/04/2020] [Indexed: 12/17/2022]
Abstract
BACKGROUND Direct oral anticoagulants (DOACs) interfere with lupus anticoagulant (LAC) testing. DOAC-Stop (D-S) represents a preanalytical strategy to cope with this issue. OBJECTIVES To assess D-S's ability to remove DOACs from plasma and overcome DOAC interference in LAC assays and to evaluate D-S's applicability in a representative patient cohort with routine LAC request. METHODS Apixaban (30-933 ng/mL), edoxaban (31-1060 ng/mL), rivaroxaban (35-1020 ng/mL), and dabigatran (20-360 ng/mL) were spiked to normal plasma. Aliquots were treated with D-S or untreated before DOAC and LAC testing. Patient samples containing DOAC (n = 43), vitamin K antagonists (n = 25), heparins (n = 21), or no anticoagulants (n = 63) were tested for LAC before and after D-S. RESULTS Spiking experiments revealed false-positive LAC from low concentrations of DOACs except for apixaban. Following D-S, DOAC levels were below lower limits of quantification, except for apixaban at the highest concentration, and no false-positive LAC was obtained. DOAC levels were below lower limits of quantification after D-S in 39/43 DOAC-containing patient samples. For 23/29 LAC-positive DOAC-containing samples, LAC tests became negative after D-S, whereas 3/6 samples remaining positive were from patients with (high probability for) antiphospholipid syndrome. In the non-DOAC-treated groups, LAC changed from positive to negative in 10 and vice versa in 2 cases. CONCLUSIONS D-S limits DOAC interference in LAC assays. DOAC concentration measurement should be performed in D-S treated samples because incomplete removal may occur. Applying D-S to vitamin K antagonist-containing, heparin-containing, or not-anticoagulated samples may lead to erroneous LAC results. Therefore, D-S should only be used in plasma from DOAC-treated patients.
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Affiliation(s)
- Pieter M De Kesel
- Coagulation Laboratory, Department of Laboratory Medicine, Ghent University Hospital, Ghent, Belgium
| | - Katrien M J Devreese
- Coagulation Laboratory, Department of Laboratory Medicine, Ghent University Hospital, Ghent, Belgium
- Department of Diagnostic Sciences, Ghent University, Ghent, Belgium
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Siddiqui F, Tafur A, Bontekoe E, Iqbal O, Jeske W, Mehrotra S, Hoppensteadt D, Ramacciotti E, Fareed J. Assay-Based Differentiation in the Neutralization Profile of Unfractionated Heparin, Enoxaparin, and Fondaparinux by Andexanet Alfa. Clin Appl Thromb Hemost 2020; 26:1076029619895120. [PMID: 31914798 PMCID: PMC7098205 DOI: 10.1177/1076029619895120] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Andexanet alfa is a recombinant factor Xa decoy protein, designed to reverse bleeding associated with oral anti-Xa agents. Andexanet alfa is also reported to neutralize the effects of heparin-related drugs. This study focused on the neutralization profiles of unfractionated heparin (UFH), enoxaparin, and, a chemically synthetic pentasaccharide, fondaparinux by andexanet alfa. Whole blood clotting studies were carried out using thromboelastography (TEG) and activated clotting time (ACT). The anticoagulant profile of UFH, enoxaparin, and fondaparinux was studied using the activated partial thromboplastin time (aPTT), thrombin time (TT), and amidolytic anti-Xa, and anti-IIa methods. Thrombin generation inhibition was studied using the calibrated automated thrombogram system. Reversal of each of these agents was studied by supplementing andexanet alfa at 100 µg/mL. In the TEG, andexanet alfa produced almost a complete reversal of the anticoagulant effects of UFH and enoxaparin; however, it augmented the effects of fondaparinux. In the ACT, aPTT, and TT, UFH produced strong anticoagulant effects that were almost completely neutralized by andexanet alfa. Enoxaparin produced milder anticoagulant responses that were partially neutralized, whereas fondaparinux did not produce any sizeable effects. In the anti-Xa and anti-IIa assays, UFH exhibited partial neutralization whereas enoxaparin and fondaparinux did not show any neutralization. All agents produced varying degrees of the inhibition of thrombin generation, which were differentially neutralized by andexanet alfa. These results indicate that andexanet alfa is capable of differentially neutralizing anticoagulant and antiprotease effects of UFH and enoxaparin in an assay-dependent manner. However, andexanet alfa is incapable of neutralizing the anti-Xa effects of fondaparinux.
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Affiliation(s)
- Fakiha Siddiqui
- Cardiovascular Research Institute, Loyola University Chicago, Health Sciences Division, Maywood, IL, USA
| | - Alfonso Tafur
- Northshore Cardiovascular Institute, NorthShore University Health Systems, Skokie, IL, USA
| | - Emily Bontekoe
- Cardiovascular Research Institute, Loyola University Chicago, Health Sciences Division, Maywood, IL, USA
| | - Omer Iqbal
- Cardiovascular Research Institute, Loyola University Chicago, Health Sciences Division, Maywood, IL, USA
| | - Walter Jeske
- Cardiovascular Research Institute, Loyola University Chicago, Health Sciences Division, Maywood, IL, USA
| | - Siddharth Mehrotra
- Cardiovascular Research Institute, Loyola University Chicago, Health Sciences Division, Maywood, IL, USA
| | - Debra Hoppensteadt
- Cardiovascular Research Institute, Loyola University Chicago, Health Sciences Division, Maywood, IL, USA
| | - Eduardo Ramacciotti
- Vascular and Endovascular Surgery, Santa Casa School of Medicine, São Paulo, SP, Brazil
| | - Jawed Fareed
- Cardiovascular Research Institute, Loyola University Chicago, Health Sciences Division, Maywood, IL, USA
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Leven C, Hoffmann C, Roche C, Couturaud F, Thereaux J, Lacut K. Impact of bariatric surgery on oral anticoagulants pharmacology, and consequences for clinical practice: a narrative review. Fundam Clin Pharmacol 2020; 35:53-61. [PMID: 32621292 DOI: 10.1111/fcp.12587] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Revised: 06/11/2020] [Accepted: 06/28/2020] [Indexed: 11/27/2022]
Abstract
The prevalence of obesity has been steadily increasing in recent years worldwide. At the same time bariatric surgery, the best therapeutic strategy to date in terms of sustainable weight loss and improvement of associated comorbidities has been also increasing. However, these surgeries, whether primarily restrictive or malabsorptive, raise questions about the pharmacology of oral drugs. Among widely used drugs, anticoagulants are the referent therapy to treat some cardiovascular diseases such as atrial fibrillation and venous thromboembolism. How bariatric surgery may impact pharmacological properties of oral anticoagulants, and more specifically, direct oral anticoagulants (DOACs) are difficult to anticipate. In this review, we describe available data concerning the potential impact of bariatric surgery on the pharmacology of oral anticoagulants. The vitamin K antagonists (VKAs) requirements for the same international normalized ratio target are reduced after bariatric surgery. Limited data available for dabigatran 150 mg twice daily indicate a risk of insufficient efficacy in atrial fibrillation after gastric bypass due to probable impaired absorption. Data for rivaroxaban at the prophylactic dose of 10 mg per day suggest no impact of bariatric surgery from 3 days to 8 months post-surgery. However, no conclusive data are available for other anticoagulants or the use of DOACs at therapeutic doses. To date, DOACs are not recommended in patients who have undergone bariatric surgery, because of limited available data. Pending new studies to confirm the predictable pharmacokinetics and safety of DOACs in this population, especially at therapeutic doses, VKAs remain the first option for chronic anticoagulation.
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Affiliation(s)
- Cyril Leven
- Département de Biochimie et Pharmaco-toxicologie, Hôpital de la Cavale Blanche, CHU Brest, Bd Tanguy Prigent, Brest Cedex, F-29609, France.,Université de Bretagne Occidentale, Brest, EA3878, France
| | - Clément Hoffmann
- Université de Bretagne Occidentale, Brest, EA3878, France.,Département de Médecine Interne, Médecine vasculaire et pneumologie, CHU Brest, Bd Tanguy Prigent, Brest Cedex, F-29609, France
| | - Charles Roche
- Service de chirurgie viscérale, CHU Brest, Bd Tanguy Prigent, Brest Cedex, F-29609, France
| | - Francis Couturaud
- Université de Bretagne Occidentale, Brest, EA3878, France.,Département de Médecine Interne, Médecine vasculaire et pneumologie, CHU Brest, Bd Tanguy Prigent, Brest Cedex, F-29609, France
| | - Jérémie Thereaux
- Université de Bretagne Occidentale, Brest, EA3878, France.,Service de chirurgie viscérale, CHU Brest, Bd Tanguy Prigent, Brest Cedex, F-29609, France
| | - Karine Lacut
- Université de Bretagne Occidentale, Brest, EA3878, France.,Département de Médecine Interne, Médecine vasculaire et pneumologie, CHU Brest, Bd Tanguy Prigent, Brest Cedex, F-29609, France
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Lessire S, Dincq AS, Siriez R, Pochet L, Sennesael AL, Vornicu O, Hardy M, Deceuninck O, Douxfils J, Mullier F. Assessment of low plasma concentrations of apixaban in the periprocedural setting. Int J Lab Hematol 2020; 42:394-402. [PMID: 32297711 DOI: 10.1111/ijlh.13202] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 03/19/2020] [Accepted: 03/22/2020] [Indexed: 12/29/2022]
Abstract
INTRODUCTION Estimation of residual apixaban plasma concentrations may be requested in the management of emergencies. This study aims at assessing the performance of specific anti-Xa assays calibrated with apixaban on real-life samples with low apixaban plasma concentrations (<30 ng/mL) and on-treatment ranges, with and without interference of low-molecular-weight heparin (LMWH). METHODS The performance of the STA® -Liquid Anti-Xa assay (STA® LAX) and the low and normal procedures of the Biophen® Direct Factor Xa Inhibitors (DiXaI) assay was tested on 134 blood samples, collected from patients on apixaban, wherefrom 74 patients received LMWH after apixaban cessation. The results were compared with the liquid chromatography coupled with tandem mass spectrometry (LC-MS/MS) measurements. RESULTS The Biophen® DiXaI, Biophen® DiXaI LOW, and STA® LAX showed very good correlation with LC-MS/MS measurements in patients without LMWH administration (Spearman r .95, .99, and .98, respectively). Their limits of quantitation were defined at 48, 24, and 12 ng/mL, respectively. The Bland-Altman test measured mean bias (SD) at 5.6 (13.1), -2.5 (5.0), and -0.8 (6.1) ng/ml, respectively. The Spearman r of the Biophen® DiXaI decreased to 0.64 in presence of low apixaban concentrations. The Spearman r of the Biophen® DiXaI LOW and STA® LAX decreased to 0.39 and 0.26, respectively, in presence of LMWH. CONCLUSIONS The accuracy of the low methodologies (Biophen® DiXaI LOW and STA® LAX) is slightly improved for low apixaban plasma concentrations, compared with the normal procedure of Biophen® DiXaI. The interference of LMWH on the low methodologies is measurable, however, less important than the previously reported interference of LMWH on rivaroxaban calibrated specific anti-Xa assays.
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Affiliation(s)
- Sarah Lessire
- Université catholique de Louvain, CHU UCL Namur, Namur Thrombosis and Hemostasis Center (NTHC), NAmur Research Institute for LIfe Sciences (NARILIS), Department of Anesthesiology, Yvoir, Belgium
| | - Anne-Sophie Dincq
- Université catholique de Louvain, CHU UCL Namur, Namur Thrombosis and Hemostasis Center (NTHC), NAmur Research Institute for LIfe Sciences (NARILIS), Department of Anesthesiology, Yvoir, Belgium
| | - Romain Siriez
- University of Namur, Namur Thrombosis and Hemostasis Center (NTHC), NAmur Research Institute for LIfe Sciences (NARILIS), Department of Pharmacy, Namur, Belgium
| | - Lionel Pochet
- University of Namur, Namur Thrombosis and Hemostasis Center (NTHC), NAmur Research Institute for LIfe Sciences (NARILIS), Department of Pharmacy, Namur, Belgium
| | - Anne-Laure Sennesael
- Université catholique de Louvain, CHU UCL Namur, Namur Thrombosis and Hemostasis Center (NTHC), NAmur Research Institute for LIfe Sciences (NARILIS), Department of Pharmacy, Yvoir, Belgium
| | - Ovidiu Vornicu
- Université catholique de Louvain, CHU UCL Namur, Namur Thrombosis and Hemostasis Center (NTHC), NAmur Research Institute for LIfe Sciences (NARILIS), Department of Anesthesiology, Yvoir, Belgium
| | - Michael Hardy
- Université catholique de Louvain, CHU UCL Namur, Namur Thrombosis and Hemostasis Center (NTHC), NAmur Research Institute for LIfe Sciences (NARILIS), Department of Anesthesiology, Yvoir, Belgium
| | - Olivier Deceuninck
- Université catholique de Louvain, CHU UCL Namur, Department of Cardiology, Yvoir, Belgium
| | - Jonathan Douxfils
- University of Namur, Namur Thrombosis and Hemostasis Center (NTHC), NAmur Research Institute for LIfe Sciences (NARILIS), Department of Pharmacy, Namur, Belgium.,Qualiblood sa, Namur, Belgium
| | - François Mullier
- Université catholique de Louvain, CHU UCL Namur, Namur Thrombosis and Hemostasis Center (NTHC), NAmur Research Institute for LIfe Sciences (NARILIS), Hematology Laboratory, Yvoir, Belgium
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Potential usefulness of activated charcoal (DOAC remove®) for dRVVT testing in patients receiving Direct Oral AntiCoagulants. Thromb Res 2019; 184:86-91. [DOI: 10.1016/j.thromres.2019.11.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 10/30/2019] [Accepted: 11/02/2019] [Indexed: 12/28/2022]
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