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Buckley MS, Benanti GE, Gilbert B, Meckel J, Dzierba AL, MacLaren R. Correlation between heparin anti-Xa activity and thromboelastography in adult critically ill COVID-19 patients. Pharmacotherapy 2023; 43:795-803. [PMID: 37199139 DOI: 10.1002/phar.2829] [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: 12/15/2022] [Revised: 04/04/2023] [Accepted: 04/05/2023] [Indexed: 05/19/2023]
Abstract
STUDY OBJECTIVE Severe coronavirus disease 2019 (COVID-19) increases the risk of thrombotic complications with unfractionated heparin (UFH) as a commonly used agent in managing venous thromboembolism (VTE). The optimal anticoagulation intensity and monitoring parameters in intensive care unit (ICU) COVID-19 patients remains controversial. The primary study aim was to evaluate the relationship between anti-Xa and thromboelastography (TEG) reaction (R) time in patients with severe COVID-19 receiving therapeutic UFH infusions. DESIGN Single-center, retrospective study conducted over a 15-month period (2020-2021). SETTING Academic medical center (Banner University Medical Center Phoenix). PATIENTS Adult patients with severe COVID-19 administered therapeutic UFH infusions with one or more corresponding TEG, and anti-Xa assessments drawn within ≤2 hours of each other were included. The primary end point was the correlation between anti-Xa and TEG R time. Secondary aims were to describe the correlation between activated partial thromboplastin time (aPTT) and TEG R time, as well as clinical outcomes. Pearson's coefficient was used to evaluate the correlation using a kappa measure of agreement.
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Affiliation(s)
- Mitchell S Buckley
- Department of Pharmacy, Banner University Medical Center Phoenix, Phoenix, Arizona, USA
| | - Grace E Benanti
- Department of Pharmacy, Loyola University Medical Center, Maywood, Illinois, USA
| | - Brian Gilbert
- Department of Pharmacy, Wesley Medical Center, Wichita, Kansas, USA
| | - Jordan Meckel
- Department of Pharmacy, Banner University Medical Center Phoenix, Phoenix, Arizona, USA
| | - Amy L Dzierba
- Department of Pharmacy, New York-Presbyterian Hospital, New York, New York, USA
| | - Robert MacLaren
- Department of Clinical Pharmacy, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado, Aurora, Colorado, USA
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Meshulami N, Green R, Kaushik S. Anti-Xa testing for pediatric and neonatal patients on extracorporeal membrane oxygenation. Perfusion 2023:2676591231185009. [PMID: 37339106 DOI: 10.1177/02676591231185009] [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: 06/22/2023]
Abstract
INTRODUCTION To determine if anti-Xa testing is associated with improved outcomes for patients <19-years-old on ECMO. METHODS We evaluated the clinical benefit of anti-Xa heparin monitoring utilizing the Bleeding and Thrombosis during ECMO (BATE) database of 514 patients <19-years-old. The BATE database includes incidences of bleeding, thrombosis, and mortality. The database also describes anti-coagulation test utilization. We grouped and analyzed patients based on ECMO indication (cardiac, respiratory, or extracorporeal cardiopulmonary resuscitation [E-CPR]) and age (neonatal vs pediatric). We constructed multivariable logistic regression models to analyze the impact of anti-Xa testing on mortality, bleeding, and thrombosis in each group. RESULTS Across the entire population, anti-Xa testing did not have a significant effect on the incidence of mortality (43% with anti-Xa testing vs 49% without), bleeding (68% vs 74%), or thrombosis (37% vs 39%). However, among cardiac indicated patients on ECMO (n = 207), anti-Xa testing was significantly associated with reduced odds ratio (OR) of mortality (adjusted OR 0.527, p = .040) and bleeding (adjusted OR 0.369, p = .021). In addition, among neonatal patients on ECMO (n = 264), anti-Xa testing was associated with a significant reduction in the odds ratio of bleeding (adjusted OR 0.534, p = .046). CONCLUSION Anti-Xa testing is associated with improved outcomes among cardiac indicated and neonatal patients on ECMO. Additional research to find the optimal heparin monitoring regimen is needed to better support these critically ill patients. In the interim, we recommend clinicians consider utilizing anti-Xa assays as part of their heparin monitoring plan for neonatal and cardiac indicated patients on ECMO.
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Affiliation(s)
- Noy Meshulami
- Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Robert Green
- Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Division of Newborn Medicine, Department of Pediatrics, Kravis Children's Hospital at Mount Sinai, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Shubhi Kaushik
- Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Pediatric Critical Care, Department of Pediatrics, Kravis Children's Hospital at Mount Sinai, Icahn School of Medicine at Mount Sinai, New York, NY, USA
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Kataria S, Juneja D, Singh O. Approach to thromboelastography-based transfusion in cirrhosis: An alternative perspective on coagulation disorders. World J Gastroenterol 2023; 29:1460-1474. [PMID: 36998429 PMCID: PMC10044856 DOI: 10.3748/wjg.v29.i9.1460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 01/12/2023] [Accepted: 02/27/2023] [Indexed: 03/07/2023] Open
Abstract
Viscoelastic tests, specifically thromboelastography and rotational thromboelastometry, are increasingly being used in the management of postoperative bleeding in surgical intensive care units (ICUs). However, life-threatening bleeds may complicate the clinical course of many patients admitted to medical ICUs, especially those with underlying liver dysfunction. Patients with cirrhosis have multiple coagulation abnormalities that can lead to bleeding or thrombotic complications. Compared to conventional coagulation tests, a comprehensive depiction of the coagulation process and point-of-care availability are advantages favoring these devices, which may aid physicians in making a rapid diagnosis and instituting early interventions. These tests may help predict bleeding and rationalize the use of blood products in these patients.
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Affiliation(s)
- Sahil Kataria
- Institute of Critical Care Medicine, Max Super Speciality Hospital, New Delhi 110017, India
| | - Deven Juneja
- Institute of Critical Care Medicine, Max Super Speciality Hospital, New Delhi 110017, India
| | - Omender Singh
- Institute of Critical Care Medicine, Max Super Speciality Hospital, New Delhi 110017, India
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Yozova ID, Kent MS, Jandrey KE. Effects of a single subcutaneous dose of enoxaparin on veterinary viscoelastic coagulation monitor variables in healthy cats: Double blind, placebo controlled cross-over trial. Vet Med (Auckl) 2022; 37:133-139. [PMID: 36495054 PMCID: PMC9889604 DOI: 10.1111/jvim.16602] [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: 09/27/2022] [Accepted: 11/23/2022] [Indexed: 12/14/2022]
Abstract
BACKGROUND Cats placed on anticoagulant medication require frequent monitoring. The veterinary viscoelastic coagulation monitor (VCM-Vet) could provide a convenient and cost-effective monitoring, enabling therapeutic decision making. HYPOTHESIS/OBJECTIVES Enoxaparin will lead to changes in VCM-Vet variables and these will correlate with antiXa activity. ANIMALS Twenty-one healthy cats. METHODS Cats were randomized to receive either enoxaparin (1 mg/kg) subcutaneously or 0.9% NaCl (equal volume) and crossed over with a 7-day washout period. The investigators were blinded to group allocation until data analysis. Jugular blood samples were drawn at time 0, and 2, 4, and 8 hours after injection for VCM-Vet analysis within 2 min of collection. Citrated plasma was frozen at -80°C for antiXa activity analysis. A Generalized Linear Model was completed to assess changes between baseline measurements and all time points. RESULTS Significant differences between the enoxaparin-treated cats and controls at for T0h and T2h were found and presented as mean ± SD for clotting time (enoxaparin, 593.4 ± 78.0 s; control, 448.5 ± 50.3 s, P < .001), clot formation time (enoxaparin, 183.1 ± 41.7 s; control, 155.4 ± 28.0 s, P = .001), and alpha angle (enoxaparin, 52.4 ± 6.1°; control, 56.9 ± 3.7 s, P = .003). AntiXa activity was significantly different between T0 and all other timepoints for the enoxaparin group (P < .001). There was no correlation between changes in clotting time and antiXa activity. CONCLUSIONS AND CLINICAL IMPORTANCE The VCM-Vet detects a difference at 2 hours after single-dose enoxaparin administration and it can be useful for anticoagulant therapy monitoring in cats.
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Affiliation(s)
- Ivayla D. Yozova
- Tāwharau Ora‐School of Veterinary ScienceMassey UniversityPalmerston NorthNew Zealand
| | - Michael S. Kent
- Department of Surgical and Radiological SciencesSchool of Veterinary Science, University of California, DavisDavisCaliforniaUSA
| | - Karl E. Jandrey
- Department of Surgical and Radiological SciencesSchool of Veterinary Science, University of California, DavisDavisCaliforniaUSA
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Asher S, Maslow A, Mishra V, Flaherty D, Hayward G, Whiteneck S, Cheves T, Sweeney J. A Pilot Study to Assess the Clinical Onset of IV Heparin in Interventional Cardiology and Cardiac Surgery. J Cardiothorac Vasc Anesth 2022; 36:4281-4288. [PMID: 36100498 DOI: 10.1053/j.jvca.2022.07.030] [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: 04/20/2022] [Revised: 07/27/2022] [Accepted: 07/29/2022] [Indexed: 11/11/2022]
Abstract
OBJECTIVES To determine the onset of heparin anticoagulation, using 2 different measures of activated clotting times (ACT), thromboelastography (TEG; R-time), and anti-Xa levels, after administering low- (100 U/kg) and high- (300 U/kg) dose intravenous (IV) heparin to patients undergoing transcatheter aortic valve replacement (TAVR) and cardiac surgery, respectively. DESIGN Prospective study. SETTING Single academic institution. PARTICIPANTS Patients with normal baseline coagulation presenting for TAVR or cardiac valve surgery. INTERVENTIONS Coagulation studies were performed at baseline, 30 seconds, 90 seconds, and 180 seconds after IV heparin administration. The tests included iSTAT (iACT) and Hemochron ACT (hACT), TEG R-Time, and anti-Xa levels. At the authors' institution, anti-Xa is the preferred measure of heparin anticoagulation when time permits. ACT, a rapid point- of-care test, is used to assess intraprocedural anticoagulation. MEASUREMENTS AND MAIN RESULTS After both low- and high-dose heparin, there are peak increases in ACT and anti-Xa at 30 seconds, followed by a decline at 90 seconds and plateau at 180 seconds. The TEG R-time remained elevated (>80 minutes) throughout. For TAVR cases, all anti-Xa was >1.5 IU/mL, and was associated with an iACT >180 seconds and an hACT >200 seconds. For cardiac valve surgery cases, all anti-Xa was >2.4 and associated with an iACT >420 seconds and and hACT >340 seconds. Compared with hACT, iACTs were significantly lower at all time points after low-dose heparin, but not after high-dose heparin. CONCLUSIONS In this pilot study, heparin anticoagulation was detected as early as 30 seconds after IV administration, based on ACT, anti-Xa levels, and TEG R-time.
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Affiliation(s)
- Shyamal Asher
- Department of Anesthesiology, Rhode Island Hospital, Providence, RI.
| | - Andrew Maslow
- Department of Anesthesiology, Rhode Island Hospital, Providence, RI
| | - Vikas Mishra
- Department of Anesthesiology, Rhode Island Hospital, Providence, RI
| | - Devon Flaherty
- Department of Anesthesiology, Rhode Island Hospital, Providence, RI
| | - Geoffrey Hayward
- Department of Anesthesiology, Rhode Island Hospital, Providence, RI
| | | | - Tracey Cheves
- Department of Hematology, Rhode Island Hospital, Providence, RI
| | - Joseph Sweeney
- Department of Hematology, Rhode Island Hospital, Providence, RI
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Volod O, Wegner J. Viscoelastic Testing in the Management of Adult Patients on Mechanical Circulatory Support Devices with Focus on Extracorporeal Membrane Oxygenation. Semin Thromb Hemost 2022; 48:814-827. [DOI: 10.1055/s-0042-1756303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
AbstractThromboembolic and hemorrhagic complications continue to remain frequent complications that significantly impact the morbidity and mortality of patients implanted with mechanical circulatory support devices (MCSDs). The severe acute respiratory syndrome caused by coronavirus 2 (SARS-CoV-2) has resulted in a number of COVID-19 patients being supported by MCSDs, specifically extracorporeal membrane oxygenation (ECMO), which in turn has created a crucial need for rapid assessment of hemostatic status in these patients to avoid bleeding and thrombotic complications. Currently, conventional plasma-based coagulation assays such as prothrombin time and activated partial thromboplastin time (aPTT) are used to assess hemostasis, and the activated clotting time (ACT) and aPTT are the most common tests used to monitor heparin anticoagulation in patients on ECMO. Unfractionated heparin remains the mainstay anticoagulation therapy for patients on ECMO. Extracorporeal Life Support Organization (ELSO) offers little guidance on the subject but does state that each institution should create its internal anticoagulation protocols. Viscoelastic assays (VEAs) are increasingly recognized by ELSO and ECMO community for their potential to assess hemostatic derangements in patients implanted with MCSDs as well as guidance for appropriate hemostatic therapy. This review focuses on the evidence for the use of viscoelastic assays to assess overall hemostasis and to guide the treatment of adult patients connected to an ECMO circuit. Limitations of the use of conventional assays, ACT, and VEA are also discussed.
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Affiliation(s)
- Oksana Volod
- Department of Pathology and Laboratory Medicine, Cedars Sinai Medical Center, Los Angeles, California
| | - Julie Wegner
- College of Health Professions, South University Online, Savannah, Georgia
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An in vivo rabbit joint injury model to measure trauma-induced coagulopathy and the effect of timing of administration of ketotifen fumarate on posttraumatic joint contracture. OTA Int 2022; 5:e177. [PMID: 35282394 PMCID: PMC8900463 DOI: 10.1097/oi9.0000000000000177] [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] [Accepted: 12/20/2021] [Indexed: 11/30/2022]
Abstract
Objectives: Using a rabbit in vivo joint injury model, the primary objective of the study was to determine if a relationship exists between earlier time to initiation of ketotifen fumarate (KF) treatment and posttraumatic joint contracture (PTJC) reduction. The secondary objective was to determine if a coagulation response could be detected with serial thrombelastography (TEG) analysis following acute trauma in this model. Methods: PTJC of the knee were created in 25 skeletally mature, New Zealand White rabbits. Five groups of 5 animals were studied: a control group that received twice daily subcutaneous injections of normal saline and 4 treatment groups that received twice daily subcutaneous injections of KF (0.5 mg/kg) starting immediately, 1-, 2-, and 4-weeks post-injury. After 8 weeks of immobilization, flexion contractures were measured biomechanically. Serial TEG analysis was performed on the control group animals pre-injury and weekly post-injury. Results: The average joint contracture in the Control Group (43.1° ± 16.2°) was higher than all KF treatment groups; however, the differences were not statistically significant. The average joint contracture was lowest in the 2-week post-injury treatment group (29.4° ± 12.1°), although not statistically significant compared to the other treatment groups. Serial TEG analysis demonstrated significantly higher mean maximal amplitude (maximal amplitude = 68.9 ± 1.7 mm; P < .001), alpha-angle (81.9° ± 0.9°; P < .001), and coagulation index (4.5 ± 0.3; P < .001) 1-week post-injury, which normalized to pre-injury values by 5-weeks post-injury. Conclusions: The use of the mast cell stabilizer KF within 2 weeks of injury demonstrated a nonsignificant trend towards reducing joint contracture in a rabbit in vivo model of PTJC. TEG and the in vivo rabbit joint injury model may be valuable in future preclinical studies of venous thromboembolism prevention and furthering our understanding of the pathophysiology of posttraumatic hypercoagulability.
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Production, characteristics and applications of microbial heparinases. Biochimie 2022; 198:109-140. [DOI: 10.1016/j.biochi.2022.03.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 03/03/2022] [Accepted: 03/28/2022] [Indexed: 12/26/2022]
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Gergi M, Goodwin A, Freeman K, Colovos C, Volod O. Viscoelastic hemostasis assays in septic, critically ill coronavirus disease 2019 patients: a practical guide for clinicians. Blood Coagul Fibrinolysis 2021; 32:225-228. [PMID: 33443923 PMCID: PMC8451615 DOI: 10.1097/mbc.0000000000000999] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Coronavirus disease 2019 (COVID-19)-associated coagulopathy is unusual, poorly defined and is linked with significant hypercoagulability and microthrombotic and macrothrombotic complications leading to worse outcomes and higher mortality. Conventional coagulation assays do not always actively reflect these derangements and might fail to detect this coagulopathy. Viscoelastic hemostatic assays (VHA) provide a possible tool that adds to conventional coagulation assays in identifying this hypercoagulable state. VHA has been mostly used in surgery and trauma but it's still not well defined in sepsis patients with lack of large randomized trials. Few studies described VHA findings in patients with COVID-19 showing significant hypercoagulability and fibrinolysis shutdown. Clinicians taking care of these patients might have little experience interpreting VHA results. By reviewing the available literature on the use of VHA in sepsis, and the current knowledge on COVID-19-associated coagulopathy we provide clinicians with a practical guide on VHA utilization in patients with COVID-19.
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Affiliation(s)
- Mansour Gergi
- Department of Medicine/Division of Hematology Oncology
| | | | | | | | - Oksana Volod
- Department of Pathology, University of Vermont Medical Center, Burlington, Vermont, USA
- Cedars-Sinai Medical Center-David Geffen School of Medicine at UCLA
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Sato K, Katori N, Suga Y, Kiyama S, Uezono S. Coagulation assessment with thromboelastography during abdominal endovascular aneurysm repair in a patient with hemophilia A. JA Clin Rep 2020; 6:7. [PMID: 32026972 PMCID: PMC7000567 DOI: 10.1186/s40981-020-0316-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 01/27/2020] [Indexed: 11/10/2022] Open
Abstract
Background As both APTT and APTT-based coagulation method cannot distinguish heparin effect from intrinsic coagulation factor deficiency, we implemented thromboelastography (TEG) for the coagulation assessment in a patient with hemophilia A undergoing an endovascular surgery with heparinization. Case presentation A 68-year-old male with hemophilia A underwent endovascular aortic repair for abdominal aortic aneurism. TEG results showed recovery of coagulation time (R) in both kaolin assay (CK) and kaolin-heparinase assay (CKH) after factor VIII replacement before heparinization. Against our expectations, R-CKH was slightly prolonged (9.0 min) during heparinization. After the administration of protamine sulfate, R in both assays showed similar values within the normal ranges. Conclusions The combination of CK and CKH assays could be useful to estimate factor VIII (FVIII) level when heparin concentration is low or without heparin; however, caution should be necessary for estimation of FVIII level by TEG under the effect of medium- or high-dose heparin.
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Affiliation(s)
- Kazuki Sato
- Department of Anesthesiology, The Jikei University School of Medicine, 3-25-8 Nishishinbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Nobuyuki Katori
- Department of Anesthesiology, The Jikei University School of Medicine, 3-25-8 Nishishinbashi, Minato-ku, Tokyo, 105-8461, Japan.
| | - Yoshifumi Suga
- Department of Anesthesiology, The Jikei University School of Medicine, 3-25-8 Nishishinbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Shuya Kiyama
- Department of Anesthesiology, The Jikei University School of Medicine, 3-25-8 Nishishinbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Shoichi Uezono
- Department of Anesthesiology, The Jikei University School of Medicine, 3-25-8 Nishishinbashi, Minato-ku, Tokyo, 105-8461, Japan
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