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Larsen EL, Nilius H, Studt JD, Tsakiris DA, Greinacher A, Mendez A, Schmidt A, Wuillemin WA, Gerber B, Vishnu P, Graf L, Kremer Hovinga JA, Goetze JP, Bakchoul T, Nagler M. Accuracy of Diagnosing Heparin-Induced Thrombocytopenia. JAMA Netw Open 2024; 7:e243786. [PMID: 38530310 DOI: 10.1001/jamanetworkopen.2024.3786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/27/2024] Open
Abstract
Importance Heparin-induced thrombocytopenia (HIT) is a life-threatening condition that requires urgent diagnostic clarification. However, knowledge of the diagnostic utility of the recommended diagnostic tests is limited in clinical practice. Objective To evaluate the current diagnostic practice for managing the suspicion of HIT. Design, Setting, and Participants This prospective diagnostic study was conducted from January 2018 to May 2021 among consecutive patients with suspected HIT from 11 study centers in Switzerland, Germany, and the United States. Detailed clinical data and laboratory information were recorded. Platelet factor 4/heparin antibodies were quantified using an automated chemiluminescent immunoassay (CLIA). A washed-platelet heparin-induced platelet activation (HIPA) test was used as a reference standard to define HIT. Exposures Suspicion of HIT. Main Outcomes and Measures The primary outcome was the diagnostic accuracy of the 4Ts score, the CLIA, and the recommended algorithm serially combining both tests. Results Of 1448 patients included between 2018 and 2021, 1318 were available for the current analysis (median [IQR] age, 67 [57-75] years; 849 [64.6%] male). HIPA was positive in 111 patients (prevalence, 8.4%). The most frequent setting was intensive care unit (487 [37.0%]) or cardiovascular surgery (434 [33.0%]). The 4Ts score was low risk in 625 patients (46.8%). By 2 × 2 table, the numbers of patients with false-negative results were 10 (9.0%; 4Ts score), 5 (4.5%; CLIA), and 15 (13.5%; recommended diagnostic algorithm). The numbers of patients with false-positive results were 592 (49.0%; 4Ts score), 73 (6.0%; CLIA), and 50 (4.1%; recommended diagnostic algorithm), respectively. Conclusions and Relevance In this diagnostic study of patients suspected of having HIT, when the recommended diagnostic algorithm was used in clinical practice, antibody testing was required in half the patients. A substantial number of patients were, however, still misclassified, which could lead to delayed diagnosis or overtreatment. Development of improved diagnostic algorithms for HIT diagnosis should be pursued.
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Affiliation(s)
- Emil List Larsen
- Department of Clinical Biochemistry, Copenhagen University Hospital-Rigshospitalet, Copenhagen, Denmark
| | - Henning Nilius
- Department of Clinical Chemistry, Inselspital, Bern University Hospital, Bern, Switzerland
- Graduate School for Health Sciences, University of Bern, Bern, Switzerland
| | - Jan-Dirk Studt
- Division of Medical Oncology and Hematology, University Hospital Zurich, Zurich, Switzerland
| | | | - Andreas Greinacher
- Department of Transfusion Medicine, Institute of Transfusion Medicine, University Medicine Greifswald, Greifswald, Germany
| | - Adriana Mendez
- Department of Laboratory Medicine, Kantonsspital Aarau, Aarau, Switzerland
| | - Adrian Schmidt
- Institute of Laboratory Medicine and Clinic of Medical Oncology and Hematology, Municipal Hospital Zurich Triemli, Zurich, Switzerland
| | - Walter A Wuillemin
- Division of Hematology and Central Hematology Laboratory, Cantonal Hospital of Lucerne and University of Bern, Switzerland
| | - Bernhard Gerber
- Clinic of Hematology, Oncology Institute of Southern Switzerland, Bellinzona, Switzerland
| | - Prakash Vishnu
- Fred Hutchinson Cancer Center, University of Washington, Seattle
| | - Lukas Graf
- Cantonal Hospital of St Gallen, St Gallen, Switzerland
| | - Johanna A Kremer Hovinga
- Department of Hematology and Central Hematology Laboratory, Inselspital, Bern University Hospital, Bern, Switzerland
| | - Jens P Goetze
- Department of Clinical Biochemistry, Copenhagen University Hospital-Rigshospitalet, Copenhagen, Denmark
- Department of Biomedical Sciences, Faculty of Health, Copenhagen University, Copenhagen, Denmark
| | - Tamam Bakchoul
- Centre for Clinical Transfusion Medicine, University Hospital of Tübingen, Tübingen, Germany
| | - Michael Nagler
- Department of Clinical Chemistry, Inselspital, Bern University Hospital, Bern, Switzerland
- University of Bern, Bern, Switzerland
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2
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McMains CJ, Mather TL, Adamson KA, Whitfield R, Doren EL, Hettinger PC, LoGiudice JA. Heparin-induced thrombocytopenia in lower extremity free tissue transfers. Microsurgery 2024; 44:e31075. [PMID: 37339917 DOI: 10.1002/micr.31075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 04/07/2023] [Accepted: 06/02/2023] [Indexed: 06/22/2023]
Abstract
BACKGROUND Heparin-induced thrombocytopenia (HIT) an immunologically mediated reaction to heparin products, can lead to severe thrombocytopenia and potentially life-threatening thrombotic events. In microsurgery, a missed or delayed diagnosis of HIT can cause complications requiring revision operations, flap loss, or limb loss. Surgeons must remain vigilant for this uncommon yet potentially devastating condition and keep abreast of management strategies. METHODS CPT and ICD-10 codes in electronic medical records were used to collect demographic information, clinical courses, and outcomes for patients with a HIT diagnosis who underwent lower extremity free tissue transfer in one institution. RESULTS The authors' institution performed 415 lower extremity free flaps in 411 patients during the 10-year study period. Flap salvage rate was 71% for compromised lower extremity flaps without HIT, and 25% in those with HIT. Four patients (four flaps) met study inclusion criteria during the study period. Three of the four flaps failed and were later debrided; one was rescued after a takeback for anastomosis revision. Two patients successfully underwent a delayed second free flap procedure after recovery, and one was salvaged with a pedicled muscle flap. CONCLUSIONS Surgeons should monitor for HIT by establishing coagulation panel and platelet count baselines and trending these values in the early post-operative period for patients treated with heparin products. The 4T score can be used to screen for HIT with high clinical suspicion. Arterial thrombosis or poor flap perfusion despite sound microvascular technique could suggest HIT. Surgical and medical management including strict heparin avoidance can prevent adverse events for these patients.
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Affiliation(s)
- Conner J McMains
- Department of Plastic Surgery, The Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Tara L Mather
- Department of Plastic Surgery, The Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Karri A Adamson
- Department of Plastic Surgery, The Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Robert Whitfield
- Department of Plastic Surgery, The Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Erin L Doren
- Department of Plastic Surgery, The Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Patrick C Hettinger
- Department of Plastic Surgery, The Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - John A LoGiudice
- Department of Plastic Surgery, The Medical College of Wisconsin, Milwaukee, Wisconsin, USA
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3
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Zhou Y, Jiang H, Wei H, Xiao X, Liu L, Ji X, Zhou C. Cerebral venous thrombosis in patients with autoimmune disease, hematonosis or coronavirus disease 2019: Many familiar faces and some strangers. CNS Neurosci Ther 2023; 29:2760-2774. [PMID: 37365966 PMCID: PMC10493677 DOI: 10.1111/cns.14321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2023] [Revised: 05/24/2023] [Accepted: 06/09/2023] [Indexed: 06/28/2023] Open
Abstract
BACKGROUND Cerebral venous thrombosis, a rare stroke, is characterized by neurological dysfunction caused by bleeding and/or infarction resulting from venous sinus thrombosis, the so-called venous stroke. Current guidelines recommend anticoagulants as first-line therapy in the treatment of venous stroke. With complicated causes of cerebral venous thrombosis, treatment is difficult, especially when combined with autoimmune diseases, blood diseases, and even COVID-19. AIMS This review summarizes the pathophysiological mechanisms, epidemiology, diagnosis, treatment, and clinical prognosis of cerebral venous thrombosis combined with autoimmune diseases, blood diseases, or infectious diseases such as COVID-19. CONCLUSION A systematic understanding of particular risk factors that should not be neglected when unconventional cerebral venous thrombosis occurs and for a scientific understanding of pathophysiological mechanisms, clinical diagnosis, and treatment, thus contributing to knowledge on special types of venous stroke.
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Affiliation(s)
- Yifan Zhou
- Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders, Beijing Institute of Brain Disorders, Beijing Advanced Innovation Center for Big Data‐based Precision MedicineCapital Medical UniversityBeijingChina
| | - Huimin Jiang
- Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders, Beijing Institute of Brain Disorders, Beijing Advanced Innovation Center for Big Data‐based Precision MedicineCapital Medical UniversityBeijingChina
| | - Huimin Wei
- Beijing Advanced Innovation Center for Big Data‐Based Precision Medicine, School of Engineering MedicineBeihang UniversityBeijingChina
| | - Xuechun Xiao
- Beijing Advanced Innovation Center for Big Data‐Based Precision Medicine, School of Engineering MedicineBeihang UniversityBeijingChina
| | - Lu Liu
- Department of Neurology, Xuanwu HospitalCapital Medical UniversityBeijingChina
| | - Xunming Ji
- Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders, Beijing Institute of Brain Disorders, Beijing Advanced Innovation Center for Big Data‐based Precision MedicineCapital Medical UniversityBeijingChina
- Department of Neurosurgery, Xuanwu HospitalCapital Medical UniversityBeijingChina
| | - Chen Zhou
- Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders, Beijing Institute of Brain Disorders, Beijing Advanced Innovation Center for Big Data‐based Precision MedicineCapital Medical UniversityBeijingChina
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4
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Cosmi B, Legnani C, Cini M, Borgese L, Sartori M, Palareti G. Incidence and clinical outcomes of heparin-induced thrombocytopenia: 11 year experience in a tertiary care university hospital. Intern Emerg Med 2023; 18:1971-1980. [PMID: 37568069 DOI: 10.1007/s11739-023-03379-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Accepted: 07/12/2023] [Indexed: 08/13/2023]
Abstract
Heparin-induced thrombocytopenia (HIT) is a rare immuno-mediated adverse reaction with high thrombotic and mortality risk. To evaluate incidence and outcomes of HIT cases diagnosed at a tertiary care hospital from 2007 to 2018. A retrospective study was conducted. Patients with suspected HIT underwent 4Ts score assessment and anti-heparin PF4 IgG antibodies ELISA screening test. If the latter was positive, platelet aggregation test (PAT) was performed. If the latter was positive, any form of heparin was stopped, alternative anticoagulants were started and then overlapped with warfarin. HIT incidence was calculated by dividing HIT cases by the mean yearly number of admitted patients over 11 years. Follow-up was 90 days. Among 2125 screening tests, 96 (4.5%) were positive with confirmatory PAT in 82/90 (3.8% for missing data in 6). Median age was 75; 39 patients were surgical and 51 medical. The median 4Ts score was 5. Unfractionated heparin was employed in 34 (37%). HIT incidence was 0.16/1000/patient/years (95% CI: 0.12-0.23) in surgical and 0.15/1000/patient/years (95%: 0.12-0.20) in medical patients. HIT with thrombosis (HIT-T) was observed in 31 patients (0.05/1000/patient/years 95% CI: 0.04-0.1), with venous thromboses in 25 (80%). HIT without thrombosis was observed in 59 patients (0.1/1000 patient/years; 95% CI: 0.08-0.13, twofold vs HIT-T). All cause mortality was 25.5% (95% CI: 17.6-35.4), major bleeding 7.7% (95% CI:3.2-15.3), and thromboembolic complications 3.3% (95% CI:1.1-9.3). HIT is a rare event with high mortality, despite the use of non heparin anticoagulants.
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Affiliation(s)
- Benilde Cosmi
- Angiology and Blood Coagulation Unit , IRCCS, Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy.
- Angiology and Blood Coagulation Unit, Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy.
| | | | | | - Laura Borgese
- Angiology and Blood Coagulation Unit , IRCCS, Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
- Angiology and Blood Coagulation Unit, Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy
| | - Michelangelo Sartori
- Angiology and Blood Coagulation Unit , IRCCS, Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
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5
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Selvadurai MV, Favaloro EJ, Chen VM. Mechanisms of Thrombosis in Heparin-Induced Thrombocytopenia and Vaccine-Induced Immune Thrombotic Thrombocytopenia. Semin Thromb Hemost 2023. [PMID: 36706782 DOI: 10.1055/s-0043-1761269] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Heparin-induced thrombocytopenia (HIT) and vaccine-induced immune thrombotic thrombocytopenia (VITT) are rare, iatrogenic immune-mediated conditions with high rates of thrombosis-related morbidity and mortality. HIT is a long-recognized reaction to the administration of the common parenterally administered anticoagulant heparin (or its derivatives), while VITT is a new, distinct syndrome occurring in response to adenovirus-based vaccines against coronavirus disease 2019 and potentially other types of vaccines. A feature of both HIT and VITT is paradoxical thrombosis despite a characteristic low platelet count, mediated by the presence of platelet-activating antibodies to platelet factor 4. Several additional factors have also been suggested to contribute to clot formation in HIT and/or VITT, including monocytes, tissue factor, microparticles, endothelium, the formation of neutrophil extracellular traps, complement, procoagulant platelets, and vaccine components. In this review, we discuss the literature to date regarding mechanisms contributing to thrombosis in both HIT and VITT and explore the pathophysiological similarities and differences between the two conditions.
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Affiliation(s)
- Maria V Selvadurai
- The Alfred Hospital, Melbourne, VIC, Australia.,ANZAC Research Institute, University of Sydney, Sydney, NSW, Australia
| | - Emmanuel J Favaloro
- Department of Haematology, Institute of Clinical Pathology and Medical Research (ICPMR), Sydney Centres for Thrombosis and Haemostasis, NSW Health Pathology, Westmead Hospital, Westmead, NSW, Australia.,School of Dentistry and Medical Sciences, Faculty of Science and Health, Charles Sturt University, Wagga Wagga, NSW, Australia.,School of Medical Sciences, Faculty of Medicine and Health, University of Sydney, Westmead Hospital, Westmead, NSW, Australia
| | - Vivien M Chen
- ANZAC Research Institute, University of Sydney, Sydney, NSW, Australia.,Department of Haematology, Concord Repatriation General Hospital and NSW Health Pathology, Sydney, NSW, Australia
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6
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Farasatinasab M, Baloochzehi S, Moghamddam OM, Ansarinejad N, Mohammadi M, Nasiripour S. An Open-Label, Single-Arm, Pilot Intervention Study to Assess the Efficacy and Safety of Apixaban in Heparin-Induced Thrombocytopenia. J Clin Pharmacol 2022; 62:1379-1384. [PMID: 35656855 DOI: 10.1002/jcph.2096] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Accepted: 05/31/2022] [Indexed: 11/05/2022]
Abstract
Heparin-induced thrombocytopenia (HIT) is a serious adverse drug reaction due to its related risk of life- and limb-threatening thrombosis. Apixaban is a direct factor Xa inhibitor that may be intended as an ideal alternative for the management of HIT. In this open-label, single-arm, pilot intervention study, the efficacy and safety of apixaban were evaluated in 30 patients over the age of 18 with clinically suspected HIT (4Ts score 4 points or greater). Patients with mechanical heart valves, chronic kidney disease, hepatic impairment, and active bleeding were excluded. In all patients with inclusion criteria, heparin or enoxaparin was discontinued and apixaban was started. The dose of apixaban for HIT suspected patients were defined based on the reason for anticoagulant therapy. Endpoints included confirmed thrombosis, mortality, and adverse treatment-related events. After Apixaban therapy, platelet counts normalized in all patients, none of the 30 subjects developed new, progressive, or recurrent thrombosis, and only 1/30 patients developed hemorrhagic events. Five patients (16.7%) died, but the reason for death was not linked to thrombosis, hemorrhage, or adverse effects of apixaban. Along with the available emerging data, our results propose that apixaban could be a safe and effective drug for the management of suspected HIT in clinically stable patients. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Maryam Farasatinasab
- Department of Clinical Pharmacy, Firoozgar Clinical Research Development Center (FCRDC), Iran University of Medical Sciences, Tehran, Iran
| | - Saeedeh Baloochzehi
- School of Pharmacy-International Campus, Iran University of Medical Sciences, Tehran, Iran
| | - Omid Moradi Moghamddam
- Department of Critical Care Medicine, Rasool Akram Hospital, Iran University of Medical Sciences, Tehran, Iran
| | - Nafiseh Ansarinejad
- Department of Haematology and Oncology, Hazrat-e Rasool Akram University Hospital, Iran University of Medical Sciences, Tehran, Iran
| | - Mahmonir Mohammadi
- Department of Cardiology, Azad University of Medical Sciences, Tehran, Iran
| | - Somayyeh Nasiripour
- Department of Clinical Pharmacy, Rasool Akram Hospital, Iran University of Medical Sciences, Tehran, Iran
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7
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Aguiar de Sousa D, Romoli M, Sánchez Van Kammen M, Heldner MR, Zini A, Coutinho JM, Arnold M, Ferro JM. Cerebral Venous Thrombosis in Patients With Heparin-Induced Thrombocytopenia a Systematic Review. Stroke 2022; 53:1892-1903. [PMID: 35240862 DOI: 10.1161/strokeaha.121.036824] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
BACKGROUND Cerebral venous thrombosis (CVT) has recently been reported as a common thrombotic manifestation in association with vaccine-induced thrombotic thrombocytopenia, a syndrome that mimics heparin-induced thrombocytopenia (HIT) and occurs after vaccination with adenovirus-based SARS-CoV-2 vaccines. We aimed to systematically review the incidence, clinical features, and prognosis of CVT occurring in patients with HIT. METHODS The study protocol was registered with PROSPERO (CRD42021249652). MEDLINE, EMBASE and Cochrane CENTRAL were searched up to June 1, 2021 for HIT case series including >20 patients, or any report of HIT-related CVT. Demographic, neuroradiological, clinical, and mortality data were retrieved. Meta-analysis of proportions with random-effect modeling was used to derive rate of CVT in HIT and in-hospital mortality. Pooled estimates were compared with those for CVT without HIT and HIT without CVT, to determine differences in mortality. RESULTS From 19073 results, we selected 23 case series of HIT (n=1220) and 27 cases of HIT-related CVT (n=27, 71% female). CVT developed in 1.6% of 1220 patients with HIT (95% CI,1.0%-2.5%, I2=0%). Hemorrhagic brain lesions occurred in 81.8% of cases of HIT-related CVT and other concomitant thrombosis affecting other vascular territory was reported in 47.8% of cases. In-hospital mortality was 33.3%. HIT-related CVT carried a 29% absolute increase in mortality rate compared with historical CVT controls (33.3% versus 4.3%, P<0.001) and a 17.4% excess mortality compared with HIT without CVT (33.3% versus 15.9%, P=0.046). CONCLUSIONS CVT is a rare thrombotic manifestation in patients with HIT. HIT-related CVT has higher rates of intracerebral hemorrhage and a higher mortality risk, when compared with CVT in historical controls. The recently reported high frequency of CVT in patients with vaccine-induced thrombotic thrombocytopenia was not observed in HIT, suggesting that additional pathophysiological mechanisms besides anti-platelet factor-4 antibodies might be involved in vaccine-induced thrombotic thrombocytopenia-related CVT.
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Affiliation(s)
- Diana Aguiar de Sousa
- Department of Neurology, Centro Hospitalar Universitário de Lisboa Norte - Hospital de Santa Maria, Lisbon, Portugal (D.A.d.S., J.M.F.).,Faculdade de Medicina, Universidade de Lisboa, Portugal (D.A.d.S., J.M.F.)
| | - Michele Romoli
- Neurology and Stroke Unit, "Maurizio Bufalini" Hospital, Cesena, Italy (M.R.).,Neurology Clinic, University of Perugia - S. Maria della Misericordia Hospital, Italy (M.R.)
| | - Mayte Sánchez Van Kammen
- Department of Neurology, Amsterdam University Medical Center, the Netherlands (M.S.V.K., J.M.C.)
| | - Mirjam R Heldner
- Department of Neurology, University hospital and University of Bern, Switzerland (M.R.H., M.A.)
| | - Andrea Zini
- IRCCS Istituto delle Scienze Neurologiche di Bologna, Neurologia e Rete Stroke Metropolitana, Ospedale Maggiore, Bologna, Italy (A.Z.)
| | - Jonathan M Coutinho
- Department of Neurology, Amsterdam University Medical Center, the Netherlands (M.S.V.K., J.M.C.)
| | - Marcel Arnold
- Department of Neurology, University hospital and University of Bern, Switzerland (M.R.H., M.A.)
| | - José M Ferro
- Department of Neurology, Centro Hospitalar Universitário de Lisboa Norte - Hospital de Santa Maria, Lisbon, Portugal (D.A.d.S., J.M.F.).,Faculdade de Medicina, Universidade de Lisboa, Portugal (D.A.d.S., J.M.F.)
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8
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Malinauskiene L, Aleksandraviciute L, Kryzauskaite L, Savlan I. Rare complication of nadroparin injections: Skin necrosis and heparin-induced thrombocytopenia syndrome. Clin Case Rep 2022; 10:e05297. [PMID: 35079393 PMCID: PMC8765090 DOI: 10.1002/ccr3.5297] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 12/28/2021] [Accepted: 12/29/2021] [Indexed: 11/08/2022] Open
Abstract
We described a rare case of nadroparin-induced skin necrosis with thrombocytopenia. LMWH therapy is used in thrombosis prophylaxis, it is important to recognize that skin necrosis can be a part of HIT early in its course and change heparin or LMWH to non-heparin anticoagulants such as direct thrombin III inhibitors or anti-Xa anticoagulants.
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Affiliation(s)
- Laura Malinauskiene
- Vilnius UniversityInstitute of Clinical MedicineClinic of Chest Diseases, Immunology and AllergologyVilniusLithuania
- Vilnius University Hospital Santaros KlinikosVilniusLithuania
| | | | | | - Ilona Savlan
- Vilnius University Hospital Santaros KlinikosVilniusLithuania
- Vilnius UniversityInstitute of Clinical MedicineClinic of Gastroenterology, Nephrourology and SurgeryCentre of Hepatology, Gastroenterology and DieteticsVilniusLithuania
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9
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Moghbel MC, Chen Z, Liu CM, Rajan S, Vempaty HT, Wang SL. Thrombotic Risk Associated with Inferior Vena Cava Filter Placement in Patients with Heparin-Induced Thrombocytopenia. J Vasc Interv Radiol 2021; 32:1629-1634. [PMID: 34547476 DOI: 10.1016/j.jvir.2021.08.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 07/23/2021] [Accepted: 08/08/2021] [Indexed: 11/16/2022] Open
Abstract
PURPOSE This study sought to define thromboembolic risk and mortality in patients with heparin-induced thrombocytopenia (HIT) undergoing inferior vena cava filter (IVCF) placement, in light of the American Society of Hematology's 2018 guidelines against routine use of IVCFs in this population. METHODS A total of 26 patients with HIT who received IVCFs were retrospectively reviewed, and the outcomes of this group were compared with those of 4,707 controls with either HIT or IVCFs alone and with reported outcomes in prior studies. RESULTS The patient group demonstrated 6- and 12-month mortality rates of 26.9% and 30.8%, respectively, which did not differ significantly from those of the control groups and were in line with published mortality rates in the literature. The measured thromboembolic risk of 19.2% in the patient group was also within the range of published rates for patients with HIT or IVCF alone. CONCLUSIONS IVCF placement did not significantly increase the risk of thromboembolism or death in patients with HIT and may be a viable option in the subset of these patients who are not candidates for anticoagulation.
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Affiliation(s)
- Mateen C Moghbel
- Department of Radiology, Massachusetts General Hospital, Boston, Massachusetts.
| | - Zeng Chen
- Section of Geriatric Medicine, Stanford University Medical Center, Stanford, California
| | - Chi-Mei Liu
- Department of Graduate Medical Education, Kaiser Permanente Santa Clara Medical Center, Santa Clara, California
| | - Sudhir Rajan
- Department of Pulmonology & Critical Care, Kaiser Permanente Santa Clara Medical Center, Santa Clara, California
| | - Hyma T Vempaty
- Department of Hematology & Oncology, Kaiser Permanente Santa Clara Medical Center, Santa Clara, California
| | - Stephen L Wang
- Department of Radiology, Division of Vascular & Interventional Radiology, Kaiser Permanente Santa Clara Medical Center, Santa Clara, California
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10
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Menon H, Pillai A, Aussenberg-Rodriguez J, Ambrose J, Youssef I, Griffiths EA, Al Ustwani O. Cost reduction associated with heparin-induced thrombocytopenia panel ordering for enoxaparin versus heparin for prophylactic and therapeutic use: A retrospective analysis in a community hospital setting. Avicenna J Med 2021; 8:133-138. [PMID: 30319954 PMCID: PMC6178568 DOI: 10.4103/ajm.ajm_78_18] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Abstract
Background: Most hospitals still use unfractionated heparin (UFH) as the primary agent for venous thromboembolism (VTE) prophylaxis in the hospital setting due to ease of use and insignificant cost. However, the risk of heparin-induced thrombocytopenia (HIT) has led some groups to favor other options for therapeutic and prophylactic anticoagulation. This is particularly relevant in light of recent data demonstrating a lower rate of HIT in patients receiving enoxaparin compared with UFH. This study examines the cost-effectiveness of enoxaparin, compared to UFH for prophylactic and therapeutic usage in hospitals. Methods: We conducted a retrospective chart review of patients who underwent HIT panel testing at the Inspira Health Network, Vineland campus (an approximately 262-bedded community hospital located in southern New Jersey that services a population of approximately 61,050) from the period of April 1, 2015 through December 31, 2016. The starting date represents the time from which enoxaparin became the primary alternative anticoagulant available at this hospital. Records of the total usage and cost of UFH and enoxaparin for the specified time period were collected from the hospital pharmacy database for evaluation, as were records of HIT panels. The information was analyzed to determine the frequency of HIT panel testing orders for patients receiving UFH versus those receiving enoxaparin. Annual cost-savings for the hospital were extrapolated using the comparative incidence of HIT panels and associated costs, including increased length of stay, hematology/oncology consultation, use of an alternative anticoagulant, critical bleeding requiring transfusion, and complications of HIT-associated thrombosis. These variables were multiplied by the incidence rate for each specified drug and usage to determine the daily cost for each drug. Results: The use of enoxaparin did not result in a significant decrease in the ordering of HIT panels in the hospital, with a relative rate ratio of 0.948 (95% confidence interval: 0.336, 2.21). When the data were stratified to examine prophylactic and therapeutic anticoagulation, there was a marked difference in the frequency of HIT testing. The rate ratio of HIT panel orders for patients receiving therapeutic enoxaparin rather than intravenous (IV) UFH was 0.118 (0.006, 0.625). These numbers were used to extrapolate the total daily cost of enoxaparin compared with IV UFH; therapeutic enoxaparin cost $30.66, while IV UFH cost $162.30. IV UFH use was associated with a higher incidence rate of HIT panel orders, and consequently a higher daily cost due to the likelihood of increased length of stay, use of alternative anticoagulation, bleeding requiring transfusion, and request for expert consultation. Conclusion: In this study, the use of enoxaparin was associated with a significant cost-saving over IV UFH when used for therapeutic anticoagulation, but this cost saving was not observed for prophylactic anticoagulation.
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Affiliation(s)
- Harry Menon
- Departments of Medicine and Pharmacy, Inspira Health Network, Vineland, New Jersey, USA
| | - Adip Pillai
- Departments of Medicine and Pharmacy, Inspira Health Network, Vineland, New Jersey, USA
| | | | - John Ambrose
- Departments of Medicine and Pharmacy, Inspira Health Network, Vineland, New Jersey, USA
| | - Irini Youssef
- Department of Medicine, Suny Downstate Medical School, Brooklyn, New York, USA
| | - Elizabeth A Griffiths
- Department of Medicine, Leukemia Section, Roswell Park Cancer Institute, Buffalo, New York, USA
| | - Omar Al Ustwani
- Departments of Medicine and Pharmacy, Inspira Health Network, Vineland, New Jersey, USA
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Chan M, Zhao X, Zheng XL. Low ADAMTS-13 predicts adverse outcomes in hospitalized patients with suspected heparin-induced thrombocytopenia. Res Pract Thromb Haemost 2021; 5:e12581. [PMID: 34553121 PMCID: PMC8444283 DOI: 10.1002/rth2.12581] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 07/13/2021] [Accepted: 07/24/2021] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Heparin-induced thrombocytopenia (HIT) is a life-threatening thrombotic complication after heparin exposure. However, the role of ADAMTS-13 and von Willebrand factor (VWF) in the disease process and outcomes of HIT is not known. OBJECTIVE To determine the potential role of ADAMTS-13 and VWF in hospitalized patients suspected with HIT. METHODS Associations of the HIT tests, ADAMTS-13 activity, and VWF antigen or activity with other clinical parameters and outcomes in the patients suspected with HIT were determined. RESULTS Of 261 patients, 87 (33.3%) were positive and 174 (66.7%) were negative for a HIT antibody determined by an enzyme immunoassay (EIA). Of these 87 EIA+ patients, 31 (35.6%) were also positive but 56 (64.4%) were negative for serotonin-releasing assay (SRA). There was no statistically significant difference among all three groups (i.e., EIA-, EIA+/SRA+, and EIA+/SRA-) as to their demographic features, reasons for admission to the hospital, type of procedures performed, and in-hospital mortality. Compared to those in the healthy controls, plasma ADAMTS-13 activity in patients suspected with HIT was significantly lower but plasma VWF antigen (VWFAg) and activity (VWFAc) in these patients were significantly higher. While there was no statistically significant difference among all three groups regarding plasma levels of ADAMTS-13 activity, VWFAg, and VWFAc, plasma levels of ADAMTS-13 activity <50% or the low ratios of ADAMTS-13 activity to VWFAg (or VWFAc) are highly predictive for a 90-day mortality rate, particularly in the EIA+SRA+ group. CONCLUSIONS These results demonstrate that relative deficiency of plasma ADAMTS-13 activity in hospitalized patients suspected with HIT is common, which may contribute at least in part to the adverse outcomes in this patient population, particularly in those with true HIT.
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Affiliation(s)
- Meng Chan
- Departments of Pathology and Laboratory MedicineThe University of Kansas Medical CenterKansas CityKSUSA
| | - Xinyang Zhao
- Departments of Biochemistry and Molecular GeneticsThe University of Alabama at BirminghamBirminghamALUSA
| | - X. Long Zheng
- Departments of Pathology and Laboratory MedicineThe University of Kansas Medical CenterKansas CityKSUSA
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12
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Jao M, Wenzler E, Kim KS. Comparison of percent adjusted versus predefined incremental argatroban dosing nomograms in patients with heparin induced thrombocytopenia. THROMBOSIS UPDATE 2021. [DOI: 10.1016/j.tru.2021.100060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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13
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Management of heparin-induced thrombocytopenia: systematic reviews and meta-analyses. Blood Adv 2021; 4:5184-5193. [PMID: 33095876 DOI: 10.1182/bloodadvances.2020002963] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 09/22/2020] [Indexed: 01/01/2023] Open
Abstract
Heparin-induced thrombocytopenia (HIT) is a prothrombotic adverse drug reaction occurring in <0.1% to 7% of patients receiving heparin products depending on the patient population and type of heparin. Management of HIT is highly dependent on a sequence of tests for which clinicians may or may not have the results when care decisions need to be made. We conducted systematic reviews of the effects of management strategies in persons with acute HIT, subacute HIT A or B, and remote HIT. We searched Medline, EMBASE, and the Cochrane Database through July 2019 for previously published systematic reviews and primary studies. Two investigators independently screened and extracted data and assessed the certainty of the evidence using the Grading of Recommendations Assessment, Development and Evaluation approach. We found primarily noncomparative studies and case series assessing effects of treatments, which led to low to very low certainty evidence. There may be little to no difference in the effects between nonheparin parenteral anticoagulants and direct oral anticoagulants in acute HIT. The benefits of therapeutic-intensity may be greater than prophylactic-intensity anticoagulation. Using inferior vena cava filters or platelet transfusion may result in greater harm than not using these approaches. Evidence for management in special situations, such as for patients undergoing cardiovascular interventions or renal replacement therapy, was also low to very low certainty. Additional research to evaluate nonheparin anticoagulants is urgently needed, and the development of novel treatments that reduce thrombosis without increasing hemorrhage should be a priority.
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Hvas AM, Favaloro EJ, Hellfritzsch M. Heparin-induced thrombocytopenia: pathophysiology, diagnosis and treatment. Expert Rev Hematol 2021; 14:335-346. [PMID: 33736552 DOI: 10.1080/17474086.2021.1905512] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Introduction: Immune-mediated heparin-induced thrombocytopenia (HIT) is an infrequent complication following heparin exposure but with potentially fatal outcome due to thrombotic complications. Prompt suspension of heparin is necessary if HIT is suspected, followed by initiation of non-heparin anticoagulant therapy.Areas covered: In this review, the pathophysiology and challenges in diagnosing HIT are elucidated. Current and emerging treatment options are discussed with special focus on parenteral thrombin inhibitors (argatroban, bivalirudin), parenteral factor Xa inhibitors (danaparoid, fondaparinux) and direct oral anticoagulants (DOACs [rivaroxaban, apixaban, dabigatran]) including dosing strategies for DOACs. The database PubMed was employed without time boundaries.Expert opinion: Only argatroban holds regulatory approval for HIT treatment in both U.S. and Europe. This treatment is, however, challenged by the need for close monitoring and high costs. Fondaparinux has been increasingly used for off-label treatment and during recent years, evidence for the use of DOACs has emerged. Preliminary results from observational studies hold promise for future use of DOACs in the acute and subacute phase of HIT. However, so far, the use of DOACs in acute HIT should be reserved for clinically stable patients without severe thrombotic complications. Importantly, both fondaparinux and DOAC use is contraindicated in severe renal insufficiency.
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Affiliation(s)
- Anne-Mette Hvas
- Department of Clinical Biochemistry, Aarhus University Hospital and Department of Clinical Medicine, Aarhus University. Address: Palle Juul-Jensens Boulevard 99, Aarhus N, Denmark
| | - Emmanuel J Favaloro
- Department of Haematology, Institute of Clinical Pathology and Medical Research (ICPMR), Sydney Centres for Thrombosis and Haemostasis, NSW Health Pathology, Westmead Hospital, Westmead, Australia
| | - Maja Hellfritzsch
- Department of Cardiology, Herning Regional Hospital, Herning, Denmark
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15
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Colarossi G, Maffulli N, Trivellas A, Schnöring H, Hatam N, Tingart M, Migliorini F. Superior outcomes with Argatroban for heparin-induced thrombocytopenia: a Bayesian network meta-analysis. Int J Clin Pharm 2021; 43:825-838. [PMID: 33774764 PMCID: PMC8352815 DOI: 10.1007/s11096-021-01260-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Accepted: 03/15/2021] [Indexed: 12/20/2022]
Abstract
Background Argatroban, lepirudin, desirudin, bivalirudin, and danaparoid are commonly used to manage heparin-induced thrombocytopenia related complications. However, the most suitable drug for this condition still remains controversial. Aim of the review This Bayesian network meta-analysis study compared the most common anticoagulant drugs used in the management of heparin-induced thrombocytopenia. Method All clinical trials comparing two or more anticoagulant therapies for suspected or confirmed heparin-induced thrombocytopenia were considered for inclusion. Studies concerning the use of heparins or oral anticoagulants were not considered. Data concerning hospitalisation length, thromboembolic, major, and minor haemorrhagic events, and mortality rate were collected. The network analyses were made through the STATA routine for Bayesian hierarchical random-effects model analysis with standardised mean difference (SMD) and log odd ratio (LOR) effect measures. Results Data from a total of 4338 patients were analysed. The overall mean age was 62.31 ± 6.6 years old. Hospitalization length was considerably shorter in favour of the argatroban group (SMD: − 1.70). Argatroban evidenced the lowest rate of major (LOR: − 1.51) and minor (LOR: − 0.57) haemorrhagic events. Argatroban demonstrated the lowest rate of thromboembolic events (LOR: 0.62), and mortality rate (LOR: − 1.16). Conclusion Argatroban performed better overall for selected patients with HIT. Argatroban demonstrated the shortest hospitalization, and lowest rate of haemorrhages, thromboembolisms, and mortality compared to bivalirudin, lepirudin, desirudin, and danaparoid.
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Affiliation(s)
- Giorgia Colarossi
- Department of Cardiac and Thoracic Surgery, University Clinic Aachen, RWTH Aachen University Clinic, Pauwelsstraße 30, Aachen, 52074, Germany
| | - Nicola Maffulli
- Department of Medicine, Surgery and Dentistry, University of Salerno, Via S. Allende, 84081, Baronissi, SA, Italy.,School of Pharmacy and Bioengineering, Keele University School of Medicine, Thornburrow Drive, Stoke on Trent, England.,Barts and the London School of Medicine and Dentistry, Centre for Sports and Exercise Medicine, Mile End Hospital, Queen Mary University of London, 275 Bancroft Road, London, E1 4DG, England
| | - Andromahi Trivellas
- Department of Orthopaedics, David Geffen School of Medicine At UCLA, Los Angeles, CA, USA
| | - Heike Schnöring
- Department of Cardiac and Thoracic Surgery, University Clinic Aachen, RWTH Aachen University Clinic, Pauwelsstraße 30, Aachen, 52074, Germany
| | - Nima Hatam
- Department of Cardiac and Thoracic Surgery, University Clinic Aachen, RWTH Aachen University Clinic, Pauwelsstraße 30, Aachen, 52074, Germany
| | - Markus Tingart
- Department of Orthopaedics and Trauma Surgery, University Clinic Aachen, RWTH Aachen University Clinic, Pauwelsstraße 30, 52074, Aachen, Germany
| | - Filippo Migliorini
- Department of Orthopaedics and Trauma Surgery, University Clinic Aachen, RWTH Aachen University Clinic, Pauwelsstraße 30, 52074, Aachen, Germany.
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16
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Marcucci R, Berteotti M, Gori AM, Giusti B, Rogolino AA, Sticchi E, Liotta AA, Ageno W, De Candia E, Gresele P, Marchetti M, Marietta M, Tripodi A. Heparin induced thrombocytopenia: position paper from the Italian Society on Thrombosis and Haemostasis (SISET). BLOOD TRANSFUSION = TRASFUSIONE DEL SANGUE 2021; 19:14-23. [PMID: 33370230 PMCID: PMC7850929 DOI: 10.2450/2020.0248-20] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 10/14/2020] [Indexed: 12/21/2022]
Abstract
Heparin induced thrombocytopenia (HIT) is a rare immune mediated adverse drug reaction occurring after exposure to heparin. It is a serious and potentially fatal condition, which may be associated with the development of arterial or venous thrombotic events. Although known for many years, HIT is still often misdiagnosed. Pre- test clinical probability, screening for anti-PF4/heparin antibodies and documentation of their platelet activating capacity are the cornerstones of diagnosis. However, both clinical algorithms and test modalities have limited predictive values and limited diffusion so that the diagnosis and management is challenging in the clinical practice. For this reason, there is an unmet need for novel rational non-anticoagulant therapies based on the pathogenesis of HIT.The present paper reports the position of the Italian Society on Haemostasis and Thrombosis (SISET) in order to increase awareness of HIT among clinicians and other health care professionals and to provide information on the most appropriate management.
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Affiliation(s)
- Rossella Marcucci
- Experimental and Clinical Medicine, University of Florence; Atherothrombotic Center, AOU Careggi, Florence, Italy
| | - Martina Berteotti
- Experimental and Clinical Medicine, University of Florence; Atherothrombotic Center, AOU Careggi, Florence, Italy
| | - Anna M. Gori
- Experimental and Clinical Medicine, University of Florence; Atherothrombotic Center, AOU Careggi, Florence, Italy
| | - Betti Giusti
- Experimental and Clinical Medicine, University of Florence; Atherothrombotic Center, AOU Careggi, Florence, Italy
| | - Angela A. Rogolino
- Experimental and Clinical Medicine, University of Florence; Atherothrombotic Center, AOU Careggi, Florence, Italy
| | - Elena Sticchi
- Experimental and Clinical Medicine, University of Florence; Atherothrombotic Center, AOU Careggi, Florence, Italy
| | - Agatina Alessandrello Liotta
- Experimental and Clinical Medicine, University of Florence; Atherothrombotic Center, AOU Careggi, Florence, Italy
| | - Walter Ageno
- Department of Medicine and Surgery, University of Insubria, Varese, Italy
| | - Erica De Candia
- Department of Translational Medicine and Surgery, Catholic University of Rome, Rome, Italy
- Department of Image Diagnostics, Radiotherapy and Haematology, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Paolo Gresele
- Department of Medicine, Section of Internal and Cardiovascular Medicine, University of Perugia, Perugia, Italy
| | - Marina Marchetti
- Department of Immunohematology and Transfusion Medicine, Hospital Papa Giovanni XXIII, Bergamo, Italy
| | - Marco Marietta
- Department of Oncology and Haematology, University Hospital, Modena, Italy
| | - Armando Tripodi
- IRCCS “Ca’ Granda Maggiore” Hospital Foundation, “Angelo Bianchi Bonomi” Haemophilia and Thrombosis Center and “Fondazione Luigi Villa”, Milan, Italy
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17
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Colarossi G, Schnöring H, Trivellas A, Betsch M, Hatam N, Eschweiler J, Tingart M, Migliorini F. Prognostic factors for patients with heparin-induced thrombocytopenia: a systematic review. Int J Clin Pharm 2020; 43:449-460. [PMID: 33044680 DOI: 10.1007/s11096-020-01166-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Accepted: 09/23/2020] [Indexed: 10/23/2022]
Abstract
Background Little is known with regards to the prognostic factors for patients with suspected or diagnosed Heparin-Induced Thromobocytopenia (HIT). The role of patient and therapy characteristics may play a role in predicting the outcome. Aim of the review To investigate the role of patient and therapy characteristics as potential prognostic factors for HIT-related complications (haemorrhagic and thromboembolic events), and mortality. Method The present systematic review was conducted according to the PRISMA statement. In September 2020, the main online databases were accessed: Pubmed, EMBASE, Scopus, Google Scholar. All the clinical trials concerning the management of patients with suspected or confirmed HIT were eligible. Studies evaluating the use of oral anticoagulants (e.g. vitamin K antagonists, Apixaban) were not considered, along with those comparing the use of heparin. For pairwise correlation, the Pearson Product-Moment Correlation Coefficient (r) was used. The final effect was evaluated according to the Cauchy-Schwarz inequality.Results Data from 33 clinical studies (4338 patients) were retrieved. The overall mean age was 62.3 ± 6.6 years old. Patients with HIT-related thromboembolism at the moment of diagnosis were associated with greater rate of haemorrhages (P > 0.0001), thromboembolism (P > 0.0001) and mortality (P = 0.001). Patients with more comorbidities at diagnosis were associated with a greater risk of haemorrhages (P = 0.07), thromboembolism (P = 0.002) and mortality (P = 0.002). Patients with longer duration of the therapy were associated with lower rate of mortality (P = 0.04). ConclusionsPatient comorbidities, presence of HIT-related thromboembolism on admission and shorter anticoagulant therapy were found to be negative prognostic factors. Thrombocythemia on admission, patients age and gender did not influence the overall outcome.
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Affiliation(s)
- Giorgia Colarossi
- Department of Cardiac and Thoracic Surgery, RWTH Aachen University Clinic, Pauwelstr. 31, Aachen, 52074, Germany
| | - Heike Schnöring
- Department of Cardiac and Thoracic Surgery, RWTH Aachen University Clinic, Pauwelstr. 31, Aachen, 52074, Germany
| | - Andromahi Trivellas
- Department of Orthopaedics, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Marcel Betsch
- Women´s College Hospital, University of Toronto Orthopaedic Sports Medicine Program (UTOSM), Toronto, ON, Canada
| | - Nima Hatam
- Department of Cardiac and Thoracic Surgery, RWTH Aachen University Clinic, Pauwelstr. 31, Aachen, 52074, Germany
| | - Jörg Eschweiler
- Department of Orthopaedics Surgery, RWTH Aachen University Clinic, Pauwelstr. 31, Aachen, 52074, Germany
| | - Markus Tingart
- Department of Orthopaedics Surgery, RWTH Aachen University Clinic, Pauwelstr. 31, Aachen, 52074, Germany
| | - Filippo Migliorini
- Department of Orthopaedics Surgery, RWTH Aachen University Clinic, Pauwelstr. 31, Aachen, 52074, Germany.
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18
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Shi C, Yang L, Braun A, Anders HJ. Extracellular DNA-A Danger Signal Triggering Immunothrombosis. Front Immunol 2020; 11:568513. [PMID: 33117353 PMCID: PMC7575749 DOI: 10.3389/fimmu.2020.568513] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 09/09/2020] [Indexed: 12/14/2022] Open
Abstract
Clotting and inflammation are effective danger response patterns positively selected by evolution to limit fatal bleeding and pathogen invasion upon traumatic injuries. As a trade-off, thrombotic, and thromboembolic events complicate severe forms of infectious and non-infectious states of acute and chronic inflammation, i.e., immunothrombosis. Factors linked to thrombosis and inflammation include mediators released by platelet granules, complement, and lipid mediators and certain integrins. Extracellular deoxyribonucleic acid (DNA) was a previously unrecognized cellular component in the blood, which elicits profound proinflammatory and prothrombotic effects. Pathogens trigger the release of extracellular DNA together with other pathogen-associated molecular patterns. Dying cells in the inflamed or infected tissue release extracellular DNA together with other danger associated molecular pattern (DAMPs). Neutrophils release DNA by forming neutrophil extracellular traps (NETs) during infection, trauma or other forms of vascular injury. Fluorescence tissue imaging localized extracellular DNA to sites of injury and to intravascular thrombi. Functional studies using deoxyribonuclease (DNase)-deficient mouse strains or recombinant DNase show that extracellular DNA contributes to the process of immunothrombosis. Here, we review rodent models of immunothrombosis and the evolving evidence for extracellular DNA as a driver of immunothrombosis and discuss challenges and prospects for extracellular DNA as a potential therapeutic target.
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Affiliation(s)
- Chongxu Shi
- Renal Division, Medizinische Klinik und Poliklinik IV, Klinikum der Universität München, Ludwig-Maximilians University Munich, Munich, Germany
| | - Luying Yang
- Renal Division, Medizinische Klinik und Poliklinik IV, Klinikum der Universität München, Ludwig-Maximilians University Munich, Munich, Germany
| | - Attila Braun
- German Center for Lung Research, Walther-Straub-Institute for Pharmacology and Toxicology, Ludwig-Maximilians University Munich, Munich, Germany
| | - Hans-Joachim Anders
- Renal Division, Medizinische Klinik und Poliklinik IV, Klinikum der Universität München, Ludwig-Maximilians University Munich, Munich, Germany
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19
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Gallo T, Curry SC, Raschke RA. Computerised risk scores to guide recognition and diagnosis in patients with possible heparin-induced thrombocytopenia. Br J Haematol 2020; 192:146-150. [PMID: 33280095 DOI: 10.1111/bjh.17086] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 08/11/2020] [Accepted: 08/13/2020] [Indexed: 11/27/2022]
Abstract
The heparin-induced thrombocytopenia computerised risk (HIT-CR) score is designed to aid in the diagnosis of HIT. We sought to evaluate its potential clinical utility. In this retrospective cohort study, we collected HIT-CR scores on all inpatients receiving heparin over a 4-month period and performed chart reviews on the subset who independently underwent clinical diagnostic testing for HIT to identify patients with HIT. In all, 34 342 patients received heparin, 1744 had high-risk HIT-CR scores of ≥3 and 220 had the maximal risk score of 4. Only 6% of high-risk and 10% of maximal-risk patients underwent testing for HIT. Conversely, among all 317 patients who underwent independent testing for HIT, 67% had low-risk HIT-CR scores (<3). Among patients independently tested, the positive predictive value (PPV) was 6·6% [95% confidence interval (CI) 4·9-8·8%] and the negative predictive value (NPV) was 99·5% (95% CI 97·1-99·9%) at a HIT-CR score cut-off of 3, and the PPV was 22·7% (95% CI 12·7-37·4%) and NPV was 99·0% (95% CI 97·6-99·6%) at a cut-off of 4. This study suggests clinicians fail to test most high-risk patients and unnecessarily test many low-risk patients for HIT. A reasonable approach to clinical application of HIT-CR scores would be recommending no testing for patients with a score of <3 and recommend testing for patients with a score of 4.
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Affiliation(s)
- Tyler Gallo
- Division of Clinical Data Analytics and Decision Support, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA.,Department of Pharmacy Practice and Science, University of Arizona College of Pharmacy, Phoenix, AZ, USA
| | - Steven C Curry
- Division of Clinical Data Analytics and Decision Support, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA.,Department of Medical Toxicology, Banner-University Medical Center Phoenix, Phoenix, AZ, USA
| | - Robert A Raschke
- Division of Clinical Data Analytics and Decision Support, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA
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20
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Abstract
Purpose of Review This review will illustrate the importance of heparin-induced thrombocytopenia in the intraoperative and critical care settings. Recent Findings Heparin-induced thrombocytopenia (HIT) occurs more frequently in surgical patients compared with medical patients due to the inflammatory release of platelet factor 4 and perioperative heparin exposure. Recognition of this disease requires a high index of suspicion. Diagnostic tools and therapeutic strategies have been expanded and refined in recent years. Summary HIT is a condition where antibodies against the heparin/platelet factor 4 complex interact with platelet receptors to promote platelet activation, aggregation, and thrombus formation. Our review will focus on intraoperative and postoperative considerations related to HIT to help the clinician better manage this rare but often devastating hypercoagulable disease process.
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Fukushima Y, Takahashi K, Nakahara I. Successful endovascular therapy for cerebral venous sinus thrombosis accompanied by heparin-induced thrombocytopenia. Interv Neuroradiol 2020; 26:341-345. [PMID: 32114865 DOI: 10.1177/1591019919887821] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
INTRODUCTION Heparin-induced thrombocytopenia (HIT) is an immune-mediated complication of heparin exposure. A limited number of studies have reported cerebral venous sinus thrombosis accompanied by heparin-induced thrombocytopenia. Here, we present a case of successful endovascular therapy (EVT) without periprocedural heparinization in this situation. CASE PRESENTATION A 47-year-old woman taking an oral contraceptive was admitted to our hospital with severe headache to be diagnosed as cerebral venous sinus thrombosis. Initially, she got improved by medical treatment with intravenous unfractionated heparin. However, she rapidly developed disturbance of consciousness and right hemiplegia due to cerebral venous sinus thrombosis accompanied by heparin-induced thrombocytopenia on the 14th hospital day. She underwent emergent EVT by immediate conversion of anticoagulation from heparin to argatroban. Despite a large clot burden, sufficient recanalization and anterograde venous drainage were re-established by combined EVT including aspiration, balloon sinoplasty, and local thrombolysis with urokinase infusion. She got improved immediately after the intervention and discharged home without any neurological sequelae after two months. CONCLUSION This unique case of cerebral venous sinus thrombosis worsened by occurrence of heparin-induced thrombocytopenia during the treatment finally resulted in excellent outcome highlights effectiveness of emergent endovascular intervention for critical cerebral venous sinus thrombosis resistant to initial medical treatment and of immediate establishment of effective anticoagulant strategy for both of heparin-induced thrombocytopenia and cerebral venous sinus thrombosis. Neuroendovascular therapy for cerebral venous sinus thrombosis using alternative argatroban to heparin for periprocedural anticoagulation might be safe and feasible.
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Affiliation(s)
- Yoshihisa Fukushima
- Department of Cerebrovascular Medicine, Stroke Center, St. Mary's Hospital, Fukuoka, Japan
| | - Kenji Takahashi
- Department of Neurosurgery, Stroke Center, St. Mary's Hospital, Fukuoka, Japan
| | - Ichiro Nakahara
- Department of Comprehensive Strokology, Fujita Health University School of Medicine, Toyoake, Japan
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Ashby D, Borman N, Burton J, Corbett R, Davenport A, Farrington K, Flowers K, Fotheringham J, Andrea Fox RN, Franklin G, Gardiner C, Martin Gerrish RN, Greenwood S, Hothi D, Khares A, Koufaki P, Levy J, Lindley E, Macdonald J, Mafrici B, Mooney A, Tattersall J, Tyerman K, Villar E, Wilkie M. Renal Association Clinical Practice Guideline on Haemodialysis. BMC Nephrol 2019; 20:379. [PMID: 31623578 PMCID: PMC6798406 DOI: 10.1186/s12882-019-1527-3] [Citation(s) in RCA: 108] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Accepted: 08/21/2019] [Indexed: 12/15/2022] Open
Abstract
This guideline is written primarily for doctors and nurses working in dialysis units and related areas of medicine in the UK, and is an update of a previous version written in 2009. It aims to provide guidance on how to look after patients and how to run dialysis units, and provides standards which units should in general aim to achieve. We would not advise patients to interpret the guideline as a rulebook, but perhaps to answer the question: "what does good quality haemodialysis look like?"The guideline is split into sections: each begins with a few statements which are graded by strength (1 is a firm recommendation, 2 is more like a sensible suggestion), and the type of research available to back up the statement, ranging from A (good quality trials so we are pretty sure this is right) to D (more like the opinion of experts than known for sure). After the statements there is a short summary explaining why we think this, often including a discussion of some of the most helpful research. There is then a list of the most important medical articles so that you can read further if you want to - most of this is freely available online, at least in summary form.A few notes on the individual sections: 1. This section is about how much dialysis a patient should have. The effectiveness of dialysis varies between patients because of differences in body size and age etc., so different people need different amounts, and this section gives guidance on what defines "enough" dialysis and how to make sure each person is getting that. Quite a bit of this section is very technical, for example, the term "eKt/V" is often used: this is a calculation based on blood tests before and after dialysis, which measures the effectiveness of a single dialysis session in a particular patient. 2. This section deals with "non-standard" dialysis, which basically means anything other than 3 times per week. For example, a few people need 4 or more sessions per week to keep healthy, and some people are fine with only 2 sessions per week - this is usually people who are older, or those who have only just started dialysis. Special considerations for children and pregnant patients are also covered here. 3. This section deals with membranes (the type of "filter" used in the dialysis machine) and "HDF" (haemodiafiltration) which is a more complex kind of dialysis which some doctors think is better. Studies are still being done, but at the moment we think it's as good as but not better than regular dialysis. 4. This section deals with fluid removal during dialysis sessions: how to remove enough fluid without causing cramps and low blood pressure. Amongst other recommendations we advise close collaboration with patients over this. 5. This section deals with dialysate, which is the fluid used to "pull" toxins out of the blood (it is sometimes called the "bath"). The level of things like potassium in the dialysate is important, otherwise too much or too little may be removed. There is a section on dialysate buffer (bicarbonate) and also a section on phosphate, which occasionally needs to be added into the dialysate. 6. This section is about anticoagulation (blood thinning) which is needed to stop the circuit from clotting, but sometimes causes side effects. 7. This section is about certain safety aspects of dialysis, not seeking to replace well-established local protocols, but focussing on just a few where we thought some national-level guidance would be useful. 8. This section draws together a few aspects of dialysis which don't easily fit elsewhere, and which impact on how dialysis feels to patients, rather than the medical outcome, though of course these are linked. This is where home haemodialysis and exercise are covered. There is an appendix at the end which covers a few aspects in more detail, especially the mathematical ideas. Several aspects of dialysis are not included in this guideline since they are covered elsewhere, often because they are aspects which affect non-dialysis patients too. This includes: anaemia, calcium and bone health, high blood pressure, nutrition, infection control, vascular access, transplant planning, and when dialysis should be started.
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Affiliation(s)
- Damien Ashby
- Hammersmith Hospital, Imperial College Healthcare NHS Trust, London, England.
| | - Natalie Borman
- Wessex Kidney Centre, Portsmouth NHS Trust, Portsmouth, England
| | - James Burton
- University Hospitals of Leicester NHS Trust, Leicester, England
| | - Richard Corbett
- Hammersmith Hospital, Imperial College Healthcare NHS Trust, London, England
| | | | - Ken Farrington
- Lister Hospital, East & North Hertfordshire NHS Trust, Stevenage, England
| | - Katey Flowers
- Wessex Kidney Centre, Portsmouth NHS Trust, Portsmouth, England
| | | | - R N Andrea Fox
- School of Nursing and Midwifery, University of Sheffield, Sheffield, England
| | - Gail Franklin
- East & North Hertfordshire NHS Trust, Stevenage, England
| | | | | | - Sharlene Greenwood
- Renal and Exercise Rehabilitation, King's College Hospital, London, England
| | | | - Abdul Khares
- Haemodialysis Patient, c/o The Renal Association, Bristol, UK
| | - Pelagia Koufaki
- School of Health Sciences, Queen Margaret University, Edinburgh, Scotland
| | - Jeremy Levy
- Hammersmith Hospital, Imperial College Healthcare NHS Trust, London, England
| | - Elizabeth Lindley
- Department of Renal Medicine, Leeds Teaching Hospitals NHS Trust, Leeds, England
| | - Jamie Macdonald
- School of Sport, Health and Exercise Sciences, Bangor University, Bangor, UK
| | - Bruno Mafrici
- Nottingham University Hospitals NHS Trust, Nottingham, UK
| | | | | | - Kay Tyerman
- Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - Enric Villar
- Lister Hospital, East & North Hertfordshire NHS Trust, Stevenage, England
| | - Martin Wilkie
- Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, England
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Heterogeneity in neutrophil responses to immune complexes. Blood Adv 2019; 3:2778-2789. [PMID: 31554616 DOI: 10.1182/bloodadvances.2019000235] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Accepted: 08/13/2019] [Indexed: 11/20/2022] Open
Abstract
Immune complexes (ICs) can trigger inflammation and thrombosis, in part, by activating neutrophils. Much attention has focused on the serologic characteristics of ICs and Fc receptors associated with cellular activation, but few studies have examined host susceptibility to neutrophil activation by ICs. Here, we use a novel whole blood system to investigate the ability of ICs to cause neutrophil activation and degranulation. Using monoclonal anti-platelet factor 4/heparin (PF4/heparin), anti-protamine/heparin antibodies, patient-derived anti-PF4/heparin antibodies, and heat-aggregated immunoglobulin G as model ICs, we demonstrate that heparin-containing ICs cause robust, heparin-dependent neutrophil activation and degranulation which is mediated by both FcγRIIa and complement. Longitudinal testing over a 1-year period shows that an individual's neutrophil response to ICs represents a fixed phenotype resulting in high, intermediate, or low reactivity. Examination of individuals at the extremes of reactivity (high vs low) shows that phenotypic variation resides in the cellular compartment and is correlated with host white blood cell count and absolute neutrophil count, but not age, sex, race, polymorphisms in neutrophil Fcγ receptors, or CR1, CR3, and Fcγ receptor expression on neutrophils. Together, these studies demonstrate that susceptibility to neutrophil activation by ICs is intrinsic to the host and is likely genetic in origin. These findings may be relevant to the heterogeneous clinical outcomes seen in patients with heparin-induced thrombocytopenia and other IC-mediated disorders and could potentially identify patients at high risk for thrombotic and inflammatory complications.
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Refaai MA, Conley G, Ortel TL, Francis JL. Evaluation of a rapid and automated heparin-induced thrombocytopenia immunoassay. Int J Lab Hematol 2019; 41:478-484. [PMID: 30986338 PMCID: PMC6850659 DOI: 10.1111/ijlh.13029] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 03/08/2019] [Accepted: 03/15/2019] [Indexed: 01/27/2023]
Abstract
Introduction Heparin‐induced thrombocytopenia (HIT) is a potentially life‐threatening adverse reaction of heparin. Laboratory evaluation of HIT is often not available within a reasonable time. We evaluated the HemosIL® HIT‐Ab(PF4‐H) (Instrumentation Laboratory), a rapid, on‐demand, fully automated, latex immunoturbidimetric assay (LIA). Materials and methods Following determination of the LIA's reference interval and cutoff values, a multicenter study was conducted between March 2013 and June 2015. Plasma samples of HIT‐suspected patients (n = 632) were collected and evaluated by LIA on the ACL TOP® Family systems (Instrumentation Laboratory), enzyme‐linked immunosorbent assays (EIA), and serotonin release assay (SRA). Patient characteristics, medical conditions, comorbidities, laboratory results, and medications were collected via medical chart review. The pretest clinical probability of HIT was also calculated for each patient. Results Based on the 95% reference interval for healthy donors and HIT‐negative patients, a LIA value ≥1.0 U/mL was interpreted positive. The overall agreement of LIA versus EIA and SRA results were 90% (95% CI 88%‐92%) and 79% (95% CI 75%‐82%), respectively. The negative predictive value for LIA and EIA was comparable (87%) with SRA. The positive and negative percent agreements with the clinical probability were 89% (95% CI 69%‐97%) and 86% (95% CI 83%‐89%), respectively, with a negative predictive value of 99.6% (95% CI 98%‐100%). Discussion Overall, the LIA results were comparable to those of EIA and SRA. This fully automated assay with a remarkable short analytical turnaround time of <20 minutes can be performed on‐demand, which would greatly facilitate more prompt management of HIT.
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Affiliation(s)
- Majed A Refaai
- Department of Pathology and Laboratory Medicine, University of Rochester Medical Center, Rochester, New York
| | - Grace Conley
- Department of Pathology and Laboratory Medicine, University of Rochester Medical Center, Rochester, New York
| | - Thomas L Ortel
- Hemostasis and Thrombosis Center, Duke University Medical Center, Durham, North Carolina
| | - John L Francis
- Florida Hospital Center for Thrombosis Research, Winter Park, Florida
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Pabst D, Boone JB, Soleimani B, Brehm CE. Heparin-induced thrombocytopenia in patients on extracorporeal membrane oxygenation and the role of a heparin-bonded circuit. Perfusion 2019; 34:584-589. [DOI: 10.1177/0267659119842056] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Background: In patients supported with extracorporeal membrane oxygenation, and who develop heparin-induced thrombocytopenia, there is no clear evidence to support changing to a non-heparin-coated extracorporeal membrane oxygenation circuit. Our goal was to evaluate clinical outcomes of patients who were continued on heparin-bonded circuits despite diagnosed heparin-induced thrombocytopenia. Methods: We completed a single-center retrospective study of all patients who underwent extracorporeal membrane oxygenation support from July 2008 to July 2017 and were tested heparin-induced thrombocytopenia positive while on extracorporeal membrane oxygenation support. After diagnosis of heparin-induced thrombocytopenia, mean platelet count (k/µL) was measured on consecutive days for 14 days. Results: Out of 455 patients, 14 (3.1%) had a diagnosis of heparin-induced thrombocytopenia by serotonin release assay and systemic heparin treatment was discontinued in every case. In total, 11 of the heparin-induced thrombocytopenia patients (78.6%) survived to discharge. The overall survival of all 455 extracorporeal membrane oxygenation patients was 54.1%. Platelets counts after discontinuation of systemic heparin in the heparin-induced thrombocytopenia patients increased from a mean of 59.8 k/µL at time of heparin-induced thrombocytopenia diagnosis to a mean of 280.2 k/µL at 14 days after discontinuation of heparin despite continuation of the heparin-bonded circuit. Platelet count increased in heparin-induced thrombocytopenia patients on extracorporeal membrane oxygenation support after discontinuation of systemic heparin even if maintained on the heparin-bonded circuit. Conclusion: Discontinuation of systemic heparin but continuation of heparin-coated extracorporeal membrane oxygenation circuits appeared to be an appropriate response for our extracorporeal membrane oxygenation–supported patients who developed heparin-induced thrombocytopenia. Survival in this group was not significantly different to those patients on extracorporeal membrane oxygenation without heparin-induced thrombocytopenia. Larger studies should evaluate the safety of heparin-bonded extracorporeal membrane oxygenation systems in heparin-induced thrombocytopenia patients.
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Affiliation(s)
- Dirk Pabst
- Heart and Vascular Institute, Penn State Health Milton S. Hershey Medical Center, Hershey, PA, USA
- Center for Emergency Medicine, University Hospital Essen, Essen, Germany
| | | | - Behzad Soleimani
- Heart and Vascular Institute, Penn State Health Milton S. Hershey Medical Center, Hershey, PA, USA
| | - Christoph E Brehm
- Heart and Vascular Institute, Penn State Health Milton S. Hershey Medical Center, Hershey, PA, USA
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Gallo T, Curry SC, Padilla-Jones A, Heise CW, Ramos KS, Woosley RL, Raschke RA. A computerized scoring system to improve assessment of heparin-induced thrombocytopenia risk. J Thromb Haemost 2019; 17:383-388. [PMID: 30552743 DOI: 10.1111/jth.14359] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Indexed: 11/27/2022]
Abstract
Essentials Current risk scores for heparin-induced thrombocytopenia (HIT) are not computer-friendly. We compared a new computerized risk score with the 4Ts score in a large healthcare system. The computerized risk score agrees with the 4Ts score 85% of the time. The new score could potentially improve HIT diagnosis via incorporation into decision support. SUMMARY: Background (HIT) is an immune-mediated adverse drug event associated with life-threatening thrombotic complications. The 4Ts score is widely used to estimate the risk for HIT and guide diagnostic testing, but it is not easily amenable to computerized clinical decision support (CDS) implementation. Objectives Our main objective was to develop an HIT computerized risk (HIT-CR) scoring system that provides platelet count surveillance for timing and degree of thrombocytopenia to identify those for whom diagnostic testing should be considered. Our secondary objective was to evaluate clinical management and subsequent outcomes in those identified as being at risk for HIT. Methods We retrospectively analyzed data from a stratified sample of 150 inpatients treated with heparin to compare the performance of the HIT-CR scoring system with that of a clinically calculated 4Ts score. We took a 4Ts score of ≥ 4 as the gold standard to determine whether HIT diagnostic testing should be performed. Results The best cutoff point of the HIT-CR score was a score of 3, which yielded 85% raw agreement with the 4Ts score and a kappa of 0.69 (95% confidence interval 0.57-0.81). Ninety per cent of patients with 4Ts score of ≥ 4 failed to undergo conventionally recommended diagnostic testing; 38% of these experienced persistent, unexplained thrombocytopenia, and 4% suffered life-threatening thrombotic complications suggestive of undiagnosed HIT. Conclusion The HIT-CR scoring system is practical for computerized CDS, agrees well with the 4Ts score, and should be prospectively evaluated for its ability to identify patients who should be tested for HIT.
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Affiliation(s)
- T Gallo
- Division of Clinical Data Analytics and Decision Support, University of Arizona College of Medicine - Phoenix, Phoenix, AZ, USA
- Department of Pharmacy Practice and Science, University of Arizona College of Pharmacy, Phoenix, AZ, USA
| | - S C Curry
- Division of Clinical Data Analytics and Decision Support, University of Arizona College of Medicine - Phoenix, Phoenix, AZ, USA
- Department of Medical Toxicology, Banner - University Medical Center Phoenix, Phoenix, AZ, USA
| | - A Padilla-Jones
- Banner Research Institute, Banner - University Medical Center Phoenix, Phoenix, AZ, USA
| | - C W Heise
- Division of Clinical Data Analytics and Decision Support, University of Arizona College of Medicine - Phoenix, Phoenix, AZ, USA
- Department of Medical Toxicology, Banner - University Medical Center Phoenix, Phoenix, AZ, USA
| | - K S Ramos
- Division of Clinical Data Analytics and Decision Support, University of Arizona College of Medicine - Phoenix, Phoenix, AZ, USA
| | - R L Woosley
- Division of Clinical Data Analytics and Decision Support, University of Arizona College of Medicine - Phoenix, Phoenix, AZ, USA
| | - R A Raschke
- Division of Clinical Data Analytics and Decision Support, University of Arizona College of Medicine - Phoenix, Phoenix, AZ, USA
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Manikappa S, Benfield K, Gan TE, Butler J, Malan E, Tran HAM, Tucker A. Heparin-induced Thrombocytopenia and the Use of r-Hirudin during Cardiopulmonary Bypass. Anaesth Intensive Care 2019; 33:388-92. [PMID: 15973924 DOI: 10.1177/0310057x0503300316] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
We report the successful use of r-hirudin (lepirudin) for cardiopulmonary bypass in a 67-year-old man who developed heparin-induced thrombocytopenia type II during heparin treatment of an extensive deep venous thrombosis. Lepirudin was monitored by the modified ecarin clotting time in a “mobile laboratory” set up next to the cardiac theatre, aiming for lepirudin levels of 3.5 to 4.5 μg/ml during bypass.
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Affiliation(s)
- S Manikappa
- Department of Anaesthesia, Monash Medical Centre, Clayton, Victoria
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Cuker A, Arepally GM, Chong BH, Cines DB, Greinacher A, Gruel Y, Linkins LA, Rodner SB, Selleng S, Warkentin TE, Wex A, Mustafa RA, Morgan RL, Santesso N. American Society of Hematology 2018 guidelines for management of venous thromboembolism: heparin-induced thrombocytopenia. Blood Adv 2018; 2:3360-3392. [PMID: 30482768 PMCID: PMC6258919 DOI: 10.1182/bloodadvances.2018024489] [Citation(s) in RCA: 373] [Impact Index Per Article: 62.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Accepted: 09/14/2018] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND Heparin-induced thrombocytopenia (HIT) is an adverse drug reaction mediated by platelet-activating antibodies that target complexes of platelet factor 4 and heparin. Patients are at markedly increased risk of thromboembolism. OBJECTIVE These evidence-based guidelines of the American Society of Hematology (ASH) are intended to support patients, clinicians, and other health care professionals in their decisions about diagnosis and management of HIT. METHODS ASH formed a multidisciplinary guideline panel balanced to minimize potential bias from conflicts of interest. The McMaster University GRADE Centre supported the guideline development process, including updating or performing systematic evidence reviews. The panel prioritized clinical questions and outcomes according to their importance for clinicians and patients. The Grading of Recommendations Assessment, Development and Evaluation (GRADE) approach was used to assess evidence and make recommendations, which were subject to public comment. RESULTS The panel agreed on 33 recommendations. The recommendations address screening of asymptomatic patients for HIT, diagnosis and initial management of patients with suspected HIT, treatment of acute HIT, and special situations in patients with acute HIT or a history of HIT, including cardiovascular surgery, percutaneous cardiovascular intervention, renal replacement therapy, and venous thromboembolism prophylaxis. CONCLUSIONS Strong recommendations include use of the 4Ts score rather than a gestalt approach for estimating the pretest probability of HIT and avoidance of HIT laboratory testing and empiric treatment of HIT in patients with a low-probability 4Ts score. Conditional recommendations include the choice among non-heparin anticoagulants (argatroban, bivalirudin, danaparoid, fondaparinux, direct oral anticoagulants) for treatment of acute HIT.
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Affiliation(s)
- Adam Cuker
- Department of Medicine and
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | | | - Beng H Chong
- Department of Haematology, University of New South Wales, Sydney, NSW, Australia
| | - Douglas B Cines
- Department of Medicine and
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Andreas Greinacher
- Institute of Immunology and Transfusion Medicine, University of Greifswald, Greifswald, Germany
| | - Yves Gruel
- Department of Haematology-Haemostasis, Trousseau Hospital, Tours, France
| | - Lori A Linkins
- Department of Medicine, McMaster University, Hamilton, ON, Canada
| | | | - Sixten Selleng
- Department of Anaesthesiology, University of Greifswald, Greifswald, Germany
| | - Theodore E Warkentin
- Department of Medicine, McMaster University, Hamilton, ON, Canada
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada
| | | | - Reem A Mustafa
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, ON, Canada; and
- Department of Medicine, University of Missouri-Kansas City, Kansas City, MO
| | - Rebecca L Morgan
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, ON, Canada; and
| | - Nancy Santesso
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, ON, Canada; and
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Gollomp K, Kim M, Johnston I, Hayes V, Welsh J, Arepally GM, Kahn M, Lambert MP, Cuker A, Cines DB, Rauova L, Kowalska MA, Poncz M. Neutrophil accumulation and NET release contribute to thrombosis in HIT. JCI Insight 2018; 3:99445. [PMID: 30232279 PMCID: PMC6237233 DOI: 10.1172/jci.insight.99445] [Citation(s) in RCA: 105] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Accepted: 08/14/2018] [Indexed: 12/25/2022] Open
Abstract
Heparin-induced thrombocytopenia (HIT) is an immune-mediated thrombocytopenic disorder associated with a severe prothrombotic state. We investigated whether neutrophils and neutrophil extracellular traps (NETs) contribute to the development of thrombosis in HIT. Using an endothelialized microfluidic system and a murine passive immunization model, we show that HIT induction leads to increased neutrophil adherence to venous endothelium. In HIT mice, endothelial adherence is enhanced immediately downstream of nascent venous thrombi, after which neutrophils undergo retrograde migration via a CXCR2-dependent mechanism to accumulate into the thrombi. Using a microfluidic system, we found that PF4 binds to NETs, leading them to become compact and DNase resistant. PF4-NET complexes selectively bind HIT antibodies, which further protect them from nuclease digestion. In HIT mice, inhibition of NET formation through Padi4 gene disruption or DNase treatment limited venous thrombus size. PAD4 inactivation did affect arterial thrombi or severity of thrombocytopenia in HIT. Thus, neutrophil activation contributes to the development of venous thrombosis in HIT by enhancing neutrophil-endothelial adhesion and neutrophil clot infiltration, where incorporated PF4-NET-HIT antibody complexes lead to thrombosis propagation. Inhibition of neutrophil endothelial adhesion, prevention of neutrophil chemokine-dependent recruitment of neutrophils to thrombi, or suppression of NET release should be explored as strategies to prevent venous thrombosis in HIT.
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Affiliation(s)
- Kandace Gollomp
- Division of Hematology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.,Department of Pediatrics
| | - Minna Kim
- Division of Hematology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | | | | | - John Welsh
- Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Gowthami M Arepally
- Deparment of Medicine, Duke University School of Medicine, Durham, North Carolina, USA
| | - Mark Kahn
- Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Michele P Lambert
- Division of Hematology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.,Department of Pediatrics
| | - Adam Cuker
- Department of Pathology, and.,Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Douglas B Cines
- Department of Pathology, and.,Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Lubica Rauova
- Division of Hematology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.,Department of Pediatrics
| | - M Anna Kowalska
- Division of Hematology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.,Institute of Medical Biology, Polish Academy of Science, Lodz, Poland
| | - Mortimer Poncz
- Division of Hematology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.,Department of Pediatrics
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Fathi M. Heparin-induced thrombocytopenia (HIT): Identification and treatment pathways. Glob Cardiol Sci Pract 2018; 2018:15. [PMID: 30083545 PMCID: PMC6062760 DOI: 10.21542/gcsp.2018.15] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Heparin-induced thrombocytopenia (HIT) is a major health problem, especially in cardiac surgery theaters, cardiac catheterization labs, and intensive care units. Some patients with HIT develop serious thrombotic complications like limb ischemia and gangrene, while others may not develop such complications and have only mild thrombocytopenia. Current laboratory diagnostic tools incur significant time delays before confirming HIT, therefore upon clinical suspicion, treatment of HIT should start immediately while awaiting laboratory results. This is a review of the types, phases, pathophysiology, clinical presentation and diagnosis of HIT, and its current management strategies.
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Wang Y, Ye ZK, Li JF, Cui XL, Liu LH. Heparin-induced thrombocytopenia: A critical appraisal of clinical practice guidelines with the AGREE II instrument. Thromb Res 2018; 166:10-18. [PMID: 29649767 DOI: 10.1016/j.thromres.2018.03.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 03/14/2018] [Accepted: 03/24/2018] [Indexed: 01/06/2023]
Abstract
BACKGROUND Despite the availability of clinical practice guidelines (CPGs), the risk of death or thromboembolic complication associated with heparin-induced thrombocytopenia (HIT) remains high. Our aim was to systematically review the quality of CPGs for HIT and summarize the recommendations. METHODS CPGs for HIT were systematically searched on PubMed, Embase, guidelines' websites, and Google up to August 6, 2017. Independently, three appraisers assessed the quality of CPGs using the Appraisal of Guidelines for Research & Evaluation II (AGREE II) instrument and extracted the data. Recommendations were summarized, and a comparative study was conducted to analyze the consistency among guidelines. RESULTS A total of 11 CPGs were evaluated. The quality assessed by AGREE II varied widely, not only between domains within guidelines, but also between guidelines across domains. The domain of scope and purpose and clarity of presentation obtained the highest median scores, while the domain of rigor of development and editorial independence obtained the lowest median scores. The ACCP guideline and BSH guideline were recommended for use in dealing with HIT, achieving a score of at least 50% in all six AGREE II domains. Recommendations across guidelines were inconsistent, especially in the choice of non-heparin anticoagulant for HIT. CONCLUSIONS Future HIT guidelines should place more emphasis on methodological quality and improve efforts to include cost and local availability of drugs when providing recommendations.
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Affiliation(s)
- Ying Wang
- Department of Pharmacy, Beijing Chao-Yang Hospital, Capital Medical University, China
| | - Zhi-Kang Ye
- Department of Pharmacy, Beijing Chao-Yang Hospital, Capital Medical University, China
| | - Ji-Feng Li
- Department of Respiratory and Critical Care Medicine, Beijing Chao-Yang Hospital, Capital Medical University, China
| | - Xiang-Li Cui
- Department of Pharmacy, Beijing Chao-Yang Hospital, Capital Medical University, China.
| | - Li-Hong Liu
- Department of Pharmacy, Beijing Chao-Yang Hospital, Capital Medical University, China.
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Thomas HP, Kassner U, Schliesser C, Steinhagen-Thiessen E. DALI LDL-Apheresis: Anticoagulation with R-Hirudin in a Patient with Heparin-Induced Thrombocytopenia (HIT II). Int J Artif Organs 2018. [DOI: 10.1177/039139880002300907] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A 50-year old male patient with familial hypercholesterolemia and hyperlipoproteinemia (a), who underwent low density lipoprotein-apheresis treatment developed heparin-induced thrombocytopenia type II (HIT II). Because heparin is contraindicated in patients with HIT, an alternative LDL-apheresis system and modified anticoagulation regimen was necessary. Treatment was changed to a new system called DALI (direct adsorption of lipids). After confirmation of the diagnosis HIT II, DALI LDL-apheresis was carried out with recombinant-hirudin (lepirudin) and citrate in order to prevent hypercoagulability. Efficient LDL-apheresis therapy with minimum therapeutic blood levels of lepirudin (1.4 mg/dl) was achieved with an initial intravenous bolus of 0.114 mg/kg of lepirudin followed by continuous lepirudin infusion of 0.350 mg/h. Thrombin-antithrombin III complex production was well controlled and other hemostatic markers showed no abnormalities. LDL-cholesterol and lipoprotein(a) concentrations were effectively reduced. R-hirudin offers a novel anticoagulation strategy and is, at present, the only alternative for patients with HIT II requiring LDL-apheresis on a regular basis.
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Affiliation(s)
- H.-P. Thomas
- Charité Medical Faculty of Humboldt University of Berlin, Virchow -Clinic, Medizinische Poliklinik, LDL-Apherese, Berlin - Germany
| | - U. Kassner
- Charité Medical Faculty of Humboldt University of Berlin, Virchow -Clinic, Medizinische Poliklinik, LDL-Apherese, Berlin - Germany
| | - C. Schliesser
- Charité Medical Faculty of Humboldt University of Berlin, Virchow -Clinic, Medizinische Poliklinik, LDL-Apherese, Berlin - Germany
| | - E. Steinhagen-Thiessen
- Charité Medical Faculty of Humboldt University of Berlin, Virchow -Clinic, Medizinische Poliklinik, LDL-Apherese, Berlin - Germany
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Shatzel JJ, Crapster-Pregont M, Deloughery TG. Non-vitamin K antagonist oral anticoagulants for heparin-induced thrombocytopenia. A systematic review of 54 reported cases. Thromb Haemost 2017; 116:397-400. [DOI: 10.1160/th16-02-0101] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2016] [Accepted: 03/31/2016] [Indexed: 11/05/2022]
Abstract
Supplementary Material to this article is available at www.thrombosis-online.com.
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Chaudhry R, Wegner R, Zaki JF, Pednekar G, Tse A, Kukreja N, Grewal N, Williams GW. Incidence and Outcomes of Heparin-Induced Thrombocytopenia in Patients Undergoing Vascular Surgery. J Cardiothorac Vasc Anesth 2017; 31:1751-1757. [DOI: 10.1053/j.jvca.2017.05.024] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Indexed: 11/11/2022]
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Menk M, Briem P, Weiss B, Gassner M, Schwaiberger D, Goldmann A, Pille C, Weber-Carstens S. Efficacy and safety of argatroban in patients with acute respiratory distress syndrome and extracorporeal lung support. Ann Intensive Care 2017; 7:82. [PMID: 28776204 PMCID: PMC5543012 DOI: 10.1186/s13613-017-0302-5] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 07/20/2017] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Extracorporeal membrane oxygenation (ECMO) or pumpless extracorporeal lung assist (pECLA) requires effective anticoagulation. Knowledge on the use of argatroban in patients with acute respiratory distress syndrome (ARDS) undergoing ECMO or pECLA is limited. Therefore, this study assessed the feasibility, efficacy and safety of argatroban in critically ill ARDS patients undergoing extracorporeal lung support. METHODS This retrospective analysis included ARDS patients on extracorporeal lung support who received argatroban between 2007 and 2014 in a single ARDS referral center. As controls, patients who received heparin were matched for age, sex, body mass index and severity of illness scores. Major and minor bleeding complications, thromboembolic events, administered number of erythrocyte concentrates, thrombocytes and fresh-frozen plasmas were assessed. The number of extracorporeal circuit systems and extracorporeal lung support cannulas needed due to clotting was recorded. Also assessed was the efficacy to reach the targeted activated partial thromboplastin time (aPTT) in the first consecutive 14 days of therapy, and the controllability of aPTT values is within a therapeutic range of 50-75 s. Fisher's exact test, Mann-Whitney U tests, Friedman tests and multivariate nonparametric analyses for longitudinal data (MANOVA; Brunner's analysis) were applied where appropriate. RESULTS Of the 535 patients who met the inclusion criteria, 39 receiving argatroban and 39 matched patients receiving heparin (controls) were included. Baseline characteristics were similar between the two groups, including severity of illness and organ failure scores. There were no significant differences in major and minor bleeding complications. Rates of thromboembolic events were generally low and were similar between the two groups, as were the rates of transfusions required and device-associated complications. The controllability of both argatroban and heparin improved over time, with a significantly increasing probability to reach the targeted aPTT corridor over the first days (p < 0.001). Over time, there were significantly fewer aPTT values below the targeted aPTT goal in the argatroban group than in the heparin group (p < 0.05). Both argatroban and heparin reached therapeutic aPTT values for adequate application of extracorporeal lung support. CONCLUSIONS Argatroban appears to be a feasible, effective and safe anticoagulant for critically ill ARDS patients undergoing extracorporeal lung support.
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Affiliation(s)
- Mario Menk
- Department of Anesthesiology and Operative Intensive Care Medicine (CCM/CVK), Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Campus Virchow-Klinikum, Augustenburger Platz 1, 13353, Berlin, Germany.
| | - Philipp Briem
- Department of Anesthesiology and Operative Intensive Care Medicine (CCM/CVK), Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Campus Virchow-Klinikum, Augustenburger Platz 1, 13353, Berlin, Germany
| | - Björn Weiss
- Department of Anesthesiology and Operative Intensive Care Medicine (CCM/CVK), Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Campus Virchow-Klinikum, Augustenburger Platz 1, 13353, Berlin, Germany
| | - Martina Gassner
- Department of Anesthesiology and Operative Intensive Care Medicine (CCM/CVK), Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Campus Virchow-Klinikum, Augustenburger Platz 1, 13353, Berlin, Germany
| | - David Schwaiberger
- Department of Anesthesiology and Operative Intensive Care Medicine (CCM/CVK), Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Campus Virchow-Klinikum, Augustenburger Platz 1, 13353, Berlin, Germany
| | - Anton Goldmann
- Department of Anesthesiology and Operative Intensive Care Medicine (CCM/CVK), Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Campus Virchow-Klinikum, Augustenburger Platz 1, 13353, Berlin, Germany
| | - Christian Pille
- Department of Anesthesiology and Operative Intensive Care Medicine (CCM/CVK), Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Campus Virchow-Klinikum, Augustenburger Platz 1, 13353, Berlin, Germany
| | - Steffen Weber-Carstens
- Department of Anesthesiology and Operative Intensive Care Medicine (CCM/CVK), Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Campus Virchow-Klinikum, Augustenburger Platz 1, 13353, Berlin, Germany
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Ezekwudo DE, Chacko R, Gbadamosi B, Batool S, Gaikazian S, Warkentin TE, Sheppard JAI, Jaiyesimi I. Apixaban for treatment of confirmed heparin-induced thrombocytopenia: a case report and review of literature. Exp Hematol Oncol 2017; 6:21. [PMID: 28725494 PMCID: PMC5513338 DOI: 10.1186/s40164-017-0080-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Accepted: 07/05/2017] [Indexed: 02/08/2023] Open
Abstract
Background Heparin-induced thrombocytopenia (HIT) is a life and limb-threatening condition caused by the binding of platelet-activating antibodies (IgG) to multimolecular platelet factor 4 (PF4)/heparin complexes because of heparin exposure. The by-product of this interaction is thrombin formation which substantially increases the risk of venous and/or arterial thromboembolism. Currently, only one anticoagulant, argatroban, is United States Food and Drug Administration-approved for management of HIT; however, this agent is expensive and can only be given by intravenous infusion. Recently, several retrospective case-series, case reports, and one prospective study suggest that direct oral anticoagulants (DOACs) are also efficacious for treating HIT. We further review the literature regarding current diagnosis and clinical management of HIT. Case presentation A 66-year-old male patient developed HIT beginning on day 5 post-cardiovascular surgery; the platelet count nadir on day 10 measured 16 × 109/L. Both the PF4-dependent ELISA and Serotonin-release assay were strongly positive. Despite initial anticoagulation with argatroban (day 6), the patient developed symptomatic Doppler ultrasound-documented bilateral lower extremity deep vein thrombosis on day 14 post-surgery. The patient was transitioned to the DOAC, apixaban, while still thrombocytopenic (platelet count 108) and discharged to home, with platelet count recovery and no further thrombosis at 3-month follow-up. Conclusions We report a patient with serologically confirmed HIT who developed symptomatic bilateral lower limb deep vein thrombosis despite anticoagulation with argatroban. The patient was switched to oral apixaban and made a complete recovery. Our patient case adds to the emerging literature suggesting that DOAC therapy is safe and efficacious for management of proven HIT.
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Affiliation(s)
- Daniel E Ezekwudo
- Department of Hematology and Oncology, William Beaumont Hospital, Oakland University William Beaumont School of Medicine, 3577 W. 13 Mile Rd., Suite 202a, Royal Oak, MI USA
| | - Rebecca Chacko
- Department of Internal Medicine, William Beaumont Hospital, Oakland University William Beaumont School of Medicine, Royal Oak, MI USA
| | - Bolanle Gbadamosi
- Department of Hematology and Oncology, William Beaumont Hospital, Oakland University William Beaumont School of Medicine, 3577 W. 13 Mile Rd., Suite 202a, Royal Oak, MI USA
| | - Syeda Batool
- Department of Internal Medicine, William Beaumont Hospital, Oakland University William Beaumont School of Medicine, Royal Oak, MI USA
| | - Sussana Gaikazian
- Department of Hematology and Oncology, William Beaumont Hospital, Oakland University William Beaumont School of Medicine, 3577 W. 13 Mile Rd., Suite 202a, Royal Oak, MI USA
| | - Theodore E Warkentin
- Department of Medicine, McMaster University, 1280 Main St W, Hamilton, ON L8S 4L8 Canada.,Department of Pathology & Molecular Medicine, McMaster University, 1280 Main St W, Hamilton, ON L8S 4L8 Canada
| | - Jo-Ann I Sheppard
- Department of Medicine, McMaster University, 1280 Main St W, Hamilton, ON L8S 4L8 Canada.,Department of Pathology & Molecular Medicine, McMaster University, 1280 Main St W, Hamilton, ON L8S 4L8 Canada
| | - Ishmael Jaiyesimi
- Department of Hematology and Oncology, William Beaumont Hospital, Oakland University William Beaumont School of Medicine, 3577 W. 13 Mile Rd., Suite 202a, Royal Oak, MI USA.,Department of Internal Medicine, William Beaumont Hospital, Oakland University William Beaumont School of Medicine, Royal Oak, MI USA
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Comparisons of argatroban to lepirudin and bivalirudin in the treatment of heparin-induced thrombocytopenia: a systematic review and meta-analysis. Int J Hematol 2017; 106:476-483. [DOI: 10.1007/s12185-017-2271-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Revised: 05/24/2017] [Accepted: 05/31/2017] [Indexed: 11/25/2022]
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Pishko AM, Cuker A. Heparin-Induced Thrombocytopenia in Cardiac Surgery Patients. Semin Thromb Hemost 2017; 43:691-698. [PMID: 28597462 DOI: 10.1055/s-0037-1602664] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Allyson M Pishko
- Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Adam Cuker
- Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania.,Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
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Bolbrinker J, Garbe E, Douros A, Huber M, Bronder E, Klimpel A, Andersohn F, Meyer O, Salama A, Kreutz R. Immobilization and high platelet count are associated with thromboembolic complications in heparin-induced thrombocytopenia. Pharmacoepidemiol Drug Saf 2017; 26:1149-1155. [DOI: 10.1002/pds.4235] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Revised: 03/24/2017] [Accepted: 04/23/2017] [Indexed: 01/22/2023]
Affiliation(s)
- Juliane Bolbrinker
- Institute of Clinical Pharmacology and Toxicology, Charité - Universitätsmedizin Berlin; Berlin Germany
| | - Edeltraut Garbe
- Institute of Clinical Pharmacology and Toxicology, Charité - Universitätsmedizin Berlin; Berlin Germany
- Department of Clinical Epidemiology; Leibniz Institute for Prevention Research and Epidemiology - BIPS; Bremen Germany
| | - Antonios Douros
- Institute of Clinical Pharmacology and Toxicology, Charité - Universitätsmedizin Berlin; Berlin Germany
| | - Matthias Huber
- Institute of Clinical Pharmacology and Toxicology, Charité - Universitätsmedizin Berlin; Berlin Germany
| | - Elisabeth Bronder
- Institute of Clinical Pharmacology and Toxicology, Charité - Universitätsmedizin Berlin; Berlin Germany
| | - Andreas Klimpel
- Institute of Clinical Pharmacology and Toxicology, Charité - Universitätsmedizin Berlin; Berlin Germany
| | - Frank Andersohn
- Institute of Social Medicine, Epidemiology and Health Economics, Charité - Universitätsmedizin Berlin; Berlin Germany
- Frank Andersohn Consulting & Research Services; Berlin Germany
| | - Oliver Meyer
- Institute of Transfusion Medicine, Charité - Universitätsmedizin Berlin; Germany
| | - Abdulgabar Salama
- Institute of Transfusion Medicine, Charité - Universitätsmedizin Berlin; Germany
| | - Reinhold Kreutz
- Institute of Clinical Pharmacology and Toxicology, Charité - Universitätsmedizin Berlin; Berlin Germany
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Bain J, Flannery AH, Flynn J, Dager W. Heparin induced thrombocytopenia with mechanical circulatory support devices: review of the literature and management considerations. J Thromb Thrombolysis 2017; 44:76-87. [DOI: 10.1007/s11239-017-1494-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Pathak R, Bhatt VR, Karmacharya P, Aryal MR, Donato AA. Medical and Economic Burden of Heparin-Induced Thrombocytopenia: A Retrospective Nationwide Inpatient Sample (NIS) Study. J Hosp Med 2017; 12:94-97. [PMID: 28182804 DOI: 10.12788/jhm.2687] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
In recent years, US hospitals have switched from use of unfractionated heparin to use of low-molecular-weight heparin, which is associated with lower risk of heparin-induced thrombocytopenia (HIT). In the study reported here, we retrospectively searched the Nationwide Inpatient Sample (NIS) for patients who were at least 18 years old and received a diagnosis of HIT between 2009 and 2011. Our goal was to get an updated perspective on the incidence and economic impact of HIT. We calculated the incidence of HIT overall and in subgroups of patients who underwent cardiac, vascular, or orthopedic surgery. We compared characteristics of patients with and without HIT and compared characteristics of patients with HIT with thrombosis (HITT) and HIT patients without thrombosis. Of 98,636,364 hospitalizations, 72,515 (0.07%) involved HIT. Arterial and venous thromboses were identified in 24,880 (34.3%) of HIT cases. Men were slightly more likely to have a HIT diagnosis (50.1%), but women had higher rates of HIT after cardiac surgery (odds ratio [OR], 1.41; 95% confidence interval [CI], 1.26-1.58) and vascular surgery (OR, 1.42; 95% CI, 1.29-1.57). Rates of HIT were 0.53% (95% CI, 0.51%-0.54%) after cardiac surgery, 0.28% (95% CI, 0.28%-0.29%) after vascular surgery, and 0.05% (95% CI, 0.05%-0.06%) after orthopedic surgery. HIT and HITT cases were significantly (P ⟨ 0.001) more likely than non-HIT cases to be fatal (9.63% and 12.28% vs 2.19%), and they had significantly higher costs and longer inpatient stays. HIT and especially HITT are associated with increased mortality, costs, and length of stay. Journal of Hospital Medicine 2017;12:94-97.
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Affiliation(s)
- Ranjan Pathak
- Department of Internal Medicine, Reading Health System, West Reading, PA, USA
| | - Vijaya Raj Bhatt
- Division of Hematology-Oncology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NB, USA
| | - Paras Karmacharya
- Department of Internal Medicine, Reading Health System, West Reading, PA, USA
| | - Madan Raj Aryal
- Department of Internal Medicine, Reading Health System, West Reading, PA, USA
| | - Anthony A Donato
- Department of Internal Medicine, Reading Health System, West Reading, PA, USA
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Al-Eidan FAS. Pharmacotherapy of heparin-induced thrombocytopenia: therapeutic options and challenges in the clinical practices. JOURNAL OF VASCULAR NURSING 2016; 33:10-20. [PMID: 25700733 DOI: 10.1016/j.jvn.2014.07.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2014] [Revised: 07/28/2014] [Accepted: 07/28/2014] [Indexed: 12/20/2022]
Abstract
Heparin-induced thrombocytopenia (HIT) is an immune response to heparin associated with significant morbidity and mortality in hospitalized patients if unidentified as soon as possible, owing to thromboembolic complications involving both arterial and venous systems. Early diagnoses based on a comprehensive interpretation of clinical and laboratory information improves clinical outcomes. Management principles of strongly suspected HIT should not be delayed for laboratory result confirmation. Treatment strategies have been introduced including new, safe, and effective agents. This review summarizes the clinical therapeutic options for HIT addressing the use of parenteral direct thrombin inhibitors and indirect factor Xa inhibitors as well as the potential non-vitamin K antagonist oral anticoagulants.
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Affiliation(s)
- Fahad A S Al-Eidan
- College of Medicine, King Saud Bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia.
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Reilly MP, Weiss R, Askenase A, Tuite C, Soulen M, Mohler ER. Hirudin therapy during thrombolysis for venous thrombosis in heparin-induced thrombocytopenia. Vasc Med 2016. [DOI: 10.1177/1358836x0000500407] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Heparin-induced thrombocytopenia (HIT) is the most common drug-related thrombocytopenia. Thromboembolic complications occur in approximately 50% of patients with HIT and result in limb amputation and death in up to 20% and 30% respectively. Because patients with a history of HIT may require future intravenous anticoagulation but have a high-risk of thromboembolism if re-challenged with heparin, alternative therapies are necessary when further anticoagulation is indicated. The use of direct thrombin inhibitors in HIT patients who also require thrombolytic therapy offers unique challenges to anticoagulant monitoring and safety. We present a case of progressive ileofemoral deep venous thrombosis in a patient with a history of HIT in order to review the combined use of hirudin and thrombolysis in this setting.
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Affiliation(s)
- Muredach P Reilly
- Departments of Medicine and Radiology, University of Pennsylvania School of Medicine, Philadelphia, PA, USA
| | - Richard Weiss
- Departments of Medicine and Radiology, University of Pennsylvania School of Medicine, Philadelphia, PA, USA
| | - Alan Askenase
- Departments of Medicine and Radiology, University of Pennsylvania School of Medicine, Philadelphia, PA, USA
| | - Catherine Tuite
- Departments of Medicine and Radiology, University of Pennsylvania School of Medicine, Philadelphia, PA, USA
| | - Michael Soulen
- Departments of Medicine and Radiology, University of Pennsylvania School of Medicine, Philadelphia, PA, USA
| | - Emile R Mohler
- Departments of Medicine and Radiology, University of Pennsylvania School of Medicine, Philadelphia, PA, USA
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Heparin-induced thrombocytopenia associated with polycythemia vera during the treatment of acute coronary syndrome. J Cardiol Cases 2016; 14:52-55. [DOI: 10.1016/j.jccase.2016.03.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Revised: 03/01/2016] [Accepted: 03/24/2016] [Indexed: 11/20/2022] Open
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Wallis DE, Lewis BE, Messmore H, Wehrmacher WH. State-of-the-Art Review : Heparin-induced Thrombocytopenia and Thrombosis Syndrome. Clin Appl Thromb Hemost 2016. [DOI: 10.1177/107602969800400303] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Affiliation(s)
- Diane E. Wallis
- Cardiovascular Institute and Section of Hematology, Department of Medicine, Loyola University Medical Center, Maywood, Illinois, and Hines Veterans Hospital, Hines, Illinois, U.S.A
| | - Bruce E. Lewis
- Cardiovascular Institute and Section of Hematology, Department of Medicine, Loyola University Medical Center, Maywood, Illinois, and Hines Veterans Hospital, Hines, Illinois, U.S.A
| | - Harry Messmore
- Cardiovascular Institute and Section of Hematology, Department of Medicine, Loyola University Medical Center, Maywood, Illinois, and Hines Veterans Hospital, Hines, Illinois, U.S.A
| | - William H. Wehrmacher
- Cardiovascular Institute and Section of Hematology, Department of Medicine, Loyola University Medical Center, Maywood, Illinois, and Hines Veterans Hospital, Hines, Illinois, U.S.A
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Adess M, Eisner R, Nand S, Godwin J, Messmore HL, Wehrmacher WH. Thromboembolism in Cancer Patients: Pathogenesis and Treatment. Clin Appl Thromb Hemost 2016; 12:254-66. [PMID: 16959679 DOI: 10.1177/1076029606291432] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
In this review we summarize the causes of cancer related thrombosis as well as modern treatment approaches. Malignancy as a risk factor for thromboembolism is becoming increasingly recognized by clinicians caring for these patients. The probability of thrombosis occurring in an individual patient is dependent on several factors, including accompanying medical problems, the type of cancer, the clinical stage, performance status, and the treatment modalities employed. Thrombophilia with a history of thromboembolism is important as well. The overall risk of thrombosis is sevenfold that of noncancer patients. Though much has been learned about the pathogenesis of cancer-related thrombosis, we are in fact just beginning to understand the cross-talk between cancer cells and their related microenvironment, and such investigations are likely to increase our knowledge of cancer-related thrombosis mechanisms. Research in these areas may also suggest new strategies for cancer prevention, metastasis suppression, and new treatments. Drugs used in cancer therapy are increasingly recognized to directly contribute to the thrombotic tendency. Few studies provide data on the optimal management of cancer patients with thrombosis. It has been learned that retreating with the same drug can be very hazardous. In general the approach to prevention of thrombosis is the same as for noncancer patients, recognizing that specific cancer types and stage can place a patient in a high-risk category. Initial coumadin therapy fails in a significant number of patients with cancer. Recognition of the cancer patients at highest risk for coumadin failure is challenging. Low-molecular-weight heparins appear to be more effective in such situations where coumadin is likely to fail or has failed, but these drugs are thought to be costlier. Newer agents such as Factor Xa inhibitors and TF inhibitors are currently under investigation and may be found useful in the management of cancer-related thrombosis.
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Affiliation(s)
- Matthew Adess
- Loyola University Stritch School of Medicine, Maywood, IL 60153, USA
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Kannan M, Ahmed R, Kale S, Ahmad S, Fareed J, Saxena R. Laboratory Diagnosis of Heparin-Induced Thrombocytopenia in Asian Indians as Investigated With Functional and Immunologic Methods. Clin Appl Thromb Hemost 2016; 10:51-4. [PMID: 14979405 DOI: 10.1177/107602960401000108] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Heparin-induced thrombocytopenia (HIT) was looked for in 33 Indian patients undergoing cardiovascular surgery who received unfractionated heparin (UFH). Platelet counts were performed before the initiation of UFH therapy and 5 to 16 days after administration of the therapy. A decrease in patients' platelet count >35% of the baseline value or <100,000/μL was considered to be suggestive of HIT syndrome. Heparin-induced platelet aggregation (HIPA) and enzyme-linked immunosorbent assay (ELISA) tests were performed in all the patients to detect antibodies against heparin/PF4 complex. Thrombocytopenia was found to be present in 10 (30%) patients. Of these, two patients were found to be positive as detected by HIPA and ELISA tests. These two patients were considered to have classic HIT syndrome. One of these had bleeding while the other was asymptomatic. Among the 23 non-thrombocytopenic patients and controls, HIT antibodies were not detectable by HIPA test in all but absent by ELISA in only 21 of them. Two of 23 non-thrombocytopenic patients had positive results on the ELISA test. Because the latter had negative test results on HIPA, they were considered to be false-positive results. Thus, HIT syndrome develops in approximately 6% of Indian patients treated with UFH.
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Affiliation(s)
- Meganathan Kannan
- Department of Haematology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
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Abstract
Thrombocytopenia is a common laboratory finding in the intensive care unit (ICU) patient. Because the causes can range from laboratory artifact to life-threatening processes such as thrombotic thrombocytopenic purpura (TTP), identifying the cause of thrombocytopenia is important. In the evaluation of the thrombocytopenia patient, one should incorporate all clinical clues such as why the patient is in the hospital, medications the patient is on, and other abnormal laboratory findings. One should ensure that the patient does not suffer from heparin-induced thrombocytopenia (HIT) or one of the thrombotic microangiopathies (TMs). HIT can present in any patient on heparin and requires specific testing and antithrombotic therapy. TMs cover a spectrum of disease ranging from TTP to pregnancy complications and can have a variety of presentations. Management of disseminated intravascular coagulation depends on the patient’s condition and complication. Other causes of ICU thrombocytopenia include sepsis, medication side effects, post-transfusion purpura, catastrophic anti phospholipid antibody disease, and immune thrombocytopenia.
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50
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Reducing the hospital burden of heparin-induced thrombocytopenia: impact of an avoid-heparin program. Blood 2016; 127:1954-9. [PMID: 26817956 DOI: 10.1182/blood-2015-07-660001] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Accepted: 01/13/2016] [Indexed: 12/22/2022] Open
Abstract
Heparin-induced thrombocytopenia (HIT) is an adverse drug reaction occurring in up to 5% of patients exposed to unfractionated heparin (UFH). We examined the impact of a hospital-wide strategy for avoiding heparin on the incidence of HIT, HIT with thrombosis (HITT), and HIT-related costs. The Avoid-Heparin Initiative, implemented at a tertiary care hospital in Toronto, Ontario, Canada, since 2006, involved replacing UFH with low-molecular-weight heparin (LMWH) for prophylactic and therapeutic indications. Consecutive cases with suspected HIT from 2003 through 2012 were reviewed. Rates of suspected HIT, adjudicated HIT, and HITT, along with HIT-related expenditures were compared in the pre-intervention (2003-2005) and the avoid-heparin (2007-2012) phases. The annual rate of suspected HIT decreased 42%, from 85.5 per 10 000 admissions in the pre-intervention phase to 49.0 per 10 000 admissions in the avoid-heparin phase ( ITALIC! P< .001). The annual rate of patients with a positive HIT assay decreased 63% from 16.5 to 6.1 per 10 000 admissions ( ITALIC! P< .001), adjudicated HIT decreased 79% from 10.7 to 2.2 per 10 000 admissions ( ITALIC! P< .001), and HITT decreased 91% from 4.6 to 0.4 per 10 000 admissions ( ITALIC! P< .001). Hospital HIT-related expenditures decreased by $266 938 per year in the avoid-heparin phase. To the best of our knowledge, this is the first study demonstrating the success and feasibility of a hospital-wide HIT prevention strategy.
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