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lupus anticoagulant testing

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https://www.readbyqxmd.com/read/28525532/the-effects-of-indirect-and-direct-acting-anticoagulants-on-lupus-anticoagulant-assays-a-large-retrospective-study-at-a-coagulation-reference-laboratory
#1
Jansen N Seheult, Michael P Meyer, Franklin A Bontempo, Irina Chibisov
Objectives: To investigate the effects of indirect- and direct-acting anticoagulants on the interpretation of lupus anticoagulant (LAC) assays. Methods: A retrospective database review was performed to identify all LAC panels from November 2012 to November 2015. The positivity rates for three LAC tests were compared among various anticoagulant medications. Results: This analysis included 7,721 LAC panels. Direct oral anticoagulants, warfarin, and unfractionated heparin (UFH) were associated with higher LAC positivity rates compared with patients not receiving documented anticoagulation (83% for argatroban, 58% for dabigatran, 72% for rivaroxaban, 53% for apixaban, 56% for warfarin, and 36% for UFH vs 29% for no anticoagulation, P < ...
May 19, 2017: American Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28516871/diagnosis-of-catastrophic-anti-phospholipid-syndrome-in-a-patient-tested-negative-for-conventional-tests
#2
Fabrizio Conti, Roberta Priori, Cristiano Alessandri, Roberta Misasi, Antonella Capozzi, Monica Pendolino, Simona Truglia, Silvia Frisenda, Maurizio Sorice, Guido Valesini
Catastrophic antiphospholipid syndrome (CAPS) is a severe variant of APS, characterised by clinical evidence of multiple organ involvement developing over a very short period of time, histopathological evidence of multiple small vessel occlusions and laboratory confirmation of the presence of aPL (lupus anticoagulant and/or anticardiolipin antibodies and/or anti-Beta2-glcyoprotein I antibodies). Here we report a case of a 39-year-old woman patient who developed a CAPS which was negative to the conventional aPL but positive for aPL in thin layer chromatography immunostaining and vimentin/cardiolipin antibodies by ELISA test...
May 8, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28501666/an-unexpectedly-high-rate-of-thrombophilia-disorders-in-patients-with-superficial-vein-thrombosis-of-the-lower-extremities
#3
Marcone Lima Sobreira, Silvia Regina Rogatto, Rodrigo Mattos Dos Santos, Izolete Thomazini Santos, Iracema Carvalho Ferrari, Winston Bonetti Yoshida
BACKGROUND: Superficial vein thrombosis is a common venous condition. Recent studies have shown that SVT is associated with high frequency of thromboembolic complications: from 22 to 37 % for deep venous thrombosis and up to 33% for pulmonary embolism. OBJECTIVES: To assess the prevalence of major hereditary and acquired thrombophilic factors in patients with SVT. PATIENTS AND METHODS: 66 patients presenting with primary ST underwent evaluation for thrombophilia: molecular testing for the factor V Leiden and factor II G20210A (prothrombin) mutations, protein C, protein S, antithrombin deficiency, presence of lupus anticoagulant, as well as anti-cardiolipin antibody titers...
May 10, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28470650/the-clinical-relevance-of-noncriteria-antiphospholipid-antibodies
#4
Maria Laura Bertolaccini, Giovanni Sanna
While lupus anticoagulant (LA), anticardiolipin antibodies (aCL), anti-β2 glycoprotein I (anti-β2GPI) antibodies represent the best available and the most widely used tests in the investigation for antiphospholipid syndrome (APS), evidence gathered in recent years indicates that other antiphospholipid antibodies (aPL) specificities may also play a role in the syndrome. Several autoantibodies have been shown to be complexed with phospholipids other than cardiolipin, or to some domains of β2GPI, or else directed to other proteins of the coagulation cascade, and these have also been proposed to be of relevance to APS, and their diagnostic value and clinical utility are the focus of current research...
May 3, 2017: Seminars in Thrombosis and Hemostasis
https://www.readbyqxmd.com/read/28447421/clinical-decision-support-for-hematology-laboratory-test-utilization
#5
REVIEW
R Jackups, J J Szymanski, S P Persaud
Clinical decision support (CDS) is the use of information and communication technologies to improve clinical decision making and patient care. CDS applications have been used in many aspects of health care, including medication ordering and diagnostic prediction algorithms. As economic and regulatory pressures place a strain on laboratory resources, the potential of CDS to improve utilization of laboratory testing has also begun to be realized. Hematology and coagulation laboratories stand to gain tremendously from the implementation of CDS interventions, given their mixture of high-volume, low-cost tests (eg CBC, PT, aPTT) and tests that carry a high potential of being misused or misinterpreted (eg lupus anticoagulant, erythrocyte sedimentation rate, heparin-induced thrombocytopenia testing)...
May 2017: International Journal of Laboratory Hematology
https://www.readbyqxmd.com/read/28401801/thrombophilia-in-153-patients-with-premature-cardiovascular-disease-%C3%A2-age-45
#6
Alexander Milgrom, Kevin Lee, Matan Rothschild, Frini Makadia, Greg Duhon, Sarah Min, Ping Wang, Charles J Glueck
We assessed contributions of thrombophilia to premature cardiovascular disease (CVD) events (≤ age 45) in 153 patients. Test results of thrombophilia-hypofibrinolysis were obtained in 153 patients with CVD ≤ age 45, 110 healthy normal controls, and 110 patients who had venous thromboembolism (VTE) without CVD. Of the 153 patients with CVD, 121 (79%) had sustained myocardial infarction, 70 (46%) had coronary artery stenting, and 53 (35%) had coronary artery bypass grafts. The first CVD events occurred at ages >20 to 35 in 47 patients and at ages >35 to 45 in 106 patients...
January 1, 2017: Clinical and Applied Thrombosis/hemostasis
https://www.readbyqxmd.com/read/28390037/clinical-usefulness-of-the-dilute-russell-viper-venom-time-test-for-patients-taking-warfarin
#7
Kazunori Kanouchi, Hiroto Narimatsu, Okio Ohnuma, Keita Morikane, Akira Fukao
Warfarin use often causes false-positive results in the dilute Russell viper venom time test (DRVVT). Thus, three sets of guidelines-those presented by the International Society on Haemostasis and Thrombosis (ISTH), the British Committee for Standards in Haematology (BCSH), and the Clinical and Laboratory Standards Institute (CLSI)-are advocated. We evaluated the clinical usefulness of the testing methods recommended in these three guidelines using laboratory samples. Of the 242 samples from patients using warfarin, 38 were positive for lupus anticoagulant (LA)...
April 7, 2017: International Journal of Hematology
https://www.readbyqxmd.com/read/28389175/validation-of-a-multi-analyte-panel-with-cell-bound-complement-activation-products-for-systemic-lupus-erythematosus
#8
Thierry Dervieux, John Conklin, Jo-Anne Ligayon, Leilani Wolover, Tyler O'Malley, Roberta Vezza Alexander, Arthur Weinstein, Claudia A Ibarra
BACKGROUND: We describe the analytical validation of an assay panel intended to assist clinicians with the diagnosis of systemic lupus erythematosus (SLE). The multi-analyte panel includes quantitative assessment of complement activation and measurement of autoantibodies. METHODS: The levels of the complement split product C4d bound to erythrocytes (EC4d) and B-lymphocytes (BC4d) (expressed as mean fluorescence intensity [MFI]) are measured by quantitative flow cytometry, while autoantibodies (inclusive of antinuclear and anti-double stranded DNA antibodies) are determined by immunoassays...
April 5, 2017: Journal of Immunological Methods
https://www.readbyqxmd.com/read/28363116/clinical-significance-of-anti-domain-1-%C3%AE-2-glycoprotein-i-antibodies-in-antiphospholipid-syndrome
#9
Teresa Iwaniec, Marcin P Kaczor, Magdalena Celińska-Löwenhoff, Stanisław Polański, Jacek Musiał
BACKGROUND: Antiphospholipid syndrome (APS) is characterized by the presence of circulating antiphospholipid antibodies (aPL) in patients with thrombosis and/or pregnancy morbidity. In APS patients anti-domain 1 β2-glycoprotein I (anti-D1 β2GPI) IgG antibodies correlate strongly with thrombosis and to the lesser extent, with pregnancy complications. The aim of this study was to assess clinical utility of the anti-D1 β2GPI antibodies in the diagnosis and risk stratification of antiphospholipid syndrome...
February 24, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/28339917/hellp-syndrome-as-a-potential-cause-of-false-positive-lupus-anticoagulant-testing
#10
Zhen Mei, Krzysztof Mikrut, Jonathan Miller
No abstract text is available yet for this article.
March 1, 2017: American Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28339897/reflex-lupus-anticoagulant-and-coagulation-factor-testing-has-low-utility-in-the-preoperative-surgical-hemostasis-assessment
#11
Stephen P Persaud, Ronald Jackups
No abstract text is available yet for this article.
March 1, 2017: American Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28316135/variability-of-cut-off-values-for-the-detection-of-lupus-anticoagulants-results-of-an-international-multicenter-multiplatform-study
#12
A Tripodi, V Chantarangkul, M Cini, K Devreese, J S Dlott, R Giacomello, E Gray, C Legnani, M E Martinuzzo, P Pradella, A Siegemund, S Subramanian, P Suchon, S Testa
Essentials Between-lab variations of cut-off values in lupus anticoagulant detection are unknown. Cut-off values were calculated in 11 labs each testing plasma from 120 donors with 3 platforms. Major variation was observed even within the same platform. Cut-off values determined in different labs are not interchangeable. SUMMARY: Background Cut-off values for interpretation of lupus anticoagulant (LA) detection are poorly investigated. Aims (i) To assess whether results from healthy donors were normally distributed and (ii) the between-laboratories differences in cut-off values for screening, mixing and LA confirmation when calculated as 99th or 95th centiles, and (iii) to assess their impact on the detection rate for LA...
March 17, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28302338/-laboratory-diagnosis-of-antiphospholipid-syndrome-from-criteria-to-practice
#13
V Joste, M-A Dragon-Durey, L Darnige
The antiphospholipid syndrome is a bioclinical entity defined by thrombosis and/or obstetrical complications in the presence, at least 12 weeks apart, of antiphospholipid antibodies detected by coagulation test (lupus anticoagulant) or immunological assays (anticardiolipin, anti-β2-glycoprotein I antibodies). Biological markers' improvement such as anti-phosphatidylserine/prothrombin and biological score should allow better patients' management and preventive therapeutic for thrombosis and obstetrical complications...
March 14, 2017: La Revue de Médecine Interne
https://www.readbyqxmd.com/read/28279839/comorbid-association-of-antiphospholipid-antibodies-and-migraine-a-systematic-review-and-meta-analysis
#14
REVIEW
Md Asiful Islam, Fahmida Alam, Kah Keng Wong
BACKGROUND: Antiphospholipid antibodies (aPLs) namely anticardiolipin (aCL) antibody, anti-β2-glycoprotein I (β2GPI) antibody and lupus anticoagulant (LA) are autoantibodies produced against anionic phospholipids and proteins on plasma membranes. Migraine is a primary headache disorder which has growing evidences of autoimmune-mediated pathogenesis and previous studies suggested the presence of aPLs in migraine patients. AIMS: The aim of this study was to evaluate the comorbid association between aPLs (aCL, anti-β2GPI and LA) and migraine compared to healthy controls...
March 7, 2017: Autoimmunity Reviews
https://www.readbyqxmd.com/read/28279213/cardiovascular-risk-factors-are-major-determinants-of-thrombotic-risk-in-patients-with-the-lupus-anticoagulant
#15
Florian Posch, Johanna Gebhart, Jacob H Rand, Silvia Koder, Peter Quehenberger, Vittorio Pengo, Cihan Ay, Ingrid Pabinger
BACKGROUND: Patients with the lupus anticoagulant (LA) are at an increased risk of thrombotic events, which in turn increase the risk of death. Understanding the determinants of thrombotic risk in patients with LA may pave the way towards targeted thromboprophylaxis. In the Vienna Lupus Anticoagulant and Thrombosis Study (LATS), we systematically evaluate risk factors for thrombotic events in patients with LA. METHODS: We followed 150 patients (mean age: 41.3 years, female gender: n = 122 (81...
March 10, 2017: BMC Medicine
https://www.readbyqxmd.com/read/28267664/carotid-free-floating-thrombus-causing-stroke-in-a-young-woman-with-lupus-anticoagulant-a-case-report-and-review-of-the-literature
#16
Abolfazl Afsharfard, Barmak Gholizadeh, Younes Abdolalian, Seyed Masoud Hosseini
INTRODUCTION: In young adults Stroke is a challenging condition and various tests are needed to diagnose and manage its underlying problems. Free floating thrombosis of internal carotid artery (FFT-ICA) is one of the rare problems among carotid artery diseases which can lead to stroke in adults. Owing to limited cases of FFT-ICA there is not a worldwide accepted consensus on management of FFT-ICA, but some recurrences after medical management have been reported in the literature. PRESENTATION OF CASE: A-25-year old woman was referred to hospital with sudden onset aphasia and right sided hemiparesis...
February 20, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28258054/thrombophilia-risk-is-not-increased-in-children-after-perinatal-stroke
#17
Colleen Curtis, Aleksandra Mineyko, Patricia Massicotte, Michael Leaker, Xiu Yan Jiang, Amalia Floer, Adam Kirton
Perinatal stroke causes cerebral palsy and lifelong disability. Specific diseases are definable but mechanisms are poorly understood. Evidence suggests possible associations between arterial perinatal stroke and prothrombotic disorders but population-based, controlled, disease-specific studies are limited. Understanding thrombophilia in perinatal stroke informs pathogenesis models and clinical management. We conducted a population-based, prospective, case-control study to determine the association of specific perinatal stroke diseases with known thrombophilias...
March 3, 2017: Blood
https://www.readbyqxmd.com/read/28179389/homonymous-hemianopia-in-the-primary-antiphospholipid-syndrome
#18
Derek Kwun-Hong Ho, Rishi Ramessur, Mradul Gupta, John P Mathews
A woman aged 26 years was referred by her GP to the eye casualty department with sudden-onset left homonymous hemianopia and right-sided headache. Full ophthalmic examination was normal with the exception of a left homonymous hemianopia confirmed with automated perimetry. Urgent CT imaging revealed a non-haemorrhagic cerebral infarct in the right parieto-occipital region. Subsequent blood tests confirmed a diagnosis of antiphospholipid syndrome with positivity in IgG anticardiolipin antibody, IgG anti-β2-GP1 antibody and the Lupus anticoagulant screen...
February 8, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28153662/antiphospholipid-antibody-profile-based-obstetric-outcomes%C3%A2-of-primary-antiphospholipid-syndrome-the%C3%A2-pregnants-study
#19
Gabriele Saccone, Vincenzo Berghella, Giuseppe Maria Maruotti, Tullio Ghi, Giuseppe Rizzo, Giuliana Simonazzi, Nicola Rizzo, Fabio Facchinetti, Andrea Dall'Asta, Silvia Visentin, Laura Sarno, Serena Xodo, Dalila Bernabini, Francesca Monari, Amanda Roman, Ahizechukwu Chigoziem Eke, Ariela Hoxha, Amelia Ruffatti, Ewoud Schuit, Pasquale Martinelli
BACKGROUND: Antiphospholipid syndrome is an autoimmune, hypercoagulable state that is caused by antiphospholipid antibodies. Anticardiolipin antibodies, anti-β2 glycoprotein-I, and lupus anticoagulant are the main autoantibodies found in antiphospholipid syndrome. Despite the amassed body of clinical knowledge, the risk of obstetric complications that are associated with specific antibody profile has not been well-established. OBJECTIVE: The purpose of this study was to assess the risk of obstetric complications in women with primary antiphospholipid syndrome that is associated with specific antibody profile...
May 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28128085/antiphospholipid-syndrome-with-anti%C3%AE-2glicoprotein-1-antibodies-as-the-cause-of-recurrent-tibial-vein-thrombosis-in-sapho-syndrome
#20
Hanna Przepiera-Będzak, Marek Brzosko
The antiphospholipid antibody syndrome is defined by the presence of antiphospholipid antibodies in patients with recurrent venous or arterial thromboembolism (1). SAPHO syndrome is a rare disease, characterized by specific clinical manifestations of synovitis, acne pustulosis, hyperostosis, and osteitis. It is a disease that manifests with a combination of osseous and articular manifestations associated with skin lesions (2). Venous thrombosis complicating SAPHO syndrome seems to be uncommon with an unclear pathogenesis (3-9)...
December 2016: Acta Dermatovenerologica Croatica: ADC
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