George Fritsma

MS, MLS, Lab Scientist, Educator, Author

George Fritsma is a medical laboratory scientist, educator, and author. George contributed five chapters to Keohane EM, Butina MM, Mirza KM, Walenga JM: Rodak’s Hematology; Clinical Principles and Applications, Seventh Edition, 2025, Elsevier; and is the co-author of Bennett A, Fritsma GA, Ernst DJ: Quick Guide to Blood Collection Edition 2, 2016, Marques MB, Fritsma GA: Quick Guide to Coagulation Testing Edition 3, 2015, and Reddy V, Marques MB, Fritsma GA: Quick Guide to Hematology Testing Edition 2, 2013, along with three additional titles, all published by AACC Press. He is a consultant in the Laboratory Medicine Department of Pathology at the University of Alabama at Birmingham. George is a member of the International Society on Thrombosis and Hemostasis, the International Society for Laboratory Hematology, and the American Society for Clinical Laboratory Science.

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November 2026 QQ: Antifibrinolytic

Our November QQ asks: “Which is an antifibrinolytic used to control bleeding?” Antifibrinolytics are part of a series of therapeutics used to control hemorrhage in acquired or congenital bleeding disorders or in preparation for potentially bloody surgeries. The key reference for this question is Murphy MC, Klein HG. Blood Component and Pharmacologic Therapy for Hemostatic […]

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Quick Question Archive

Mobility and VTE

Results of a study linking immobility and VTE: Hoyer EH, Brotman DJ, Young DL, et al. Every step counts: incremental mobility and venous thromboembolism risk among adult general medicine inpatients. J Thromb Haemost. 2026:S1538-7836(26)00566-0. doi: 10.1016/j.jtha.2026.09.006. PMID: 42731731. Available from your local medical library. Abstract Background: Hospital-associated venous thromboembolism (VTE) is a leading but preventable […]

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Thrombophilia

Anti-XIa Anticoagulant Ineffective in Phase 3 Trial

Check your local medical library for the disappointing results of a phase 3 Milvexian (anti-XIa) trial Gibson CM, Steg PG, Bahit MC, et al. LIBREXIA ACS Committees and Investigators. Milvexian with antiplatelet therapy after an acute coronary syndrome event. N Engl J Med. 2026;395(16):1575–84. doi: 10.1056/NEJMoa2608717. PMID: 42670965. Abstract Background Patients are at increased risk […]

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Anticoagulant Therapy

D-dimer Assay and Harmonization

Check with your local medical library for Salazar E, Smock KJ, Cazzolli T, Dlott JS, et al. D-Dimer reporting and harmonization: Analysis of College of American Pathologists D-Dimer Proficiency Testing Program. Semin Thromb Hemost. 2026;52(8):975-981. doi: 10.1055/a-2803-3165. PMID: 41651008. Abstract Measurement of D-dimer, a fibrin degradation product, is crucial for diagnosing thrombotic and fibrinolytic conditions. […]

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Fibrinolysis

CanVECTOR and Thrombosis Canada Conferences November 7

Thrombosis Unpacked: Decisions That Matter November 7, 2026 Join healthcare professionals from across Canada in Montreal for two days of practical, multidisciplinary education focused on difficult thrombosis and anticoagulation decisions encountered in real-world clinical care. The 2026 CanVECTOR and Thrombosis Canada Conferences bring together clinicians, researchers, pharmacists, nurses, and healthcare professionals to explore evolving evidence, controversial […]

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Events

Platelets in Children

Check with your local medical library for this review on pediatric platelet development: Letunica N, Monagle P, Attard C. Platelets in children: physiological function, developmental regulation, and clinical significance in disease states. Semin Thromb Hemost. 2026. doi: 10.1055/a-2907-8906. PMID: 42442705. Abstract Platelets play a fundamental role in hemostasis; however, their phenotype, reactivity, and function vary […]

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Platelet Function Testing

Clinical Anticoagulant Measurement

Check your local medical library for these anticoagulation measurement reviews published in the November 2026 issue of Seminars in Thrombosis and Hemostasis: Favaloro EJ, Reardon B, Pasalic L. Laboratory monitoring and measuring of clinical anticoagulants. Semin Thromb Hemost. 2026;52(8):927–36. doi: 10.1055/a-2907-8841. PMID: 42442704. Abstract Haemostasis reflects a balance between procoagulant and anticoagulant forces. A relative […]

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Anticoagulant Therapy

November 2026 Cheat Sheet

Hello, click below for your November 2026 Cheat Sheet. If you would like a push copy with links to our recent posts, please complete the application form on the right. Fritsma Factor is hosted by our family of hemostasis diagnostics providers, Precision BioLogic, Affinity Biologicals, and George King Bio-Medical, and our informational services are gratis. […]

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Cheat Sheets

October 2026 QQ: Anti-Phospholipid Antibody Summary

Our October 2026 quiz, with 32 respondents, asked, “Which is NOT an antiphospholipid antibody?” The answers reveal participants’ wisdom: Anti beta-2 glycoprotein 1: 1 (3%) Alpha-2 antiplasmin: 23 (72%) Lupus anticoagulant: 1 (3%) Antiprothrombin: 7 (22%) Anticardiolipin: 0 The only mislead that attracted respondents was antiprothrombin, a relatively rare APL that is associated with bleeding. […]

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Quick Question Archive

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