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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August 2025 QQ: Coagulation Control Proteins

Our August 2026 Quick Question is a simple quiz that asks, “Which is NOT an endogenous coag control protein?” This is your opportunity to review the plasma-based coagulation mechanism and recall the functions of the control proteins, available in our Educational Module entitled Coagulation Overview. One of these is NOT an endogenous control protein for […]

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Quick Question Archive

Hemophilia A Patient Satisfaction With Extended Half-life Altuviiio® Therapy

Click here for an open-access post hoc study report on patient satisfaction with once-weekly Altuviiio® (Efanesoctocog alfa) therapy: Spasov E, Quon D, Fukutake K, et al. Treatment satisfaction and patient preference for efanesoctocog alfa over previous hemophilia A treatment: Results from the XTEND-1 phase 3 clinical trial. Curr Ther Res Clin Exp. 2026;105:100839. doi: 10.1016/j.curtheres.2026.100839. […]

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Bleeding Disorders

Simplified DOAC--Stop Proof of Concept

Click here for this 2024 open-access article describing the use of DOAC-Stop®: Exner T, Dangol M, Favaloro EJ. Simplified method for removing direct oral anticoagulant interference in mechanical coagulation test systems–a proof of concept. J Clin Med. 2024;13:1042. doi: 10.3390/jcm13041042. PMID: 38398355; PMCID: PMC10889288. Abstract Background: Direct oral anticoagulants (DOACs) cause unwanted interference in various […]

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Anticoagulant Therapy

Type 2M VWD

A LinkedIn note by Shadi Tabibian, 2nd. Laboratory Hematologist and Director, Iranian Comprehensive Hemophilia Care Center; Deputy of Research, Blood Diseases Research Center, Iran University of Medical Sciences: Can a “normal” VWF activity-to-antigen ratio rule out Type 2 von Willebrand disease? Not always. One of the most interesting diagnostic lessons from this recent review is the […]

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Bleeding Disorders

A Coag Conversation: 100 Years of VWD and Upcoming Advances: Conversation 3

On August 11, 2026, we posted the third and concluding conversation of “100 Years of Von Willebrand Disease and Upcoming Advances” with Robert F. Sidonio, Jr., MD, MSc. Click here for #3: Advanced Assays and von Willebrand Disease Management.

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Bleeding Disorders

Effect of PCC on Bleeding Patients with FXa Inhibitor

Click here for a current study report on PCC therapy in patients with FXa inhibitors who are bleeding or needing surgery: Shaw JR, Gray H, Xu Y, et al. Effect of PCC on thrombin generation in patients on FXaI with bleeding or needing urgent surgery (GAUGE). Blood Adv. 2026;10(15):5378–88. doi: 10.1182/bloodadvances.2026020203. PMID: 42275536; PMCID: PMC13452292. […]

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Bleeding Disorders

ISTH Paris Summary

Thanks to Dr. Ali Sadeghi-Khomami, PBI Research Scientist, for this downloadable comprehensive summary of the ISTH meeting in Paris.

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Events

Events and Conferences: Bleeding Disorders Conference August 13–15

Thanks to Elaine Benoit, PBI’s marketing guru, for recent updates to our Events and Conferences Calendar. This week is the NBDF’s Bleeding Disorders Conference in Orlando, FL, USA, August 13–15. It’s not too late to register. Our colleagues at George King Bio-Medical will exhibit at booth 100. If you don’t see your hemostasis-related event or […]

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Events

LinkedIn Post: FXIII Deficiency Assays

Click here for a provocative LinkedIn “Blood Doctor” post by Dr. Abdul Mannan that describes the time-honored clot solubility test and the quantitative chromogenic assay for FXIII deficiency.

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Factor Assays

Letter to STH: AI Models for Viscoelastic Assays

Click here for a summary of a letter to the STH editor: Yeong JK, Panigada M, Altememi MA, Favaloro EJ, Fan BE. Large language models for viscoelastic tests: a head-to-head evaluation of ChatGPT, Gemini, and DeepSeek for thromboelastography and ROTEM interpretation. Semin Thromb Hemost. 2026. doi: 10.1055/a-2918-4009. PMID: 42520817. In addition, click here for a […]

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Global Hemostasis Assays

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