Cord Blood VWF & FVIII Levels

On Monday, 5-18-26, Stuart Lind, MD, University of Colorado Hospital and School of Medicine, asked, “Would you know of any primary references that validate cord blood levels?” A PubMed search yielded this reference describing VWF levels, available from your medical library: Schneider DM, von Tempelhoff GF, Herrle B, Heilmann L. Maternal and cord blood hemostasis […]

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Coagulation Factors

May 15 2026

george

Clot Waveform Analysis

Click here for this open-access article on waveform analysis and for access to Seminars in Thrombosis and Hemostasis Issue 4, 2026: Tan JY, Raden M, De Guzman T, Wong WH. Decoding clot waveform analysis: toward better understanding and harmonization. Semin Thromb Hemost 2026; 52(04): 460-475 DOI: 10.1055/a-2778-9810. Abstract Clot waveform analysis (CWA) extends routine coagulation […]

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Global Hemostasis Assays

May 15 2026

george

Perioperative Management of Antiphospholipid Syndrome Study

Click here for the open-access article, Paquette M, Miranda S, Xu Y, et al. Perioperative management of antithrombotic therapy in patients with thrombotic antiphospholipid syndrome. Blood Adv. 2026;10(9):3218–28. doi: 10.1182/bloodadvances.2026019610. PMID: 41843780; PMCID: PMC13136740. Abstract Patients with thrombotic antiphospholipid syndrome (APS) frequently require interruption of anticoagulation for invasive procedures; however, data to guide the perioperative […]

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Anticoagulant Therapy

May 15 2026

george

Coagulation Overview Module

We’re reviewing our Educational Modules for timeliness. Many institutions use Coagulation Overview for both introductory education and advanced review. You can complete it in <30 minutes, but you may wish to stop at intervals to observe the various diagrams in detail just by pressing the space bar. The module supplements Walenga JM, Krom KN: Chapter […]

Coagulation Factors

Aspirin Prophylaxis

The question appeared on the Diagnostic Equity site, paraphrased with the approval of site proprietor Tamara Lobban-Jones: “I’ve heard that some people take a ‘ton of baby aspirin.’ My doc told me to take only one a day. Does taking multiple tablets help with clotting? What does taking one aspirin do to the blood, and […]

Antiplatelet Therapy

VWD Test Panel: A Correction

Thanks to Dr. Emmanuel Favaloro for pointing out an error in our April 29 post, “Quick Question Results, VWF Activity.” I (Geo) had transposed the principles of the VWF:GP1bR and VWF:GP1bM. I’ve corrected the error in the April 29 post–the correct principles are that VWF:GP1bR employs ristocetin, whereas VWF:GP1bM employs a gain-of-function form of GP1b […]

Bleeding Disorders

April 2026 Cheat Sheet

Click here to see your May 1, 2026, Cheat Sheet. Go to the link on the right to ensure that you receive your own “push” Cheat Sheet, complete with links to all our April posts.

Cheat Sheets

May 2026 QQ: Proconvertin

Our May 2026 QQ is another “memory lane” quiz that asks, “What factor was once named proconvertin, stable factor, autoprothrombin I, or serum prothrombin conversion accelerator (SPCA)? For space purposes, the stem is shortened to ‘Proconvertin or SPCA?‘ ” Click first on Posts to navigate to the QQ in the right column. Corriveau DM, Plasma […]

Coagulation Factors

April 2026 QQ Results: VWF Activity

Our April 2026 Quick Question reprises our 2023 QQ that asked, How do you measure VWF activity. Our 29 respondents answered as follows: VWF:RCo: 16 (56%) VWF:GP1bR: 6 (21%) VWF:GP1bM: 5 (16%) VWF:CB: 2 (7%) RIPA: 0 Our 4-1-2026 introductory QQ post attracted this comment from Dr. Emmanual Favaloro, Sydney, NSW, Australia: Hi George, of course, […]

Bleeding Disorders

A Comparison of The Clauss Fibrinogen Assay with the Prothrombin Time-derived Assay

Click here for an open-access 2026 article comparing the time-honored Clauss fibrinogen assay with the PT-derived assay: Latona A, Hill K, Rane M, Ho A, Mitra B. Diagnostic accuracy of Clauss and prothrombin time-derived fibrinogen against rotational thromboelastometry FIBTEM-A5. Res Pract Thromb Haemost. 20266;10:103439. doi: 10.1016/j.rpth.2026.103439. PMID: 42027315; PMCID: PMC13100266. Abstract Background: Fibrinogen levels may […]

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Factor Assays

All Posts

Cord Blood VWF & FVIII Levels

Clot Waveform Analysis

Perioperative Management of Antiphospholipid Syndrome Study

Coagulation Overview Module

Aspirin Prophylaxis

VWD Test Panel: A Correction

April 2026 Cheat Sheet

May 2026 QQ: Proconvertin

April 2026 QQ Results: VWF Activity

A Comparison of The Clauss Fibrinogen Assay with the Prothrombin Time-derived Assay

George Fritsma MS MLS

Cheat Sheets from George

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