Quality Management in a Hemostasis Laboratory

Here’s an open-access August 2025 article, Sarkar MK, Quality management in a hemostasis laboratory. This article is an excellent companion to our August 29, 2025 post, Hemostasis Assay Statistical Variability. The August post referenced my colleague and friend, Dr. Mayukh Sarkar, who narrated our Hemostasis Quality Control units that are linked in the August post […]

Comments (0)

Validation

Aug 29 2025

george

Hemostasis Assay Statistical Variability

Here is an open-access commentary that addresses concerns about hemostasis assay statistical variability as it relates to clinical significance. Click: Mullier F, Gouin-Thibault I, Meijer P, et al. Time to integrate measurement uncertainty in method comparison and interpretation of hemostasis laboratory assays. Res Practice Thromb Hemost 2025: 9, https://doi.org/10.1016/j.rpth.2025.102993. For a two-part discussion about hemostasis quality assurance […]

Validation

Poster: Monitoring FVIII in Hemophilia Patients Treated with Bypassing Therapeutics

To review the PBI poster presented at the 2025 ISTH meeting, click Effect of Mim8 and Emicizumab on Factor VIII Recovery by a Novel, Bovine Chromogenic FVIII Assay. Tara Quinton, Meghan Bruhm, Karen M. Black, Ali Sadeghi-Khomami. Precision BioLogic Inc., Dartmouth, Nova Scotia, Canada. The poster illustrates the validity of bovine reagent-based chromogenic substrate FVIII […]

Bleeding Disorders

Indirect Reference Interval Determination

Sarkar MK, Fritsma GA, Chapter 3, Quality Assurance in Hematology Testing; Keohane EM, Butina MM, Mirza KM, Walenga JM. Rodak’s Hematology: Clinical Principles and Applications Edition 7 states the following: “Indirect RIs may be derived from stored patient data. The QC specialist mines the laboratory database to compute the mean and confidence interval. Indirect RI […]

Validation

Manual Tilt Tube PT

Here is an open-access editorial commenting on the tilt-tube PT requirement for establishing the reagent thromboplastin ISI. Favaloro EJ. Manual tilt tube method for prothrombin time: a commentary on contemporary relevance. Clin Chem Lab Med. 2025;63:1239–42. doi: 10.1515/cclm-2025-0157. PMID: 39985393.

Screening Assays

What is NASCOLA?

I (Geo) enjoyed dining with our NASCOLA colleagues on Wednesday, 7 May 2025, while attending the 2025 ISLH annual meeting in Halifax, NS. NASCOLA is a nonprofit organization that provides proficiency testing services for North American laboratories that perform diagnostic testing for bleeding or thrombotic disorders, thereby improving performance standards. NASCOLA reviews and assists with […]

Validation

Lab Developed Tests Rule

Thanks to PBI’s Dean Willett for his heads-up about the March 31, 2025 ruling, “FDA‘s LDT Rule Struck Down in Texas Court.” The US FDA‘s 2024 “Final Rule” outlined plans to subject lab-developed tests to the same requirements as medical devices. The Texas ruling illustrates the US struggle to achieve a realistic approach to validation […]

Events

How to Improve Lab Testing

From Heather DeVries: In the scope of the whole world, how do labs search for new ways to improve their laboratory testing? Would it just be typing in the search bar, or are there ways to find the latest information randomly while looking for other things? George replies, Heather, my surface-level response is to suggest […]

Specimen Management

Differential Discussions: VWD Type 1 and RCo.

Thanks to Malissa Norfolk and David Calder for our Differential Discussions conversation describing the time-honored Ristocetin Cofactor (VWF:RCo) test for von Willebrand factor activity, a member of the von Willebrand disease diagnostic assay, released January 1, 2025 on YouTube. Please click the link and join the discussion.

Bleeding Disorders

Hot Topics in Hemostasis: Nomenclature Standardization

Frequent contributor David L. McGlasson is featured in the Differential Discussions series hosted by Assistant Professor David Cabral, MBA, MLS(ASCP)cm, SH(ASCP)cm of the University of Massachusetts Dartmouth, and Assistant Professor Malissa Norfolk, MBA, MLS(ASCP)cm, SH(ASCP)cm, of the University of Maine-Augusta faculty. Click here to meet Malissa and David, and to hear Mr. McGlasson’s discussion of […]

Comments (0)

Coagulation Factors

Validation

Quality Management in a Hemostasis Laboratory

Hemostasis Assay Statistical Variability

Poster: Monitoring FVIII in Hemophilia Patients Treated with Bypassing Therapeutics

Indirect Reference Interval Determination

Manual Tilt Tube PT

What is NASCOLA?

Lab Developed Tests Rule

How to Improve Lab Testing

Differential Discussions: VWD Type 1 and RCo.

Hot Topics in Hemostasis: Nomenclature Standardization

George Fritsma MS MLS

Cheat Sheets from George

Questions or Comments?

Quick Question