Thrombophilia Guidelines
From Mohamed Bashir, originally posted November 17, 2012: What is the guideline for thrombophilia testing, how to test antithrombin (AT, antithrombin III, ATIII), protein C (PC), and protein S (PS)....
View ArticleWhy Express Factors in Percent?
This is from Ann McConnell, East Carolina University, first posted on November 19: Why are factor activity assays reported in the range of 50%–150%? I am having a difficult time wrapping my mind around...
View ArticleFVIII Linearity; LA Testing
From Mahnaz Sairi, Associate Director of Hematology, MBHN: Hi George: What is the highest limit we can report For FVIII? And how we determine this? Is it by clinical significance or by instrument...
View ArticleDelta Checks for PT,PTT, Fg, and D-dimer
Lisa Ledford at Duncan Regional Hospital asks, Would you be willing to share your δ-check values for the following tests? PT/INR PTT Fibrinogen D-dimer Thanks, Lisa Hi, Lisa, I checked with Warren...
View ArticleD-dimer of 0.0 ng/mL?
From Joanna Carroll, MT (ASCP), North Carolina State University College of Veterinary Medicine. We are running automated D-dimers and recently got a result of 0.00 ng/mL. Have you seen a value reported...
View ArticleWe Are Current
George has caught up with our lost posts from November 2–24 and with our subsequent posts. If you have sent me a message or a comment and you don’t see it here, please re-send it and I will get it...
View ArticleAnti-Xa Calibrators
This post comes from Scott Miller, St. Mary’s of Michigan: We will soon be validating our activated partial thromboplastin time (APTT, PTT) heparin therapeutic range by using a comparison between an...
View ArticleOctober Cheat Sheet Restored
Our recent crash wiped out our October Cheat Sheet, the monthly summary of October posts. While the Sheet has been delivered via “push” email to our participants, you may wish to use it on the site in...
View ArticleBD Recalls Citrate Tubes
From Kelly Townsend at Tricore Reference Laboratories in Albuquerque: Just got a letter stating that BD Vacutainer is recalling a lot of their 2.7 mL sodium citrate tubes due to lithium heparin...
View ArticleFDA Requires Precise Heparin Label
Elaine Benoit, Precision BioLogic, sent an FDA alert regarding a heparin label change. “This label change will require manufacturers of Heparin Lock Flush Solution, USP and Heparin Sodium Injection,...
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