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July 2022 QQ: Reduced concentration RIPA test.

Our July 2022 Quick Question asks, “What von Willebrand disease [VWD] subtype is identified using the reduced concentration ristocetin-induced platelet aggregometry [RIPA] test?” Many of the VWD types and subtypes are currently identified using molecular diagnosis, however, the “legacy” phenotypic tests often provide a speedy and inexpensive shortcut. This may be one such case. Please […]
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Heparin Curve to Measure DOACs?

Does your facility measure rivaroxaban or apixaban using a chromogenic substrate anti-Xa assay based on unfractionated heparin [UFH] calibrators or UFH-low molecular weight heparin [UFH-LWMH] ‘hybrid” calibrators, or do you require rivaroxaban and apixaban calibrators? I [Geo] received a 6-22-22 response from international hemostasis expert Robert Gosselin, who cited several references. Many of us use […]
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EC Markers in COVID19 Thromboinflammation

The devastating COVID19 pandemic has led medical researchers led by Brandon M. Henry, MD, Division of Nephrology and Hypertension, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA to identify and characterize the pathophysiology of a number of thromboinflammation-related endothelial secretions. Some important terms relatively new to medical laboratory science include ADAMTS13/VWFag ratio, NETosis, and cell-free […]
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