Key result
Heparin-calibrated anti-Xa assays provide a rapid, pragmatic, and validated method to rule out clinically significant factor Xa inhibitor levels in emergency settings.
Why the study?
Can heparin-calibrated anti-Xa assays accurately assess factor Xa inhibitor plasma concentrations?
Can heparin-calibrated anti-Xa assays accurately assess factor Xa inhibitor plasma concentrations?
Answers are grounded in this paper and cite their sources.
Heparin-calibrated anti-Xa assays may serve as a viable alternative for assessing factor Xa inhibitor levels when specific calibrated assays are unavailable.
By Brian W. Gilbert, Brock Townsend. Multiple independent studies have shown a strong correlation between heparin-calibrated anti-Xa activity and factor Xa inhibitor plasma concentrations.
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Gilbert et al. (2026) conducted an editorial in Factor Xa inhibitor associated coagulopathy. Heparin-calibrated anti-Xa assay vs. Chromogenic factor Xa assays or subjective assessment was evaluated. Heparin-calibrated anti-Xa assays provide a rapid, pragmatic, and validated method to rule out clinically significant factor Xa inhibitor levels in emergency settings.
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