Stuart Prower Factor
7 days
Factor X is activated by Russell viper venom which, in turn, hydrolyzes a chromogenic substrate to produce color.
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A functional assay that measures the activity of Factor X using a chromogenic substrate. It's used to diagnose Factor X deficiency and monitor certain anticoagulant therapies, such as direct Factor Xa inhibitors (e.g., rivaroxaban, apixaban), with higher specificity and less interference compared to clot-based assays.
Plasma
1 mL
Blue top (sodium citrate) tube
No special preparation is required for this test. You may eat, drink, and take your medications as normal, unless instructed otherwise by your healthcare provider.
Citrated Plasma samples should be collected by double centrifugation
| Temperature | Period |
|---|---|
| Frozen | 28 days |
| Freeze/thaw cycles | Stable x3 |