Fletcher Factor Assay
12 days
Factor prekallikrein activity is determined utilizing an aPTT-based one-stage clotting time assay. Factor prekallikrein-depleted plasma is used as the substrate and the clotting time with the patient plasma is compared to theclotting time of normal pooled plasma
Accredited Laboratory Partner
Contact Technical Support
Tests for prekallikrein deficiency. Rare cause of prolonged aPTT.
Plasma
2 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 | 2 weeks |
Fletcher Factor Assay
12 days
Factor prekallikrein activity is determined utilizing an aPTT-based one-stage clotting time assay. Factor prekallikrein-depleted plasma is used as the substrate and the clotting time with the patient plasma is compared to theclotting time of normal pooled plasma
Accredited Laboratory Partner
Contact Technical Support
Tests for prekallikrein deficiency. Rare cause of prolonged aPTT.
Plasma
2 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 | 2 weeks |