Antihemophilic Factor (AHF
9 days
Factor VIII activity is determined by a two-stage chromogenic substrate assay where the amount of activated factor X generated is proportional to the amount of functional FVIII present in the test plasma in the presence of excess activated FIX. The amount of activated factor X generated is read with a chromogenic substrate and the activity is determined from a standard curve.
Accredited Laboratory Partner
Contact Technical Support
Detects inhibitors to Factor VII. Used in unexplained bleeding with prolonged PT and low Factor VII activity.
Plasma, Frozen
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 | 14 days |
| Freeze/thaw cycles | stable x2 |
Antihemophilic Factor (AHF
9 days
Factor VIII activity is determined by a two-stage chromogenic substrate assay where the amount of activated factor X generated is proportional to the amount of functional FVIII present in the test plasma in the presence of excess activated FIX. The amount of activated factor X generated is read with a chromogenic substrate and the activity is determined from a standard curve.
Accredited Laboratory Partner
Contact Technical Support
Detects inhibitors to Factor VII. Used in unexplained bleeding with prolonged PT and low Factor VII activity.
Plasma, Frozen
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 | 14 days |
| Freeze/thaw cycles | stable x2 |