Method Name
Clot Detection
Aliases
Factor VIII Activity; Factor VIII; Factor 8 Activity, Factor VIII Activity
Specimen Required
One full 2.7 mL (3.2% sodium citrate) blue top tube. Specimen will be rejected if the tube is underfilled or overfilled.
Specimen Minimum Volume
2.7 mL of blood
Specimen Stability Information
Specimen is stable for 4 hours, if it is not centrifuged or refrigerated. Otherwise the specimen should be centrifuged, the plasma removed, and the plasma frozen at -70 degrees C for up to 2 weeks.
Performing Laboratory
LabCorp
Reference Values
50 – 150 % activity