Casandra
Casandra Test Code QD85808Version 1 (DRAFT)
Performing Lab
Factor VIII Activity, Clotting with Reflex to Chromogenic Method
Clinical Use
Order TestUse
Determines the functional activity of Factor VIII using a one‑stage aPTT‑based clotting assay. If the clotting‑based assay result is abnormal or inconclusive, the test reflexes to a chromogenic assay, which is useful especially in the presence of interfering substances or therapies like emicizumab.
Special Instructions
Not provided.
Limitations
Not provided.
Test Details
Methodology
Automated Analyzer (Coagulation)
Biomarkers
2 components
Factor VIII Activity, Clotting • CoagulationFactor VIII Activity, Chromogenic (reflex) • Coagulation
Result Turnaround Time
Not provided.
Related Documents
For more information, please review the documents below
Specimen Requirements
Specimen
Plasma
Volume
Not provided
Minimum Volume
Not provided
Container
light blue top tube (citrate)
Collection Instructions
Collect blood in light blue top (citrate) tube, process to platelet‑poor plasma
Storage Instructions
Freeze plasma and ship frozen
Similar Tests
Other tests from different labs that may be relevant
Factor VIII Activity
Labcorp
Chromogenic Factor VIII Activity Assay, Plasma
Mayo Clinic Lab
Factor VIII Chromogenic Activity
Labcorp
Factor VIII, Activity
ARUP Laboratories
Chromogenic Factor VIII, Activity
ARUP Laboratories
Factor VIII Activity with Reflex to Bethesda Quantitative, Factor VIII
ARUP Laboratories
Coagulation Factor VIII Activity Assay, Plasma
Mayo Clinic Lab
Factor VIII Antigen
Labcorp
Factor VIII Chromogenic Bethesda Profile, for Patients on Emicizumab
Labcorp
Nonsevere Hemophilia A Profile
Labcorp