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Factor VIII (8) Activity – Chromogenic (Bovine Reagent)

Justification

Chromogenic Factor VIII (8) Activity allows for the detection of residual Factor VIII (8) Activity in patients receiving the recombinant, monoclonal antibody treatment Hemlibra (emicizumab) that interferes with traditional clotting assays.

STAT: < 24 hours (M-F)

Chromogenic

Draw Tube: Blue Top

Sample Type: Citrated Plasma

Specimen Requirements

Sample Type Volume Required Minimum Volume Stability
PREFERRED Citrated Plasma 1mL 0.5mL Room Temp.: 2 hours
Refrigerated: 2 hours
Frozen (-20C): 2 weeks
Frozen (-80C): 6 months
ALTERNATIVE - - - -
REJECTION CRITERIA Thawed in transit, refrozen or clotted sample
SPECIAL INSTRUCTIONS -

General Information

METHODOLOGY Chromogenic
STAT TAT < 24 hours (M-F)
STAT TAT Performance > 90% of results released in 24 hours
ROUTINE TAT < 3 days (M-F)
ALTERNATIVE NAMES Chromogenic Factor VIII (8) Activity, Factor VIII (8) Activity - Bovine Reagent, Factor VIII (8) Activity - Hemlibra specific, F8 chromogenic, FVIII chromogenic
DESCRIPTION Chromogenic assay for the quantitative detection of patient Factor VIII (8) Activity.
LIMITATIONS -
NORMAL RANGE 50-150%
ASSOCIATED TESTING -
REFERENCES -
SAMPLE REPORT Upon request
NEW YORK STATE APPROVED -

Test Codes

ORDER CODE P3380
CPT CODE 85240
LOINC CODE 3210-2