Sign in →

Test Code LAB306 FACTOR 8 ASSAY

Important Note

This FVIII activity is clot-based and will overestimate the endogenous factor activity in the presence of emicizumab (Hemlibra).

Additional Codes

Orderable Codes:

Epic Code Atlas Code Mayo Access ID Order LOINC
LAB306 FA8 FAH220 3209-4

Result Component(s):

Reporting Name Epic Code Atlas Code Mayo Access ID Result LOINC
Factor VIII 12301000117 FA8 FAH220 3209-4

 

Specimen Information

Container Specimen Temperature Collect Vol Submit Vol Min Vol Stability
Blue Top Tube Plasma Frozen To fill line 2 mL plasma 1 mL plasma 6 Months
Blue Top Tube Whole Blood Ambient To fill line To fill line To fill line 4 Hours

Refer to Coagulation Specimen Handling before collecting. Submit 2 × 0.5 mL frozen plasma aliquots for this test. Draw blood in light blue top tube(s). Spin down, remove plasma, spin plasma again, and place citrate platelet-poor plasma in required number of plastic vials (Glass vials cannot be accepted.)  Freeze specimen at less than or equal to minus 40° C, if possible. Send specimen frozen on dry ice. 

Test Schedule / Analytical Time / Test Priority

Monday – Friday / 1 day / Available STAT, nights and weekends with pathologist approval

Method

Photo Optical Clot Detection

Instrumentation

ACL Top 

Reference Range

Age Reference Range Units
0 up to 1 day 50 - 178 %
1 day up to 5 days 50 - 154 %
5 days up to 1 month 50 - 157 %
1 month up to 3 months 50 - 150 %
3 months up to 6 months 50 - 109 %
6 months up to 1 year 50 - 150 %
1 year up to Unspecified 50 - 150 %

 

Section

Coagulation

Performing Location

University of Vermont Medical Center

Is the UVMMC lab NY State Certified to perform this testing?  Yes/No

Yes

CPT Code(s)

Description CPT Code
Factor 8 Assay              85240