FACTOR V ACTIVITY

Specimen Required
Draw blood in a light blue 3.2% sodium citrate tube. See appendices for coagulation test collection instructions. Send 2.0 mL plasma (1.0 mL minimum) frozen in a screw-capped plastic vial. CRITICAL FROZEN.
Note: DO NOT order for Factor V Leiden mutation

Rejection Criteria
Serum, non-frozen or hemolyzed specimens

Methodology
Clotting

Stability
Room Temperature: Unacceptable; Refrigerated: 4 hours; Frozen: 14 days

Reference Range
1-4 days:   36-108%  
5-29 days:   45-145%  
30-89 days:   62-134%  
90-179 days:   48-132%  
180-364 days:   55-127%  
1-5 years:   79-127%  
6 years:   63-116%  
7-9 years:   69-132%  
10-11 years:   66-136%  
12-13 years:   66-135%  
14-15 years:   61-129%  
16-17 years:   65-131%  
18 years and older:   62-140%  

Performed
Monday-Friday

Turnaround Time5-7 days
Test CodeF5AR
CPT-4 Code (s)
85220
LOINC Codes
3193-0

Warde
Medical
Laboratory