ARUP's Laboratory Test Directory

Factor V, Activity : 0030075

Mnemonic: F5

Methodology: Clotting
Performed: Mon-Fri
Reported: 1-4 days
Specimen Required: Collect: Lt. blue (sodium citrate). Refer to Specimen Handling at aruplab.com for hemostasis/thrombosis specimen handling guidelines.

Specimen Preparation: Transfer 2 mL platelet-poor plasma to an ARUP Standard Transport Tube. (Min: 1 mL)

Storage/Transport Temperature: CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.

Remarks:

Unacceptable Conditions: Serum. Non-frozen or hemolyzed specimens.

Stability (collection to initiation of testing): Ambient: 4 hours; Refrigerated: 4 hours; Frozen: 2 weeks
Reference Interval:
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%
Note: Do not order for factor V Leiden.
CPT Code(s): 85220
Cross References: Coagulation Factor V Activity Assay, Plasma (Factor V, Activity), Coagulation Factor VII Activity Assay, Plasma (Factor V, Activity), Common Pathway Proteins, Factor V (Factor V, Activity), Labile Factor (Proaccelerin) (Factor V, Activity), Proaccelerin (Factor V, Activity), Proconvertin (Factor V, Activity)