Factor II, Activity (Prothrombin)
0030007
Ordering Recommendation
Evaluate for possible factor II deficiency.
Mnemonic
F2
Methodology
Electromagnetic Mechanical Clot Detection
Performed
Mon-Fri
Reported
1-3 days  
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
Specimen Required
Patient Preparation
  
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.  
Unacceptable Conditions
Serum, EDTA plasma, or hemolyzed specimens.  
Remarks
 
Stability
Ambient: 4 hours; Refrigerated: Unacceptable; Frozen: 2 weeks  
Reference Interval
1-4 days: 26-70%
5-29 days: 33-93%
30-89 days: 34-102%
90-179 days: 45-105%
180-364 days: 60-116%
1-5 years: 71-116%
6 years:  67-107%
7-9 years: 78-125%
10-11 years: 78-120%
12-13 years: 72-123%
14-15 years: 75-135%
16-17 years: 77-130%
18 years and older: 86-150%  
Interpretive Data
 
Note
Do not order for prothrombin mutation.
CPT Code(s)
85210
Components
Component Test Code*Component Chart NameLOINC
0030007Factor II, Activity (Prothrombin)3289-6
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • Coagulation Factor II Activity Assay, Plasma
  • Common Pathway Proteins, Factor II
  • FACTOR II ACTIVITY
  • Factor II, Plasma
  • Prothrombin