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Factor II, Activity (Prothrombin)
0030007
Ordering Recommendation

Evaluate for possible factor II deficiency.

Mnemonic
F2
Methodology
Electromagnetic Mechanical Clot Detection
Performed
Mon-Sat
Reported
1-3 days
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
ARUP Consult®
Disease Topics
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, clotted or hemolyzed specimens. 
Remarks
 
Stability
Ambient: 4 hours; Refrigerated: Unacceptable; Frozen: 2 weeks 
Reference Interval
AgeReference IntervalAgeReference Interval
1-4 days26-70%7-9 years78-125%
5-29 days33-93%10-11 years78-120%
30-89 day34-102%12-13 years72-123%
90-179 days45-105%14-15 years75-135%
180-364 days60-116%16-17 years77-130%
1-5 years71-116%18 years and older86-150%
6 years67-107%

Interpretive Data


Note
Do not order for prothrombin mutation.
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