ARUP's Laboratory Test Directory

Factor II, Activity (Prothrombin) : 0030007

Mnemonic: F2

Methodology: Clotting
Performed: Mon-Fri
Reported: 1-4 days
Specimen Required: Collect:  One 5 mL lt. blue (sodium citrate). (Min: 3 mL) Refer to the Hemostasis/Thrombosis Specimens section in the front of this User's Guide for special collection instructions.

Transport:  2 mL platelet-poor plasma, frozen. (Min: 1 mL) Submit specimen in an ARUP Standard Transport Tube.

Pediatric Collection/Transport:  1 mL platelet-poor plasma, frozen.

Remarks:  CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.

Unacceptable Conditions:  Serum.  Nonfrozen or hemolyzed specimens.

Stability:  Ambient: 4 hours; Refrigerated: 4 hours; 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%
Note: Do not order for prothrombin mutation.
CPT Code(s): 85210
 
 

 

 

 
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