ARUP's Laboratory Test Directory

Factor XI, Activity : 0030110

Mnemonic: F11

Methodology: Clotting
Performed: Mon-Fri
Reported: 1-4 days
Specimen Required: Collect:  One 5 mL lt. blue (sodium citrate).  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 (lt. blue, sodium citrate), frozen. (Min: 1 mL) Submit specimen in an ARUP Standard Transport Tube.

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: 10-66%
5-29 days: 23-87%
30-89 days: 27-79%
90-179 days: 41-97%
180-364 days: 38-134%
1-5 years: 56-150%
6 years:  52-120%
7-9 years: 70-138%
10-11 years: 66-137%
12-13 years: 68-138%
14-15 years:  57-129%
16-17 years: 65-159%
18 years and older: 56-153%
CPT Code(s): 85270
 
 

 

 

 
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