ARUP's Laboratory Test Directory

Factor VIII, Activity : 0030095

Mnemonic: F8

Methodology: Clotting
Performed: Mon-Sat
Reported: 1-4 days
Specimen Required: Collect:  One 5 mL lt. blue (sodium citrate). (Min: 3 mL) Refer to the Hemostasis/Thrombosis 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.  For hemophiliacs: note dose, date, and time of last factor VIII concentrate infusion.

Unacceptable Conditions:  Serum.  Nonfrozen or hemolyzed specimens.

Stability:  Ambient: 4 hours; Refrigerated: 4 hours; Frozen: 2 weeks
Reference Interval:
0-6 years: 56-191%
7-9 years: 76-199%
10-11 years: 80-209%
12-13 years: 72-198%
14-15 years: 69-237%
16-17 years: 63-221%
18 years and older: 56-191%
CPT Code(s): 85240
 
 

 

 

 
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