ARUP's Laboratory Test Directory

Factor VIII, Activity : 0030095

Mnemonic: F8

Methodology: Clotting
Performed: Mon-Sat
Reported: 1-4 days
Specimen Required: 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.

Remarks: For hemophiliacs: Note dose, date, and time of last factor VIII concentrate infusion.

Unacceptable Conditions: Serum. Non-frozen or hemolyzed specimens.

Stability (collection to initiation of testing): 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
Cross References: AHF (Factor VIII, Activity), Antihemophilic Factor (AHF), Factor VIII:C (Coagulant Portion) (Factor VIII, Activity), Antihemophilic Factor (Factor VIII, Activity), Coagulation Factor VIII Activity Assay, Plasma (Factor VIII, Activity), Hemophilia A (Factor VIII, Activity), Intrinsic Factor Proteins (Factor VIII, Activity), Intrinsic Factors (Factor VIII, Activity)
 
 

 

 

 
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