ARUP's Laboratory Test Directory

Factor IX, Activity : 0030100

Mnemonic: F9

Methodology: Clotting
Performed: Mon-Fri
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 IX 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:
1-4 days: 15-91%
5-29 days: 15-91%
30-89 days: 21-81%
90-179 days: 21-113%
180-364 days: 36-136%
1-5 years: 47-104%
6 years: 63-89%
7-9 years: 70-133%
10-11 years: 72-149%
12-13 years: 73-152%
14-15 years: 80-161%
16-17 years: 86-176%
18 years and older: 78-184%
CPT Code(s): 85250
Cross References: Antihemophilic Factor B (Factor IX, Activity), Christmas Factor (Factor IX, Activity), Coagulation Factor IX Activity Assay, Plasma (Factor IX, Activity), Hemophilia B (Factor IX, Activity), Intrinsic Factor Proteins (Factor IX, Activity), Intrinsic Factors (Factor IX, Activity), Plasma Thromboplastin Component (PTC) (Factor IX, Activity)
 
 

 

 

 
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