FACTOR IX (9) INHIBITOR WITH ACTIVITY

Additional Codes

Software	Test Code
Label Text	INHIX
EPIC	LAB20290

Performing Laboratory

NorDx Laboratories

Useful For

Detecting the presence and titer of a factor inhibitor directed against Human Factor IX

Method Name

Automated Clot-Based Assay

Reference Values

<0.6 BIU/mL

Days and Times Test Performed

Varies

Report Available

Approximately 48 hours for STAT collections

Approsimately 1 week for routine collections

Specimen Type

Plasma

Preferred Container

2 x Light Blue Top Tube (Sodium Citrate) – Tubes must be full at time of collection.

Specimen Collection and Handling

Collect specimen as follows:

1. Draw blood in light blue-top (3.2% sodium citrate) tubes. Tubes must be full upon collection.

2. Separate plasma from cells as soon as possible within 4 hours of collection in a centrifuge at 2,500 rpm for 15 minutes or 3,000 rpm for 10 minutes.

3. Using a plastic transfer pipette (do not use a glass pipette) decant the plasma to a screw-capped, plastic (polypropylene) vial. Glass vials will not be accepted.

4. Spin the plasma again at 2,500 rpm for 15 minutes or 3,000 rpm for 10 minutes. Note: Double spinning the specimen ensures platelet poor plasma (<10,000 uL)

5. Divide the plasma into as many 0.5-1.0 mL aliquots as possible and cap the vial(s) tightly.

6. Place tubes upright and flash freeze specimen(s) immediately at ≤ – 20° C or below.

7. Send specimen(s) FROZEN on dry ice.

Click here to view the Procedure for Collecting a Specimen from an A-line

Specimen Stability Information

Specimen Type: Plasma

Room Temp: 4 Hours

Note: Whole blood that remains capped and unspun is stable for up to 4 hours when stored at room temperature (18 – 24C). Frozen plasma is stable 2 weeks @ -20C and 12 months @ -70C. Blue top tubes for factor assays must not be refrigerated or placed on ice.

Add On Capable

Not Permitted

CPT Code Information

CPT Code	CPT Description	CPT Disclaimer
85250	Clotting, Factor IX (PTC or Christmas)
85335	Factor Inhibitor Test

Performing Laboratory Location