ANTI XA UFH

Heparin Anti-Factor Xa Unfractionated Assay, Plasma

EPIC Test Procedure Code: LAB2185

Performing Lab:
Saint Luke's Regional Laboratories
Container Type:
Light blue top (sodium citrate) tube
Specimen Type:

Platelet Poor Plasma

Preferred Volume:
2 mL
Minimum Volume:
1 mL
Collection Procedure:
Specimen Processing:

1. Centrifuge specimen in a centrifuge that has been validated to ensure platelet poor plasma. Centrifugation should take place within 1 hr of collection.
2. If plasma is to be frozen: 
         a. Immediately transfer the plasma to a stoppered, plastic tube and centrifuge again for 10 minutes.
         b. Transfer the supernatant plasma into a screw-capped, plastic vial and send frozen.
3. If unable to centrifuge, forward unprocessed sodium citrate whole blood (minimum volume: 2 mL) to the laboratory promptly at room temperature only.
The unspun specimen must arrive within 30 minutes of collection. Anti-Xas will not be run on specimens > 2 hours old.

Store and Transport:
Plasma - frozen (unless performed at your facility)
CPT Codes:

85520 - Anti Factor XA Assay UFH (EAP 30021175)

Test Schedule:
Monday through Sunday
Method:
Chromogenic

Reference Ranges:

UFH

- Therapeutic range

0.3 - 0.7

IU/mL

(or as specified by order set or physician).

UFH

- Critical values (automatic call-back):

> 1.1

IU/mL
Notes:

Used to monitor unfractionated heparin (UFH).

Lab Personnel

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