ANTI XA LMWH

Heparin Anti-Factor Xa Low Molecular Weight Heparin, Plasma

EPIC Test Procedure Code: LAB2184

Synonyms:
Lovenox level
Enoxaparin level
Heparin (Lovenox)
LMWH
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 hour 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. AntiXas will not be run on specimens > 2 hours old.

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

85520 - Heparin Anti Factor XA Assay UFH (EAP 30021165)

Test Schedule:
Monday through Sunday
Method:
Chromogenic
Reference Ranges:

Treatment of venous thromboembolism (VTE)

Twice daily:

0.5 - 1.0

U/mL

Once daily:

1.0 - 2.0

U/mL

Prophylaxis of VTE:

0.2 - 0.4

U/mL
Notes:

Used to monitor low molecular weight heparin therapy.

Lab Personnel

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