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Test Code HEPXA Heparin Anti - Xa Assay, Plasma

Additional Codes

Epic EAP: LAB2459

Epic Description: ANTI-XA HEPARIN MONITORING

Collection Limitations

Order test as TIMED TEST.

Due to stability issues, HEPXA cannot be added onto any previously received lab tests.

Specimen Type

Blood

Specimen Required

 

 

  Collection Container Preferred Volume Minimum Volume
Preferred

Light Blue, Sodium Citrate

2.7 mL 2.7 mL

 

Instructions for Collection and Transport

Fill tube to stated capacity. Do not underfill or overfill past tube’s vacuum capacity. If the patient’s known hematocrit value is above 55%, an adjustment of the ratio of anticoagulant to blood is necessary. Call the laboratory for a special collection tube for that hematocrit value.

 

Centrifuge 15 minutes at minimum speed of 3,000 rpm’s or the required speed to acheive Platelet Poor Plasma. Aliquot plasma into plastic vial. Transport within 2 hours of collection on freeze packs. If transport to take place more than 2 hours post collecion, freeze plasma and transport on dry ice. Note: it is very important to have platelet poor plasma before freezing. The platelet count on the aliquoted plasma should be <10,000.

 

Home Health Agencies: Transport to lab within 30 minutes.

Aliquot Requirements

Plasma

Optimum 1.5 mL

Minimum 0.75 mL

Performing Lab

Hematology Lab

Assay Frequency

Daily

CSR Storage Requirements

Transport to Hematology lab STAT

CPT Code Information

85520