Specimen:

Plasma

Collection Medium:

Minimum:

Full draw; any size blue top (mix well)

Testing
Schedule:

0800-1630 Monday through Friday.

Analytic Time:

24 hours (upon receipt in laboratory)

Comments:

Recommended target range for treatment of DVT or venous thromboembolism 
is 0.4-0.7 U/ml.

Methodology:

Anti Xa activity by chromogenic substrate.

Sample
Processing:

Centrifuge within one hour of draw time.
Aliquot serum/plasma into plastic container and cap (glass is not 
acceptable).
Label transport tube with two patient identifiers, date and time of 
collection.
Centrifuge a second time at 3500 RPM for 10 minutes and aliquot into a 
new, labeled plastic tube.

Sample
Storage:

Freeze specimen immediately.

Transport
Instructions:

Place specimen into zip-lock type bag, seal bag.
Place requisition into outside pocket of bag.
Place dry ice on top of specimen in styrofoam container.

CPT Code:

85520

See Additional Information:
Phlebotomy Tubes and Order of Draw