Specimen

Plasma

Collection Medium:

Minimum:

Full draw; any size blue top

Rejection Criteria:

Short drawn tube, clot, traumatic tap (excessive hemolysis).

Delivery Instructions:

Deliver to laboratory immediately after collection.

Testing Schedule:

0800-1630 Monday through Friday.  For additional services, 
contact Clinical Pathology Resident on-call at pager #3404.

Analytic Time:

24-36 hours

Reference Range:

Greater than 50%

Therapeutic reference range is 11-42%

Comments:

Must have Hematology Consult approval from pager 4326.

Test
Limitations:

This test is to be used for coumadin monitoring of patients with 
positive Lupus anticoagulants.

Methodology:

Activity detection by chromogenic substrate

CPT Code:

85260

See also:
Coagulation Factor Assays, Plasma

See Additional Information:
Phlebotomy Tubes and Order of Draw
Specimens Requiring Immediate Delivery